BLLN's three largest insider shareholders as of August 27, 2026 are Krishna Kittu Kolluri (Director, 3.07Mn shares), Ventures I, L.P. Neotribe (TenPercentOwner, 3.06Mn shares), Firat Ileri (Director, 2.62Mn shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Bird Ventures Management Nv Humming | TenPercentOwner | 0 | 2,580,833 | 2,580,833 | 81.4% | 20 Jan, 2026 |
| 2 | Shan Riku Sakakibara | Chief Product Officer | 200,000 | 0 | 200,000 | 6.3% | 04 Aug, 2026 |
| 3 | Oguzhan Atay | Chairman And Ceo | 0 | 162,500 | 162,500 | 5.1% | 05 Aug, 2026 |
| 4 | Ventures I, L.P. Neotribe | TenPercentOwner | 87,362 | 0 | 87,362 | 2.8% | 11 Jun, 2026 |
| 5 | Firat Ileri | Director, TenPercentOwner | 40,331 | 0 | 40,331 | 1.3% | 11 Jun, 2026 |
| 6 | Krishna Kittu Kolluri | Director | 0 | 29,524 | 29,524 | 0.9% | 11 Jun, 2026 |
| 7 | Bosch John Roderick Ten | Svp Of Laboratory Operations | 27,884 | 0 | 27,884 | 0.9% | 12 Aug, 2026 |
| 8 | Akshay Rai | Director | 14,026 | 0 | 14,026 | 0.4% | 11 Jun, 2026 |
| 9 | Thomas S Bremner | Director | 11,350 | 0 | 11,350 | 0.4% | 12 Jun, 2026 |
| 10 | Anthony Pagano | Director | 7,913 | 0 | 7,913 | 0.2% | 11 Jun, 2026 |
| 11 | Nancy Joann Johnson | Officer | 6,900 | 0 | 6,900 | 0.2% | 20 Jul, 2026 |
| 12 | David Tsao | Chief Technology Officer | 1,000 | 0 | 1,000 | 0.0% | 12 Aug, 2026 |
| 13 | Thomas P. Lynch | Officer | 700 | 0 | 700 | 0.0% | 12 Nov, 2025 |
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 |
|---|---|---|---|---|---|---|---|---|
| 10 Aug, 2026 | David Tsao | Chief Technology Officer | Acquired M | 10,000 | $2.80 | $28.00K | 11,000 | Direct |
| 10 Aug, 2026 | Bosch John Roderick Ten | Svp Of Laboratory Operations | Disposed S | 1,417 | $92.86 | $131.58K | 27,884 | Direct |
| 10 Aug, 2026 | David Tsao | Chief Technology Officer | Disposed S | 10,000 | $92.86 | $928.60K | 1,000 | Direct |
| 10 Aug, 2026 | David Tsao | Chief Technology Officer | Disposed M | 10,000 | $2.80 | $28.00K | 590,000 | Direct |
| 05 Aug, 2026 | Oguzhan Atay | Chairman And Ceo | Acquired M | 15,539 | $2.80 | $43.51K | 15,539 | Direct |
| 05 Aug, 2026 | Oguzhan Atay | Chairman And Ceo | Disposed S | 15,539 | $150.03 | $2.33Mn | 0 | Direct |
| 05 Aug, 2026 | Oguzhan Atay | Chairman And Ceo | Disposed M | 15,539 | $2.80 | $43.51K | 526,961 | Direct |
| 03 Aug, 2026 | Oguzhan Atay | Chairman And Ceo | Acquired M | 20,000 | $2.80 | $56.00K | 20,000 | Direct |
| 03 Aug, 2026 | Oguzhan Atay | Chairman And Ceo | Acquired M | 6,250 | $2.80 | $17.50K | 26,250 | Direct |
| 03 Aug, 2026 | Oguzhan Atay | Chairman And Ceo | Acquired M | 6,250 | $2.80 | $17.50K | 32,500 | Direct |
| 03 Aug, 2026 | Oguzhan Atay | Chairman And Ceo | Disposed S | 269 | $133.01 | $35.78K | 32,231 | Direct |
| 03 Aug, 2026 | Oguzhan Atay | Chairman And Ceo | Disposed S | 555 | $133.81 | $74.26K | 31,676 | Direct |
| 03 Aug, 2026 | Oguzhan Atay | Chairman And Ceo | Disposed S | 135 | $135.42 | $18.28K | 31,541 | Direct |
| 03 Aug, 2026 | Oguzhan Atay | Chairman And Ceo | Disposed S | 6,354 | $136.42 | $866.84K | 25,187 | Direct |
| 03 Aug, 2026 | Oguzhan Atay | Chairman And Ceo | Disposed S | 9,989 | $137.25 | $1.37Mn | 15,198 | Direct |
| 03 Aug, 2026 | Oguzhan Atay | Chairman And Ceo | Disposed S | 2,431 | $138.09 | $335.69K | 12,767 | Direct |
| 03 Aug, 2026 | Oguzhan Atay | Chairman And Ceo | Disposed S | 267 | $139.21 | $37.17K | 12,500 | Direct |
| 03 Aug, 2026 | Oguzhan Atay | Chairman And Ceo | Disposed S | 84 | $133.00 | $11.17K | 12,416 | Direct |
| 03 Aug, 2026 | Oguzhan Atay | Chairman And Ceo | Disposed S | 173 | $133.81 | $23.15K | 12,243 | Direct |
| 03 Aug, 2026 | Oguzhan Atay | Chairman And Ceo | Disposed S | 44 | $135.41 | $5.96K | 12,199 | Direct |