Super Micro Computer (SMCI) insider buying and selling
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.
| Date | Ticker | Insider | Role | Shares | Price | Amount | % of stake | Type / filing |
|---|
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Super Micro Computer, Inc. (SMCI) insider buying and selling: no purchases, 11 sales
134 Form 4 Table I transactions filed with the SEC by Super Micro Computer, Inc. insiders between 2025-08-26 and 2026-10-09 (15-month history): 0 open-market purchases and 11 sales, plus 123 transactions under other Form 4 codes, broken down one by one below. The largest open-market trade is a sale of $4.5M by Liu Liang Chiu-Chu Sara on 2026-10-07.
Super Micro Computer insider buying and selling over the last 12 months
Between Oct 21, 2025 and Oct 20, 2026, Super Micro Computer insiders filed 8 sales worth $27.9M on the open market, and no purchases.
The biggest seller was Liu Liang Chiu-Chu Sara (Director): $12.2M in 3 sales, out of 4 different sellers.
The largest trade of the period was a sale of $4.5M on Oct 7, 2026, by Liu Liang Chiu-Chu Sara (Director), under a 10b5-1 plan. Form 4 on sec.gov (0001392941-26-000015).
Of the 8 sales, 6 (75%, $24.4M) carry the 10b5-1 plan flag on the Form 4, meaning they were scheduled months ahead; the other 2 do not.
The last three months show 6 sales, against 0 in the three before. The latest sale from Oct 7, 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. Super Micro Computer has more sales than 19 of the other 84, ranks 49 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 SMCI's sales, largest first. The full history is in the tool above, already searched.
See all 134 SMCI trades in the full history →
| Trade date | Filed | Insider | Role | Amount | Code | Filing |
|---|---|---|---|---|---|---|
| 2026-10-07 | 2026-10-09 | Liu Liang Chiu-Chu Sara | Director | $4.5M | S — Open-market sale (scheduled 10b5-1)2 Form 4 footnotesF1 The broker-assisted sales transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 26, 2026 during the Company's open window period (the "Trading Plan"). F2 The price reported here is a weighted average price. The shares were sold in multiple transactions at prices ranging from $45.00 to $45.06, inclusive. The Reporting Person undertakes to provide to Super Micro Computer, Inc., any security holder of Super Micro Computer, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. | SEC |
| 2026-10-07 | 2026-10-09 | Liang Charles | President and CEO | $4.5M | S — Open-market sale (scheduled 10b5-1) Indirect holding, through: By Spouse 2 Form 4 footnotesF1 The broker-assisted sales transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person's spouse on May 26, 2026 during the Company's open window period (the "Trading Plan"). F2 The price reported here is a weighted average price. The shares were sold in multiple transactions at prices ranging from $45.00 to $45.06, inclusive. The Reporting Person's spouse undertakes to provide to Super Micro Computer, Inc., any security holder of Super Micro Computer, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. | SEC |
| 2026-09-04 | 2026-09-08 | Liu Liang Chiu-Chu Sara | Director | $4.0M | S — Open-market sale (scheduled 10b5-1)2 Form 4 footnotesF1 The broker-assisted sales transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 26, 2026 during the Company's open window period (the "Trading Plan"). F4 The price reported here is a weighted average price. The shares were sold in multiple transactions at prices ranging from $40.00 to $40.01, inclusive. The Reporting Person undertakes to provide to Super Micro Computer, Inc., any security holder of Super Micro Computer, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. | SEC |
| 2026-09-04 | 2026-09-08 | Liang Charles | President and CEO | $4.0M | S — Open-market sale (scheduled 10b5-1) Indirect holding, through: By Spouse 2 Form 4 footnotesF1 The broker-assisted sales transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person's spouse on May 26, 2026 during the Company's open window period (the "Trading Plan"). F4 The price reported here is a weighted average price. The shares were sold in multiple transactions at prices ranging from $40.00 to $40.01, inclusive. The Reporting Person's spouse undertakes to provide to Super Micro Computer, Inc., any security holder of Super Micro Computer, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. | SEC |
| 2026-09-03 | 2026-09-08 | Liu Liang Chiu-Chu Sara | Director | $3.7M | S — Open-market sale (scheduled 10b5-1)3 Form 4 footnotesF1 The broker-assisted sales transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 26, 2026 during the Company's open window period (the "Trading Plan"). F2 The price reported here is a weighted average price. The shares were sold in multiple transactions at prices ranging from $36.00 to $36.99, inclusive. The Reporting Person undertakes to provide to Super Micro Computer, Inc., any security holder of Super Micro Computer, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F3 The price reported here is a weighted average price. The shares were sold in multiple transactions at prices ranging from $37.125 to $38.025, inclusive. The Reporting Person undertakes to provide to Super Micro Computer, Inc., any security holder of Super Micro Computer, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. | SEC |
