FormFactor Inc's chief executive, Mike Slessor, executed a sale of 10,227 shares of the company's common stock on March 18, 2026, according to a Form 4 filing with the Securities and Exchange Commission. The trades were carried out under a Rule 10b5-1 trading plan and generated proceeds of $973,076.
The disposition was completed in three separate transactions. The first tranche comprised 1,900 shares sold at a weighted average price of $94.10, with individual sale prices in that lot ranging from $93.63 to $94.48. The second and largest tranche consisted of 5,495 shares at a weighted average price of $95.21, with executions from $94.77 to $95.60. The final block involved 2,832 shares at a weighted average price of $95.73, trading between $95.66 and $95.87.
Following these sales, Slessor is listed as the direct owner of 460,859 shares of FormFactor, which at the current quoted price of $96.18 amounts to an approximate holding value of $44 million.
The Form 4 filing notes that the sales were made pursuant to a Rule 10b5-1 plan that Slessor adopted on August 19, 2025. The filing does not indicate any deviations from that plan.
Market context and valuation notes
FormFactor's stock is trading at $96.18, representing a 193% gain over the past 12 months. An analysis from InvestingPro included in public commentary indicates the equity appears overvalued relative to its Fair Value, even as seven analysts have recently revised earnings estimates higher. The InvestingPro commentary is presented as an assessment and is separate from the insider filing information.
Recent financial results
In a related development, FormFactor reported fourth-quarter 2025 results that exceeded Wall Street expectations. The company posted earnings per share of $0.46, above the consensus estimate of $0.35, a surprise of 31.43 percent. Revenue for the quarter came in at $215.2 million versus an anticipated $210.25 million.
Despite the upside to both EPS and revenue, the stock declined in regular trading on the earnings release and showed a modest recovery in after-hours trading.
What this means
The Form 4 filing documents a programmed sale by the CEO under an existing 10b5-1 plan, while public data points show the company delivered quarterly results above consensus. The filing supplies precise execution prices and volumes for the three tranches sold on March 18, 2026, and the earnings release supplies the specific EPS and revenue beats and the market's immediate intraday response.
Where available, the filing and the earnings release provide concrete metrics for investors and market participants to consider when assessing insider activity alongside recent financial performance.