Werner Sean
Officer · BLFS
As of 2026-09-16, Werner Sean has 17 Form 4 transactions on record across 1 company — 8 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 $1.7M
- Indirect $0
| BLFS | direct | 47,556 sh | $1.7M |
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 |
|---|---|---|---|---|---|---|---|
| 2026-03-03 | BLFS | Sale | 111 @ $20.74 | $2K | −0.2% of holding | 49,932 | Form 4 |
| 2025-11-25 | BLFS | Sale | 110 @ $26.74 | $3K | −0.4% of holding | 25,927 | Form 4 |
| 2025-10-20 | BLFS | Sale | 275 @ $27.82 | $8K | −1.0% of holding | 26,037 | Form 4 |
| 2025-09-11 | BLFS | Sale | 72 @ $26.83 | $2K | −0.3% of holding | 26,312 | Form 4 |
| 2025-08-26 | BLFS | Sale | 111 @ $25.44 | $3K | −0.4% of holding | 26,384 | Form 4 |
| 2025-07-18 | BLFS | Sale | 1,115 @ $21.22 | $24K | −4.0% of holding | 26,495 | Form 4 |
| 2025-06-10 | BLFS | Sale | 65 @ $23.70 | $2K | −0.2% of holding | 27,610 | Form 4 |
| 2025-05-28 | BLFS | Sale | 109 @ $22.46 | $2K | −0.4% of holding | 27,675 | Form 4 |
| 2025-03-04 | BLFS | Sale | 88 @ $24.03 | $2K | −1.8% of holding | 4,865 | Form 4 |
| 2025-03-03 | BLFS | Sale | 136 @ $25.46 | $3K | −2.7% of holding | 4,953 | Form 4 |
7 award / exercise / gift records — not counted as purchases
| Date | Company | Action | Shares | Owned after | Filing |
|---|---|---|---|---|---|
| 2026-07-17 | BLFS | Withheld for tax | 275 | 47,556 | Form 4 |
| 2026-06-18 | BLFS | Withheld for tax | 420 | 47,831 | Form 4 |
| 2026-03-19 | BLFS | Withheld for tax | 1,681 | 48,251 | Form 4 |
| 2026-02-24 | BLFS | Award / grant | 24,116 | 50,043 | Form 4 |
| 2026-02-24 | BLFS | Award / grant | 24,116 | 50,043 | Form 4 |
| 2025-03-18 | BLFS | Award / grant | 22,919 | 27,784 | Form 4 |
| 2025-03-18 | BLFS | Award / grant | 22,919 | 27,784 | 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.