WILLIAM K HEIDEN
CIK 1214939 · President & CEO · last filed 2026-06-11
"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
$810.3K
Companies
4
Total Filings
53
Lifetime Open-Market Net
-$6.99M
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 |
|---|---|---|---|---|---|---|---|
| ATRA | Director | 34,188 | $10.41 | $355.9K | $25.3K | 14 | 2026-06-11 |
| MGNX | Director | 114,750 | $3.96 | $454.4K | $150.5K | 7 | 2026-05-20 |
| AMAG PHARMACEUTICALS, INC. (AMAG) Delisted | President & CEO | 424,612 | — | — | -$7.16M | 30 | 2020-03-04 |
| GTC BIOTHERAPEUTICS INC (GTCB) Delisted | Director | — | — | — | $0 | 1 | 2009-10-05 |
Recent Filings · Page 6 of 6
53 filingsForm 4 transactions across all companies, newest first.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2012-05-16 | AMAG PHARMACEUTICALS, INC. (AMAG) Delisted | Grant (A) | — | $0 | EDGAR |
| 2010-06-17 | — | Grant (A) | — | $0 | |
| 2009-10-05 | GTC BIOTHERAPEUTICS INC (GTCB) Delisted | Grant (A) | — | $0 | EDGAR |
Showing 51–53 of 53
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Page 6 of 6
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.