Overview
Regulatory filings made public on Friday detail a number of notable insider transactions in U.S.-listed equities. The disclosures span purchases executed by company directors and officers as well as large sales by executives and affiliated holders. The activity, reported between May 27 and May 29, 2026, covers both small-cap and large-cap issuers and includes transactions executed under structured plans and option exercises.
Top insider buys
Annexon, Inc. (NASDAQ: ANNX) - Director Muneer A. Satter increased his indirect stake by acquiring 613,497 shares of common stock on May 28, 2026. The shares were purchased at $5.41 each for a total consideration of about $3,319,018. The shares were bought indirectly through Alerce Medical Technology Partners, L.P., with Mr. Satter retaining sole voting and dispositive authority. Following the transaction his indirect holdings in Annexon common stock rose to 10,342,134 shares. In the filing Mr. Satter disclaims beneficial ownership except to the extent of his pecuniary interest. The disclosed purchase occurred as ANNX shares were trading near $5.42, after the stock had risen roughly 146% over the prior year. The filing notes that InvestingPro analysis indicates the stock appears slightly undervalued at current levels and highlights that the company holds more cash than debt and has seen four analysts revise earnings estimates upward among other InvestingPro tips.
Cardinal Infrastructure Group Inc. (CDNL) - Chief Operating Officer Benjamin Wood reported purchases of Class A Common Stock totaling $1,025,900 on May 27, 2026. The acquisitions were executed across multiple transactions at prices in the range of $49.89 to $54.33 per share. The filing records several tranches during the day: 6,739 shares purchased between $49.32 and $50.31 per share; 5,355 shares bought between $50.36 and $51.35 per share; 4,206 shares acquired at prices from $51.42 to $52.37; 3,600 shares purchased between $53.31 and $54.30; and a final block of 100 shares at $54.33. The trades came as CDNL shares were trading near $52.06, following a 125% advance over the prior six months. The disclosure notes InvestingPro analysis flags the stock as overvalued relative to its Fair Value while analysts maintain price targets in a $60-63 range.
Autodesk (NASDAQ: ADSK) - Director Stacy J. Smith bought company common stock on May 29, 2026, with the total disclosed value of the purchases amounting to $794,054. The filings show a total of 3,435 shares acquired at weighted average prices between $230.48 and $231.34 per share. One tranche of 696 shares was recorded at an average weighted price of $230.48, reflecting individual trade prices between $229.77 and $230.76. A larger block of 2,739 shares was acquired at a weighted average of $231.34 per share, with prices executed between $230.79 and $231.62. The stock was trading near $231 at the time of the filing and has declined about 24% over the last six months; InvestingPro analysis in the filing suggests the share price appears undervalued at current levels.
Global Partners LP (NASDAQ: GLP) - The general partner, Global GP LLC, purchased 15,000 common units across transactions completed between May 27 and May 29, 2026, according to the disclosure. The weighted average prices for the units ranged from $47.22 to $48.94. The reporting breaks the activity into three equal lots of 5,000 units: on May 27, 5,000 units at a weighted average price of $48.94 (with executions from $48.63 to $49.25); on May 28, 5,000 units at an average of $48.35 (range $47.98 to $48.65); and on May 29, 5,000 units at a weighted average of $47.22 (range $46.95 to $48.03). The SEC filing documents the step-up purchases by the general partner over the three-day span.
AutoZone Inc. (NYSE: AZO) - Director Brian Hannasch reported the acquisition of 165 shares of common stock on May 29, 2026, at $2,987.00 per share, for a total of $492,855. The purchase was disclosed as occurring while AutoZone shares traded near a 52-week low identified in the filing as $2,945, with the current trading price noted as $2,935.19.
Top insider sells
Snowflake Inc. (NYSE: SNOW) - Director Frank Slootman sold 400,000 shares of common stock on May 28, 2026, generating gross proceeds of about $93.3 million. The shares were sold at prices between $230.174 and $237.289 per share. The filing indicates that the sales followed the exercise of 400,000 stock options at $8.88 per share, representing an acquisition cost of $3,552,000. The options were fully vested with an expiration date of May 28, 2029, and both the option exercise and subsequent stock sales were carried out under a pre-arranged 10b5-1 trading plan Mr. Slootman adopted on September 19, 2025. The stock was reported trading at $255.55 at the time of the disclosure, having jumped about 48% over the prior week and reflecting a market capitalization in the disclosure of $88 billion.
