As of September 29, 2026, the three largest insider holders of BCYC are Bros. Advisors Lp Baker (Director, 10.02Mn shares), Kevin Lee (Chief Executive Officer, 603.67K shares), Gregory Paul Winter (Director, 196.43K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Bros. Advisors Lp Baker | Director, TenPercentOwner | 0 | 10,018,674 | 10,018,674 | 83.9% | 06 Jan, 2026 |
| 2 | Kevin Lee | Chief Executive Officer | 603,671 | 0 | 603,671 | 5.1% | 07 Jul, 2026 |
| 3 | Gregory Paul Winter | Director | 196,427 | 0 | 196,427 | 1.6% | 06 Jan, 2026 |
| 4 | Michael Skynner | Chief Scientific Officer | 157,171 | 0 | 157,171 | 1.3% | 07 Jul, 2026 |
| 5 | Alistair Milnes | Chief Operating Officer | 136,717 | 0 | 136,717 | 1.1% | 06 Jan, 2026 |
| 6 | Michael Charles Ferguson Hannay | Chief Prod Supply Chain Off | 94,375 | 0 | 94,375 | 0.8% | 07 Jul, 2026 |
| 7 | Jennifer Scott Perry | Chief Operating Officer | 91,052 | 0 | 91,052 | 0.8% | 07 Jul, 2026 |
| 8 | Alethia Young | Chief Financial Officer | 87,081 | 0 | 87,081 | 0.7% | 06 Jan, 2026 |
| 9 | Santiago Arroyo | Chief Development Officer | 69,057 | 0 | 69,057 | 0.6% | 06 Jan, 2025 |
| 10 | Travis Alvin Thompson | Chief Financial Officer | 64,441 | 0 | 64,441 | 0.5% | 07 Jul, 2026 |
| 11 | Nicholas Keen | Chief Scientific Officer | 62,024 | 0 | 62,024 | 0.5% | 08 Jul, 2024 |
| 12 | Nigel Crockett | Chief Business Officer | 51,053 | 0 | 51,053 | 0.4% | 06 Jan, 2025 |
| 13 | Pierre Legault | Director | 46,000 | 0 | 46,000 | 0.4% | 06 Jan, 2025 |
| 14 | Dominic Smethurst | Chief Medical Officer | 36,699 | 0 | 36,699 | 0.3% | 05 Jan, 2023 |
| 15 | Janice Bourque | Director | 32,500 | 0 | 32,500 | 0.3% | 06 Jan, 2026 |
| 16 | Jose-Carlos Gutierrez-Ramos | Director | 32,500 | 0 | 32,500 | 0.3% | 06 Jan, 2026 |
| 17 | Lee Kalowski | President And Cfo | 30,309 | 0 | 30,309 | 0.3% | 05 Apr, 2023 |
| 18 | Stephen H. Sands | Director | 26,893 | 0 | 26,893 | 0.2% | 06 Jan, 2026 |
| 19 | Richard N Kender | Director | 23,000 | 0 | 23,000 | 0.2% | 06 Jan, 2025 |
| 20 | Alessandro Riva | Director | 19,880 | 0 | 19,880 | 0.2% | 06 Jan, 2026 |
| 21 | Robert Charles Swanton | Director | 19,213 | 0 | 19,213 | 0.2% | 06 Jan, 2026 |
| 22 | Veronica Gh Jordan | Director | 16,750 | 0 | 16,750 | 0.1% | 04 Jan, 2024 |
| 23 | Roger D Dansey | Director | 15,532 | 0 | 15,532 | 0.1% | 06 Jan, 2026 |
| 24 | Herve Hoppenot | Director | 15,532 | 0 | 15,532 | 0.1% | 06 Jan, 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 |
|---|---|---|---|---|---|---|---|---|
| 15 Jul, 2026 | Michael Charles Ferguson Hannay | Chief Prod Supply Chain Off | Acquired A | 60,000 | $0.00 | $0 | 60,000 | Direct |
| 15 Jul, 2026 | Michael Skynner | Chief Scientific Officer | Acquired A | 60,000 | $0.00 | $0 | 60,000 | Direct |
| 15 Jul, 2026 | Jennifer Scott Perry | Chief Operating Officer | Acquired A | 60,000 | $0.00 | $0 | 60,000 | Direct |
| 15 Jul, 2026 | Travis Alvin Thompson | Chief Financial Officer | Acquired A | 60,000 | $0.00 | $0 | 60,000 | Direct |
| 02 Jul, 2026 | Travis Alvin Thompson | Chief Financial Officer | Disposed S | 819 | $4.27 | $3.50K | 64,545 | Direct |
| 02 Jul, 2026 | Kevin Lee | Chief Executive Officer | Disposed S | 5,905 | $4.27 | $25.21K | 605,408 | Direct |
| 02 Jul, 2026 | Jennifer Scott Perry | Chief Operating Officer | Disposed S | 1,036 | $4.27 | $4.42K | 91,428 | Direct |
| 02 Jul, 2026 | Michael Charles Ferguson Hannay | Chief Prod Supply Chain Off | Disposed S | 1,506 | $4.27 | $6.43K | 94,630 | Direct |
| 02 Jul, 2026 | Michael Skynner | Chief Scientific Officer | Disposed S | 1,859 | $4.27 | $7.94K | 157,703 | Direct |
| 06 Jul, 2026 | Kevin Lee | Chief Executive Officer | Disposed S | 1,737 | $4.31 | $7.49K | 603,671 | Direct |
| 06 Jul, 2026 | Michael Skynner | Chief Scientific Officer | Disposed S | 532 | $4.31 | $2.29K | 157,171 | Direct |
| 06 Jul, 2026 | Jennifer Scott Perry | Chief Operating Officer | Disposed S | 43 | $4.31 | $185 | 91,385 | Direct |
| 06 Jul, 2026 | Travis Alvin Thompson | Chief Financial Officer | Disposed S | 104 | $4.31 | $448 | 64,441 | Direct |
| 06 Jul, 2026 | Michael Charles Ferguson Hannay | Chief Prod Supply Chain Off | Disposed S | 255 | $4.31 | $1.10K | 94,375 | Direct |
| 06 Jul, 2026 | Jennifer Scott Perry | Chief Operating Officer | Disposed S | 333 | $4.34 | $1.45K | 91,052 | Direct |
| 02 Apr, 2026 | Jennifer Scott Perry | Chief Operating Officer | Disposed S | 1,038 | $4.91 | $5.10K | 92,834 | Direct |
| 02 Apr, 2026 | Michael Charles Ferguson Hannay | Chief Prod Supply Chain Off | Disposed S | 1,521 | $4.91 | $7.47K | 96,387 | Direct |
| 02 Apr, 2026 | Travis Alvin Thompson | Chief Financial Officer | Disposed S | 799 | $4.91 | $3.92K | 65,466 | Direct |
| 02 Apr, 2026 | Michael Skynner | Chief Scientific Officer | Disposed S | 1,879 | $4.91 | $9.23K | 160,087 | Direct |
| 02 Apr, 2026 | Kevin Lee | Chief Executive Officer | Disposed S | 5,967 | $4.91 | $29.30K | 613,029 | Direct |