TER insider buying and SEC filings, explained
Teradyne, Inc. · CIK 97210
Tracked: Forms 3/4/5, 8-K, NT · All filings on sec.gov
Insider activity in the last 12 months
Bought
$0
Insiders who bought
0
Sold (not marked 10b5-1)
$0
Planned sales (10b5-1)
$16.0M
Insider purchases and sales, last 12 months
| Traded | Type | What was filed | Source |
|---|---|---|---|
| Nov 2, 2026 | Planned (10b5-1) | Mercedes Johnson (Director) sold 166 shares at $275.44 ($46K), marked as a 10b5-1 plan trade. Holdings down 3% to 6,031 shares. | SEC filing Filed Nov 3, 2026, 4:54 PM ET |
| Oct 21, 2026 | Planned (10b5-1) | Marilyn Matz (Director) sold 400 shares at $350.00 ($140K), marked as a 10b5-1 plan trade. Holdings down 3% to 12,641 shares. | SEC filing Filed Oct 22, 2026, 12:07 PM ET |
| Oct 15, 2026 | Planned (10b5-1) | Gregory Stephen Smith (CEO and Director) sold 4,000 shares at $341.28 ($1.4M), marked as a 10b5-1 plan trade. Holdings down 4% to 104,495 shares. | SEC filing Filed Oct 19, 2026, 11:42 AM ET |
| Oct 15, 2026 | Planned (10b5-1) | Marilyn Matz (Director) sold 800 shares at $341.28 ($273K), marked as a 10b5-1 plan trade. Holdings down 6% to 13,041 shares. | SEC filing Filed Oct 19, 2026, 11:35 AM ET |
| Oct 1, 2026 | Planned (10b5-1) | Mercedes Johnson (Director) sold 167 shares at $402.90 ($67K), marked as a 10b5-1 plan trade. Holdings down 3% to 6,197 shares. | SEC filing Filed Oct 2, 2026, 12:44 PM ET |
| Sep 17, 2026 | Planned (10b5-1) | Marilyn Matz (Director) sold 400 shares at $351.11 ($140K), marked as a 10b5-1 plan trade. Holdings down 3% to 13,841 shares. | SEC filing Filed Sep 18, 2026 |
| Sep 15, 2026 | Planned (10b5-1) | Gregory Stephen Smith (CEO and Director) sold 4,000 shares at $337.83 ($1.4M), marked as a 10b5-1 plan trade. Holdings down 4% to 108,495 shares. | SEC filing Filed Sep 16, 2026 |
| Sep 15, 2026 | Planned (10b5-1) | Marilyn Matz (Director) sold 800 shares at $337.83 ($270K), marked as a 10b5-1 plan trade. Holdings down 5% to 14,241 shares. | SEC filing Filed Sep 16, 2026 |
| Sep 1, 2026 | Planned (10b5-1) | Mercedes Johnson (Director) sold 167 shares at $341.30 ($57K), marked as a 10b5-1 plan trade. Holdings down 3% to 6,364 shares. | SEC filing Filed Sep 2, 2026 |
| Aug 17, 2026 | Planned (10b5-1) | Gregory Stephen Smith (CEO and Director) sold 4,000 shares at $425.00 ($1.7M), marked as a 10b5-1 plan trade. Holdings down 3% to 112,495 shares. | SEC filing Filed Aug 18, 2026 |
| Aug 17, 2026 | Planned (10b5-1) | Marilyn Matz (Director) sold 1,200 shares at $425.00 ($510K), marked as a 10b5-1 plan trade. Holdings down 7% to 15,041 shares. | SEC filing Filed Aug 18, 2026 |
| Aug 3, 2026 | Planned (10b5-1) | Mercedes Johnson (Director) sold 166 shares at $358.15 ($59K), marked as a 10b5-1 plan trade. Holdings down 2% to 6,531 shares. | SEC filing Filed Aug 4, 2026 |
| Jul 15, 2026 | Planned (10b5-1) | Gregory Stephen Smith (CEO and Director) sold 4,000 shares at $356.31 ($1.4M), marked as a 10b5-1 plan trade. Holdings down 3% to 116,495 shares. | SEC filing Filed Jul 16, 2026 |
| Jul 15, 2026 | Planned (10b5-1) | Marilyn Matz (Director) sold 1,200 shares at $356.31 ($428K), marked as a 10b5-1 plan trade. Holdings down 7% to 16,241 shares. | SEC filing Filed Jul 16, 2026 |
| Jul 1, 2026 | Planned (10b5-1) | Mercedes Johnson (Director) sold 167 shares at $460.00 ($77K), marked as a 10b5-1 plan trade. Holdings down 2% to 6,697 shares. | SEC filing Filed Jul 2, 2026 |
| Jun 15, 2026 | Planned (10b5-1) | Marilyn Matz (Director) sold 1,200 shares at $423.03 ($508K), marked as a 10b5-1 plan trade. Holdings down 6% to 17,441 shares. | SEC filing Filed Jun 16, 2026 |
| Jun 15, 2026 | Planned (10b5-1) | Gregory Stephen Smith (CEO and Director) sold 4,000 shares at $423.03 ($1.7M), marked as a 10b5-1 plan trade. Holdings down 3% to 120,470 shares. | SEC filing Filed Jun 16, 2026 |
