Willard H Dere
CIK 1311569 · 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
$2.78M
Companies
5
Total Filings
61
Lifetime Open-Market Net
-$619.5K
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 |
|---|---|---|---|---|---|---|---|
| MGX | Director | — | $1.20 | — | $0 | 3 | 2026-06-11 |
| BMRN | Director | 46,440 | $55.95 | $2.60M | -$547.6K | 13 | 2026-06-04 |
| Mersana Therapeutics, Inc. (MRSN) Delisted | Director | 0 | $29.08 | $0 | $0 | 17 | 2026-01-06 |
| MCRB | Director | 31,746 | $5.70 | $181.0K | $0 | 10 | 2025-04-11 |
| Radius Health, Inc. (RDUS) Delisted | Director | 1,895 | $30.00 | $56.9K | -$71.9K | 15 | 2022-08-15 |
Recent Filings · Page 4 of 7
61 filingsForm 4 transactions across all companies, newest first.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2021-01-20 | Mersana Therapeutics, Inc. (MRSN) Delisted | Grant (A) | — | $0 | EDGAR |
| 2020-06-30 | BMRN | Sell (S) | −4,430 | -$547.6K | EDGAR |
| 2020-06-29 | Mersana Therapeutics, Inc. (MRSN) Delisted | Grant (A) | — | $0 | EDGAR |
| 2020-06-22 | MCRB | Grant (A) | — | $0 | EDGAR |
| 2020-05-29 | BMRN | Grant (A) | +4,300 | $0 | EDGAR |
| 2020-02-28 | Radius Health, Inc. (RDUS) Delisted | Sell (S) | −1,925 | -$34.6K | EDGAR |
| 2020-02-24 | Radius Health, Inc. (RDUS) Delisted | Grant (A) | +5,500 | $0 | EDGAR |
| 2020-01-03 | Mersana Therapeutics, Inc. (MRSN) Delisted | Grant (A) | — | $0 | EDGAR |
| 2019-06-14 | MCRB | Grant (A) | — | $0 | EDGAR |
| 2019-06-11 | Mersana Therapeutics, Inc. (MRSN) Delisted | Grant (A) | — | $0 | 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.