Monolithic Power Systems (MPWR) insider buying and selling

Get an email when an insider buys Open-market purchases are rare: the insider is spending their own money. One email the day the Form 4 lands, with the filing linked. It needs a free account, and the alert arrives off: you turn it on yourself.

Every Table I transaction reported by directors and officers of S&P 500 companies on SEC Form 4 filings (2 business days to file): each row labeled with its official transaction code, nothing filtered out beforehand.

Open-market purchases (code P) are the rare signal, in green; sales (code S) are common and often pre-scheduled (10b5-1). Table II (derivatives) is not included: its prices are exercise prices, not market values. Guide: insider buying.

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Insider transactions filed on SEC Form 4: date, company, insider, role, shares, price, amount, percentage of the holding and transaction type.
Date	Ticker	Insider	Role	Shares	Price	Amount	% of stake	Type / filing

Download these transactions as CSV No account, no sign-up. The data is public: it comes from SEC Form 4 filings.

Monolithic Power Systems, Inc. (MPWR) insider buying and selling: no purchases, 65 sales

102 Form 4 Table I transactions filed with the SEC by Monolithic Power Systems, Inc. insiders between 2025-08-28 and 2026-09-30 (15-month history): 0 open-market purchases and 65 sales, plus 37 transactions under other Form 4 codes, broken down one by one below. The largest open-market trade is a sale of $64.3M by Hsing Michael on 2026-02-06.

Monolithic Power Systems insider buying and selling over the last 12 months

Between Oct 21, 2025 and Oct 20, 2026, Monolithic Power Systems insiders filed 57 sales worth $729.1M on the open market, and no purchases.

The biggest seller was Hsing Michael (CEO): $354.8M in 8 sales, out of 11 different sellers.

The largest trade of the period was a sale of $64.3M on Feb 6, 2026, by Hsing Michael (CEO). Form 4 on sec.gov (0001214659-26-001447).

Of the 57 sales, 24 (42%, $259.9M) carry the 10b5-1 plan flag on the Form 4, meaning they were scheduled months ahead; the other 33 do not.

The last three months show 7 sales, against 17 in the three before. The latest sale from Sep 28, 2026.

Against its sector (Technology, 85 companies with an insider page on this site), over the same dates the median is 22 sales and 0 purchases on the open market. Monolithic Power Systems has more sales than 73 of the other 84, ranks 9 of 85 by net dollars sold, and 32 of the 85 have at least one purchase.

The 20 most important trades

With no open-market purchases, the table starts with MPWR's sales, largest first. The full history is in the tool above, already searched.

