| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| DuRoss Amy | Director | 3303 MONTE VILLA PARKWAY, SUITE 310, BOTHELL | /s/ Amy DuRoss | 17 Dec 2025 | 0001854968 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | BLFS | Common Stock | Sale | $49,200 | -2,000 | -9.7% | $24.60 | 18,687 | 15 Dec 2025 | Direct |