Third Rock Ventures GP IV, L.P. insider trades
Third Rock Ventures GP IV, L.P. has filed 7 Form 4s with the SEC that we hold, for Tango Therapeutics, Inc. (TNGX) (10% owner) and Dianthus Therapeutics, Inc. /DE/ (MGTA) (10% owner). Across all of them we count 0 purchases worth $0 and 10 sales worth $24.2M reported on Form 4. None of these purchases or sales is dated in the last 12 months. The largest single trade was a sale of 1,100,000 shares of Tango Therapeutics, Inc. worth $7.7M, dated 2025-08-19. The first filing on our record is dated 2021-08-26 and the latest 2025-08-26.
Tango Therapeutics, Inc. (TNGX)
| Trade date | Code | Shares | Value as filed | Filed |
|---|---|---|---|---|
| 2024-07-17 | S, sale reported on Form 4 | 550,171 | $5.4M | 2024-07-18 |
| 2024-07-22 | S, sale reported on Form 4 | 262,740 | $2.6M | 2024-07-24 |
| 2024-07-23 | S, sale reported on Form 4 | 125,000 | $1.2M | 2024-07-24 |
| 2024-07-30 | S, sale reported on Form 4 | 95,000 | $931.0K | 2024-08-01 |
| 2024-07-31 | S, sale reported on Form 4 | 100,000 | $993.0K | 2024-08-01 |
| 2024-08-01 | S, sale reported on Form 4 | 40,000 | $392.0K | 2024-08-01 |
| 2024-08-16 | S, sale reported on Form 4 | 135,000 | $1.3M | 2024-08-20 |
| 2024-08-19 | S, sale reported on Form 4 | 150,000 | $1.5M | 2024-08-20 |
| 2025-08-19 | S, sale reported on Form 4 | 1,100,000 | $7.7M | 2025-08-21 |
| 2025-08-22 | S, sale reported on Form 4 | 302,194 | $2.1M | 2025-08-26 |
Dianthus Therapeutics, Inc. /DE/ (MGTA)
No purchase or sale of common stock reported here; these filings cover grants, option exercises or other codes.
Counted from the Form 4 filings this reporting owner (SEC CIK 1688326) filed on EDGAR. Values are the transaction values as filed. See every filing on EDGAR, or browse insider buying and today's insider purchases.
Source: U.S. Securities and Exchange Commission (EDGAR) and other official
government data · Updated 2026-10-12 ·
For informational purposes only, not investment advice.
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