Teradyne's three largest insider shareholders as of August 04, 2026 are Mark E Jagiela (Ceo, 208.60K shares), Gregory Stephen Smith (President And Ceo, 128.47K shares), Paul J Tufano (Director, 65.05K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Mark E Jagiela | Ceo | 208,600 | 0 | 208,600 | 24.1% | 31 Jan, 2023 |
| 2 | Gregory Stephen Smith | President And Ceo | 128,470 | 0 | 128,470 | 14.8% | 06 Feb, 2026 |
| 3 | Paul J Tufano | Director | 65,045 | 0 | 65,045 | 7.5% | 30 Mar, 2026 |
| 4 | Timothy E Guertin | Director | 62,729 | 0 | 62,729 | 7.2% | 19 Mar, 2024 |
| 5 | Brad Robbins | President, Litepoint Corp. | 52,772 | 0 | 52,772 | 6.1% | 31 Jan, 2024 |
| 6 | Edwin J Gillis | Director | 43,921 | 0 | 43,921 | 5.1% | 21 Mar, 2023 |
| 7 | Walter G. Vahey | Exec. Vp, Corp. Development | 41,570 | 0 | 41,570 | 4.8% | 01 Feb, 2022 |
| 8 | Sanjay Mehta | Vp And Chief Financial Officer | 36,576 | 0 | 36,576 | 4.2% | 05 Feb, 2025 |
| 9 | Richard John Burns | President, Semiconductor Test | 25,191 | 0 | 25,191 | 2.9% | 05 Feb, 2025 |
| 10 | Michael A Bradley | Ceo | 24,815 | 0 | 24,815 | 2.9% | 17 Dec, 2021 |
| 11 | Charles Jeffrey Gray | Vp, General Counsel, Secretary | 24,643 | 0 | 24,643 | 2.8% | 31 Jan, 2024 |
| 12 | Marilyn Matz | Director | 19,173 | 0 | 19,173 | 2.2% | 13 May, 2025 |
| 13 | Ujjwal Kumar | President, Teradyne Robotics | 16,369 | 0 | 16,369 | 1.9% | 05 Aug, 2025 |
| 14 | Shannon John Poulin | President, Semiconductor Test | 16,074 | 0 | 16,074 | 1.9% | 03 Apr, 2026 |
| 15 | Peter Herweck | Director | 15,466 | 0 | 15,466 | 1.8% | 30 Mar, 2026 |
| 16 | John Francis Wood | President, System Test Group | 14,137 | 0 | 14,137 | 1.6% | 04 Feb, 2025 |
| 17 | Regan Mills | President, Product Test | 11,399 | 0 | 11,399 | 1.3% | 09 Apr, 2026 |
| 18 | Michelle L. Turner | Chief Financial Officer | 11,260 | 0 | 11,260 | 1.3% | 05 Nov, 2025 |
| 19 | Jean Pierre Hathout | President, Teradyne Robotics | 10,174 | 0 | 10,174 | 1.2% | 06 Feb, 2026 |
| 20 | Ernest E Maddock | Director | 9,597 | 0 | 9,597 | 1.1% | 17 Mar, 2026 |
| 21 | Ryan Driscoll | Vp, General Counsel, Secretary | 8,345 | 0 | 8,345 | 1.0% | 06 Feb, 2026 |
| 22 | Mercedes Johnson | Director | 6,363 | 0 | 6,363 | 0.7% | 07 Apr, 2026 |
| 23 | Kralingen Bridget A Van | Director | 5,556 | 0 | 5,556 | 0.6% | 13 May, 2025 |
| 24 | John Lukez | President, Litepoint Corp. | 4,185 | 0 | 4,185 | 0.5% | 04 Feb, 2025 |
| 25 | Andrew Chisholm Henry | Director | 2,207 | 0 | 2,207 | 0.3% | 30 Mar, 2026 |
| 26 | Necip Sayiner | Director | 2,132 | 0 | 2,132 | 0.2% | 03 Jul, 2025 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 08 Apr, 2026 | Regan Mills | President, Product Test | Disposed S | 16 | $342.17 | $5.47K | 11,399 | Direct |
| 06 Apr, 2026 | Mercedes Johnson | Director | Disposed S | 625 | $312.20 | $195.13K | 6,363 | Direct |
| 01 Apr, 2026 | Regan Mills | President, Product Test | Disposed F | 222 | $312.20 | $69.31K | 11,667 | Direct |
| 01 Apr, 2026 | Shannon John Poulin | President, Semiconductor Test | Disposed F | 1,162 | $312.20 | $362.78K | 16,074 | Direct |
| 02 Apr, 2026 | Regan Mills | President, Product Test | Disposed S | 252 | $290.88 | $73.30K | 11,415 | Direct |
| 26 Mar, 2026 | Paul J Tufano | Director | Acquired A | 159 | $0.00 | $0 | 65,045 | Direct |
| 26 Mar, 2026 | Paul J Tufano | Director | Acquired A | 159 | $0.00 | $0 | 65,045 | Direct |
| 26 Mar, 2026 | Andrew Chisholm Henry | Director | Acquired A | 75 | $0.00 | $0 | 2,207 | Direct |
| 26 Mar, 2026 | Paul J Tufano | Director | Acquired A | 159 | $0.00 | $0 | 65,045 | Direct |
| 26 Mar, 2026 | Paul J Tufano | Director | Acquired A | 159 | $0.00 | $0 | 65,045 | Direct |
| 26 Mar, 2026 | Peter Herweck | Director | Acquired A | 92 | $0.00 | $0 | 15,466 | Direct |
| 13 Mar, 2026 | Paul J Tufano | Director | Acquired J | 25 | $0.00 | $0 | 64,886 | Direct |
| 13 Mar, 2026 | Paul J Tufano | Director | Acquired J | 25 | $0.00 | $0 | 64,886 | Direct |
| 13 Mar, 2026 | Ernest E Maddock | Director | Acquired J | 2 | $0.00 | $0 | 9,597 | Direct |
| 13 Mar, 2026 | Paul J Tufano | Director | Acquired J | 25 | $0.00 | $0 | 64,886 | Direct |
| 13 Mar, 2026 | Peter Herweck | Director | Acquired J | 5 | $0.00 | $0 | 15,374 | Direct |
| 13 Mar, 2026 | Paul J Tufano | Director | Acquired J | 25 | $0.00 | $0 | 64,886 | Direct |
| 05 Mar, 2026 | Mercedes Johnson | Director | Disposed S | 625 | $299.20 | $187.00K | 6,988 | Direct |
| 25 Feb, 2026 | Regan Mills | President, Product Test | Disposed S | 788 | $332.87 | $262.30K | 11,889 | Direct |
| 04 Feb, 2026 | Gregory Stephen Smith | President And Ceo | Acquired A | 13,380 | $0.00 | $0 | 128,470 | Direct |