See all 102 MPWR trades in the full history →

Trade date	Filed	Insider	Role	Amount	Code	Filing
2026-02-06	2026-02-10	Hsing Michael	CEO	$64.3M	S — Open-market sale Form 4 footnote F1 The reported sales were to cover taxes upon the release of restricted stock units, as required by the Company's equity incentive plan.	SEC
2026-05-18	2026-05-20	Hsing Michael	CEO	$59.3M	S — Open-market sale 14 Form 4 footnotes F2 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,459.96 to $1,464.86. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F1 Ending balance includes 29 shares acquired on February 17, 2026 through the Company's qualified ESPP program. F3 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,464.97 to $1,469.94. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F4 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,469.95 to $1,474.94. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F5 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,474.95 to $1,479.85. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F6 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,479.99 to $1,484.93. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F7 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,484.95 to $1,489.73. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F8 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,490.17 to $1,494.10. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F9 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $,1495.74 to $1,500.72. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F10 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,500.75 to $1,505.70. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F11 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,505.70 to $1,510.67. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F12 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,510.68 to $1,515.44. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F13 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,516.26 to $1,519.25. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F14 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,521.33 to $1,521.56. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.	SEC
2026-05-06	2026-05-08	Xiao Deming	EVP, Global Operations	$49.6M	S — Open-market sale 5 Form 4 footnotes F2 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,645.48 to $1,650.43. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F1 Ending balance includes 27 shares acquired on February 17, 2026 through the Company's qualified ESPP program. F3 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,650.75 to $1,655.75. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F4 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,655.80 to $1,660.72. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F5 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,660.99 to $1,662 The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.	SEC
2026-09-28	2026-09-30	Hsing Michael	CEO	$40.3M	S — Open-market sale (scheduled 10b5-1) 10 Form 4 footnotes F1 These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 05/29/2026. F3 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,320.64 to $1,325.61. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F2 Ending balance includes 1 share acquired on August 17, 2026, through the Company's qualified ESPP program. F4 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,325.65 to $1,330.62. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F5 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,330.65 to $1,335.51. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F6 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,335.68 to $1,340.66. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F7 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,340.69 to $1,345.65. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F8 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,345.66 to $1,350.47. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F9 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,350.84 to $1,355.11. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F10 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,356.78 to $1,357.00. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.	SEC
2026-02-11	2026-02-13	Hsing Michael	CEO	$39.2M	S — Open-market sale (scheduled 10b5-1) 11 Form 4 footnotes F1 These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 8/25/2025. F2 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,155.64 to $1,160.62 The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F3 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,160.70 to $1,165.64 The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F4 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,166.00 to $1,169.96. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F5 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,170.10 to $1,175.09. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F6 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,175.27 to $1,180.19. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F7 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,180.29 to $1,185.29. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F8 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,185.33 to $1,190.26. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F9 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,190.39 to $1,195.37. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F10 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,195.44 to $1,200.37. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F11 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,200.46 to $1,203.86. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.	SEC
2026-02-10	2026-02-12	Hsing Michael	CEO	$38.8M	S — Open-market sale (scheduled 10b5-1) 9 Form 4 footnotes F1 These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 08/28/2025. F2 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,128.88 to $1,133.86. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F3 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,133.92 to $1,138.90. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F4 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,138.96 to $1,143.96. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F5 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,144.03 to $1,149.00. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F6 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,149.04 to $1,154.00. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F7 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,154.09 to $1,155.86. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F8 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,159.96 to $1,163.96. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F9 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,172.65 to $1,177.08. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.	SEC
2026-02-12	2026-02-17	Hsing Michael	CEO	$38.7M	S — Open-market sale (scheduled 10b5-1) 13 Form 4 footnotes F1 These transactions were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 08/28/2025. F2 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,152.31 to $1,157.31. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F3 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,157.38 to $1,162.38. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F4 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,162.42 to $1,167.20 The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F5 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,167.43 to $1,172.17. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F6 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,172.82 to $1,175.07. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F7 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,179.43 to $1,182.24. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F8 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,185.94 to $1,190.48. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F9 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,191.26 to $1,195.35. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F10 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,197.57 to $1,202.33. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F11 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,202.70 to $1,207.63. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F12 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,207.93 to $1,212.36. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F13 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,214.09 to $1,218.82. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.	SEC
