Insider report: The stocks with the biggest recent sales by executives from Circle Internet, Zillow, Applovin and more

Last week saw significant insider selling across numerous firms, including Circle Internet Group ($45.5M by CEO), Zillow Group ($51.1M by co-chairmen outside 10b5-1 plans), and Cardinal Health (executives selling post-vesting stock near highs). These discretionary sales, often following substantial share price gains or near peak valuations, are closely scrutinized by investors as potential signals of executive sentiment or future company performance, notwithstanding diverse individual motivations.

Analysis

A notable pattern of discretionary insider selling emerged last week across multiple sectors, with executives at several high-flying companies offloading significant stock holdings outside of pre-scheduled 10b5-1 plans. At Zillow Group, co-chairmen Richard Barton and Lloyd Frink executed combined sales of $51.1 million, with Barton's sale marking his first non-planned transaction since 2017, coinciding with a 25% quarter-to-date share price increase. Similarly, at Monolithic Power Systems, CEO Michael Hsing's $16.8 million sale was his first non-planned disposition since 2019, occurring after he terminated a trading plan. A particularly strong negative signal comes from Cardinal Health, where eight executives sold shares post-vesting near all-time highs; the activity was described as accelerating annually, with several executives selling more shares than had recently vested, a cautious indicator. At Willdan Group, multi-insider selling was led by the former CEO after the stock's 126% surge over three months, a move that is significant given his history of timely sales near peaks. Other large sales at firms like Applovin, Informatica, and Robinhood followed substantial recent gains, reinforcing a theme of insiders capitalizing on strong market performance. The $45.5 million sale by Circle's CEO, while large, is contextualized by its occurrence as part of a secondary offering for the recently-listed, volatile stock.

Key Decisions for Investors

• Given the concentration of discretionary insider sales following significant stock appreciation, investors should heighten scrutiny on valuation and consider trimming positions in names that have seen rapid run-ups, such as WLDN and HOOD.
• The unusual nature of the sales at Zillow (first non-plan sale in years) and Cardinal Health (accelerated selling beyond vested shares) warrants a review of bullish theses, as these actions may signal an executive view that the stocks are fully valued.
• Investors should monitor for any further non-planned insider sales at these companies, as continued selling could reinforce the bearish signal and precede a potential correction in share prices.
• Differentiate the context of the sales; the Circle transaction, linked to a post-IPO secondary offering, may carry different implications than the opportunistic, non-plan-based sales observed at Zillow and Monolithic Power Systems.