| 2026-09-03 | 2026-09-08 | Liang Charles | President and CEO | $3.7M | S — Open-market sale (scheduled 10b5-1) Indirect holding, through: By Spouse 3 Form 4 footnotesF1 The broker-assisted sales transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person's spouse on May 26, 2026 during the Company's open window period (the "Trading Plan"). F2 The price reported here is a weighted average price. The shares were sold in multiple transactions at prices ranging from $36.00 to $36.99, inclusive. The Reporting Person's spouse undertakes to provide to Super Micro Computer, Inc., any security holder of Super Micro Computer, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F3 The price reported here is a weighted average price. The shares were sold in multiple transactions at prices ranging from $37.125 to $38.025, inclusive. The Reporting Person's spouse undertakes to provide to Super Micro Computer, Inc., any security holder of Super Micro Computer, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price | SEC |
| 2025-11-24 | 2025-11-26 | Kao George | SVP, OPERATIONS | $1.9M | S — Open-market saleForm 4 footnoteF1 The price reported here is a weighted average price. The shares were sold in multiple transactions at prices ranging from $32.830 to $32.845, inclusive. The Reporting Person undertakes to provide to Super Micro Computer, Inc., any security holder of Super Micro Computer, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. | SEC |
| 2025-08-22 | 2025-08-26 | Kao George | SVP, OPERATIONS | $1.8M | S — Open-market saleForm 4 footnoteF1 The price reported here is a weighted average price. The shares were sold in multiple transactions at prices ranging from $43.86 to $43.92, inclusive. The Reporting Person undertakes to provide to Super Micro Computer, Inc., any security holder of Super Micro Computer, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. | SEC |
| 2025-11-26 | 2025-12-01 | Tuan Sherman | Director | $1.6M | S — Open-market sale | SEC |
| 2025-09-15 | 2025-09-17 | Weigand David E | SVP, Chief Financial Officer | $1.1M | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF1 The stock option exercises and broker-assisted sales transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 30, 2025 during the Company's open window period (the "Trading Plan"). | SEC |
| 2025-09-03 | 2025-09-05 | Weigand David E | SVP, Chief Financial Officer | $1.0M | S — Open-market sale (scheduled 10b5-1)3 Form 4 footnotesF1 The stock option exercises and broker-assisted sales transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 30, 2025 during the Company's open window period (the "Trading Plan"). F2 The price reported here is a weighted average price. The shares were sold in multiple transactions at prices ranging from $39.79 to $40.76, inclusive. The Reporting Person undertakes to provide to Super Micro Computer, Inc., any security holder of Super Micro Computer, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. F3 The price reported here is a weighted average price. The shares were sold in multiple transactions at prices ranging from $40.80 to $40.90, inclusive. The Reporting Person undertakes to provide to Super Micro Computer, Inc., any security holder of Super Micro Computer, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. | SEC |
| 2025-11-24 | 2025-11-26 | Kao George | SVP, OPERATIONS | $574k | M — Option exercise | SEC |
| 2025-10-30 | 2025-11-03 | Weigand David E | SVP, Chief Financial Officer | $333k | F — Tax withholding (shares surrendered for taxes)Form 4 footnoteF2 Represents shares of SMCI common stock that have been withheld by SMCI to satisfy tax withholding and remittance obligations in connection with the net settlement of vested restricted stock units and not a market transaction. Transaction exempt from Section 16(b) of the Securities Exchange Act of 1934 (the "Act") pursuant to Rule 16b-3(e) promulgated under the Act. | SEC |
| 2026-07-01 | 2026-07-02 | Weigand David E | SVP, Chief Financial Officer | $278k | F — Tax withholding (shares surrendered for taxes)Form 4 footnoteF2 Represents shares of SMCI common stock that have been withheld by SMCI to satisfy tax withholding and remittance obligations in connection with the net settlement of vested restricted stock units and not a market transaction. Transaction exempt from Section 16(b) of the Securities Exchange Act of 1934 (the "Act") pursuant to Rule 16b-3(e) promulgated under the Act. | SEC |
| 2025-11-13 | 2025-11-17 | Kao George | SVP, OPERATIONS | $276k | M — Option exercise | SEC |
| 2025-11-10 | 2025-11-12 | Liaw Yih-Shyan Wally | Director | $248k | F — Tax withholding (shares surrendered for taxes)Form 4 footnoteF2 Represents shares of SMCI common stock that have been withheld by SMCI to satisfy tax withholding and remittance obligations in connection with the net settlement of vested restricted stock units and not a market transaction. Transaction exempt from Section 16(b) of the Securities Exchange Act of 1934 (the "Act") pursuant to Rule 16b-3(e) promulgated under the Act. | SEC |