2025-11-11	2025-11-13	Hsing Michael	CEO	$38.3M	S — Open-market sale 16 Form 4 footnotes F1 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $952.05 to $952.98. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F2 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $953.14 to $953.99. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F3 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $954.00 to $954.98. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F4 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $955.13 to $955.93. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F5 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $956.00 to $956.98. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F6 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $957.00 to $957.99. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F7 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $958.13 to $958.99. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F8 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $959.00 to $959.95. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F9 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $960.00 to $960.99. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F10 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $961.00 to $961.95. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F11 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $962.00 to $962.97. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F12 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $963.08 to $963.99. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F13 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $964.00 to $964.77. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F14 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $965.36 to $965.63. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F15 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $966.06 to $966.80. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F16 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $967.14 to $967.17. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.	SEC
2025-11-12	2025-11-13	Hsing Michael	CEO	$35.7M	S — Open-market sale 19 Form 4 footnotes F1 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $957.18 to $957.95. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F2 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $958.06 to $958.88. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F3 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $959.01 to $959.56. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F4 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $960.00 to $960.74. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F5 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $961.07 to $961.98. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F6 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $962.02 to $962.99. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F7 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $963.00 to $963.99. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F8 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $964.00 to $964.92. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F9 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $965.00 to $965.98. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F10 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $966.00 to $ 966.99. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F11 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $967.00 to $967.93. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F12 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $968.01 to $968.94. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F13 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $969.14 to $969.98. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F14 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $970.02 to $970.85. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F15 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $971.74 to $971.96. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F16 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $972.05 to $972.98. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F17 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $973.45 to $973.84. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F18 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $979.59 to $979.60. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F19 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $980.00 to $980.25. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.	SEC
2026-02-06	2026-02-10	Sciammas Maurice	EVP, WW Sales & Marketing	$26.8M	S — Open-market sale Form 4 footnote F1 The reported sales were to cover taxes upon the release of restricted stock units, as required by the Company's equity incentive plan.	SEC
2026-02-06	2026-02-10	Tseng Saria	EVP & General Counsel	$26.8M	S — Open-market sale Form 4 footnote F1 The reported sales were to cover taxes upon the release of restricted stock units, as required by the Company's equity incentive plan.	SEC
2026-02-06	2026-02-10	Xiao Deming	EVP, Global Operations	$26.8M	S — Open-market sale Form 4 footnote F1 The reported sales were to cover taxes upon the release of restricted stock units, as required by the Company's equity incentive plan.	SEC
2026-03-30	2026-04-01	Tseng Saria	EVP & General Counsel	$25.9M	S — Open-market sale (scheduled 10b5-1) 10 Form 4 footnotes F1 These transactions were made pursuant to a Rule 10b5-1 trading plan adopted on 11/28/2025. F2 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $998.36 to $1,002.92. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F3 Ending balance includes 30 shares acquired on February 17, 2026 through the Company's qualified ESPP program. F4 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,003.06 to $1,007.85. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F5 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,008.00 to $1,012.65. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F6 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,013.83 to $1,018.85. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F7 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,020.71 to $1,025.36. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F8 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,027.37 to $1,032.40. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F9 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,033.98 to $1,037.25. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F10 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,039.30 to $1,042.50. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.	SEC
2026-02-06	2026-02-10	Blegen Theodore	EVP and CFO	$25.4M	S — Open-market sale Form 4 footnote F1 The reported sales were to cover taxes upon the release of restricted stock units, as required by the Company's equity incentive plan.	SEC
2025-11-19	2025-11-20	Sciammas Maurice	EVP, WW Sales & Marketing	$24.7M	S — Open-market sale 12 Form 4 footnotes F1 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $875.01 to $875.95. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F2 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $876.28 to $876.97. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F3 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $877.00 to $877.97. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F4 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $878.00 to $878.97. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F5 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $879.25 to $879.99. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F6 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $880.07 to $880.94. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F7 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $881.01 to $881.93. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F8 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $882.06 to $882.92. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F9 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $883.00 to $883.93. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F10 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $884.00 to $884.69. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F11 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $885.00 to $885.99. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F12 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $886.00 to $886.15. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.	SEC
