Synopsys (SNPS) 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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Synopsys, Inc. (SNPS) insider buying and selling: 1 purchase, 17 sales
103 Form 4 Table I transactions filed with the SEC by Synopsys, Inc. insiders between 2025-09-03 and 2026-10-16 (15-month history): 1 open-market purchase and 17 sales, plus 85 transactions under other Form 4 codes, broken down one by one below. The largest open-market trade is a sale of $11.1M by De Geus Aart on 2026-08-28.
Synopsys insider buying and selling over the last 12 months
Between Oct 21, 2025 and Oct 20, 2026, Synopsys insiders filed 13 sales worth $61.5M on the open market, and no purchases.
The biggest seller was De Geus Aart (EXECUTIVE CHAIR): $32.5M in 3 sales, out of 5 different sellers.
The largest trade of the period was a sale of $11.1M on Aug 28, 2026, by De Geus Aart (EXECUTIVE CHAIR), under a 10b5-1 plan. Form 4 on sec.gov (0001249802-26-000008).
Of the 13 sales, 10 (77%, $54.9M) carry the 10b5-1 plan flag on the Form 4, meaning they were scheduled months ahead; the other 3 do not.
The last three months show 8 sales, against 2 in the three before. The latest sale from Oct 15, 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. Synopsys has more sales than 27 of the other 84, ranks 40 of 85 by net dollars sold, and 32 of the 85 have at least one purchase.
The 20 most important trades
The only open-market purchase first, then the rest, each type from largest to smallest. The full history is in the tool above, already searched.
See all 103 SNPS trades in the full history →
| Trade date | Filed | Insider | Role | Amount | Code | Filing |
|---|---|---|---|---|---|---|
| 2025-09-11 | 2025-09-15 | Painter Robert G | Director | $149k | P — Open-market purchase | SEC |
| 2026-08-28 | 2026-08-31 | De Geus Aart | EXECUTIVE CHAIR | $11.1M | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF1 Represents a weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from $440.985 to $461.850. The Reporting Person has provided to the Issuer, and undertakes to provide to the staff of the Securities and Exchange Commission or any security holder of the Issuer, upon request, full information regarding the number of shares purchased at each separate price within the range. | SEC |
| 2026-08-31 | 2026-09-02 | De Geus Aart | EXECUTIVE CHAIR | $11.0M | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF1 Represents a weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from $435.88 to $445.70. The Reporting Person has provided to the Issuer, and undertakes to provide to the staff of the Securities and Exchange Commission or any security holder of the Issuer, upon request, full information regarding the number of shares purchased at each separate price within the range. | SEC |
| 2026-09-01 | 2026-09-02 | De Geus Aart | EXECUTIVE CHAIR | $10.3M | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF3 Represents a weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from $413.99 to $430.26. The Reporting Person has provided to the Issuer, and undertakes to provide to the staff of the Securities and Exchange Commission or any security holder of the Issuer, upon request, full information regarding the number of shares purchased at each separate price within the range. | SEC |
| 2026-10-15 | 2026-10-16 | Ghazi Sassine | PRESIDENT AND CEO | $6.8M | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF1 Represents a weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from $455.060 to $471.325. The Reporting Person has provided to the Issuer, and undertakes to provide to the staff of the Securities and Exchange Commission or any security holder of the Issuer, upon request, full information regarding the number of shares purchased at each separate price within the range. | SEC |
| 2026-06-15 | 2026-06-16 | Ghazi Sassine | PRESIDENT AND CEO | $6.7M | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF1 Represents a weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from $454.56 to $462.99. The Reporting Person has provided to the Issuer, and undertakes to provide to the staff of the Securities and Exchange Commission or any security holder of the Issuer, upon request, full information regarding the number of shares purchased at each separate price within the range. | SEC |
| 2025-09-02 | 2025-09-03 | Ghazi Sassine | PRESIDENT AND CEO | $6.7M | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF2 Represents a weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from $585.19 to $591.265. The Reporting Person has provided to the Issuer, and undertakes to provide to the staff of the Securities and Exchange Commission or any security holder of the Issuer, upon request, full information regarding the number of shares purchased at each separate price within the range. | SEC |
| 2026-09-15 | 2026-09-16 | Ghazi Sassine | PRESIDENT AND CEO | $5.5M | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF1 Represents a weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from $371.995 to $379.990. The Reporting Person has provided to the Issuer, and undertakes to provide to the staff of the Securities and Exchange Commission or any security holder of the Issuer, upon request, full information regarding the number of shares purchased at each separate price within the range. | SEC |