Symbotic Inc. (NASDAQ: SYM) - SoftBank Group Corp. and affiliated entities sold a substantial block of 5,590,000 shares of Class A Common Stock on May 27, 2026. The reported proceeds from the sales totaled approximately $281,819,850, with the per-share sale price stated as $50.415. The filing notes the stock had retreated to $46.42 following the sales, representing a 14% decline over the preceding week. After the disposition, SVF Sponsor III (DE) LLC, an entity indirectly controlled by SoftBank Group Corp., no longer holds shares of Symbotic.
CoreWeave, Inc. (NASDAQ: CRWV) - Director Jack D. Cogen sold 742,307 shares of Class A Common Stock across multiple transactions on May 27 and May 28, 2026, for approximately $78,668,181 in aggregate proceeds. The weighted average prices for the disposition ranged from $103.77 to $108.2009 per share. An itemized sale on May 27 shows 100,000 shares sold at a weighted average price of $103.77, with executions between $103.50 and $104.12. The filings appear against the backdrop of CoreWeave shares trading at $109.57 and a six-month return of 46%. Despite the insider selling, InvestingPro analysis included in the disclosure suggests the stock remains undervalued with a Fair Value estimate of $116.90. The filing also notes company metrics quoted in the filing such as a gross profit margin of 69% and trailing twelve-month negative EPS of -$3.15, and lists a company valuation stated as $58.3 billion.
Airbnb, Inc. (NASDAQ: ABNB) - CEO and Chairman Brian Chesky sold a total of 515,296 shares of Class A Common Stock across May 27 and May 28, 2026. The Form 4 filings show the sales produced aggregate proceeds of $68,365,968 with per-share prices ranging from $129.824 to $134.4372. The disclosure states the trades were made under a Rule 10b5-1 trading plan Mr. Chesky adopted on February 26, 2026. The filing notes the stock was trading at $133.29 at the time, near a stated 52-week high of $147.25 and with a market capitalization listed as $79.07 billion.
Walmart Inc. (NYSE: WMT) - The Walton Family Holdings Trust, identified in the filing as a 10% owner of Walmart, reported sales of common stock totaling about $54.97 million across two transactions on May 27 and May 28, 2026. A Form 4 filed with the SEC shows the trust disposed of 254,178 shares on May 27 at a weighted average price of $119.054 per share, with the individual trades for that block executed between $119.00 and $119.31. The filing lists Walmart trading at $115.70 with a market capitalization of $926 billion.
Context and considerations
The reported activity spans a range of motivations and execution methods disclosed in filings: purchases by directors and officers, acquisitions through an entity controlled by an insider, option exercises followed by sales, block sales by an affiliated investor, and transactions carried out under pre-arranged trading plans. The filings provide details on per-share prices, weighted averages where applicable, and the trading windows for each set of transactions. For some issuers, the disclosures include InvestingPro commentary on valuation or recent analyst revisions; for others the filings focus on the mechanics of the trades and post-transaction holdings.
Why these filings matter
- Insider purchases are often cited as a signal that company insiders are allocating personal capital to their equity, though the filings here record varying structures of ownership and control, including indirect ownership and purchases made through entities.
- Large insider sales can result from option exercises, portfolio rebalancing or planned dispositions under 10b5-1 and similar arrangements; filings document both the exercise economics and the timing or pre-approval mechanisms when applicable.
- The filings give investors data points on price levels at which insiders traded and the scale of positions added or reduced, which investors may incorporate alongside other fundamental and market information.
Concluding notes
The week’s SEC disclosures present a mixed picture of insider behavior: multiple directors and an officer made sizeable purchases in smaller-cap and mid-cap names, while executive and affiliate selling included option-driven dispositions and large block sales. These filings cover the period May 27-29, 2026, and include both multi-day purchase programs and single-day sales carried out pursuant to pre-existing trading plans. While some entries in the filings are accompanied by InvestingPro valuation commentary, the documents themselves are factual records of the transactions and limited to the specifics reported to the SEC.
Investors should treat insider activity as one factor among many when evaluating companies. Filings reveal execution details and legal structures of trades, but not an insider’s full rationale. As the disclosures themselves state, insiders sell for varied reasons, including personal financial planning and diversification, and purchases can reflect different motivations tied to ownership structure, entity-managed acquisitions and voting rights retained by insiders.
Additional information
This article compiles the SEC Form 4 disclosures cited above and the accompanying valuation notes and trading metrics provided in the same filings for the companies listed.