| 2025-10-30 | 2025-11-03 | Liu Liang Chiu-Chu Sara | Director | $163k | F — Tax withholding (shares surrendered for taxes)Form 4 footnoteF2 Represents shares of SMCI common stock that have been withheld by SMCI to satisfy tax withholding and remittance obligations in connection with the net settlement of vested restricted stock units and not a market transaction. Transaction exempt from Section 16(b) of the Securities Exchange Act of 1934 (the "Act") pursuant to Rule 16b-3(e) promulgated under the Act. | SEC |
| 2025-10-30 | 2025-11-03 | Liang Charles | President and CEO | $163k | F — Tax withholding (shares surrendered for taxes) Indirect holding, through: By Spouse Form 4 footnoteF2 Represents shares of SMCI common stock that have been withheld by SMCI to satisfy tax withholding and remittance obligations in connection with the net settlement of vested restricted stock units and not a market transaction. Transaction exempt from Section 16(b) of the Securities Exchange Act of 1934 (the "Act") pursuant to Rule 16b-3(e) promulgated under the Act. | SEC |
| 2025-10-30 | 2025-11-03 | Clegg Don W | SVP, Worldwide Sales | $153k | F — Tax withholding (shares surrendered for taxes)Form 4 footnoteF2 Represents shares of SMCI common stock that have been withheld by SMCI to satisfy tax withholding and remittance obligations in connection with the net settlement of vested restricted stock units and not a market transaction. Transaction exempt from Section 16(b) of the Securities Exchange Act of 1934 (the "Act") pursuant to Rule 16b-3(e) promulgated under the Act. | SEC |
| 2025-09-15 | 2025-09-17 | Weigand David E | SVP, Chief Financial Officer | $133k | M — Option exercise (scheduled 10b5-1)Form 4 footnoteF1 The stock option exercises and broker-assisted sales transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 30, 2025 during the Company's open window period (the "Trading Plan"). | SEC |
The period balance: money in, money out
In the Form 4 filings submitted between Aug 26, 2025 and Oct 9, 2026 there is not one open-market purchase of Super Micro Computer, Inc.: 11 sales worth $31.8M 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 Super Micro Computer, 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 |
|---|---|---|---|
| M | Option exercise | 66 | $1.4M |
| F | Tax withholding (shares surrendered for taxes) | 53 | $4.1M |
| S | Open-market sale | 11 | $31.8M |
| G | Gift | 4 | $0 |
| Total | Everything filed in the period | 134 | $37.3M |
63 of the 134 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, 16 distinct people or entities have filed Super Micro Computer, Inc. transactions: none bought on the open market and 5 sold. Counted by CIK, the fixed number the SEC gives each filer, and not by name, which each filer types their own way.
| Filer | Role | Transactions | Bought (count) | Sold (count) | Last filed |
|---|---|---|---|---|---|
| Liang Charles | President and CEO | 22 | — | $12.2M (3) | 2026-10-09 |
| Liu Liang Chiu-Chu Sara | Director | 22 | — | $12.2M (3) | 2026-10-09 |
| Kao George | SVP, OPERATIONS | 9 | — | $3.6M (2) | 2025-11-26 |
| Weigand David E | SVP, Chief Financial Officer | 22 | — | $2.1M (2) | 2026-08-19 |
| Tuan Sherman | Director | 1 | — | $1.6M (1) | 2025-12-01 |
| Cheung Kenneth | SVP, Chief Accounting Officer | 12 | — | — | 2026-08-19 |
| Clegg Don W | SVP, Worldwide Sales | 10 | — | — | 2026-05-12 |
| Xiao Jin | Sr. Corporate VP, Engineering | 10 | — | — | 2026-08-19 |
Shown here are the 8 who moved the most money, out of 16. 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 Sep 2026: 0 purchases and 4 sales, worth $15.4M. 10 of the 15 months have none.
| Month | Purchases | Amount | Sales | Amount |
|---|---|---|---|---|
| Aug 2025 | 0 | $0 | 1 | $1.8M |
| Sep 2025 | 0 | $0 | 2 | $2.1M |
| Oct 2025 | 0 | $0 | 0 | $0 |
| Nov 2025 | 0 | $0 | 2 | $3.5M |
| Dec 2025 | 0 | $0 | 0 | $0 |
| Jan 2026 | 0 | $0 | 0 | $0 |
| Feb 2026 | 0 | $0 | 0 | $0 |
| Mar 2026 | 0 | $0 | 0 | $0 |
| Apr 2026 | 0 | $0 | 0 | $0 |
| May 2026 | 0 | $0 | 0 | $0 |
| Jun 2026 | 0 | $0 | 0 | $0 |
| Jul 2026 | 0 | $0 | 0 | $0 |
| Aug 2026 | 0 | $0 | 0 | $0 |
| Sep 2026 | 0 | $0 | 4 | $15.4M |
| Oct 2026 | 0 | $0 | 2 | $9.0M |
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.
Super Micro Computer, Inc. (SMCI) analysis page →
Other Technology companies with insider trades
All 500 are listed in the section index →
Which insiders are buying their own company stock →
How to read this data
8 of the 11 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. Super Micro Computer 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 Oct 9, 2026, and a Form 4 arrives up to two business days after the trade.
17 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.
Source: SEC EDGAR Form 4. This is a list of public facts, not financial advice or a recommendation to buy or sell.