As of September 29, 2026, the three largest insider holders of SNDX are Michael A Metzger (Chief Executive Officer, 484.84K shares), Dennis Podlesak (Director, 239.76K shares), Keith A. Goldan (Chief Financial Officer, 139.25K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Michael A Metzger | Chief Executive Officer | 484,843 | 0 | 484,843 | 28.6% | 09 Jul, 2026 |
| 2 | Dennis Podlesak | Director | 239,763 | 0 | 239,763 | 14.2% | 06 Feb, 2026 |
| 3 | Keith A. Goldan | Chief Financial Officer | 139,252 | 0 | 139,252 | 8.2% | 02 Jun, 2026 |
| 4 | Keith Katkin | Director | 124,000 | 0 | 124,000 | 7.3% | 06 Feb, 2026 |
| 5 | Pierre Legault | Director | 114,000 | 0 | 114,000 | 6.7% | 06 Feb, 2026 |
| 6 | Jennifer Jarrett | Director | 114,000 | 0 | 114,000 | 6.7% | 06 Feb, 2026 |
| 7 | Martin H. Jr. Huber | Director | 103,000 | 0 | 103,000 | 6.1% | 06 Feb, 2026 |
| 8 | William Meury | Director | 90,000 | 0 | 90,000 | 5.3% | 07 Feb, 2025 |
| 9 | Neil Gallagher | President, Head Of Rd | 85,095 | 0 | 85,095 | 5.0% | 12 Feb, 2025 |
| 10 | Nicholas A.J. Botwood | Head Of Rd, Cmo | 60,885 | 0 | 60,885 | 3.6% | 12 Jun, 2026 |
| 11 | Aleksandra Rizo | Director | 49,000 | 0 | 49,000 | 2.9% | 06 Feb, 2026 |
| 12 | Briggs Morrison | President, Head Of Rd | 34,836 | 0 | 34,836 | 2.1% | 09 Feb, 2024 |
| 13 | Fabrice Egros | Director | 32,000 | 0 | 32,000 | 1.9% | 03 Feb, 2022 |
| 14 | Michael L. Meyers | Svp, Chief Medical Officer | 23,280 | 0 | 23,280 | 1.4% | 03 Feb, 2022 |
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 Jul, 2026 | Michael A Metzger | Chief Executive Officer | Acquired M | 32,375 | $6.38 | $206.55K | 517,218 | Direct |
| 08 Jul, 2026 | Michael A Metzger | Chief Executive Officer | Disposed S | 32,375 | $24.24 | $784.78K | 484,843 | Direct |
| 08 Jul, 2026 | Michael A Metzger | Chief Executive Officer | Acquired M | 32,375 | $0.00 | $0 | 0 | Direct |
| 11 Jun, 2026 | Nicholas A.J. Botwood | Head Of Rd, Cmo | Acquired M | 22,515 | $13.82 | $311.16K | 95,165 | Direct |
| 11 Jun, 2026 | Nicholas A.J. Botwood | Head Of Rd, Cmo | Disposed S | 34,280 | $18.00 | $617.04K | 60,885 | Direct |
| 12 Jun, 2026 | Nicholas A.J. Botwood | Head Of Rd, Cmo | Acquired M | 31,235 | $13.82 | $431.67K | 92,120 | Direct |
| 12 Jun, 2026 | Nicholas A.J. Botwood | Head Of Rd, Cmo | Disposed S | 31,235 | $18.14 | $566.60K | 60,885 | Direct |
| 11 Jun, 2026 | Nicholas A.J. Botwood | Head Of Rd, Cmo | Acquired M | 22,515 | $0.00 | $0 | 0 | Direct |
| 12 Jun, 2026 | Nicholas A.J. Botwood | Head Of Rd, Cmo | Acquired M | 31,235 | $0.00 | $0 | 0 | Direct |
| 01 Jun, 2026 | Keith A. Goldan | Chief Financial Officer | Disposed S | 1,177 | $18.99 | $22.35K | 139,252 | Direct |
| 01 Jun, 2026 | Michael A Metzger | Chief Executive Officer | Disposed S | 6,847 | $18.99 | $130.02K | 484,843 | Direct |
| 09 Feb, 2026 | Keith A. Goldan | Chief Financial Officer | Disposed S | 3,410 | $21.03 | $71.71K | 140,429 | Direct |
| 09 Feb, 2026 | Michael A Metzger | Chief Executive Officer | Disposed S | 17,159 | $21.03 | $360.82K | 491,690 | Direct |
| 04 Feb, 2026 | Dennis Podlesak | Director | Acquired A | 48,000 | $0.00 | $0 | 239,763 | Direct |
| 04 Feb, 2026 | Michael A Metzger | Chief Executive Officer | Acquired A | 73,000 | $0.00 | $0 | 371,661 | Direct |
| 04 Feb, 2026 | Pierre Legault | Director | Acquired A | 24,000 | $0.00 | $0 | 114,000 | Direct |
| 04 Feb, 2026 | Keith Katkin | Director | Acquired A | 24,000 | $0.00 | $0 | 124,000 | Direct |
| 30 Jan, 2026 | Keith A. Goldan | Chief Financial Officer | Acquired J | 1,219 | $8.48 | $10.34K | 93,671 | Direct |
| 04 Feb, 2026 | Martin H. Jr. Huber | Director | Acquired A | 24,000 | $0.00 | $0 | 103,000 | Direct |
| 04 Feb, 2026 | Jennifer Jarrett | Director | Acquired A | 24,000 | $0.00 | $0 | 114,000 | Direct |