Foster Karen A. (CIK 1683151) reported 23 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-03-31). Recent activity: Sell BLFS (2,577 shares), Sell BLFS (1,907 shares), Sell BLFS (96,923 shares), Sell BLFS (500 shares), Sell BLFS (418 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-03-31 | BIOLIFE SOLUTIONS INC (BLFS) | Chief Quality and Operations | Sell | 2,577 | $49,401 |
| 2026-03-23 | BIOLIFE SOLUTIONS INC (BLFS) | Chief Quality and Operations | Sell | 1,907 | $36,462 |
| 2026-03-09 | BIOLIFE SOLUTIONS INC (BLFS) | Chief Quality and Operations | Sell | 96,923 | $2.0M |
| 2026-03-09 | BIOLIFE SOLUTIONS INC (BLFS) | Chief Quality and Operations | Sell | 500 | $10,000 |
| 2026-03-05 | BIOLIFE SOLUTIONS INC (BLFS) | Chief Quality and Operations | Sell | 418 | $8,669 |
| 2026-02-26 | BIOLIFE SOLUTIONS INC (BLFS) | Chief Quality and Operations | Buy | 32,112 | $0 |
| 2026-02-26 | BIOLIFE SOLUTIONS INC (BLFS) | Chief Quality and Operations | Sell | 13,013 | $294,744 |
| 2026-01-08 | BIOLIFE SOLUTIONS INC (BLFS) | Chief Quality and Operations | Sell | 335 | $8,573 |
| 2025-12-17 | BIOLIFE SOLUTIONS INC (BLFS) | Chief Quality and Operations | Sell | 519 | $13,042 |
| 2025-11-28 | BIOLIFE SOLUTIONS INC (BLFS) | Chief Quality and Operations | Sell | 415 | $11,097 |
| 2025-10-14 | BIOLIFE SOLUTIONS INC (BLFS) | Chief Quality and Operations | Sell | 419 | $11,464 |
| 2025-09-15 | BIOLIFE SOLUTIONS INC (BLFS) | Chief Quality and Operations | Sell | 511 | $13,710 |
| 2025-08-28 | BIOLIFE SOLUTIONS INC (BLFS) | Chief Quality and Operations | Sell | 413 | $10,507 |
| 2025-07-09 | BIOLIFE SOLUTIONS INC (BLFS) | Chief Quality and Operations | Sell | 400 | $8,908 |
| 2025-06-12 | BIOLIFE SOLUTIONS INC (BLFS) | Chief Quality and Operations | Sell | 320 | $7,584 |
| 2025-05-30 | BIOLIFE SOLUTIONS INC (BLFS) | Chief Quality and Operations | Sell | 251 | $5,637 |
| 2025-04-11 | BIOLIFE SOLUTIONS INC (BLFS) | Chief Quality and Operations | Sell | 286 | $5,751 |
| 2025-04-03 | BIOLIFE SOLUTIONS INC (BLFS) | Chief Quality and Operations | Sell | 7,869 | $178,312 |
| 2025-03-20 | BIOLIFE SOLUTIONS INC (BLFS) | Chief Quality and Operations | Buy | 19,099 | $0 |
| 2025-03-20 | BIOLIFE SOLUTIONS INC (BLFS) | Chief Quality and Operations | Buy | 29,711 | $0 |
| 2025-03-13 | BIOLIFE SOLUTIONS INC (BLFS) | Chief Quality and Operations | Sell | 1,331 | $33,275 |
| 2025-03-05 | BIOLIFE SOLUTIONS INC (BLFS) | Chief Quality and Operations | Sell | 324 | $8,249 |
| 2025-02-14 | BIOLIFE SOLUTIONS INC (BLFS) | Chief Quality and Operations | Sell | 78 | $2,070 |
Source: SEC Form 4 filings · as of 2026-03-31