Teradyne (TER) 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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Teradyne, Inc. (TER) insider buying and selling: no purchases, 38 sales
100 Form 4 Table I transactions filed with the SEC by Teradyne, Inc. insiders between 2025-09-09 and 2026-10-19 (15-month history): 0 open-market purchases and 38 sales, plus 62 transactions under other Form 4 codes, broken down one by one below. The largest open-market trade is a sale of $2.9M by Smith Gregory Stephen on 2026-05-15.
Teradyne insider buying and selling over the last 12 months
Between Oct 21, 2025 and Oct 20, 2026, Teradyne insiders filed 33 sales worth $15.8M on the open market, and no purchases.
The biggest seller was Smith Gregory Stephen (President and CEO): $10.9M in 8 sales, out of 6 different sellers.
The largest trade of the period was a sale of $2.9M on May 15, 2026, by Smith Gregory Stephen (President and CEO), under a 10b5-1 plan. Form 4 on sec.gov (0000904454-26-000306).
Of the 33 sales, 32 (97%, $15.6M) carry the 10b5-1 plan flag on the Form 4, meaning they were scheduled months ahead; the other one does not.
The last three months show 10 sales, against 12 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. Teradyne has more sales than 54 of the other 84, ranks 56 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 TER's sales, largest first. The full history is in the tool above, already searched.
See all 100 TER trades in the full history →
| Trade date | Filed | Insider | Role | Amount | Code | Filing |
|---|---|---|---|---|---|---|
| 2026-05-15 | 2026-05-19 | Smith Gregory Stephen | President and CEO | $2.9M | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF1 The reported transactions were effected pursuant to a sales plan adopted by the Reporting Person on February 12, 2026 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934. | SEC |
| 2026-08-17 | 2026-08-18 | Smith Gregory Stephen | President and CEO | $1.7M | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF1 The reported transactions were effected pursuant to a sales plan adopted by the Reporting Person on February 12, 2026 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934. | SEC |
| 2026-06-15 | 2026-06-16 | Smith Gregory Stephen | President and CEO | $1.7M | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF1 The reported transactions were effected pursuant to a sales plan adopted by the Reporting Person on February 12, 2026 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934. | SEC |
| 2026-07-15 | 2026-07-16 | Smith Gregory Stephen | President and CEO | $1.4M | S — Open-market sale (scheduled 10b5-1)2 Form 4 footnotesF1 The reported transactions were effected pursuant to a sales plan adopted by the Reporting Person on February 12, 2026 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934. F2 Includes 25.8346 shares acquired under the Issuer's Employee Stock Purchase Plan on June 30, 2026. | SEC |
| 2026-10-15 | 2026-10-19 | Smith Gregory Stephen | President and CEO | $1.4M | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF1 The reported transactions were effected pursuant to a sales plan adopted by the Reporting Person on February 12, 2026 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934. | SEC |
| 2026-09-15 | 2026-09-16 | Smith Gregory Stephen | President and CEO | $1.4M | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF1 The reported transactions were effected pursuant to a sales plan adopted by the Reporting Person on February 12, 2026 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934. | SEC |
| 2026-08-17 | 2026-08-18 | Matz Marilyn | Director | $510k | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF1 The reported transaction was effected pursuant to a sales plan adopted by the Reporting Person on February 13, 2026 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934. | SEC |
| 2026-06-15 | 2026-06-16 | Matz Marilyn | Director | $508k | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF1 The reported transaction was effected pursuant to a sales plan adopted by the Reporting Person on February 13, 2026 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934. | SEC |
| 2026-07-15 | 2026-07-16 | Matz Marilyn | Director | $428k | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF1 The reported transaction was effected pursuant to a sales plan adopted by the Reporting Person on February 13, 2026 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934. | SEC |
| 2026-05-21 | 2026-05-26 | Poulin Shannon John | President, Semiconductor Test | $348k | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF1 The reported transactions were effected pursuant to a sales plan adopted by the Reporting Person on February 19, 2026 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934. | SEC |
| 2026-10-15 | 2026-10-19 | Matz Marilyn | Director | $273k | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF1 The reported transaction was effected pursuant to a sales plan adopted by the Reporting Person on February 13, 2026 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934. | SEC |
| 2026-05-15 | 2026-05-19 | Matz Marilyn | Director | $271k | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF1 The reported transaction was effected pursuant to a sales plan adopted by the Reporting Person on February 13, 2026 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934. | SEC |
