Perimeter Solutions, Inc. (NASDAQ: PRM) reported a series of insider sales this week when director William N. Thorndike Jr. disposed of 325,000 shares of the company’s common stock over a three-day span, according to a Form 4 filed with the Securities and Exchange Commission.
The transactions were executed between March 4 and March 6, 2026, and together produced total proceeds of $7,801,500. The first tranche, on March 4, consisted of 125,000 shares sold at a weighted average price of $24.26, yielding $3,032,500. The price range for that day’s sales was $23.85 to $24.53.
On March 5, Thorndike sold 100,000 shares at an average price of $24.06 for aggregate proceeds of $2,406,000. The recorded price spread for those shares was $23.66 to $24.40. The final set of sales took place on March 6, when 100,000 shares were sold at a weighted average of $23.63, generating $2,363,000. Those shares traded within a $23.37 to $23.99 range.
After completing the three transactions, Thorndike is recorded as directly owning 8,860,656 shares of Perimeter Solutions. The timing of the sales follows a period of notable appreciation for the stock - a 151% return over the past year, as reported by InvestingPro.
At the time of the filing, the market price for PRM was quoted at $23.53, which is close to the director’s weighted average sale prices across the three days. InvestingPro commentary included with the data highlights the stock’s elevated volatility, citing a beta of 1.98, and flags the shares as overvalued at current levels according to the platform’s analysis. The platform also references additional research material available for subscribers, including seven further ProTips and a Pro Research Report.
In separate company disclosures, Perimeter Solutions released fourth-quarter 2025 results that showed an adjusted earnings per share of $0.13, ahead of an expected loss of $0.08. The positive earnings surprise was reported alongside a decline in the company’s stock in pre-market trading, indicating a mixed market response to the quarterly figures.
These filings and earnings disclosures provide concrete data points for investors monitoring insider activity, recent performance metrics, and market reaction. The Form 4 details, the company’s quarterly result, and the InvestingPro assessments together paint a picture of active trading, a recent strong share-price run, and divergent signals from earnings and market behavior.