Overview
Regulatory filings made public through February 1, 2026 revealed a series of substantial insider purchases and programmed disposals across a range of U.S.-listed companies. The disclosures include both large strategic acquisitions by major shareholders and multiple sales executed under pre-arranged plans or through related entities. The activity spans mining, insurance, industrials, cloud infrastructure, streaming media and emerging nuclear energy companies.
Top insider buys
Hycroft Mining Holding Corp. - The most sizeable individual acquisition disclosed was by ten-percent owner Eric Sprott. Acting through 2176423 Ontario Ltd., Sprott purchased 200,000 shares of Class A common stock at $45.99 per share, for an aggregate consideration of $9,198,000. The filing notes that the purchase occurred while Hycroft shares have experienced high short-term volatility - declining 26% over the prior week and trading at $37.35, below the price paid by Sprott. After the transaction, Sprott is recorded as indirectly owning 36,753,704 shares via Sprott Mining Inc., a wholly-owned subsidiary of 2176423 Ontario Ltd.
Berkley W R Corp. - Mitsui Sumitomo Insurance Co., LTD, a ten-percent owner, completed three purchases across January 29-30, 2026, acquiring a combined stake valued at about $33 million. The transactions comprised 262,282 shares at a weighted average price of $68.0816, an additional 27,718 shares at $68.5605, and 195,000 shares at $68.3611. Post-purchases, Mitsui Sumitomo Insurance directly holds 56,103,435 shares of Berkley.
International Paper - CEO Andrew K. Silvernail bought 50,000 shares of common stock on January 30 for roughly $1.99 million. The filings show an average purchase price of $39.9793, with trade prices ranging from $39.80 to $40.26. The disclosure notes the stock has fallen more than 6% over the past week and nearly 25% over the past year, even as it carries a 4.59% dividend yield and a history of 56 consecutive years of dividend payments.
International Business Machines - Director David N. Farr purchased 1,000 shares on January 30 at $304.00 per share, for a total of $304,000. The filing records that Farr now directly owns 9,258 shares of IBM.
NB Bancorp, Inc. - Director Mary Susan Elliott reported two purchases: 10,000 shares on January 24, 2025 at $18.72 per share ($187,200) and 1,434 shares on May 2, 2025 at $21.39 per share ($30,673), together totaling $217,873. The disclosure indicates that following the first purchase Elliott directly owned 115,761 shares, with additional holdings indirectly held by her spouse.
Top insider sells
CoreWeave, Inc. - CEO and President Michael N. Intrator, a director and ten-percent owner, sold a total of $8.7 million in Class A common stock on January 28. These sales were carried out under a pre-arranged 10b5-1 trading plan. Prices in the reported transactions ranged from $103.611 to $113.8728 per share. Intrator sold 47,455 shares directly for approximately $4.9 million, and additional shares were sold through Omnadora Capital LLC, where Intrator is the sole manager, for about $3.8 million.
Netflix - Co-CEO Gregory K. Peters sold 105,781 shares on January 29 under a 10b5-1 arrangement, in transactions totaling approximately $8.7 million. The filings show two tranches: 98,221 shares sold at a weighted average price of $82.8728 (range $82.37 to $83.3692) and 7,560 shares at a weighted average price of $83.7538 (range $83.37 to $84.35).
Nano Nuclear Energy Inc. - A cluster of related filings show significant insider liquidity events on January 28-29. CEO James John Walker sold 204,990 shares on January 28 for about $6.6 million, at prices ranging from $33.6438 to $35.2733. On that same day Walker exercised options to acquire 170,000 shares at an exercise price of $1.50, for total consideration of $255,000. Separately, ten-percent owner I Financial Ventures Group LLC reported sales on January 28-29 totaling $16.78 million at prices between $30.7623 and $35.25. Company President and Chairman Yu Jiang, indirectly through I Financial Ventures Group LLC, sold 507,621 shares on January 28-29 at prices in the same range, producing proceeds of approximately $16.8 million.
Context and caution for investors
These disclosures provide windows into insider positioning but do not, on their own, establish causation about company prospects. The filings in this set include both large purchases - which can be interpreted as commitments of capital by insiders or major holders - and programmed or related-party sales, which may reflect pre-arranged liquidity plans or internal rebalancing. Market participants should weigh these transactions alongside fundamental metrics and broader market dynamics when forming views.