As of September 17, 2026, aTYR PHARMA's top three insider holders are Paul Schimmel (Director, 779.14K shares), Sanjay Shukla (President And Ceo, 153.55K shares), Sanjay Shukla (President And Ceo, 116.55K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Paul Schimmel | Director | 8,890 | 779,143 | 788,033 | 61.9% | 28 May, 2026 |
| 2 | Sanjay Shukla | President And Ceo | 270,101 | 0 | 270,101 | 21.2% | 04 Feb, 2026 |
| 3 | Timothy Coughlin | Director | 6,000 | 56,000 | 62,000 | 4.9% | 03 Jun, 2024 |
| 4 | Jill Marie Broadfoot | Chief Financial Officer | 58,117 | 0 | 58,117 | 4.6% | 04 Feb, 2026 |
| 5 | Nancy Denyes | General Counsel | 47,891 | 0 | 47,891 | 3.8% | 04 Feb, 2026 |
| 6 | John K Clarke | Director | 19,797 | 0 | 19,797 | 1.6% | 28 Apr, 2023 |
| 7 | Jane A Gross | Director | 15,750 | 0 | 15,750 | 1.2% | 17 Mar, 2025 |
| 8 | Svetlana Lucas | Director | 6,000 | 0 | 6,000 | 0.5% | 28 Apr, 2023 |
| 9 | Sara Zaknoen | Director | 6,000 | 0 | 6,000 | 0.5% | 28 Apr, 2023 |
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 |
|---|---|---|---|---|---|---|---|---|
| 27 May, 2026 | Paul Schimmel | Director | Acquired P | 100,000 | $0.50 | $49.63K | 779,143 | Indirect |
| 11 May, 2026 | Jane A Gross | Director | Acquired A | 50,000 | $0.00 | $0 | 50,000 | Direct |
| 11 May, 2026 | Paul Schimmel | Director | Acquired A | 50,000 | $0.00 | $0 | 50,000 | Direct |
| 11 May, 2026 | Eric Benevich | Director | Acquired A | 50,000 | $0.00 | $0 | 50,000 | Direct |
| 11 May, 2026 | Sara Zaknoen | Director | Acquired A | 50,000 | $0.00 | $0 | 50,000 | Direct |
| 11 May, 2026 | Timothy Coughlin | Director | Acquired A | 50,000 | $0.00 | $0 | 50,000 | Direct |
| 11 May, 2026 | Svetlana Lucas | Director | Acquired A | 50,000 | $0.00 | $0 | 50,000 | Direct |
| 03 Feb, 2026 | Sanjay Shukla | President And Ceo | Acquired M | 10,375 | — | — | 157,298 | Direct |
| 03 Feb, 2026 | Nancy Denyes | General Counsel | Acquired M | 2,687 | — | — | 34,242 | Direct |
| 03 Feb, 2026 | Jill Marie Broadfoot | Chief Financial Officer | Acquired M | 3,750 | — | — | 38,854 | Direct |
| 04 Feb, 2026 | Jill Marie Broadfoot | Chief Financial Officer | Disposed S | 1,558 | $0.98 | $1.52K | 37,296 | Direct |
| 04 Feb, 2026 | Nancy Denyes | General Counsel | Disposed S | 1,118 | $0.98 | $1.09K | 33,124 | Direct |
| 04 Feb, 2026 | Sanjay Shukla | President And Ceo | Disposed S | 3,745 | $0.98 | $3.66K | 153,553 | Direct |
| 03 Feb, 2026 | Sanjay Shukla | President And Ceo | Disposed M | 10,375 | $0.00 | $0 | 0 | Direct |
| 03 Feb, 2026 | Jill Marie Broadfoot | Chief Financial Officer | Disposed M | 3,750 | $0.00 | $0 | 0 | Direct |
| 03 Feb, 2026 | Nancy Denyes | General Counsel | Disposed M | 2,687 | $0.00 | $0 | 0 | Direct |
| 09 Jan, 2026 | Sanjay Shukla | President And Ceo | Acquired A | 1,500,000 | $0.00 | $0 | 1,500,000 | Direct |
| 09 Jan, 2026 | Nancy Denyes | General Counsel | Acquired A | 412,500 | $0.00 | $0 | 412,500 | Direct |
| 09 Jan, 2026 | Jill Marie Broadfoot | Chief Financial Officer | Acquired A | 412,500 | $0.00 | $0 | 412,500 | Direct |
| 08 Oct, 2025 | Paul Schimmel | Director | Acquired P | 682,001 | $0.90 | $612.44K | 1,095,024 | Indirect |