2026-07-15	2026-07-17	Sciammas Maurice	EVP, WW Sales & Marketing	$20.2M	S — Open-market sale (scheduled 10b5-1) 19 Form 4 footnotes F1 This transaction was made pursuant to a Rule 10b5-1 trading plan adopted on 11/24/2025. F2 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,311.45 to $1,316.40 The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F3 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,316.56 to $1,321.56. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F4 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,321.72 to $1,326.11. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F5 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,326.94 to $1,331.90. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F6 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,331.95 to $1,336.95. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F7 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,336.97 to $1,341.96. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F8 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,341.99 to $1,346.96. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F9 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,347.09 to $1,352.00. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F10 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,352.13 to $1,357.03. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F11 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,357.88 to $1,362.57. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F12 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,366.15 to $1,371.04. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F13 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,371.23 to $1,376.20. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F14 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,376.51 to $1,381.11. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F15 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,381.79 to $1,386.22. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F16 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,388.18 to $1,388.22. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F17 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,393.94 to $1,398.92. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F18 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,398.97 to $1,400.85. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F19 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,404.25 to $1,406.04. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.	SEC
2026-05-06	2026-05-08	Elmiger Eugen J	Director	$19.0M	S — Open-market sale 9 Form 4 footnotes F1 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,557.08 to $1,561.97. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F2 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,563.39 to $1,568.28. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F3 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,568.78 to $1,573.40. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F4 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,573.86 to $1,578.73. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F5 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,578.85 to $1,583.66. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F6 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,583.79 to $1,588.65. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F7 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,588.80 to $1,593.63. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F8 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,593.95 to $1,598.78. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F9 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,598.99 to $1,602.68 The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.	SEC
2026-05-15	2026-05-19	Sciammas Maurice	EVP, WW Sales & Marketing	$18.7M	S — Open-market sale (scheduled 10b5-1) 9 Form 4 footnotes F1 This transaction was made pursuant to a Rule 10b5-1 trading plan adopted on 11/24/2025. F2 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,549.62 to $1,554.55. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F3 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,554.59 to $1,559.37. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F4 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,559.61 to $1,564.59. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F5 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,564.75 to $1,569.67. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F6 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,569.78 to $1,574.53. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F7 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,574.9 to $1,579.7. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F8 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,579.97 to $1,584.43. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F9 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $1,585.17 to $1,586.76. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.	SEC
2025-11-26	2025-11-28	Tseng Saria	EVP & General Counsel	$18.5M	S — Open-market sale 9 Form 4 footnotes F1 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $922.42 to $922.94. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F2 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $923.11 to $923.98. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F3 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $924.00 to $924.83. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F4 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $925.18 to $925.82. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F5 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $926.00 to $926.63. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F6 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $927.01 to $927.86. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F7 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $928.40 to $928.98. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F8 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $929.00 to $929.72. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F9 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $930.01 to $930.98. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.	SEC
2025-11-25	2025-11-28	Tseng Saria	EVP & General Counsel	$18.1M	S — Open-market sale 19 Form 4 footnotes F1 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $894.17 to $894.81. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F2 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $895.14 to $895.89. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F3 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $896.01 to $896.98. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F4 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $897.32 to $897.83. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F5 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $898.05 to $898.56. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F6 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $899.01 to $899.90. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F7 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $900.02 to $900.90. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F8 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $901.22 to $901.94. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F9 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $902.01 to $902.14. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F10 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $903.36 to $903.72. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F11 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $904.12 to $904.81. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F12 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $905.07 to $905.53. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F13 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $906.14 to $906.67. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F14 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $907.20 to $907.73. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F15 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $908.02 to $908.89. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F16 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $909.02 to $909.74. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F17 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $910.01 to $910.96. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F18 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $911.85 to $911.95. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price. F19 The price is the weighted average sale price for the transactions reported on this line. The prices for the transactions reported on this line range from $912.12 to $912.48. The reporting person undertakes to provide, upon request by the staff of the Securities and Exchange Commission, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price.	SEC

