SEC Form 4
Teradyne, Inc. (TER) insider trading
In the 12 months to Oct 23, 2026, 6 TER insiders reported open-market sales of $16.0M across 32 filings; no open-market purchases were filed.
Latest filing · Last 12 months · Source: SEC EDGAR · How we count
- Open-market sales
- $16.0M
- 32 filings · 6 insiders
- Open-market purchases
- $0
- 0 filings
- Pre-arranged sales (10b5-1)
- 31 of 32
- $15.7M of $16.0M sold (98%)
Who traded TER, and when
- Sale
- Sale, pre-arranged (10b5-1)
TER daily close from Oct 23, 2025 to Oct 23, 2026, between $144.28 and $483.84, last $308.85. 32 sale and 0 purchase filings by 6 insiders, marked at their filing dates. Gregory Stephen Smith, President and CEO: sold $10.9M across 8 filings, first filed Nov 14, 2025, last Oct 19, 2026. Marilyn Matz, Director: sold $2.7M across 9 filings, first filed May 19, 2026, last Oct 22, 2026. Mercedes Johnson, Director: sold $1.2M across 11 filings, first filed Nov 7, 2025, last Oct 2, 2026. Shannon John Poulin, President, Semiconductor Test: sold $581.0K across 1 filing, first filed May 26, 2026, last May 26, 2026. Regan Mills, President, Product Test: sold $335.6K across 2 filings, first filed Feb 27, 2026, last Apr 3, 2026. Ryan Driscoll, VP, General Counsel, Secretary: sold $256.8K across 1 filing, first filed May 11, 2026, last May 11, 2026.
Largest mark · tap a row for others
Gregory Stephen Smith · President and CEO
Sale $2,914,211
8,597 shares at $338.98 avg
Filed May 19, 2026 · traded May 15
Pre-arranged (10b5-1) · close on filing date $321.52
Gregory Stephen Smith · President and CEO
President and CEO
$10.9M soldMarilyn Matz · Director
Director
$2.7M soldMercedes Johnson · Director
Director
$1.2M soldShannon John Poulin · President, Semiconductor Test
President, Semiconductor Test
$581.0K soldRegan Mills · President, Product Test
President, Product Test
$335.6K soldRyan Driscoll · VP, General Counsel, Secretary
VP, General Counsel, Secretary
$256.8K soldHas Teradyne, Inc.'s CEO sold stock?
Yes. Gregory Stephen Smith (CEO) sold 30,813 shares ($10.9M) between Nov 2025 and Oct 2026, all under a pre-arranged 10b5-1 plan.
Open-market trades
32 filings in the last 12 months| Insider | Role | Sold | Bought | Filings | Pre-arranged (10b5-1) | Last filed |
|---|---|---|---|---|---|---|
| Gregory Stephen Smith | President and CEO | $10.9M | — | 8 | 100% of sales | |
| Marilyn Matz | Director | $2.7M | — | 9 | 100% of sales | |
| Mercedes Johnson | Director | $1.2M | — | 11 | 100% of sales | |
| Shannon John Poulin | President, Semiconductor Test | $581.0K | — | 1 | 100% of sales | |
| Regan Mills | President, Product Test | $335.6K | — | 2 | 22% of sales | |
| Ryan Driscoll | VP, General Counsel, Secretary | $256.8K | — | 1 | 100% of sales |
| Filed | Insider | Type | Shares | Avg price | Value | Held after | Source |
|---|---|---|---|---|---|---|---|
traded | Marilyn Matz Director | SalePre-arranged (10b5-1) | 400 | $350.00 | $140.0K | 12,641 | |
traded | Marilyn Matz Director | SalePre-arranged (10b5-1) | 800 | $341.28 | $273.0K | 13,041 | |
traded | Gregory Stephen Smith President and CEO | SalePre-arranged (10b5-1) | 4,000 | $341.28 | $1.4M | 104,495 | |
traded | Mercedes Johnson Director | SalePre-arranged (10b5-1) | 167 | $402.90 | $67.3K | 6,197 | |
traded | Marilyn Matz Director | SalePre-arranged (10b5-1) | 400 | $351.11 | $140.4K | 13,841 | |
traded | Marilyn Matz Director | SalePre-arranged (10b5-1) | 800 | $337.83 | $270.3K | 14,241 | |
traded | Gregory Stephen Smith President and CEO | SalePre-arranged (10b5-1) | 4,000 | $337.83 | $1.4M | 108,495 | |
traded | Mercedes Johnson Director | SalePre-arranged (10b5-1) | 167 | $341.30 | $57.0K | 6,364 | |
traded | Marilyn Matz Director | SalePre-arranged (10b5-1) | 1,200 | $425.00 | $510.0K | 15,041 | |
traded | Gregory Stephen Smith President and CEO | SalePre-arranged (10b5-1) | 4,000 | $425.00 | $1.7M | 112,495 | |
traded | Mercedes Johnson Director | SalePre-arranged (10b5-1) | 166 | $358.15 | $59.5K | 6,531 | |
traded | Marilyn Matz Director | SalePre-arranged (10b5-1) | 1,200 | $356.31 | $427.6K | 16,241 | |
traded | Gregory Stephen Smith President and CEO | SalePre-arranged (10b5-1) | 4,000 | $356.31 | $1.4M | 116,495 | |
traded | Mercedes Johnson Director | SalePre-arranged (10b5-1) | 167 | $460.00 | $76.8K | 6,697 | |
traded | Gregory Stephen Smith President and CEO | SalePre-arranged (10b5-1) | 4,000 | $423.03 | $1.7M | 120,470 | |
traded | Marilyn Matz Director | SalePre-arranged (10b5-1) | 1,200 | $423.03 | $507.6K | 17,441 | |
traded | Mercedes Johnson Director | SalePre-arranged (10b5-1) | 167 | $369.74 | $61.7K | 6,864 | |
traded | Marilyn Matz Director | SalePre-arranged (10b5-1) | 400 | $350.00 | $140.0K | 18,641 | |
