Foster Karen A.
Officer · BLFS
As of 2026-09-16, Foster Karen A. has 27 Form 4 transactions on record across 1 company — 12 in the trailing 12 months.
Everything this person has disclosed to the SEC on Form 4 — across every company they file for — reconstructed from the public record. A filing history, not a tip sheet.
Pattern in the record: open-market sales filed in March in multiple years since 2025 — a recurring calendar cadence, more consistent with scheduled activity than a one-off decision.
Reconstructed holdings
- Direct $3.9M
- Indirect $0
| BLFS | direct | 108,758 sh | $3.9M |
Reconstructed from this person's own Form 4 filings — the total each filing reported owning afterward, priced at the close on the as-of date shown. A filed position can lag the real one.
Direct and indirect holdings (e.g. through a trust or fund) are tagged separately, as filed.
Trades by company
Filing ledger
| Date | Company | Action | Shares @ price | Value | Ownership Δ | Owned after | Filing |
|---|---|---|---|---|---|---|---|
| 2026-03-23 | BLFS | Sale | 2,577 @ $19.17 | $49K | −2.3% of holding | 108,758 | Form 4 |
| 2026-03-09 | BLFS | Sale | 500 @ $20.00 | $10K | −0.4% of holding | 113,242 | Form 4 |
| 2026-03-05 | BLFS | Sale | 96,923 @ $20.15 | $2.0M | −46.0% of holding | 113,742 | Form 4 |
| 2026-03-03 | BLFS | Sale | 418 @ $20.74 | $9K | −0.2% of holding | 210,665 | Form 4 |
| 2026-01-06 | BLFS | Sale | 335 @ $25.59 | $9K | −0.2% of holding | 191,984 | Form 4 |
| 2025-12-09 | BLFS | Sale | 519 @ $25.13 | $13K | −0.3% of holding | 192,319 | Form 4 |
| 2025-11-25 | BLFS | Sale | 415 @ $26.74 | $11K | −0.2% of holding | 192,838 | Form 4 |
| 2025-10-09 | BLFS | Sale | 419 @ $27.36 | $11K | −0.2% of holding | 193,253 | Form 4 |
| 2025-09-11 | BLFS | Sale | 511 @ $26.83 | $14K | −0.3% of holding | 193,672 | Form 4 |
| 2025-08-26 | BLFS | Sale | 413 @ $25.44 | $11K | −0.2% of holding | 194,183 | Form 4 |
| 2025-07-07 | BLFS | Sale | 400 @ $22.27 | $9K | −0.2% of holding | 194,596 | Form 4 |
| 2025-06-10 | BLFS | Sale | 320 @ $23.70 | $8K | −0.2% of holding | 194,996 | Form 4 |
| 2025-05-28 | BLFS | Sale | 251 @ $22.46 | $6K | −0.1% of holding | 195,316 | Form 4 |
| 2025-04-09 | BLFS | Sale | 286 @ $20.11 | $6K | −0.1% of holding | 195,567 | Form 4 |
| 2025-04-01 | BLFS | Sale | 7,869 @ $22.66 | $178K | −3.9% of holding | 195,853 | Form 4 |
| 2025-03-11 | BLFS | Sale | 1,331 @ $25.00 | $33K | −0.9% of holding | 154,912 | Form 4 |
| 2025-03-03 | BLFS | Sale | 324 @ $25.46 | $8K | −0.2% of holding | 156,243 | Form 4 |
| 2025-02-12 | BLFS | Sale | 78 @ $26.54 | $2K | −0.0% of holding | 156,567 | Form 4 |
| 2025-01-06 | BLFS | Sale | 328 @ $27.02 | $9K | −0.2% of holding | 156,645 | Form 4 |
8 award / exercise / gift records — not counted as purchases
| Date | Company | Action | Shares | Owned after | Filing |
|---|---|---|---|---|---|
| 2026-03-19 | BLFS | Withheld for tax | 1,907 | 111,335 | Form 4 |
| 2026-02-24 | BLFS | Withheld for tax | 13,013 | 211,083 | Form 4 |
| 2026-02-24 | BLFS | Award / grant | 32,112 | 224,096 | Form 4 |
| 2026-02-24 | BLFS | Award / grant | 32,112 | 224,096 | Form 4 |
| 2025-03-18 | BLFS | Award / grant | 29,711 | 203,722 | Form 4 |
| 2025-03-18 | BLFS | Award / grant | 29,711 | 203,722 | Form 4 |
| 2025-03-18 | BLFS | Award / grant | 19,099 | 174,011 | Form 4 |
| 2025-03-18 | BLFS | Award / grant | 19,099 | 174,011 | Form 4 |
Source: SEC Form 4 filings. Each row links to its original filing.
Research tool, not investment advice — historical frequencies, not recommendations. A product of Marovel Technologies LLC. Full terms.