W. Michael Flanagan
CIK 1841990 · Chief Scientific Officer · last filed 2026-03-02
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
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Disclosed Exposure
$1.01M
Companies
2
Total Filings
29
Lifetime Open-Market Net
-$13.50M
Holdings By Company
Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| Avidity Biosciences, Inc. (RNAM) Delisted | Chief Scientific Officer | 0 | — | — | $0 | 1 | 2026-02-27 |
| RNA | Chief Scientific Officer | 87,651 | $11.49 | $1.01M | -$13.50M | 20 | 2026-01-23 |
Recent Filings · Page 3 of 3
29 filingsInsider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2024-09-23 | RNA | Mixed | +25,000 | -$1.10M | EDGAR |
| 2024-09-13 | RNA | Mixed | −14,894 | -$2.06M | EDGAR |
| 2024-09-11 | Avidity Biosciences, Inc. (RNAM) Delisted | Notice (144) | −111,394 | -$4.54M | EDGAR |
| 2024-06-20 | RNA | Mixed | +39,894 | -$395.4K | EDGAR |
| 2024-01-23 | RNA | Mixed | +15,871 | -$41.8K | EDGAR |
| 2023-09-12 | RNA | Grant (A) | — | $0 | EDGAR |
| 2023-01-24 | RNA | Grant (A) | +40,000 | $0 | EDGAR |
| 2022-03-15 | RNA | Grant (A) | — | $0 | EDGAR |
| 2021-01-25 | RNA | Grant (A) | — | $0 | EDGAR |
Showing 21–29 of 29
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Page 3 of 3
Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.