traded | Shannon John Poulin President, Semiconductor Test | SalePre-arranged (10b5-1) | 1,664 | $349.17 | $581.0K | 15,722 | |
traded | Marilyn Matz Director | SalePre-arranged (10b5-1) | 800 | $338.98 | $271.2K | 19,041 | |
traded | Gregory Stephen Smith President and CEO | SalePre-arranged (10b5-1) | 8,597 | $338.98 | $2.9M | 124,470 | |
traded | Ryan Driscoll VP, General Counsel, Secretary | SalePre-arranged (10b5-1) | 680 | $377.60 | $256.8K | 7,665 | |
traded | Mercedes Johnson Director | SalePre-arranged (10b5-1) | 625 | $312.20 | $195.1K | 6,363 | |
traded | Regan Mills President, Product Test | SalePre-arranged (10b5-1) | 252 | $290.88 | $73.3K | 11,415 | |
traded | Mercedes Johnson Director | SalePre-arranged (10b5-1) | 625 | $299.20 | $187.0K | 6,988 | |
traded | Regan Mills President, Product Test | Sale | 788 | $332.87 | $262.3K | 11,889 | |
traded | Mercedes Johnson Director | SalePre-arranged (10b5-1) | 625 | $266.98 | $166.9K | 7,613 | |
traded | Mercedes Johnson Director | SalePre-arranged (10b5-1) | 625 | $211.85 | $132.4K | 8,238 | |
traded | Gregory Stephen Smith President and CEO | SalePre-arranged (10b5-1) | 1,108 | $201.31 | $223.1K | 93,409 | |
traded | Mercedes Johnson Director | SalePre-arranged (10b5-1) | 625 | $200.00 | $125.0K | 8,863 | |
traded | Gregory Stephen Smith President and CEO | SalePre-arranged (10b5-1) | 1,108 | $180.20 | $199.7K | 94,517 | |
traded | Mercedes Johnson Director | SalePre-arranged (10b5-1) | 625 | $177.05 | $110.7K | 9,488 |
GET /stocks/filings/vX/form-4?tickers=TER&filing_date.gte=2025-10-23&sort=filing_date.desc&limit=500{
"status": "OK",
"results": [
{
"tickers": [
"TER"
],
"issuer_cik": "0000097210",
"owner_cik": "0001618274",
"accession_number": "0000904454-26-000526",
"form_type": "4",
"filing_date": "2026-10-22",
"period_of_report": "2026-10-21",
"issuer_name": "TERADYNE, INC",
"issuer_trading_symbol": "TER",
"owner_name": "MATZ MARILYN",
"is_director": true,
"is_officer": false,
"is_ten_percent_owner": false,
"is_other": false,
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": true,
"transaction_date": "2026-10-21",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 400,
"transaction_price_per_share": 350,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 12640.675,
"transaction_value": 140000,
"not_subject_to_section_16": false,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F1",
"description": "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."
}
]
},
{
"tickers": [
"TER"
],
"issuer_cik": "0000097210",
"owner_cik": "0001618274",
"accession_number": "0000904454-26-000519",
"form_type": "4",
"filing_date": "2026-10-19",
"period_of_report": "2026-10-15",
"issuer_name": "TERADYNE, INC",
"issuer_trading_symbol": "TER",
"owner_name": "MATZ MARILYN",
"is_director": true,
"is_officer": false,
"is_ten_percent_owner": false,
"is_other": false,
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": true,
"transaction_date": "2026-10-15",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 800,
"transaction_price_per_share": 341.28,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 13040.675,
"transaction_value": 273024,
"not_subject_to_section_16": false,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F1",
"description": "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."
}
]
}
]
}
// trimmed to 2 resultsThe response includes every Form 4 record; this page keeps open-market purchases and sales on common stock and removes duplicate joint-filer rows.
Other insider activity (not market trades) · 58 records
- Option exercises3 records
- Tax withholding16 records
- Tax withholding (sold to cover)1 record
- Grants and awards26 records
- Other12 records
Reported on Form 4 but not purchases or sales in the market, so not counted in the totals above.
Build this yourself
This page joins two Massive endpoints: Form 4 filings and daily prices. Ask an agent to watch for new filings:
Using the Massive API (massive.com/docs/llms.txt), check Form 4 filings for TER every day with transaction_code=P and tell me when an insider files an open-market purchase, with their role, shares, price and the filing link.
How to read this page
- Open-market purchase or sale
- A buy or sell of the company's stock at market price. Grants, option exercises, shares withheld for tax, gifts and employee stock plan purchases are listed separately and not counted.
- Pre-arranged (10b5-1)
- The insider marked the filing as made under a trading plan set up in advance (SEC Rule 10b5-1). The mark covers the whole filing, and an unmarked filing may still be under a plan.
- Filing date
- Insiders have two business days to report a trade. Totals and the chart use the filing date, when the trade became public.