Company Overview - Tango Therapeutics, Inc. is a clinical-stage biotechnology company focused on discovering and developing novel cancer therapies using synthetic lethality, targeting genetically-defined tumors [7][8] - The company has a strategic collaboration with Gilead Sciences, Inc. for the development and commercialization of cancer therapies [8][9] - As of October 23, 2025, Tango Therapeutics had a market capitalization of $1.05 billion and a revenue of $24.30 million for the trailing twelve months (TTM) [6] Transaction Summary - Third Rock Ventures IV, L.P. sold 477,401 shares of Tango Therapeutics on October 23, 2025, for a total transaction value of approximately $4.85 million [2][3] - Post-transaction, Third Rock Ventures IV, L.P. holds 13,386,574 shares, representing 12.03% of the outstanding shares [3][5] - The sale represented 3.44% of Third Rock Ventures IV, L.P.'s direct ownership as of the transaction date [3] Market Context - The shares were sold at a price of approximately $10.15, which was the weighted average purchase price for the transaction [4] - The stock price had increased nearly 160% in 2025 through October 30, and reached a 52-week high on October 16, 2025 [10][11] Financial Performance - Tango Therapeutics reported a significant decline in revenue in 2025, with Q2 sales of $3.2 million compared to $19.9 million in the same quarter of the previous year [12] - The company experienced an operating loss of $41 million in Q2 2025 [12] Investment Considerations - The sale by Third Rock Ventures is viewed as profit-taking, but the venture capital fund still maintains a significant investment in Tango Therapeutics [10][11] - The current price-to-sales ratio of Tango Therapeutics is 35, indicating that shares may be considered expensive at this time [13]