Donald A Bergstrom
CIK 1709772 · President, R&D · last filed 2026-01-29
"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
$6.26M
Companies
3
Total Filings
61
Lifetime Open-Market Net
-$10.16M
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 |
|---|---|---|---|---|---|---|---|
| RLAY | President, R&D | 422,733 | $14.81 | $6.26M | -$10.16M | 55 | 2026-01-29 |
| Fusion Pharmaceuticals Inc. (FUSN) Delisted | Director | — | $21.55 | — | $0 | 5 | 2024-06-04 |
| Mersana Therapeutics, Inc. (MRSN) Delisted | Chief Medical Officer | — | $29.08 | — | $0 | 1 | 2018-02-06 |
Recent Filings · Page 2 of 7
61 filingsForm 4 transactions across all companies, newest first.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2024-10-01 | RLAY | Sell (S) | −648 | -$4.9K | EDGAR |
| 2024-07-31 | RLAY | Sell (S) | −2,698 | -$23.9K | EDGAR |
| 2024-07-01 | RLAY | Sell (S) | −648 | -$4.1K | EDGAR |
| 2024-06-04 | Fusion Pharmaceuticals Inc. (FUSN) Delisted | Disp (D) | — | $0 | EDGAR |
| 2024-04-29 | RLAY | Sell (S) | −2,686 | -$17.1K | EDGAR |
| 2024-03-29 | RLAY | Sell (S) | −765 | -$5.9K | EDGAR |
| 2024-01-31 | RLAY | Sell (S) | −3,178 | -$30.6K | EDGAR |
| 2024-01-18 | RLAY | Grant (A) | +300,000 | $0 | EDGAR |
| 2023-12-29 | RLAY | Sell (S) | −977 | -$11.2K | EDGAR |
| 2023-11-01 | RLAY | Sell (S) | −3,451 | -$20.8K | 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.