BNTC's three largest insider shareholders as of August 29, 2026 are Capital Management, Llc Suvretta (Director, 1.85Mn shares), Capital Management, Llc Suvretta (Director, 1.85Mn shares), J Kevin Buchi (Director, 103.63K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Capital Management, Llc Suvretta | Director, TenPercentOwner | 0 | 1,848,156 | 1,848,156 | 96.0% | 29 Dec, 2025 |
| 2 | J Kevin Buchi | Director | 52,097 | 0 | 52,097 | 2.7% | 30 Jun, 2026 |
| 3 | Megan Boston | Executive Director | 25,907 | 0 | 25,907 | 1.3% | 14 Aug, 2023 |
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 |
|---|---|---|---|---|---|---|---|---|
| 29 Jun, 2026 | J Kevin Buchi | Director | Disposed G | 51,813 | $0.00 | $0 | 52,097 | Direct |
| 26 May, 2026 | David Matthew Friedman | Director | Acquired A | 35,000 | $0.00 | $0 | 35,000 | Direct |
| 22 Jan, 2026 | Sharon Mates | Director | Acquired A | 31,500 | $0.00 | $0 | 31,500 | Direct |
| 22 Jan, 2026 | Sharon Mates | Director | Acquired A | 31,500 | $0.00 | $0 | 31,500 | Direct |
| 22 Jan, 2026 | Sharon Mates | Director | Acquired A | 31,500 | $0.00 | $0 | 31,500 | Direct |
| 22 Jan, 2026 | Sharon Mates | Director | Acquired A | 31,500 | $0.00 | $0 | 31,500 | Direct |
| 23 Dec, 2025 | Capital Management, Llc Suvretta | Director, TenPercentOwner | Acquired P | 42,600 | $12.85 | $547.41K | 9,620,075 | Indirect |
| 23 Dec, 2025 | Capital Management, Llc Suvretta | Director, TenPercentOwner | Acquired P | 42,600 | $12.85 | $547.41K | 9,620,075 | Indirect |
| 23 Dec, 2025 | Capital Management, Llc Suvretta | Director, TenPercentOwner | Acquired P | 42,600 | $12.85 | $547.41K | 9,620,075 | Indirect |
| 23 Dec, 2025 | Capital Management, Llc Suvretta | Director, TenPercentOwner | Acquired P | 42,600 | $12.85 | $547.41K | 9,620,075 | Indirect |
| 23 Dec, 2025 | Capital Management, Llc Suvretta | Director, TenPercentOwner | Acquired P | 7,400 | $12.85 | $95.09K | 1,834,053 | Indirect |
| 23 Dec, 2025 | Capital Management, Llc Suvretta | Director, TenPercentOwner | Acquired P | 7,400 | $12.85 | $95.09K | 1,834,053 | Indirect |
| 23 Dec, 2025 | Capital Management, Llc Suvretta | Director, TenPercentOwner | Acquired P | 7,400 | $12.85 | $95.09K | 1,834,053 | Indirect |
| 23 Dec, 2025 | Capital Management, Llc Suvretta | Director, TenPercentOwner | Acquired P | 7,400 | $12.85 | $95.09K | 1,834,053 | Indirect |
| 26 Dec, 2025 | Capital Management, Llc Suvretta | Director, TenPercentOwner | Acquired P | 14,320 | $13.10 | $187.59K | 9,634,395 | Indirect |
| 26 Dec, 2025 | Capital Management, Llc Suvretta | Director, TenPercentOwner | Acquired P | 14,320 | $13.10 | $187.59K | 9,634,395 | Indirect |
| 26 Dec, 2025 | Capital Management, Llc Suvretta | Director, TenPercentOwner | Acquired P | 14,320 | $13.10 | $187.59K | 9,634,395 | Indirect |
| 26 Dec, 2025 | Capital Management, Llc Suvretta | Director, TenPercentOwner | Acquired P | 14,320 | $13.10 | $187.59K | 9,634,395 | Indirect |
| 26 Dec, 2025 | Capital Management, Llc Suvretta | Director, TenPercentOwner | Acquired P | 2,516 | $13.10 | $32.96K | 1,836,569 | Indirect |
| 26 Dec, 2025 | Capital Management, Llc Suvretta | Director, TenPercentOwner | Acquired P | 2,516 | $13.10 | $32.96K | 1,836,569 | Indirect |