Teradyne, Inc. (TER) Shareholders & Insider Trades
Teradyne shareholders at a glance
The largest holder of Teradyne stock is BlackRock Advisors LLC, with 15.4 million shares (9.85% of the company), worth about $5.39 billion as of September 25, 2026. The 10 largest holders together own 44.1%.
In Q2 2026, 1,510 institutional holdings reports listed shares worth $73.50 billion.
Insiders reported 82 transactions in the last two years: 36 sales worth $7.57 million and no purchases. The newest one on file is from May 15, 2026 (Smith Gregory Stephen, Chief Executive Officer).
Major holders as of September 25, 2026; quarterly totals from institutional holdings reports (latest Q2 2026); insider transactions on file through May 15, 2026.
Teradyne, Inc.
Shareholders Summary
2026Q2
Ownership by Type
Geographic Distribution
Largest Teradyne shareholders
| Holder | Shares | % of company | Value |
|---|---|---|---|
| BlackRock Advisors LLC | 15.4 million | 9.85% | $5.4B |
| Vanguard Capital Management LLC | 10.2 million | 6.54% | $3.6B |
| Vanguard Portfolio Management LLC | 8.6 million | 5.52% | $3.0B |
| State Street Corporation | 7.3 million | 4.66% | $2.6B |
| Invesco Advisers, Inc. | 6.7 million | 4.28% | $2.3B |
| JPMorgan Investment Management, Inc. | 5.6 million | 3.56% | $1.9B |
| Geode Capital Management LLC | 4.6 million | 2.94% | $1.6B |
| Fidelity Management & Research Co. LLC | 4.1 million | 2.63% | $1.4B |
| BlackRock Life Ltd. | 3.7 million | 2.34% | $1.3B |
| Ameriprise Financial Services LLC | 2.7 million | 1.74% | $951.0M |
As of September 25, 2026.
Teradyne institutional holdings by quarter
| Quarter | Reports | Shares | Value |
|---|---|---|---|
| Q2 2026 | 1,510 | – | $73.5B |
| Q1 2026 | 1,304 | 145.0 million | $42.8B |
| Q4 2025 | 1,107 | 153.0 million | $29.4B |
| Q3 2025 | 886 | – | $22.9B |
| Q2 2025 | 779 | 163.0 million | $14.7B |
| Q1 2025 | 797 | 156.0 million | $12.9B |
| Q4 2024 | 834 | 160.0 million | $20.1B |
| Q3 2024 | 812 | 167.0 million | $22.3B |
Shares and value held by institutions that file quarterly holdings reports (options not included).
Teradyne insider trades
| Insider | Date | Title | Transaction | Value |
|---|---|---|---|---|
| Smith Gregory Stephen | May 15, 2026 | Chief Executive Officer | Conversion of Exercise of derivative security at price 72.10 per share. | $331,444 |
| Smith Gregory Stephen | May 15, 2026 | Chief Executive Officer | Sale at price 338.98 per share. | $2.9M |
| Matz Marilyn | May 15, 2026 | Director | Sale at price 338.98 per share. | $271,184 |
| Herweck Peter | May 8, 2026 | Director | Stock Award(Grant) at price 0.00 per share. | – |
| Henry Andrew Chisholm | May 8, 2026 | Director | Stock Award(Grant) at price 0.00 per share. | – |
| Johnson Mercedes | May 8, 2026 | Director | Stock Award(Grant) at price 0.00 per share. | – |
| Sayiner Necip | May 8, 2026 | Director | Stock Award(Grant) at price 0.00 per share. | – |
| Van Kralingen Bridget Anne | May 8, 2026 | Director | Stock Award(Grant) at price 0.00 per share. | – |
| Matz Marilyn | May 8, 2026 | Director | Stock Award(Grant) at price 0.00 per share. | – |
| Tufano Paul J | May 8, 2026 | Director | Stock Award(Grant) at price 0.00 per share. | – |
| Maddock Ernest E | May 8, 2026 | Director | Stock Award(Grant) at price 0.00 per share. | – |
| Driscoll Ryan E | May 7, 2026 | General Counsel | Sale at price 377.60 per share. | $256,768 |
Newest 12 of 82 insider transactions in the last two years.
Questions and answers
Who owns the most Teradyne stock?
BlackRock Advisors LLC, with 9.85% of the company (as of September 25, 2026). Next: Vanguard Capital Management LLC (6.54%) and Vanguard Portfolio Management LLC (5.52%).
How many institutions own Teradyne stock?
1,510 institutional holdings reports listed Teradyne shares in Q2 2026 worth $73.50 billion.
Are Teradyne insiders buying or selling the stock?
In the last two years insiders reported 36 sales and no purchases (82 transactions in all); the newest on file is from May 15, 2026.
