As of September 09, 2026, the three largest insider holders of KPTI are Richard A. Paulson (President And Ceo, 1.16Mn shares), Michael Mason (Evp, Cfo Treasurer, 398.76K shares), Michael Mason (Evp, Cfo Treasurer, 391.05K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Richard A. Paulson | President And Ceo | 1,434,156 | 0 | 1,434,156 | 43.7% | 15 May, 2026 |
| 2 | Michael Mason | Evp, Cfo Treasurer | 789,810 | 0 | 789,810 | 24.1% | 05 Sep, 2024 |
| 3 | Sohanya Roshan Cheng | Evp Chief Commercial Officer | 134,175 | 0 | 134,175 | 4.1% | 15 May, 2026 |
| 4 | Jatin Shah | Evp, Chief Medical Officer | 129,450 | 0 | 129,450 | 3.9% | 22 Feb, 2022 |
| 5 | Stephen Mitchener | Svp, Chief Business Officer | 128,313 | 0 | 128,313 | 3.9% | 02 Mar, 2023 |
| 6 | Stuart Poulton | Evp, Chief Development Officer | 116,601 | 0 | 116,601 | 3.6% | 30 Jul, 2026 |
| 7 | Michael Mano | Evp, Closecretary | 112,922 | 0 | 112,922 | 3.4% | 15 May, 2026 |
| 8 | Michael Kauffman | Chief Executive Officer | 47,586 | 59,878 | 107,465 | 3.3% | 02 Mar, 2022 |
| 9 | Lori Macomber | Evp, Cfo Treasurer | 85,105 | 0 | 85,105 | 2.6% | 04 Feb, 2026 |
| 10 | Reshma Rangwala | Evp Chief Medical Officer | 80,145 | 0 | 80,145 | 2.4% | 15 May, 2026 |
| 11 | Sharon Shacham | Chief Scientific Officer | 63,879 | 0 | 63,879 | 1.9% | 31 Mar, 2022 |
| 12 | Kristin Abate | Chief Accounting Officer | 23,782 | 0 | 23,782 | 0.7% | 02 Sep, 2026 |
| 13 | Garen G Bohlin | Director | 18,517 | 0 | 18,517 | 0.6% | 26 May, 2026 |
| 14 | Chen Schor | Director | 15,508 | 0 | 15,508 | 0.5% | 26 May, 2026 |
| 15 | Deepika Pakianathan | Director | 15,508 | 0 | 15,508 | 0.5% | 26 May, 2026 |
| 16 | Zhen Su | Director | 15,508 | 0 | 15,508 | 0.5% | 26 May, 2026 |
| 17 | Ran Frenkel | Evp, Chief Dev. Officer | 11,220 | 0 | 11,220 | 0.3% | 02 Mar, 2022 |
| 18 | Barry E Greene | Director | 907 | 0 | 907 | 0.0% | 15 Aug, 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 |
|---|---|---|---|---|---|---|---|---|
| 28 Jul, 2026 | Stuart Poulton | Evp, Chief Development Officer | Disposed S | 189 | $7.10 | $1.34K | 94,632 | Direct |
| 21 May, 2026 | Deepika Pakianathan | Director | Acquired A | 15,508 | $0.00 | $0 | 15,508 | Direct |
| 21 May, 2026 | Zhen Su | Director | Acquired A | 15,508 | $0.00 | $0 | 15,508 | Direct |
| 21 May, 2026 | Garen G Bohlin | Director | Acquired A | 15,508 | $0.00 | $0 | 18,517 | Direct |
| 21 May, 2026 | Chen Schor | Director | Acquired A | 15,508 | $0.00 | $0 | 15,508 | Direct |
| 13 May, 2026 | Reshma Rangwala | Evp Chief Medical Officer | Acquired A | 947 | $0.00 | $0 | 57,237 | Direct |
| 13 May, 2026 | Kristin Abate | Chief Accounting Officer | Acquired A | 121 | $0.00 | $0 | 23,854 | Direct |
| 13 May, 2026 | Richard A. Paulson | President And Ceo | Acquired A | 4,920 | $0.00 | $0 | 271,950 | Direct |
| 13 May, 2026 | Michael Mano | Evp, Closecretary | Acquired A | 700 | $0.00 | $0 | 94,664 | Direct |
| 13 May, 2026 | Sohanya Roshan Cheng | Evp Chief Commercial Officer | Acquired A | 947 | $0.00 | $0 | 108,264 | Direct |
| 14 May, 2026 | Kristin Abate | Chief Accounting Officer | Disposed S | 53 | $9.50 | $504 | 23,801 | Direct |
| 14 May, 2026 | Richard A. Paulson | President And Ceo | Disposed S | 2,203 | $9.50 | $20.93K | 269,747 | Direct |
| 14 May, 2026 | Sohanya Roshan Cheng | Evp Chief Commercial Officer | Disposed S | 324 | $9.50 | $3.08K | 107,940 | Direct |
| 14 May, 2026 | Michael Mano | Evp, Closecretary | Disposed S | 266 | $9.50 | $2.53K | 94,398 | Direct |
| 14 May, 2026 | Reshma Rangwala | Evp Chief Medical Officer | Disposed S | 408 | $9.50 | $3.88K | 56,829 | Direct |
| 02 Mar, 2026 | Sohanya Roshan Cheng | Evp Chief Commercial Officer | Disposed S | 4,604 | $9.41 | $43.32K | 107,317 | Direct |
| 02 Mar, 2026 | Richard A. Paulson | President And Ceo | Disposed S | 12,361 | $9.41 | $116.31K | 267,030 | Direct |
| 02 Mar, 2026 | Richard A. Paulson | President And Ceo | Disposed S | 12,361 | $9.41 | $116.31K | 267,030 | Direct |
| 02 Mar, 2026 | Kristin Abate | Chief Accounting Officer | Disposed S | 559 | $9.41 | $5.26K | 22,063 | Direct |
| 02 Mar, 2026 | Michael Mano | Evp, Closecretary | Disposed S | 3,526 | $9.41 | $33.18K | 93,964 | Direct |