Tuesday’s insider activity: Big buys at Radian and MasterBrand

Here’s a roundup of the most significant insider buying and selling activity disclosed on Tuesday for US stocks.

Radian Group Inc. (NYSE:RDN) saw its incoming Chief Executive Officer Michael S. Weinbach make a substantial vote of confidence in the company, purchasing approximately $5.77 million worth of common stock. Mr. Weinbach acquired a total of 170,000 shares over two days, with prices ranging from $33.8852 to $34.0429 per share. According to InvestingPro data, the purchase aligns with broader management confidence, as the company has been aggressively buying back shares while maintaining a dividend yield of 3.02%. With a P/E ratio of 7.9 and market cap of $4.5 billion, analysis suggests the stock is currently undervalued relative to its Fair Value.

MasterBrand, Inc. (NYSE:MBC) experienced significant insider buying from its top executive, as CEO and President R. David Banyard, Jr. acquired 60,000 shares of the company’s common stock on June 1, 2026, for a total value of $505,800. The shares were purchased at prices ranging from $8.33 to $8.49 per share, with a volume-weighted average price of $8.43 per share. Following this transaction, Mr. Banyard directly holds 1,831,788 shares of MasterBrand common stock, which includes 576,339 restricted stock units that have not yet vested and 446,819 shares deferred under the issuer’s deferred compensation plan. According to InvestingPro analysis, MasterBrand currently appears overvalued relative to its Fair Value.

Black Stone Minerals, L.P. (NASDAQ:BSM) attracted director buying as D. Mark DeWalch purchased common units representing limited partner interests totaling $985,353. The transactions occurred over two separate dates, May 29 and June 1, 2026. On May 29, Mr. DeWalch acquired 36,363 common units at a weighted average price of $13.476 per unit, with prices ranging from $13.42 to $13.56. Following this transaction, the indirect holdings by DeWalch Diversified LP increased to 594,885 units. The insider buying comes as BSM trades at $13.60, which InvestingPro analysis suggests is undervalued based on its Fair Value assessment. The partnership offers an attractive 8.78% dividend yield and maintains a Financial Health Score rated as "GOOD."

Connect Biopharma Holdings Ltd (NASDAQ:CNTB) received a vote of confidence from director James Huang, who acquired 150,000 ordinary shares in the company on May 29, 2026. The transaction, valued at $371,610, saw Mr. Huang purchase shares at a weighted average price of $2.4774 per share, with individual transaction prices ranging from $2.37 to $2.52. The stock currently trades at $2.15, below Huang’s purchase price, though the company maintains a current ratio of 3.23, indicating strong liquidity.

Phibro Animal Health Corp. (NASDAQ:PAHC) saw director E. Thomas Corcoran purchase 10,000 shares of the company’s Class A Common Stock on May 29, 2026, for a total value of $317,700. The shares were acquired at a weighted average price of $31.77 per share, with individual transaction prices ranging from $31.66 to $31.85. The purchase came as the stock currently trades at $28.52, down 15% over the past week.

Qorvo, Inc. (NASDAQ:QRVO) experienced the largest insider sale as director Peter A. Feld disposed of company common stock valued at approximately $192.3 million on June 2, 2026. The transactions involved the sale of 1,328,094 shares at an average price of $100.254 per share and an additional 571,906 shares at an average price of $103.409 per share. The sales occurred within a price range of $100.254 and $103.409 per share. The stock currently trades at $102.74, near its 52-week high of $109.49, following a strong 21.6% year-to-date return.

Best Buy Co Inc. (NYSE:BBY) saw Chairman Emeritus Richard M. Schulze sell 500,350 shares of the company’s common stock on May 29, 2026, for a total value of approximately $38.1 million. The shares were sold at prices ranging between $75.0884 and $77.6864 per share. The sale came after the stock posted an 18.6% gain over the prior week, though shares have since retreated to $72.78. The transactions were conducted indirectly through a revocable trust for which Mr. Schulze serves as trustee. Following these sales, the trust’s holdings in Best Buy common stock decreased to 10,930,586 shares. According to InvestingPro analysis, Best Buy appears undervalued at current levels, trading at a P/E ratio of 13.6 with a PEG ratio of just 0.43.

Micron Technology Inc. (NASDAQ:MU) reported that President and CEO Sanjay Mehrotra sold common stock valued at approximately $35.95 million on May 29, 2026. The transactions involved a total of 37,030 shares, with prices ranging from $942.14 to $972.61 per share. The sales were executed pursuant to a Rule 10b5-1 trading plan that Mr. Mehrotra adopted on January 30, 2026. The shares were sold in multiple transactions at varying prices within the stated range.

Ondas Inc. (NASDAQ:ONDS) disclosed that Chairman, CEO, and President Eric A. Brock reported transactions involving company shares totaling approximately $31.9 million. On June 2, 2,378,245 shares of Ondas common stock were sold at a price of $13.43 per share, totaling approximately $31.9 million. This sale was conducted to cover potential tax withholding obligations in connection with the vesting of Mr. Brock’s Restricted Stock Units (RSUs).

CoreWeave, Inc. (NASDAQ:CRWV) experienced selling activity from director Jack D. Cogen, who sold 271,153 shares of Class A Common Stock on May 29, 2026. The transactions totaled $29,004,694, with shares sold at prices ranging from $106.30 to $108.82. These sales were conducted indirectly through CW Holding 987 LLC, an entity for which Mr. Cogen serves as manager. Following these transactions, Mr. Cogen directly holds 261,140 shares of CoreWeave Class A Common Stock and maintains several indirect holdings through various trust entities totaling over 11 million additional shares. The stock currently trades at $119.28, up 14% over the past week, reflecting strong recent momentum despite the insider sale.

Monitoring insider buying and selling activity provides investors with valuable insights into how company executives and directors view their own stock’s prospects. While insider purchases can signal confidence in a company’s future performance, sales may occur for various reasons including portfolio diversification, tax obligations, or pre-planned trading arrangements. Tracking these transactions alongside other fundamental and technical indicators can help investors make more informed investment decisions.

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