Third Rock Ventures VI, L.P.

Third Rock Ventures VI (10% owner) buys 18,861 shares of SEPN at $6.00 on 2025-02-24; cluster pattern with 2 other insiders buying within 14 days amid -79.0% decline from 52-week high.

Third Rock Ventures VI purchased 18,861 shares at $6.00, increasing holdings to 4,211,659 shares (+0.4% vs pre-transaction). This buy arrives during severe price erosion: the stock is -79.0% from its 52-week high of $27.09, -64.7% over 30 days, and -77.0% over 90 days, with current price at $5.70. The transaction is part of a cluster pattern in which 2 other insiders also bought within the past 14 days, including two prior purchases by this same entity on 2025-02-20 and 2025-02-21. Fundamentals remain weak, with the latest quarterly revenue at $176,000.00 and net income at -$20,523,000.00. The timing and clustering of purchases during a steep drawdown warrant examination, though the outcomes of the prior same-ticker trades on 2025-02-20 and 2025-02-21 are not yet measurable.

Third Rock Ventures VI acquired 1,040,342 shares at blended $5.93 (Feb 20–21), expanding stake to 4.19M shares (+33.0%); stock down -78.8% from 52-week high.

Third Rock Ventures VI, a 10% owner, made 2 separate purchases totaling 1,040,342 shares for $6,167,378.00 at a blended average price of $5.93, increasing its holdings by 33.0% to 4,192,798 shares post-transaction. The stock currently trades at $5.73, down -78.8% from its 52-week high of $27.09 and -69.0% over the past 30 days. The timing and scale of this accumulation—executed during a severe drawdown—warrant scrutiny given the company's fundamental challenges: latest quarterly revenue of $176,000.00 against a net loss of $-20,523,000.00. The insider's one prior measurable buy at this ticker is not yet yielding outcome data, and the cross-ticker track record shows only 1 historical buy, leaving no pattern to evaluate timing acumen at this issuer or broadly.