The period balance: money in, money out

In the Form 4 filings submitted between Aug 28, 2025 and Sep 30, 2026 there is not one open-market purchase of Monolithic Power Systems, Inc.: 65 sales worth $769.6M and zero dollars bought.

Only codes P and S count, where an insider puts in or takes out their own money. A selling balance like Monolithic Power Systems, Inc.'s is the norm in the S&P 500, where much of the pay comes as stock. It is not a recommendation to buy or sell: it is what was filed.

Every transaction, code by code

Code	What it means	Trades	Reported amount
S	Open-market sale	65	$769.6M
A	Grant or award	17	$0
G	Gift	13	$0
F	Tax withholding (shares surrendered for taxes)	5	$366.1M
J	Other transaction (explained in the filing)	2	$0
Total	Everything filed in the period	102	$1.14B

32 of the 102 rows carry no usable amount on the Form 4: they count as trades and add $0. The code labels come from the SEC index.

Who has traded

Over the 15 months of history, 12 distinct people or entities have filed Monolithic Power Systems, Inc. transactions: none bought on the open market and 12 sold. Counted by CIK, the fixed number the SEC gives each filer, and not by name, which each filer types their own way.

Of the 12 who sold on the open market (65 sales in all), the three biggest sellers account for $620.3M of the $769.6M: 81% of the money in three people.

Filer	Role	Transactions	Bought (count)	Sold (count)	Last filed
Hsing Michael	CEO	12	—	$354.8M (8)	2026-09-30
Tseng Saria	EVP & General Counsel	21	—	$164.2M (13)	2026-09-02
Sciammas Maurice	EVP, WW Sales & Marketing	25	—	$101.4M (15)	2026-08-06
Xiao Deming	EVP, Global Operations	5	—	$76.4M (2)	2026-05-08
Blegen Theodore	EVP and CFO	10	—	$42.6M (7)	2026-02-10
Elmiger Eugen J	Director	3	—	$22.4M (2)	2026-05-08
Zhou Jeff	Director	5	—	$3.4M (4)	2026-05-27
Lee Victor K	Director	4	—	$2.0M (3)	2026-02-11

Shown here are the 8 who moved the most money, out of 12. The rest are in the full history, one link above. The name links to all their trades, in any company. "Transactions" counts any code; the money, open market only. Role: from their latest filing.

Month by month

By the month the trade was executed, not the month it was filed; months with no trades show zero. The busiest month was May 2026: 0 purchases and 14 sales, worth $172.0M. 1 of the 15 months have none.

Month	Amount	Sales	Amount
Aug 2025	$0	2	$3.6M
Sep 2025	$0	3	$17.0M
Oct 2025	$0	4	$21.3M
Nov 2025	$0	11	$148.5M
Dec 2025	$0	2	$3.7M
Jan 2026	$0	2	$3.4M
Feb 2026	$0	11	$291.0M
Mar 2026	$0	2	$26.0M
Apr 2026	$0	4	$22.2M
May 2026	$0	14	$172.0M
Jun 2026	$0	1	$46k
Jul 2026	$0	2	$20.3M
Aug 2026	$0	6	$367k
Sep 2026	$0	1	$40.3M
Oct 2026	$0	0	$0

The last month may be partial: a Form 4 is filed up to two business days later. The table does not say whether the pattern is good or bad; it says when it happened.

Monolithic Power Systems, Inc. (MPWR) analysis page →

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How to read this data

7 of the 20 sales in the table are flagged as scheduled (10b5-1 plan): signed months ahead and executed automatically, so they say nothing about what the insider thinks today. Monolithic Power Systems has no open-market purchase (code P) in the history, the most common case in the S&P 500: insiders are already paid in stock. The latest filing is from Sep 30, 2026, and a Form 4 arrives up to two business days after the trade.

20 of the 20 rows in the table carry footnotes from the Form 4 itself, folded into the code column and copied verbatim; a row with no footnote means the filing has none.

Guide: Insider buying · all guides

What is behind these trades

The concepts on this page, explained from scratch in the Academy. Free, no account.

What the efficiency hypothesis says and what it does NOT sayIf an insider's purchase is public and anyone can read it, is there any information left in it? That is the exact question that brings people here.
Who really moves the market: the types of investorWho sits on the other side of each order, and where a company's own insiders fit among them.
Supply, demand and price: why it rises and falls constantlyHow a piece of news ends up inside the price, and why the reaction to a filed sale is rarely the one you would expect.

The whole Academy, course by course →

Source: SEC EDGAR Form 4. This is a list of public facts, not financial advice or a recommendation to buy or sell.

Monolithic Power Systems (MPWR) insider buying and selling

Monolithic Power Systems, Inc. (MPWR) insider buying and selling: no purchases, 65 sales

Monolithic Power Systems insider buying and selling over the last 12 months

The 20 most important trades

The period balance: money in, money out

Every transaction, code by code

Who has traded

Month by month

Other Technology companies with insider trades

How to read this data

What is behind these trades

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