| Jun 2, 2026 | Planned (10b5-1) | Mercedes Johnson (Director) sold 167 shares at $369.74 ($62K), marked as a 10b5-1 plan trade. Holdings down 2% to 6,864 shares. | SEC filing Filed Jun 3, 2026 |
| May 21–22, 2026 | Planned (10b5-1) | Shannon John Poulin (President / COO) sold 1,664 shares between May 21 and May 22 at about $349.17 ($581K), marked as a 10b5-1 plan trade. Holdings down 10% to 15,722 shares. | SEC filing Filed May 26, 2026 |
| May 21, 2026 | Planned (10b5-1) | Marilyn Matz (Director) sold 400 shares at $350.00 ($140K), marked as a 10b5-1 plan trade. Holdings down 2% to 18,641 shares. | SEC filing Filed May 26, 2026 |
| May 15, 2026 | Planned (10b5-1) | Gregory Stephen Smith (CEO and Director) sold 8,597 shares at $338.98 ($2.9M), marked as a 10b5-1 plan trade. Holdings down 6% to 124,470 shares. | SEC filing Filed May 19, 2026 |
| May 15, 2026 | Planned (10b5-1) | Marilyn Matz (Director) sold 800 shares at $338.98 ($271K), marked as a 10b5-1 plan trade. Holdings down 4% to 19,041 shares. | SEC filing Filed May 19, 2026 |
| May 7, 2026 | Planned (10b5-1) | Ryan Driscoll (VP, General Counsel, Secretary) sold 680 shares at $377.60 ($257K), marked as a 10b5-1 plan trade. Holdings down 8% to 7,665 shares. | SEC filing Filed May 11, 2026 |
| Apr 8, 2026 | Planned (10b5-1) | Regan Mills (President / COO) sold 16 shares at $342.17 ($5K), marked as a 10b5-1 plan trade. Holdings down <1% to 11,399 shares. | SEC filing Filed Apr 9, 2026 |
| Apr 6, 2026 | Planned (10b5-1) | Mercedes Johnson (Director) sold 625 shares at $312.20 ($195K), marked as a 10b5-1 plan trade. Holdings down 9% to 6,363 shares. | SEC filing Filed Apr 7, 2026 |
| Apr 2, 2026 | Planned (10b5-1) | Regan Mills (President / COO) sold 252 shares at $290.88 ($73K), marked as a 10b5-1 plan trade. Holdings down 2% to 11,415 shares. | SEC filing Filed Apr 3, 2026 |
| Mar 5, 2026 | Planned (10b5-1) | Mercedes Johnson (Director) sold 625 shares at $299.20 ($187K), marked as a 10b5-1 plan trade. Holdings down 8% to 6,988 shares. | SEC filing Filed Mar 6, 2026 |
| Feb 25, 2026 | Planned (10b5-1) | Regan Mills (President / COO) sold 788 shares at $332.87 ($262K), marked as a 10b5-1 plan trade. Holdings down 6% to 11,889 shares. | SEC filing Filed Feb 27, 2026 |
| Feb 5, 2026 | Planned (10b5-1) | Mercedes Johnson (Director) sold 625 shares at $266.98 ($167K), marked as a 10b5-1 plan trade. Holdings down 8% to 7,613 shares. | SEC filing Filed Feb 6, 2026 |
| Jan 5, 2026 | Planned (10b5-1) | Mercedes Johnson (Director) sold 625 shares at $211.85 ($132K), marked as a 10b5-1 plan trade. Holdings down 7% to 8,238 shares. | SEC filing Filed Jan 6, 2026 |
| Dec 12, 2025 | Planned (10b5-1) | Gregory Stephen Smith (CEO and Director) sold 1,108 shares at $201.31 ($223K), marked as a 10b5-1 plan trade. Holdings down 1% to 93,409 shares. | SEC filing Filed Dec 15, 2025 |
| Dec 5, 2025 | Planned (10b5-1) | Mercedes Johnson (Director) sold 625 shares at $200.00 ($125K), marked as a 10b5-1 plan trade. Holdings down 7% to 8,863 shares. | SEC filing Filed Dec 8, 2025 |
| Nov 12, 2025 | Planned (10b5-1) | Gregory Stephen Smith (CEO and Director) sold 1,108 shares at $180.20 ($200K), marked as a 10b5-1 plan trade. Holdings down 1% to 94,517 shares. | SEC filing Filed Nov 14, 2025 |
| Nov 5, 2025 | Planned (10b5-1) | Mercedes Johnson (Director) sold 625 shares at $177.05 ($111K), marked as a 10b5-1 plan trade. Holdings down 6% to 9,488 shares. | SEC filing Filed Nov 7, 2025 |
46 routine transactions (such as grants, option exercises or tax withholding) are not listed.
Cluster buys
No cluster buys in the last 12 months.
Red flags
No red flags in the last 12 months.
Key events
No key events in the last 12 months.
8-K filings, last 12 months
No 8-K filings in the last 12 months.
Red flags are objective triggers only: the item or form filed, never an opinion.
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