Thursday’s Insider Moves: Top Buys and Sells in US Stocks Revealed

Published 12/09/2025, 14:02
© Reuters.

This article summarizes the most significant insider buying and selling activities reported for US stocks on Thursday, September 11, 2025.

Top Insider Buys:

Summit Therapeutics Inc. (NASDAQ:SMMT):

Robert W. Duggan, Co-Chief Executive Officer, Director, and 10% Owner of Summit Therapeutics Inc., made substantial purchases of the company’s common stock in two transactions, totaling $5,984,755. On September 10, Duggan acquired 333,394 shares at a weighted average price of $17.68, and on September 11, he bought an additional 5,000 shares at $18.07 per share. These purchases come as Summit, valued at $13.1 billion, shows signs of being overvalued according to InvestingPro analysis, with the stock down nearly 22% in the past week.

Summit Therapeutics Inc. (NASDAQ:SMMT):

Mahkam Zanganeh, a Director and Co-Chief Executive Officer at Summit Therapeutics Inc., also reported purchasing shares of the company’s common stock in two transactions for a total of $5,984,755. On September 10, Zanganeh acquired 333,394 shares at prices ranging from $17.49 to $17.89, with a weighted average price of $17.68. An additional 5,000 shares were purchased on September 11 at $18.07 per share. These insider buys come as the stock has experienced a significant 21.85% decline over the past week.

Texas Pacific Land Corp (NASDAQ:TPL):

Horizon Kinetics Asset Management LLC, a ten percent owner of Texas Pacific Land Corp, disclosed purchasing 1 share of common stock on September 10 at $923.41. Following the transaction, Horizon Kinetics Asset Management LLC directly owns 1,163,993 shares of the company. Texas Pacific Land Corp, valued at $21.5 billion, currently trades at a P/E ratio of 47x and boasts impressive gross profit margins of 94.5%.

Bankwell Financial Group, Inc. (NASDAQ:BWFG):

Director Lawrence B. Seidman of Bankwell Financial Group, Inc. acquired shares of common stock on September 10 in a series of purchases totaling $489,926. The purchases were made at prices ranging from $44.53 to $44.57, near the stock’s 52-week high of $44.73. Bankwell Financial Group has delivered impressive returns, with a 55% gain over the past six months.

Peoples Financial Corp (NASDAQ:PFBX):

A group including Stilwell Value LLC and Joseph Stilwell, a ten percent owner of Peoples Financial Corp, reported purchasing 2,200 shares of the company’s common stock on September 10 at a price of $20.0909, for a total transaction value of $44,199. The stock, currently trading at $20.1, has gained 9% year-to-date.

Top Insider Sells:

IREN Ltd (FOREIGN:IREN):

Daniel John Roberts, Co-Chief Executive Officer of IREN Ltd, sold 1,000,000 ordinary shares of the company on September 11 at a price of $33.131 per share, totaling $33,131,000. The sale comes as IREN shares trade near their 52-week high of $33.76, with the stock showing remarkable momentum, gaining over 366% in the past six months.

IREN Ltd (NASDAQ:IREN):

William Gregory Roberts, Co-Chief Executive Officer of IREN Ltd, also sold 1,000,000 ordinary shares of the company on September 11 at a price of $33.131 per share, totaling $33,131,000. Following the transaction, Roberts indirectly holds 13,989,696 ordinary shares through the Awassi Capital Trust #1.

CoreWeave, Inc. (CRWV):

Magnetar Financial LLC, a ten percent owner of CoreWeave , Inc., sold 808,372 shares of Class A Common Stock on September 10. The sales were executed at a weighted average price ranging from $118.39 to $118.42, resulting in a total transaction value of $96,131,741. The transaction comes as CoreWeave trades near $112.69, showing a remarkable 181.7% gain over the past year.

CoreWeave, Inc. (CRWV):

Magnetar Financial LLC, along with related entities and individuals, reported selling 573,048 shares of CoreWeave, Inc. Class A Common Stock on September 9 for approximately $59.5 million. The sales were executed at a weighted average price of $103.84.

Nvidia (NASDAQ:NVDA):

Nvidia President and CEO Huang Jen Hsun sold 214,625 shares of the company’s common stock between September 9 and September 11, totaling approximately $39.28 million. The sales occurred at prices ranging from $167.479 to $179.7707, as part of a Rule 10b5-1 trading plan adopted on March 20, 2025.

Investors should stay tuned to insider buying and selling activities as they can provide valuable insights into a company’s prospects. While insider transactions alone should not be the sole 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 conjunction with other fundamental and technical analysis to make informed investment choices.

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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