| 2025-09-22 | 2025-09-23 | Kankanwadi Sudhindra | Chief Accounting Officer | $4.9M | S — Open-market saleForm 4 footnoteF1 Represents a weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from $500.90 to $501.04. The Reporting Person has provided to the Issuer, and undertakes to provide to the staff of the Securities and Exchange Commission or any security holder of the Issuer, upon request, full information regarding the number of shares purchased at each separate price within the range. | SEC |
| 2026-10-06 | 2026-10-06 | Kankanwadi Sudhindra | Deputy CFO & CAO | $4.6M | S — Open-market sale | SEC |
| 2025-09-19 | 2025-09-23 | Kankanwadi Sudhindra | Chief Accounting Officer | $2.9M | S — Open-market sale | SEC |
| 2025-09-05 | 2025-09-09 | Glaser Shelagh | CFO | $2.2M | S — Open-market sale (scheduled 10b5-1) | SEC |
| 2025-12-19 | 2025-12-22 | Glaser Shelagh | CFO | $1.7M | S — Open-market sale (scheduled 10b5-1) | SEC |
| 2026-06-12 | 2026-06-15 | Glaser Shelagh | CFO | $1.5M | S — Open-market sale (scheduled 10b5-1) Indirect holding, through: by Trust 3 Form 4 footnotesF1 The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan that was adopted January 13, 2026. F2 Represents a weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from $450.00 to $457.95. The Reporting Person has provided to the Issuer, and undertakes to provide to the staff of the Securities and Exchange Commission or any security holder of the Issuer, upon request, full information regarding the number of shares purchased at each separate price within the range. F3 The reporting person transferred 17,752 shares into the Karl and Shelagh Glaser Revocable Trust. The Transfer is exempt from Section 16 by virtue of Rule 16a-13. The shares are indirectly held by the reporting person through the Karl and Shelagh Glaser Revocable Trust. | SEC |
| 2026-10-05 | 2026-10-06 | Kankanwadi Sudhindra | Deputy CFO & CAO | $1.5M | S — Open-market sale | SEC |
| 2026-10-06 | 2026-10-07 | Lee Janet | GC & Corporate Secretary | $575k | S — Open-market saleForm 4 footnoteF1 Represents a weighted average sale price per share. These shares were sold in multiple transactions at prices ranging from $502.57 to $502.64. The Reporting Person has provided to the Issuer, and undertakes to provide to the staff of the Securities and Exchange Commission or any security holder of the Issuer, upon request, full information regarding the number of shares purchased at each separate price within the range. | SEC |
| 2026-01-12 | 2026-01-13 | Lee Janet | GC & Corporate Secretary | $133k | S — Open-market sale (scheduled 10b5-1) | SEC |
| 2026-01-07 | 2026-01-08 | Lee Janet | GC & Corporate Secretary | $128k | S — Open-market sale (scheduled 10b5-1) | SEC |
| 2026-08-31 | 2026-09-02 | De Geus Aart | EXECUTIVE CHAIR | $3.4M | M — Option exercise (scheduled 10b5-1) | SEC |
| 2026-08-28 | 2026-08-31 | De Geus Aart | EXECUTIVE CHAIR | $3.4M | M — Option exercise (scheduled 10b5-1) | SEC |
The period balance: money in, money out
Across the Form 4 filings submitted between Sep 3, 2025 and Oct 16, 2026, Synopsys, Inc. open-market activity adds up to 1 purchase worth $149k and 17 sales worth $78.3M. The net balance is $78.2M on the sell side.
Only codes P and S count, where an insider puts in or takes out their own money. A selling balance like Synopsys, 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 | 38 | $22.8M |
| F | Tax withholding (shares surrendered for taxes) | 26 | $9.5M |
| S | Open-market sale | 17 | $78.3M |
| A | Grant or award | 12 | $0 |
| J | Other transaction (explained in the filing) | 9 | $86k |
| P | Open-market purchase | 1 | $149k |
| Total | Everything filed in the period | 103 | $110.7M |
37 of the 103 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, 17 distinct people or entities have filed Synopsys, Inc. transactions: 1 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 |
|---|---|---|---|---|---|
| De Geus Aart | EXECUTIVE CHAIR | 14 | — | $32.5M (3) | 2026-09-02 |
| Ghazi Sassine | PRESIDENT AND CEO | 15 | — | $25.6M (4) | 2026-10-16 |
| Kankanwadi Sudhindra | Deputy CFO & CAO | 16 | — | $13.9M (4) | 2026-10-06 |
| Glaser Shelagh | CFO | 12 | — | $5.4M (3) | 2026-06-16 |
| Lee Janet | GC & Corporate Secretary | 29 | — | $835k (3) | 2026-10-07 |
| Painter Robert G | Director | 2 | $149k (1) | — | 2026-04-17 |
| Ellow Michael | Chief Revenue Officer | 3 | — | — | 2026-09-02 |
| Shimer Peter A | Director | 2 | — | — | 2026-04-17 |
Shown here are the 8 who moved the most money, out of 17. 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 2025: 1 purchase and 4 sales, worth $16.9M. 8 of the 15 months have none.
| Month | Purchases | Amount | Sales | Amount |
|---|---|---|---|---|
| Aug 2025 | 0 | $0 | 0 | $0 |
| Sep 2025 | 1 | $149k | 4 | $16.8M |
| Oct 2025 | 0 | $0 | 0 | $0 |
| Nov 2025 | 0 | $0 | 0 | $0 |
| Dec 2025 | 0 | $0 | 1 | $1.7M |
| Jan 2026 | 0 | $0 | 2 | $260k |
| 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 | 2 | $8.2M |
| Jul 2026 | 0 | $0 | 0 | $0 |
| Aug 2026 | 0 | $0 | 2 | $22.2M |
| Sep 2026 | 0 | $0 | 2 | $15.8M |
| Oct 2026 | 0 | $0 | 4 | $13.4M |
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.
Synopsys, Inc. (SNPS) analysis page →
Other Technology companies with insider trades
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How to read this data
12 of the 17 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. Synopsys's single open-market purchase (code P) is the rare signal: insiders are already paid in stock, so buying more means putting in their own money. The latest filing is from Oct 16, 2026, and a Form 4 arrives up to two business days after the trade.
10 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.