Michael F MacLean
CIK 1383731 · Chief Financial Officer · last filed 2026-04-03
"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.
Loading insider history…
Disclosed Exposure
$2.90M
Companies
6
Total Filings
54
Lifetime Open-Market Net
-$16.65M
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 |
|---|---|---|---|---|---|---|---|
| CAMP | Director | — | $4.19 | — | $0 | 1 | 2026-04-03 |
| Avidity Biosciences, Inc. (RNAM) Delisted | Chief Financial Officer | 0 | — | — | $0 | 1 | 2026-02-27 |
| RNA | Chief Financial Officer | 62,025 | $12.37 | $767.2K | -$15.13M | 18 | 2026-01-23 |
| Verve Therapeutics, Inc. (VERV) Delisted | Director | — | $11.13 | — | $0 | 7 | 2025-07-28 |
| AKCEA THERAPEUTICS, INC. (AKCA) Delisted | Chief Financial Officer | 48,000 | — | — | $0 | 6 | 2020-01-16 |
| BIIB | SVP, Chief Accounting Officer | 10,681 | $200.05 | $2.14M | -$1.52M | 21 | 2010-10-04 |
Recent Filings · Page 5 of 6
54 filingsForm 4 transactions across all companies, newest first.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2009-11-03 | BIIB | Mixed | +582 | -$17.6K | EDGAR |
| 2009-10-05 | BIIB | Tax (F) | −953 | -$47.0K | EDGAR |
| 2009-02-26 | BIIB | Grant (A) | +4,030 | $0 | EDGAR |
| 2009-02-17 | BIIB | Tax (F) | −2,007 | -$105.6K | EDGAR |
| 2008-11-04 | BIIB | Mixed | +682 | -$13.5K | EDGAR |
| 2008-10-06 | BIIB | Sell (S) | −2,047 | -$102.3K | EDGAR |
| 2008-10-02 | BIIB | Tax (F) | −953 | -$47.3K | EDGAR |
| 2008-08-01 | BIIB | Mixed | — | -$46.9K | EDGAR |
| 2008-07-24 | BIIB | Sell (S) | −682 | -$47.7K | EDGAR |
| 2008-04-10 | BIIB | Sell (S) | −2,214 | -$142.5K | EDGAR |
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.