Flanagan W. Michael — SEC Form 4 filings
SEC reporting owner CIK 1841990. 18 Form 4 filings on record with FilingPulse; latest filed 2026-03-02.
Transaction summary — filings shown
Covers all 18 filings on record, filed 2024-01-23 to 2026-03-02. 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): 19 legs across 14 filings — 336,230 shares, $13,498,776 total (shares × price as filed).
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 32.
- Largest priced transaction: sale of 62,500 shares @ $47.62 ($2,976,112) in Avidity Biosciences, Inc., filed 2024-10-03.
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 |
|---|---|---|---|---|---|
| Avidity Biosciences, Inc. (RNAM) | Chief Scientific Officer | 17 | — | 19 legs · 336,230 sh · $13,498,776 | 31 |
| Atrium Therapeutics, Inc. (RNA) | Director | 1 | — | — | 1 |
Form 4 filings — Flanagan W. Michael
| Filed | Form | Issuer | Reported transactions | Source |
|---|---|---|---|---|
| 2026-03-02 | 4 | Atrium Therapeutics, Inc. (RNA) | Grant/award (A): 20,000 (derivative) @ $0 | EDGAR |
| 2026-02-27 | 4 | Avidity Biosciences, Inc. (RNAM) | Disposition to issuer (D): 150,365 · Disposition to issuer (D): 25,000 (derivative) · Disposition to issuer (D): 66,500 (derivative) · Disposition to issuer (D): 96,000 (derivative) · Disposition to issuer (D): 72,000 (derivative) · Disposition to issuer (D): 88,000 (derivative) · +1 more | EDGAR |
| 2026-01-23 | 4 | Avidity Biosciences, Inc. (RNA) | Sale (S): 3,976 @ $72.45 · Sale (S): 2,558 @ $72.45 | EDGAR |
| 2026-01-09 | 4 | Avidity Biosciences, Inc. (RNA) | Sale (S): 2,373 @ $72.23 | EDGAR |
| 2025-12-19 | 4 | Avidity Biosciences, Inc. (RNA) | Grant/award (A): 27,500 @ $0 · Tax withholding (F): 13,695 @ $71.87 | EDGAR |
| 2025-09-12 | 4 | Avidity Biosciences, Inc. (RNA) | Option exercise (M): 20,000 @ $14.22 · Sale (S): 20,000 @ $38.94 · Option exercise (M): 20,000 (derivative) @ $0 | EDGAR |
| 2025-06-12 | 4 | Avidity Biosciences, Inc. (RNA) | Option exercise (M): 20,000 @ $14.22 · Sale (S): 20,000 @ $32.88 · Option exercise (M): 20,000 (derivative) @ $0 | EDGAR |
| 2025-03-21 | 4 | Avidity Biosciences, Inc. (RNA) | Sale (S): 11,780 @ $31.06 | EDGAR |
| 2025-03-12 | 4 | Avidity Biosciences, Inc. (RNA) | Option exercise (M): 20,000 @ $14.22 · Sale (S): 20,000 @ $30.13 · Option exercise (M): 20,000 (derivative) @ $0 | EDGAR |
| 2025-01-23 | 4 | Avidity Biosciences, Inc. (RNA) | Sale (S): 3,860 @ $28.60 · Sale (S): 1,812 @ $28.59 | EDGAR |
| 2025-01-08 | 4 | Avidity Biosciences, Inc. (RNA) | Grant/award (A): 25,000 @ $0 · Grant/award (A): 50,000 (derivative) @ $0 | EDGAR |
| 2024-12-19 | 4 | Avidity Biosciences, Inc. (RNA) | Sale (S): 12,742 @ $32.66 | EDGAR |
| 2024-12-13 | 4 | Avidity Biosciences, Inc. (RNA) | Option exercise (M): 24,000 @ $22.47 · Sale (S): 24,000 @ $35.77 · Option exercise (M): 24,000 (derivative) @ $0 | EDGAR |
| 2024-10-03 | 4 | Avidity Biosciences, Inc. (RNA) | Option exercise (M): 62,500 @ $26.75 · Sale (S): 62,500 @ $47.62 · Option exercise (M): 62,500 (derivative) @ $0 | EDGAR |
| 2024-09-23 | 4 | Avidity Biosciences, Inc. (RNA) | Grant/award (A): 25,000 @ $0 · Sale (S): 13,153 @ $44.00 · Grant/award (A): 25,000 @ $0 · Sale (S): 11,847 @ $43.89 | EDGAR |
| 2024-09-13 | 4 | Avidity Biosciences, Inc. (RNA) | Option exercise (M): 62,500 @ $26.75 · Sale (S): 62,500 @ $40.40 · Option exercise (M): 34,000 @ $22.47 · Sale (S): 34,000 @ $40.40 · Sale (S): 14,894 @ $40.40 · Option exercise (M): 62,500 (derivative) @ $0 · +1 more | EDGAR |
| 2024-06-20 | 4 | Avidity Biosciences, Inc. (RNA) | Grant/award (A): 25,000 @ $0 · Sale (S): 10,106 @ $39.13 · Grant/award (A): 25,000 @ $0 | EDGAR |
| 2024-01-23 | 4 | Avidity Biosciences, Inc. (RNA) | Grant/award (A): 20,000 @ $0 · Sale (S): 4,129 @ $10.13 · Grant/award (A): 88,000 (derivative) @ $0 | 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.
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