Harrison Robert Gardner — SEC Form 4 filings
SEC reporting owner CIK 1421563. 28 Form 4 filings on record with FilingPulse; latest filed 2026-05-06.
Transaction summary — filings shown
Covers all 28 filings on record, filed 2024-02-07 to 2026-05-06. Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.
- Open-market purchases (code P, non-derivative): none reported.
- Open-market sales (code S, non-derivative): 29 legs across 27 filings — 102,558 shares, $499,761 total (shares × price as filed).
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 2.
- Largest priced transaction: sale of 12,372 shares @ $7.30 ($90,316) in SERA PROGNOSTICS, INC., filed 2025-01-14.
By issuer — same filings
Open-market purchase/sale legs on non-derivative securities, grouped by issuer. Role is as filed on the newest filing for that issuer. Dollar totals cover priced legs only (shares × price as filed). Ordered by priced transaction value, largest first.
| Issuer | Role (as filed) | Filings | Purchases (P) | Sales (S) | Other legs |
|---|---|---|---|---|---|
| SERA PROGNOSTICS, INC. (SERA) | Chief Information Officer | 28 | — | 29 legs · 102,558 sh · $499,761 | 2 |
Form 4 filings — Harrison Robert Gardner
| Filed | Form | Issuer | Reported transactions | Source |
|---|---|---|---|---|
| 2026-05-06 | 4 | SERA PROGNOSTICS, INC. (SERA) | Holdings only — no transactions reported | EDGAR |
| 2026-03-12 | 4 | SERA PROGNOSTICS, INC. (SERA) | Sale (S): 716 @ $2.04 | EDGAR |
| 2026-03-10 | 4 | SERA PROGNOSTICS, INC. (SERA) | Sale (S): 3,360 @ $1.96 | EDGAR |
| 2026-02-24 | 4 | SERA PROGNOSTICS, INC. (SERA) | Sale (S): 2,000 @ $2.34 | EDGAR |
| 2026-01-27 | 4 | SERA PROGNOSTICS, INC. (SERA) | Sale (S): 2,000 @ $2.97 | EDGAR |
| 2025-12-30 | 4 | SERA PROGNOSTICS, INC. (SERA) | Sale (S): 2,000 @ $3 | EDGAR |
| 2025-12-11 | 4 | SERA PROGNOSTICS, INC. (SERA) | Sale (S): 616 @ $3.31 | EDGAR |
| 2025-12-03 | 4 | SERA PROGNOSTICS, INC. (SERA) | Sale (S): 2,000 @ $2.93 | EDGAR |
| 2025-11-12 | 4 | SERA PROGNOSTICS, INC. (SERA) | Sale (S): 6,528 @ $2.62 | EDGAR |
| 2025-11-04 | 4 | SERA PROGNOSTICS, INC. (SERA) | Sale (S): 2,000 @ $3.07 | EDGAR |
| 2025-10-08 | 4 | SERA PROGNOSTICS, INC. (SERA) | Sale (S): 2,000 @ $3.18 | EDGAR |
| 2025-09-12 | 4 | SERA PROGNOSTICS, INC. (SERA) | Sale (S): 645 @ $3.13 | EDGAR |
| 2025-09-09 | 4 | SERA PROGNOSTICS, INC. (SERA) | Sale (S): 2,000 @ $3.05 | EDGAR |
| 2025-08-20 | 4 | SERA PROGNOSTICS, INC. (SERA) | Sale (S): 6,000 @ $2.22 | EDGAR |
| 2025-08-11 | 4 | SERA PROGNOSTICS, INC. (SERA) | Sale (S): 5,962 @ $2.54 | EDGAR |
| 2025-06-11 | 4 | SERA PROGNOSTICS, INC. (SERA) | Sale (S): 667 @ $1.48 | EDGAR |
| 2025-05-09 | 4 | SERA PROGNOSTICS, INC. (SERA) | Sale (S): 6,551 @ $2.44 | EDGAR |
| 2025-03-10 | 4 | SERA PROGNOSTICS, INC. (SERA) | Sale (S): 3,874 @ $4.16 | EDGAR |
| 2025-03-07 | 4 | SERA PROGNOSTICS, INC. (SERA) | Grant/award (A): 25,770 @ $0 · Sale (S): 3,251 @ $4.16 · Grant/award (A): 36,830 (derivative) @ $0 | EDGAR |
| 2025-02-14 | 4 | SERA PROGNOSTICS, INC. (SERA) | Sale (S): 7,297 @ $4.58 | EDGAR |
| 2025-02-14 | 4 | SERA PROGNOSTICS, INC. (SERA) | Sale (S): 3,610 @ $4.28 | EDGAR |
| 2025-02-13 | 4 | SERA PROGNOSTICS, INC. (SERA) | Sale (S): 554 @ $3.97 | EDGAR |
| 2025-01-14 | 4 | SERA PROGNOSTICS, INC. (SERA) | Sale (S): 12,372 @ $7.30 · Sale (S): 1,837 @ $8.01 · Sale (S): 2,264 @ $6.47 | EDGAR |
| 2024-11-12 | 4 | SERA PROGNOSTICS, INC. (SERA) | Sale (S): 4,727 @ $7.32 | EDGAR |
| 2024-08-08 | 4 | SERA PROGNOSTICS, INC. (SERA) | Sale (S): 5,022 @ $7.42 | EDGAR |
| 2024-05-10 | 4 | SERA PROGNOSTICS, INC. (SERA) | Sale (S): 4,902 @ $9.59 | EDGAR |
| 2024-03-07 | 4 | SERA PROGNOSTICS, INC. (SERA) | Sale (S): 2,138 @ $9.02 | EDGAR |
| 2024-02-07 | 4 | SERA PROGNOSTICS, INC. (SERA) | Sale (S): 5,665 @ $8.03 | EDGAR |
FilingPulse's Form 4 archive currently extends back to 2024-01-11 and is expanding backward through EDGAR history — earlier filings by this insider may not be indexed yet. Names and roles are shown as filed.
Need this as JSON?
GET https://api.filingpulse.io/v1/insider-trades?owner_cik=1421563 returns every filing on this page — normalized, with footnotes and derivative legs — and webhooks push new filings to you in seconds. API docs →