Friday’s Insider Moves: Major Buys in Biotech, Significant Sells in Tech

Published 13/10/2025, 14:02
© Reuters.

This article summarizes the top insider buys and sells reported for US stocks on Friday, October 10, 2025.

Top Buys:

OrbiMed Advisors LLC made a significant investment in Adicet Bio, Inc. (NASDAQ:ACET) on Friday. The company, along with its affiliated entities, purchased 5,000,000 shares at $1.00 per share, totaling $5,000,000. The transaction was split between OrbiMed Private Investments V, LP, which acquired 1,500,000 shares, and OrbiMed Private Investments VI, LP, which bought 3,500,000 shares. Currently, ACET is trading near its 52-week low at $0.97, with a price-to-book ratio of 0.57x, potentially indicating undervaluation.

Cullinan Therapeutics, Inc. (NASDAQ:CGEM) saw substantial insider buying from Lynx1 Capital Management LP and Weston Nichols. The biotech company, with a market cap of $437.74 million, received investments totaling $9,826,941 through three separate transactions. The purchases occurred between October 8 and October 10, 2025, with share prices ranging from $6.46 to $7.3617. Notably, CGEM’s stock has gained over 25% in the past week.

RENN Fund, Inc. (EXCHANGE:RCG) reported insider buying from its President and Co-Portfolio Manager, Murray Stahl. On Friday, Stahl acquired 1,130 shares at $2.62 per share, for a total value of $2,971. The purchases were made through various entities, including direct purchases by Stahl and indirect acquisitions through related companies and family members. RCG, currently trading at $2.58, has shown strong momentum with a 15.8% year-to-date return and boasts a "GREAT" financial health score of 3.19.

Horizon Kinetics Asset Management LLC made a small but notable purchase of Texas Pacific Land Corp (NYSE:TPL) stock. The company bought a single share at $936.32 on Friday. TPL, valued at $20.5 billion, has impressive gross profit margins of 94.5% and a "GREAT" financial health rating. The company has maintained dividend payments for 12 consecutive years, with a current yield of 0.7%.

Top Sells:

CoreWeave, Inc. (CRWV) saw significant insider selling activity from Magnetar Funds and related entities. On Friday, the group sold shares worth $128,070,413, with prices ranging from $139.48 to $142.89 per share. The transactions involved multiple sales at various price points, slightly above the current trading price of $138.43. Despite the selling, CRWV has shown remarkable performance with a 246% return year-to-date.

In another set of transactions, Magnetar Financial LLC and affiliated entities sold 181,000 shares of CoreWeave , Inc. (CRWV) Class A Common Stock on Friday. The sales were executed at prices between $144.55 and $151.31, totaling $26,807,874. These sales come as CoreWeave’s stock has surged 246% year-to-date, with the company now valued at $74.18 billion.

Additional sales of CoreWeave, Inc. (CRWV) stock were reported by Magnetar Financial LLC and related entities. They sold shares worth $30.9 million at prices ranging from $144.55 to $151.31. The sales involved various Magnetar Funds, including Magnetar Structured Credit Fund, LP and Magnetar Xing He Master Fund Ltd.

Investors should stay tuned to insider buys and sells as they can provide valuable insights into a company’s prospects. While insider transactions alone should not be the basis for investment decisions, they can offer clues about management’s confidence in the company’s future performance. However, it’s important to consider these moves in the context of broader market trends and company fundamentals.

This article was generated with the support of AI and reviewed by an editor. For more information see our T&C.

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