| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| DuRoss Amy | Director | 3303 MONTE VILLA PARKWAY, SUITE 310, BOTHELL | /s/ Amy DuRoss | 28 Nov 2025 | 0001854968 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | BLFS | Common Stock | Sale | $54,000 | -2,000 | -8.1% | $27.00 | 22,687 | 25 Nov 2025 | Direct | |
| transaction | BLFS | Common Stock | Sale | $54,000 | -2,000 | -8.8% | $27.00 | 20,687 | 26 Nov 2025 | Direct |