| 2026-09-15 | 2026-09-16 | Matz Marilyn | Director | $270k | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF1 The reported transaction was effected pursuant to a sales plan adopted by the Reporting Person on February 13, 2026 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934. | SEC |
| 2026-02-25 | 2026-02-27 | Mills Regan | President, Product Test | $262k | S — Open-market saleForm 4 footnoteF1 The shares were sold pursuant to a sales plan adopted by the Reporting Person on November 25, 2025 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934. | SEC |
| 2026-05-07 | 2026-05-11 | Driscoll Ryan | VP, General Counsel, Secretary | $257k | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF1 The shares were sold pursuant to a sales plan adopted by the Reporting Person on February 6, 2026 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934. | SEC |
| 2026-05-22 | 2026-05-26 | Poulin Shannon John | President, Semiconductor Test | $233k | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF1 The reported transactions were effected pursuant to a sales plan adopted by the Reporting Person on February 19, 2026 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934. | SEC |
| 2025-12-12 | 2025-12-15 | Smith Gregory Stephen | President and CEO | $223k | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF1 The shares were sold pursuant to a sales plan adopted by the Reporting Person on February 4, 2025 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934. | SEC |
| 2025-11-12 | 2025-11-14 | Smith Gregory Stephen | President and CEO | $200k | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF1 The shares were sold pursuant to a sales plan adopted by the Reporting Person on February 4, 2025 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934. | SEC |
| 2026-04-06 | 2026-04-07 | Johnson Mercedes | Director | $195k | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF1 The shares were sold pursuant to a sales plan adopted by the Reporting Person on February 3, 2025 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934. | SEC |
| 2026-03-05 | 2026-03-06 | Johnson Mercedes | Director | $187k | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF1 The shares were sold pursuant to a sales plan adopted by the Reporting Person on February 3, 2025 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934. | SEC |
The period balance: money in, money out
In the Form 4 filings submitted between Sep 9, 2025 and Oct 19, 2026 there is not one open-market purchase of Teradyne, Inc.: 38 sales worth $16.3M 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 Teradyne, 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 | 38 | $16.3M |
| A | Grant or award | 28 | $0 |
| F | Tax withholding (shares surrendered for taxes) | 16 | $10.9M |
| J | Other transaction (explained in the filing) | 15 | $0 |
| M | Option exercise | 3 | $642k |
| Total | Everything filed in the period | 100 | $27.8M |
43 of the 100 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, 14 distinct people or entities have filed Teradyne, Inc. transactions: none bought on the open market and 6 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 6 who sold on the open market (38 sales in all), the three biggest sellers account for $15.1M of the $16.3M: 93% of the money in three people.
| Filer | Role | Transactions | Bought (count) | Sold (count) | Last filed |
|---|---|---|---|---|---|
| Smith Gregory Stephen | President and CEO | 19 | — | $11.2M (11) | 2026-10-19 |
| Matz Marilyn | Director | 9 | — | $2.5M (8) | 2026-10-19 |
| Johnson Mercedes | Director | 14 | — | $1.4M (13) | 2026-10-02 |
| Poulin Shannon John | President, Semiconductor Test | 6 | — | $581k (2) | 2026-05-26 |
| Mills Regan | President, Product Test | 8 | — | $341k (3) | 2026-04-09 |
| Driscoll Ryan | VP, General Counsel, Secretary | 5 | — | $257k (1) | 2026-05-11 |
| Herweck Peter | Director | 11 | — | — | 2026-09-28 |
| Tufano Paul J | Director | 11 | — | — | 2026-09-28 |
Shown here are the 8 who moved the most money, out of 14. 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 6 sales, worth $4.2M. 1 of the 15 months have none.
| Month | Purchases | Amount | Sales | Amount |
|---|---|---|---|---|
| Aug 2025 | 0 | $0 | 0 | $0 |
| Sep 2025 | 0 | $0 | 3 | $209k |
| Oct 2025 | 0 | $0 | 2 | $253k |
| Nov 2025 | 0 | $0 | 2 | $310k |
| Dec 2025 | 0 | $0 | 2 | $348k |
| Jan 2026 | 0 | $0 | 1 | $132k |
| Feb 2026 | 0 | $0 | 2 | $429k |
| Mar 2026 | 0 | $0 | 1 | $187k |
| Apr 2026 | 0 | $0 | 3 | $274k |
| May 2026 | 0 | $0 | 6 | $4.2M |
| Jun 2026 | 0 | $0 | 3 | $2.3M |
| Jul 2026 | 0 | $0 | 3 | $1.9M |
| Aug 2026 | 0 | $0 | 3 | $2.3M |
| Sep 2026 | 0 | $0 | 4 | $1.8M |
| Oct 2026 | 0 | $0 | 3 | $1.7M |
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.
Teradyne, Inc. (TER) 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
19 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. Teradyne 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 19, 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.
Source: SEC EDGAR Form 4. This is a list of public facts, not financial advice or a recommendation to buy or sell.