Third Rock Ventures IV, L.P.
CIK 1688327 · last filed 2025-09-17
"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
$815.64M
Companies
5
Total Filings
11
Lifetime Open-Market Net
-$2.10B
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 |
|---|---|---|---|---|---|---|---|
| TNGX | 10%+ Owner | 14,363,975 | $30.94 | $444.42M | -$58.00M | 7 | 2025-09-17 |
| RLAY | 10%+ Owner | 9,767,382 | $14.81 | $144.65M | -$2.04B | 1 | 2021-01-14 |
| RVMD | 10%+ Owner | 1,419,900 | $153.87 | $218.48M | $0 | 1 | 2020-02-18 |
| FULC | 10%+ Owner | 2,343,154 | $3.45 | $8.08M | $3.90M | 1 | 2019-07-22 |
| Dianthus Therapeutics, Inc. /DE/ (MGTA) Delisted | 10%+ Owner | 8,008,204 | $11.19 | $89.64M | $0 | 1 | 2018-06-27 |
Recent Filings · Page 2 of 2
11 filingsForm 4 transactions across all companies, newest first.
| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2018-06-27 | Dianthus Therapeutics, Inc. /DE/ (MGTA) Delisted | Conv (C) | +23,734,365 | $0 | EDGAR |
Showing 11–11 of 11
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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.