Overview
This report summarizes the most material insider transactions disclosed for U.S. listed companies on Tuesday. The activity spans sizable purchases by several corporate officers and directors and large-scale sales by chief executives, financial officers and affiliated investment firms. The reported trades include direct purchases, indirect acquisitions through trusts, vestings of performance-based equity and transactions executed under established trading plans. The filings show a mixture of confidence-driven buying and monetizations carried out for reasons described in the reports.
Top buys
Installed Building Products, Inc. (IBP)
Michael Thomas Miller, who serves as Executive Vice President and Chief Financial Officer of Installed Building Products, acquired 2,400 shares of the company's common stock on May 11, 2026. The total reported value of the purchase was $498,771, with execution prices spanning from $204.10 to $217.905 per share. The transaction increased Mr. Miller's direct holdings in the company. The filing highlights that the purchases occurred as Installed Building Products' shares have retreated 28% over the prior week and were trading 42% below their 52-week high of $349 at the time of the transaction.
Portillo's Inc. (NASDAQ: PTLO)
Director Eugene I. Lee Jr. reported an indirect acquisition of 70,165 shares of Portillo's Class A common stock on May 11, 2026. The shares were purchased via a family trust at a weighted average price of $4.28, with transactions executed across price points from $4.23 to $4.32 per share, inclusive. The aggregate value of the purchase was approximately $300,306. The filing notes that Portillo's stock was trading near its 52-week low of $4.03 and has declined 67% over the past year. The sale-side commentary referenced InvestingPro analysis that places Portillo's among companies on the Most Undervalued list at current levels.
Bob's Discount Furniture, Inc. (NASDAQ: BOBS)
William G. Barton, Chief Executive Officer and President of Bob's Discount Furniture, acquired a total of $302,788 worth of the company's common stock across transactions executed between May 8 and May 12, 2026. On May 8 specifically, Mr. Barton directly purchased 22,150 shares at a weighted average price of $13.56 per share. The range of prices for the transactions spanned $12.17 to $13.56 per share, with some trades explicitly reported at prices between $13.51 and $13.61.
Black Stone Minerals, L.P. (NYSE: BSM)
Thomas L. Carter Jr., Executive Chairman and a Director of Black Stone Minerals, purchased common units representing limited partner interests in the partnership across three separate transactions occurring between May 8 and May 12, 2026. Carter acquired a total of 67,758 units at weighted average prices ranging from $13.3186 to $13.4754 per unit, for an aggregate outlay of approximately $909,335. One specific entry in the filings shows that on May 8 Carter purchased 23,604 units at a weighted average price of $13.3186 per unit, with the executed prices in that set running from $13.29 to $13.34, inclusive. After these purchases, the filing shows Carter directly held 3,637,450 units. The disclosure also notes that BSM traded at $13.52 at the time of the filings, that InvestingPro analysis lists the partnership on its Most Undervalued list, and that the company offered an appealing 8.97% dividend yield while having paid dividends for 12 consecutive years.
Top sells
FLEX LTD. (NASDAQ: FLEX)
Revathi Advaithi, Chief Executive Officer of FLEX, sold 114,090 ordinary shares of the company on May 11, 2026, for total proceeds of roughly $16.2 million. The sales were executed at prices ranging from $138.4236 to $144.815 per share. The filings indicate these dispositions came while FLEX shares were trading near their 52-week high of $145.40 after delivering a 234% return over the prior year. InvestingPro's commentary cited in the disclosure characterized the stock as presently overvalued relative to its Fair Value and reported a P/E ratio of 62.11. The filings also explain that these sales followed Ms. Advaithi's acquisition of 255,062 ordinary shares on May 8, 2026, at a reported price of $0.00 per share; those shares represented performance-based restricted share units that had been awarded on June 14, 2023, and fully vested on May 8, 2026, after certification of the attainment of specified performance targets for the three-year period ending March 31, 2026. The reported sales were made to satisfy tax withholding obligations associated with that vesting event.
