As of September 29, 2026, the three largest insider holders of IPSC are Venture Capital Vi, L.P. Versant (TenPercentOwner, 11.45Mn shares), Brent Pfeiffenberger (President And Ceo, 3.63Mn shares), Chad Cowan (Chief Scientific Officer, 1.18Mn shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Venture Capital Vi, L.P. Versant | TenPercentOwner | 11,452,014 | 0 | 11,452,014 | 63.1% | 11 Aug, 2022 |
| 2 | Brent Pfeiffenberger | President And Ceo | 3,633,839 | 0 | 3,633,839 | 20.0% | 15 Sep, 2026 |
| 3 | Chad Cowan | Chief Scientific Officer | 1,175,322 | 0 | 1,175,322 | 6.5% | 15 Jun, 2026 |
| 4 | Gregory Russotti | Officer | 509,198 | 0 | 509,198 | 2.8% | 15 Sep, 2026 |
| 5 | Douglas Carr | Svp Finance Operations | 502,907 | 0 | 502,907 | 2.8% | 15 Sep, 2026 |
| 6 | Luis Borges | Chief Scientific Officer | 256,535 | 0 | 256,535 | 1.4% | 05 Apr, 2023 |
| 7 | Michael Craig Diem | Chief Financial Officer | 253,533 | 0 | 253,533 | 1.4% | 03 Nov, 2023 |
| 8 | Adrienne Farid | Chief Operations Officer | 250,141 | 0 | 250,141 | 1.4% | 11 Jun, 2025 |
| 9 | Morgan Conn | Chief Finanical Officer | 79,648 | 0 | 79,648 | 0.4% | 12 Mar, 2025 |
| 10 | Hyam Levitsky | President Of Rd | 24,000 | 0 | 24,000 | 0.1% | 11 Mar, 2024 |
| 11 | Daphne Quimi | Director | 5,000 | 0 | 5,000 | 0.0% | 16 Sep, 2024 |
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 |
|---|---|---|---|---|---|---|---|---|
| 09 Sep, 2026 | Joseph Truitt | Director | Acquired A | 148,000 | $0.00 | $0 | 148,000 | Direct |
| 08 Sep, 2026 | Douglas Carr | Svp Finance Operations | Disposed S | 254 | $2.05 | $521 | 504,565 | Direct |
| 04 Sep, 2026 | Brent Pfeiffenberger | President And Ceo | Disposed F | 463 | $2.11 | $977 | 3,633,839 | Direct |
| 08 Sep, 2026 | Gregory Russotti | Officer | Disposed S | 534 | $2.05 | $1.09K | 511,785 | Direct |
| 14 Aug, 2026 | Brent Pfeiffenberger | President And Ceo | Disposed F | 31,172 | $1.92 | $59.85K | 3,634,302 | Direct |
| 03 Aug, 2026 | Douglas Carr | Svp Finance Operations | Disposed S | 275 | $1.98 | $544 | 504,819 | Direct |
| 11 Jun, 2026 | Brent Pfeiffenberger | President And Ceo | Disposed F | 13,849 | $2.24 | $31.02K | 3,665,474 | Direct |
| 11 Jun, 2026 | Chad Cowan | Chief Scientific Officer | Disposed F | 358 | $2.24 | $802 | 1,175,322 | Direct |
| 12 Jun, 2026 | Douglas Carr | Svp Finance Operations | Disposed S | 1,654 | $2.23 | $3.69K | 505,094 | Direct |
| 12 Jun, 2026 | Gregory Russotti | Officer | Disposed S | 2,584 | $2.23 | $5.77K | 512,319 | Direct |
| 11 Jun, 2026 | Martin Patrick Murphy | Director | Acquired A | 74,000 | $0.00 | $0 | 74,000 | Direct |
| 11 Jun, 2026 | Alessandro Riva | Director | Acquired A | 74,000 | $0.00 | $0 | 74,000 | Direct |
| 11 Jun, 2026 | Kimberly Blackwell | Director | Acquired A | 74,000 | $0.00 | $0 | 74,000 | Direct |
| 11 Jun, 2026 | Han Myung Lee | Director | Acquired A | 74,000 | $0.00 | $0 | 74,000 | Direct |
| 11 Jun, 2026 | Daphne Quimi | Director | Acquired A | 74,000 | $0.00 | $0 | 74,000 | Direct |
| 05 Jun, 2026 | Brent Pfeiffenberger | President And Ceo | Disposed F | 463 | $2.13 | $986 | 3,679,323 | Direct |
| 08 Jun, 2026 | Gregory Russotti | Officer | Disposed S | 524 | $2.11 | $1.11K | 514,903 | Direct |
| 08 Jun, 2026 | Douglas Carr | Svp Finance Operations | Disposed S | 249 | $2.11 | $526 | 506,748 | Direct |
| 15 May, 2026 | Brent Pfeiffenberger | President And Ceo | Disposed F | 31,172 | $2.34 | $72.94K | 3,679,786 | Direct |
| 04 May, 2026 | Douglas Carr | Svp Finance Operations | Disposed S | 264 | $2.34 | $618 | 506,997 | Direct |