Teradyne Inc
Ownership
Ownership Structure
Who owns Teradyne Inc (TER)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 99.8% of the shares are freely tradable; institutional investors hold 96.5%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 10.43 | 16,305,187 | +5.9 | 03/31/2026 |
| Vanguard Capital Management, LLC | 6.51 | 10,176,191 | +0.0 | 03/31/2026 |
| Vanguard Portfolio Management, LLC | 5.50 | 8,602,918 | +0.0 | 03/31/2026 |
| State Street Corp | 4.46 | 6,970,426 | -1.5 | 03/31/2026 |
| Geode Capital Management, LLC | 2.79 | 4,368,680 | +4.9 | 03/31/2026 |
| FMR Inc | 2.31 | 3,609,505 | +47.6 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard MStar Total Stk Mkt Idx Invest | 3.19 | 4,984,796 | +0.3 | 07/31/2026 |
| Vanguard 500 Index Investor | 2.63 | 4,109,079 | +1.1 | 07/31/2026 |
| iShares Semiconductor ETF | 2.33 | 3,637,031 | -0.2 | 08/31/2026 |
| Vanguard MStar Mid Cap Index Instl | 2.17 | 3,387,893 | -0.1 | 07/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Smith Gregory Stephen | President and CEO | 108,495 | 40,306,044 $ | Sep 15, 2026 | direct |
| Matz Marilyn | Director | 14,241 | 5,290,411 $ | Sep 15, 2026 | direct |
| Johnson Mercedes | Director | 6,364 | 2,364,226 $ | Sep 1, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Sep 15, 2026 | Smith Gregory Stephen | President and CEO | Sell | 4,000 | 337.83 | 1,351,320 |
| Sep 15, 2026 | Matz Marilyn | Director | Sell | 800 | 337.83 | 270,264 |
| Sep 1, 2026 | Johnson Mercedes | Director | Sell | 167 | 341.30 | 56,997 |
| Aug 17, 2026 | Smith Gregory Stephen | President and CEO | Sell | 4,000 | 425.00 | 1,700,000 |
| Aug 17, 2026 | Matz Marilyn | Director | Sell | 1,200 | 425.00 | 510,000 |
| Aug 3, 2026 | Johnson Mercedes | Director | Sell | 166 | 358.15 | 59,453 |
| Jul 15, 2026 | Smith Gregory Stephen | President and CEO | Sell | 4,000 | 356.31 | 1,425,240 |
| Jul 15, 2026 | Matz Marilyn | Director | Sell | 1,200 | 356.31 | 427,572 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: September 18, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.