Andrzej Strojwas, Chief Technology Officer of PDF Solutions Inc (NASDAQ:PDFS), filed a Form 4 on September 1, 2026, disclosing the sale of 3,394 shares of common stock on August 31, 2026.

Key Highlights

  • Shares sold: Andrzej Strojwas disposed of 3,394 shares of PDF Solutions common stock on August 31, 2026.
  • Average weighted sale price: $44.41 per share, with individual transaction prices ranging from $44.37 to $44.43, according to the filing.
  • Post-transaction ownership: Strojwas directly owned 90,965 shares following the reported transaction.
  • ESPP shares included: The post-transaction total includes 156 shares purchased on July 31, 2026 under the PDF Employee Stock Purchase Plan.
  • Transaction code: The sale was coded "S," indicating an open-market sale, per the filing.

Strojwas Share Sale Details and Beneficial Ownership at PDF Solutions

According to the Form 4 filed with the SEC on September 1, 2026, Andrzej Strojwas, who serves as Chief Technology Officer of PDF Solutions Inc, sold 3,394 shares of the company's common stock on August 31, 2026. The filing notes that the shares were sold in multiple broker transactions at various market prices per share ranging from $44.37 to $44.43, with an average weighted sale price of $44.41.

Following the reported transaction, Strojwas directly held 90,965 shares of PDF Solutions common stock, according to the filing. The filing discloses that this total includes 156 shares of common stock purchased on July 31, 2026 under the PDF Employee Stock Purchase Plan. The ownership is reported as direct. No derivative securities transactions were reported in this filing.

The Form 4 was signed by Adnan Raza as Attorney-in-Fact for Andrzej Strojwas and was filed on September 1, 2026. The filing does not indicate that the transaction was made pursuant to a Rule 10b5-1(c) trading plan, as the corresponding checkbox on the form was not checked.

What Was Disclosed

PDF Solutions CTO Andrzej Strojwas reported the sale of 3,394 shares of common stock at an average price of $44.41 on August 31, 2026, leaving him with direct ownership of 90,965 shares, per the Form 4 filed September 1, 2026.