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This article summarizes the most significant insider buys and sells reported for US stocks on Tuesday, August 19, 2025.
Top Insider Buys:
Atara Biotherapeutics, Inc. (NASDAQ:ATRA) saw Director James Huang purchase 55,000 shares of common stock on August 15, 2025. The shares were bought at a weighted average price of $12.1895, ranging from $11.83 to $12.44, for a total transaction value of $670,422. Following the transaction, Huang directly and indirectly owns 1,405,000 shares of Atara Biotherapeutics. The purchase comes amid strong momentum, with the stock delivering returns of 52.66% over the past six months.
Iridex Corp (NASDAQ:IRIX) reported two insider purchases. Director William M. Moore acquired 12,024 shares of common stock on August 18, 2025, at a weighted average price of $1.1834, for a total transaction value of $14,229. Additionally, Chief Financial Officer Romeo R. Dizon purchased a total of 1,500 shares in two transactions on the same day, with prices ranging from $1.1723 to $1.19, for a total value of $1,766.
Mercantile Bank Corp (NASDAQ:MBWM) Director David B. Ramaker acquired 1,500 shares of common stock on August 18, 2025. The shares were purchased at a price of $46.71, for a total transaction value of $70,065. Following the transaction, Ramaker directly owns 15,014 shares of Mercantile Bank Corp.
Sandridge Energy Inc (NASDAQ:SD) Director Intrieri Vincent J. purchased 25,000 shares of common stock on August 18, 2025. The shares were bought at prices ranging from $10.925 to $10.98, with a weighted average price of $10.9619, for a total transaction value of $274,047.
Top Insider Sells:
CoreWeave, Inc. (CRWV) saw significant selling activity from Magnetar Financial LLC, a ten percent owner. On August 15, 2025, Magnetar sold 915,767 shares of Class A Common Stock at a price of $100.15, resulting in a total transaction value of $91,675,507. Additionally, on August 18, 2025, Magnetar sold another 544,222 shares at prices ranging from $100.78 to $100.82, for a total value of approximately $55.4 million.
Ares Management Corp (NYSE:ARES) Co-Founder and CEO Michael J. Arougheti, through Atticus Enterprises LLC, sold a total of 272,509 shares of Class A Common Stock between August 15 and August 19, 2025. The sales, executed under a pre-arranged 10b5-1 trading plan, generated approximately $51.7 million.
Meta Platforms (NASDAQ:META) reported insider selling from two executives. Chief Technology Officer Andrew Bosworth sold 16,751 shares of Class A Common Stock on August 15th and 18th, at prices ranging from $775.00 to $782.13, totaling approximately $12.9 million. Chief Financial Officer Susan J. Li sold a total of 25,291 shares on the same dates for approximately $19.4 million.
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 additional context when combined with other fundamental and technical analysis. Insider buying may signal confidence in the company’s future, while selling could have various interpretations, including portfolio diversification or personal financial needs.
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