Teradyne's top three insider shareholders as of March 23, 2026 are Mark E Jagiela (Ceo, 208.60K shares), Gregory Stephen Smith (President And Ceo, 128.47K shares), Paul J Tufano (Director, 64.86K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Paul J Tufano | 64,886 | 0 | 17 Mar, 2026 | |
| Walter G. Vahey | Exec. Vp, Corp. Development | 41,570 | 0 | 01 Feb, 2022 |
| Peter Herweck | 15,374 | 0 | 17 Mar, 2026 | |
| John Francis Wood | President, System Test Group | 14,137 | 0 | 04 Feb, 2025 |
| Michelle L. Turner | Chief Financial Officer | 11,260 | 0 | 05 Nov, 2025 |
| Ernest E Maddock | 9,597 | 0 | 17 Mar, 2026 | |
| Kralingen Bridget A Van | 5,556 | 0 | 13 May, 2025 | |
| Ford Tamer | 5,359 | 0 | 16 May, 2023 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 13 Mar, 2026 | Ernest E Maddock | Common Stock | A | 2 | $0.00 | 9,597 | D | J |
| 13 Mar, 2026 | Paul J Tufano | Common Stock | A | 25 | $0.00 | 64,886 | D | J |
| 13 Mar, 2026 | Peter Herweck | Common Stock | A | 5 | $0.00 | 15,374 | D | J |
| 17 Dec, 2025 | Paul J Tufano | Common Stock | A | 256 | $0.00 | 64,825 | D | A |
| 17 Dec, 2025 | Peter Herweck | Common Stock | A | 148 | $0.00 | 15,362 | D | A |
| 17 Dec, 2025 | Ernest E Maddock | Common Stock | A | 2 | $0.00 | 9,595 | D | J |
| 17 Dec, 2025 | Paul J Tufano | Common Stock | A | 36 | $0.00 | 64,861 | D | J |
| 17 Dec, 2025 | Peter Herweck | Common Stock | A | 7 | $0.00 | 15,369 | D | J |
| 03 Nov, 2025 | Michelle L. Turner | Common Stock | A | 11,144 | $0.00 | 11,260 | D | A |
| 03 Nov, 2025 | Michelle L. Turner | Stock Option (Right to Buy) | A | 9,156 | $0.00 | 9,156 | D | A |
| 29 Sep, 2025 | Ernest E Maddock | Common Stock | A | 3 | $0.00 | 9,593 | D | J |
| 29 Sep, 2025 | Paul J Tufano | Common Stock | A | 49 | $0.00 | 64,569 | D | J |
| 29 Sep, 2025 | Peter Herweck | Common Stock | A | 9 | $0.00 | 15,214 | D | J |
| 25 Sep, 2025 | Paul J Tufano | Common Stock | A | 357 | $0.00 | 64,520 | D | A |
| 25 Sep, 2025 | Peter Herweck | Common Stock | A | 206 | $0.00 | 15,205 | D | A |
| 26 Jun, 2025 | Paul J Tufano | Common Stock | A | 521 | $0.00 | 64,163 | D | A |
| 26 Jun, 2025 | Peter Herweck | Common Stock | A | 302 | $0.00 | 14,999 | D | A |
| 13 Jun, 2025 | Peter Herweck | Common Stock | A | 15 | $0.00 | 14,697 | D | J |
| 13 Jun, 2025 | Paul J Tufano | Common Stock | A | 79 | $0.00 | 63,642 | D | J |
| 13 Jun, 2025 | Ernest E Maddock | Common Stock | A | 6 | $0.00 | 9,590 | D | J |