Howmet Aerospace Inc. (NYSE: HWM)
Neil Edward Marchuk, Executive Vice President and Chief Accounting Officer of Howmet Aerospace, sold 41,932 shares of common stock on May 11, 2026. The proceeds from those sales are reported at approximately $11,300,535, with executed prices ranging from $266.03 to $271.76 per share. The filings place these sales near Howmet's 52-week high of $280.74. After the transactions, Mr. Marchuk retained direct ownership of 65,105 shares of Howmet common stock. The disclosure also notes that Mr. Marchuk indirectly holds 10 shares through a revocable trust for which he is trustee and beneficiary, and that Howmet's shares have appreciated 71% over the past year, trading at $269.78 with a market capitalization reported at $108.1 billion. InvestingPro commentary included in the filing described the stock as appearing overvalued relative to its Fair Value.
TWILIO INC (NASDAQ: TWLO)
Director Andrew J. Stafman, together with Sachem Head Capital Management LP and related reporting persons, sold 675,000 shares of Twilio Class A common stock on May 12, 2026, at a reported per-share price of $193.54, yielding total proceeds of roughly $130,639,500. The filings note that Twilio shares were trading near their 52-week high of $203.71 at the time of the sale and had risen 68% over the previous year. InvestingPro analysis referenced in the public disclosure described the stock as overvalued relative to its Fair Value and reported a P/E ratio of 293. The reporting persons for the transaction included Sachem Head Capital Management LP, Uncas GP LLC, Sachem Head GP LLC, and Scott D. Ferguson, in addition to Mr. Stafman. The filing states Mr. Stafman is a partner at Sachem Head and that other reporting persons could be treated as de facto directors of Twilio by deputization because of their relationship with Sachem Head. The sale was conducted indirectly through various affiliated funds, including Sachem Head LP, Sachem Head Master LP, and SH Stony Creek Master Ltd., for which Sachem Head Capital Management LP acts as investment adviser.
Lumentum Holdings Inc. (NASDAQ: LITE)
Director Lillie Brian sold a total of 12,071 shares of Lumentum common stock on May 11, 2026, generating proceeds reported at $11,731,561. The disclosed trade prices ranged from $950.99 to $1,003.617 per share, and the filings indicate the sales were executed across multiple transactions that produced weighted average prices in the stated price bands. At the time of the filing Lumentum shares were trading at $992.62, close to a 52-week high of $1,085.68, and the stock had returned 1,283% over the past year, and 291% over the prior six months. The filings note that the sales were effected pursuant to a Rule 10b5-1 trading plan that Ms. Brian established on February 6, 2026.
Impinj Inc. (NASDAQ: PI)
Sales of Impinj common stock attributed to Sylebra Capital LLC, identified in the filings as a director of the company, totaled approximately $11.3 million. The dispositions took place on May 8 and May 11, 2026, with 73,810 shares sold across multiple transactions at prices ranging from $149.97 to $154.46 per share. The disclosure shows that Impinj traded at $148.25 at the time, down from the previous close of $153.74, while still delivering a 32% return over the past year. Following the reported sales, Sylebra Capital LLC's indirect ownership in Impinj is listed at 1,022,171 shares. InvestingPro analysis cited in the filing characterized the stock as appearing overvalued at current levels, noting a Price/Book multiple of 22.15.
Interpreting the filings
The filings present a mixture of signaling and routine transactions. Several purchases were made when shares were trading well below prior highs, while several sales coincided with elevated prices or valuations. Where noted, certain buy-side filings referenced InvestingPro's Most Undervalued list, and sell-side filings referenced InvestingPro assessments that described particular stocks as overvalued relative to Fair Value and reported valuation multiples such as P/E and Price/Book. Some sales were tied to the vesting of performance-based restricted share units and the need to cover associated tax-withholding obligations, while other dispositions were carried out under pre-established trading plans or through indirect fund instruments.
What investors should keep in mind
- Insider purchases can signal confidence by executives and directors, but filings alone do not prove future stock performance.
- Insider sales are often driven by non-discriminatory personal needs, including tax obligations related to equity vesting, planned diversification, or liquidity events implemented under Rule 10b5-1 plans.
- Where filings reference third-party valuation commentary, such as InvestingPro's assessments, those are included in the disclosures and present one analytical viewpoint about relative valuation that readers may weigh alongside other information.
This roundup focuses solely on the material transactions that were disclosed in the public filings and reported on Tuesday. The disclosures provide transactional detail, including the number of shares or units, price ranges, and dates, as presented in the filings.
Note: This report summarizes the contents of regulatory filings and related disclosures. The descriptions above reflect the information contained in those filings and the valuation commentary cited therein.