Foster Karen A. insider trades
Foster Karen A. has filed 87 Form 4s with the SEC that we hold, all for Biolife Solutions INC (BLFS), as Chief Quality and Operations. Across all of them we count 0 purchases worth $0 and 71 sales worth $6.9M reported on Form 4. In the last 12 months: 0 purchases ($0) and 7 sales ($2.1M). The largest single trade was a sale of 96,923 shares of Biolife Solutions INC worth $2.0M, dated 2026-03-05. The first filing on our record is dated 2021-07-01 and the latest 2026-03-31.
Biolife Solutions INC (BLFS)
Chief Quality and Operations · 87 filings · 71 purchases and sales
| Trade date | Code | Shares | Value as filed | Filed |
|---|---|---|---|---|
| 2021-06-29 | S, sale reported on Form 4 | 607 | $26.6K | 2021-07-01 |
| 2021-07-26 | S, sale reported on Form 4 | 16,333 | $738.9K | 2021-07-28 |
| 2021-08-23 | S, sale reported on Form 4 | 16,332 | $760.1K | 2021-08-25 |
| 2021-08-26 | S, sale reported on Form 4 | 325 | $18.6K | 2021-08-30 |
| 2021-09-27 | S, sale reported on Form 4 | 16,332 | $729.4K | 2021-09-29 |
| 2021-09-28 | S, sale reported on Form 4 | 610 | $26.3K | 2021-09-30 |
| 2021-10-14 | S, sale reported on Form 4 | 1,082 | $43.2K | 2021-10-18 |
| 2021-10-25 | S, sale reported on Form 4 | 16,332 | $726.0K | 2021-10-27 |
| 2021-11-22 | S, sale reported on Form 4 | 16,332 | $754.4K | 2021-11-24 |
| 2021-11-30 | S, sale reported on Form 4 | 315 | $11.8K | 2021-12-02 |
| 2021-12-29 | S, sale reported on Form 4 | 625 | $24.6K | 2021-12-30 |
| 2022-02-10 | S, sale reported on Form 4 | 293 | $8.6K | 2022-02-14 |
| 2022-03-01 | S, sale reported on Form 4 | 221 | $5.3K | 2022-03-03 |
| 2022-03-29 | S, sale reported on Form 4 | 547 | $12.2K | 2022-03-31 |
| 2022-04-18 | S, sale reported on Form 4 | 16,413 | $288.7K | 2022-04-19 |
| 2022-05-13 | S, sale reported on Form 4 | 58 | $715 | 2022-05-17 |
| 2022-05-27 | S, sale reported on Form 4 | 174 | $2.5K | 2022-06-01 |
| 2022-06-28 | S, sale reported on Form 4 | 598 | $8.9K | 2022-06-30 |
| 2022-08-10 | S, sale reported on Form 4 | 95 | $2.2K | 2022-08-11 |
| 2022-08-31 | S, sale reported on Form 4 | 299 | $7.0K | 2022-09-01 |
| 2022-09-29 | S, sale reported on Form 4 | 559 | $12.9K | 2022-09-30 |
| 2022-11-10 | S, sale reported on Form 4 | 91 | $2.1K | 2022-11-14 |
| 2022-11-29 | S, sale reported on Form 4 | 307 | $6.1K | 2022-11-30 |
| 2022-12-28 | S, sale reported on Form 4 | 605 | $10.2K | 2022-12-30 |
| 2023-02-09 | S, sale reported on Form 4 | 81 | $2.0K | 2023-02-13 |
| 2023-03-01 | S, sale reported on Form 4 | 1,203 | $27.4K | 2023-03-03 |
| 2023-03-07 | S, sale reported on Form 4 | 175 | $4.0K | 2023-03-09 |
| 2023-03-29 | S, sale reported on Form 4 | 390 | $8.0K | 2023-03-31 |
| 2023-04-06 | S, sale reported on Form 4 | 1,101 | $22.1K | 2023-05-16 |
| 2023-05-15 | S, sale reported on Form 4 | 106 | $2.0K | 2023-05-17 |
| 2023-05-31 | S, sale reported on Form 4 | 392 | $9.1K | 2023-06-02 |
| 2023-06-27 | S, sale reported on Form 4 | 590 | $13.5K | 2023-06-29 |
| 2023-08-14 | S, sale reported on Form 4 | 156 | $1.9K | 2023-08-16 |
| 2023-08-25 | S, sale reported on Form 4 | 410 | $4.5K | 2023-08-29 |
