Collegium Pharmaceutical's top three insider shareholders as of September 09, 2026 are Capital Management Lp Rubric (TenPercentOwner, 3.13Mn shares), Capital Management Lp Rubric (TenPercentOwner, 3.13Mn shares), Vikram Karnani (President And Ceo, 197.86K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Capital Management Lp Rubric | TenPercentOwner | 0 | 3,132,743 | 3,132,743 | 69.1% | 15 Aug, 2025 |
| 2 | Vikram Karnani | President And Ceo | 197,864 | 0 | 197,864 | 4.4% | 12 Feb, 2026 |
| 3 | Colleen Tupper | Evp Chief Financial Officer | 147,282 | 0 | 147,282 | 3.2% | 12 Feb, 2026 |
| 4 | Alison B Fleming | Evp Chief Technical Officer | 143,694 | 0 | 143,694 | 3.2% | 12 Aug, 2021 |
| 5 | Richard Malamut | Evp And Chief Medical Officer | 130,264 | 0 | 130,264 | 2.9% | 14 Feb, 2022 |
| 6 | Shirley R. Kuhlmann | Evp And General Counsel | 108,137 | 0 | 108,137 | 2.4% | 06 Mar, 2025 |
| 7 | Gino Santini | Director | 103,783 | 0 | 103,783 | 2.3% | 18 May, 2026 |
| 8 | Thomas B Smith | Evp And Chief Medical Officer | 90,651 | 0 | 90,651 | 2.0% | 12 Feb, 2026 |
| 9 | John Gordon Freund | Director | 83,952 | 0 | 83,952 | 1.9% | 20 May, 2026 |
| 10 | David Dieter | Evp General Counsel | 77,071 | 0 | 77,071 | 1.7% | 20 Mar, 2026 |
| 11 | Scott Dreyer | Evp Chief Commercial Officer | 71,770 | 0 | 71,770 | 1.6% | 05 Mar, 2026 |
| 12 | Garen G Bohlin | Director | 62,259 | 0 | 62,259 | 1.4% | 19 May, 2025 |
| 13 | Rita J. Balice-Gordon | Director | 61,370 | 0 | 61,370 | 1.4% | 18 May, 2026 |
| 14 | Michael Thomas Heffernan | Chairman, President And Ceo | 50,328 | 0 | 50,328 | 1.1% | 12 Feb, 2025 |
| 15 | Carlos V Paya | Director | 28,323 | 0 | 28,323 | 0.6% | 18 May, 2026 |
| 16 | Nancy Lurker | Director | 26,758 | 0 | 26,758 | 0.6% | 18 May, 2026 |
| 17 | Donovan Michael Glancy | Director | 17,482 | 0 | 17,482 | 0.4% | 18 May, 2026 |
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 |
|---|---|---|---|---|---|---|---|---|
| 18 May, 2026 | John Gordon Freund | Director | Disposed S | 20 | $34.05 | $681 | 83,952 | Direct |
| 14 May, 2026 | John Gordon Freund | Director | Acquired A | 8,741 | $0.00 | $0 | 79,399 | Direct |
| 14 May, 2026 | Carlos V Paya | Director | Acquired A | 8,741 | $0.00 | $0 | 28,323 | Direct |
| 14 May, 2026 | Rita J. Balice-Gordon | Director | Acquired A | 8,741 | $0.00 | $0 | 61,370 | Direct |
| 14 May, 2026 | Gino Santini | Director | Acquired A | 8,741 | $0.00 | $0 | 103,783 | Direct |
| 14 May, 2026 | Nancy Lurker | Director | Acquired A | 8,741 | $0.00 | $0 | 26,758 | Direct |
| 14 May, 2026 | Garen G Bohlin | Director | Acquired A | 8,741 | $0.00 | $0 | 71,000 | Direct |
| 14 May, 2026 | Donovan Michael Glancy | Director | Acquired A | 17,482 | $0.00 | $0 | 17,482 | Direct |
| 15 May, 2026 | John Gordon Freund | Director | Acquired M | 8,700 | $16.49 | $143.46K | 88,099 | Direct |
| 15 May, 2026 | John Gordon Freund | Director | Disposed S | 4,127 | $34.54 | $142.55K | 83,972 | Direct |
| 15 May, 2026 | John Gordon Freund | Director | Disposed M | 8,700 | $0.00 | $0 | 0 | Direct |
| 13 May, 2026 | Nancy Lurker | Director | Disposed S | 4,500 | $35.97 | $161.86K | 18,017 | Direct |
| 11 May, 2026 | Garen G Bohlin | Director | Acquired M | 8,700 | $16.49 | $143.46K | 70,959 | Direct |
| 11 May, 2026 | Garen G Bohlin | Director | Disposed S | 8,700 | $37.18 | $323.49K | 62,259 | Direct |
| 11 May, 2026 | Garen G Bohlin | Director | Disposed M | 8,700 | $0.00 | $0 | 0 | Direct |
| 17 Mar, 2026 | David Dieter | Evp General Counsel | Disposed F | 8,840 | $35.72 | $315.76K | 68,231 | Direct |
| 17 Mar, 2026 | David Dieter | Evp General Counsel | Disposed F | 8,840 | $35.72 | $315.76K | 68,231 | Direct |
| 17 Mar, 2026 | David Dieter | Evp General Counsel | Disposed F | 8,840 | $35.72 | $315.76K | 68,231 | Direct |
| 17 Mar, 2026 | David Dieter | Evp General Counsel | Disposed F | 8,840 | $35.72 | $315.76K | 68,231 | Direct |
| 18 Mar, 2026 | David Dieter | Evp General Counsel | Disposed S | 13,976 | $34.92 | $488.10K | 77,071 | Direct |