| 2023-09-28 | S, sale reported on Form 4 | 568 | $8.0K | 2023-10-02 |
| 2023-11-13 | S, sale reported on Form 4 | 114 | $1.2K | 2023-11-15 |
| 2023-12-01 | S, sale reported on Form 4 | 466 | $5.8K | 2023-12-04 |
| 2024-01-02 | S, sale reported on Form 4 | 601 | $10.1K | 2024-01-04 |
| 2024-01-19 | S, sale reported on Form 4 | 1,198 | $20.1K | 2024-01-23 |
| 2024-02-21 | S, sale reported on Form 4 | 87 | $1.5K | 2024-02-23 |
| 2024-03-11 | S, sale reported on Form 4 | 319 | $5.6K | 2024-03-12 |
| 2024-03-12 | S, sale reported on Form 4 | 5,177 | $85.9K | 2024-03-12 |
| 2024-03-27 | S, sale reported on Form 4 | 395 | $7.1K | 2024-03-29 |
| 2024-04-18 | S, sale reported on Form 4 | 481 | $7.4K | 2024-04-23 |
| 2024-05-17 | S, sale reported on Form 4 | 85 | $1.9K | 2024-05-21 |
| 2024-05-29 | S, sale reported on Form 4 | 408 | $8.9K | 2024-05-31 |
| 2024-07-18 | S, sale reported on Form 4 | 240 | $5.4K | 2024-09-18 |
| 2024-08-21 | S, sale reported on Form 4 | 96 | $2.5K | 2024-09-18 |
| 2024-09-16 | S, sale reported on Form 4 | 267 | $6.7K | 2024-09-18 |
| 2024-10-30 | S, sale reported on Form 4 | 277 | $6.4K | 2024-11-01 |
| 2024-11-12 | S, sale reported on Form 4 | 66 | $1.7K | 2024-11-14 |
| 2024-11-26 | S, sale reported on Form 4 | 252 | $6.9K | 2024-11-29 |
| 2025-01-06 | S, sale reported on Form 4 | 328 | $8.9K | 2025-01-08 |
| 2025-02-12 | S, sale reported on Form 4 | 78 | $2.1K | 2025-02-14 |
| 2025-03-03 | S, sale reported on Form 4 | 324 | $8.2K | 2025-03-05 |
| 2025-03-11 | S, sale reported on Form 4 | 1,331 | $33.3K | 2025-03-13 |
| 2025-04-01 | S, sale reported on Form 4 | 7,869 | $178.3K | 2025-04-03 |
| 2025-04-09 | S, sale reported on Form 4 | 286 | $5.8K | 2025-04-11 |
| 2025-05-28 | S, sale reported on Form 4 | 251 | $5.6K | 2025-05-30 |
| 2025-06-10 | S, sale reported on Form 4 | 320 | $7.6K | 2025-06-12 |
| 2025-07-07 | S, sale reported on Form 4 | 400 | $8.9K | 2025-07-09 |
| 2025-08-26 | S, sale reported on Form 4 | 413 | $10.5K | 2025-08-28 |
| 2025-09-11 | S, sale reported on Form 4 | 511 | $13.7K | 2025-09-15 |
| 2025-10-09 | S, sale reported on Form 4 | 419 | $11.5K | 2025-10-14 |
| 2025-11-25 | S, sale reported on Form 4 | 415 | $11.1K | 2025-11-28 |
| 2025-12-09 | S, sale reported on Form 4 | 519 | $13.0K | 2025-12-17 |
| 2026-01-06 | S, sale reported on Form 4 | 335 | $8.6K | 2026-01-08 |
| 2026-03-03 | S, sale reported on Form 4 | 418 | $8.7K | 2026-03-05 |
| 2026-03-05 | S, sale reported on Form 4 | 96,923 | $2.0M | 2026-03-09 |
| 2026-03-09 | S, sale reported on Form 4 | 500 | $10.0K | 2026-03-09 |
| 2026-03-23 | S, sale reported on Form 4 | 2,577 | $49.4K | 2026-03-31 |
Source
Counted from the Form 4 filings this reporting owner (SEC CIK 1683151) filed on EDGAR. Values are the transaction values as filed. See every filing on EDGAR, or browse insider buying and today's insider purchases.
Source: U.S. Securities and Exchange Commission (EDGAR) and other official
government data · Updated 2026-10-12 ·
For informational purposes only, not investment advice.
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