PDF Solutions Inc. (NASDAQ: PDFS), a semiconductor process control and data analytics company, disclosed on July 2, 2026, that Chief Technology Officer Andrzej Strojwas was granted 5,360 restricted stock units and simultaneously disposed of 1,356 shares to cover tax withholding obligations tied to a separate RSU vesting event. The dual transactions, both executed on July 1, 2026, leave Strojwas with a total direct beneficial ownership of 94,203 shares of PDFS common stock. Investors tracking insider ownership levels and executive compensation structures at the Santa Clara-based firm may view the new RSU grant as a signal of continued alignment between senior leadership and long-term company performance.

Key Points

  • CTO Andrzej Strojwas received a new award of 5,360 restricted stock units on July 1, 2026
  • 1,356 shares were disposed of at $66.88 per share solely to satisfy tax withholding obligations on a separate RSU vesting — not an open-market sale
  • Total direct beneficial ownership following both transactions stands at 94,203 shares
  • The new RSUs vest in 12.5% increments every six months from the vesting start date, subject to continued service
  • Investors should watch for further RSU vesting events and any open-market transactions by PDFS insiders over the coming quarters

Details of the July 1, 2026 RSU Award to PDF Solutions' Chief Technology Officer

The Form 4 filed with the Securities and Exchange Commission on July 2, 2026, confirms that Andrzej Strojwas, Chief Technology Officer of PDF Solutions Inc., received an award of 5,360 restricted stock units on July 1, 2026. The filing classifies this transaction under the standard acquisition code, indicating these are newly granted units rather than units acquired through open-market activity. The RSU award is reported as a direct ownership interest, consistent with typical executive compensation grants at technology companies listed on NASDAQ.

According to the filing, the RSU vesting schedule is structured on a semi-annual basis. Specifically, 12.5% of the total RSUs granted are scheduled to vest on the date that is six months after the vesting start date, with an additional 12.5% vesting every six months thereafter until the award is fully vested. The filing states that vesting is subject to the recipient's continued service through each applicable vesting date, a standard provision designed to incentivize executive retention and sustained contribution to company goals.

Tax Withholding Disposition: Why 1,356 Shares Were Surrendered at $66.88

Alongside the RSU grant, the filing discloses a separate disposition of 1,356 shares of PDF Solutions common stock on the same date, July 1, 2026, at a price of $66.88 per share. The filing is explicit that this was not an open-market sale. Instead, these shares were surrendered directly to PDF Solutions to satisfy tax withholding obligations arising from the vesting of a separate tranche of restricted stock units. This mechanism — commonly referred to as a "sell-to-cover" or "withhold-to-cover" arrangement — is a routine feature of RSU compensation plans and does not reflect a discretionary decision by the executive to reduce his stake in the company.

Investors and analysts familiar with insider transaction filings will recognize that such tax-related dispositions carry a fundamentally different implication than voluntary open-market sales. The filing's explanatory footnote makes this distinction clear, noting that the transaction code used is "F," which the SEC specifically designates for payment of exercise price or tax liability by delivering or withholding securities. As a result, the reduction of 1,356 shares should not be interpreted as a bearish signal regarding Strojwas's conviction in PDF Solutions' outlook.

Strojwas's Total Beneficial Ownership Position After Both Transactions

Following both the RSU grant and the tax withholding disposition, Strojwas holds 94,203 shares of PDF Solutions common stock in a direct ownership capacity, as reported in Table I of the Form 4. Prior to the RSU grant, and after accounting for the tax withholding disposal, his share count stood at 88,843 shares — a figure the filing notes includes 995 shares of common stock purchased on January 31, 2026, under the PDF Solutions Employee Stock Purchase Plan (ESPP). The addition of the 5,360 newly granted RSUs, which convert to shares upon vesting, brings the post-transaction total to 94,203 shares.

The inclusion of ESPP-purchased shares in the beneficial ownership count is a notable detail. It indicates that Strojwas has been an active participant in the company's employee stock purchase program, further reinforcing the alignment of his personal financial interests with those of PDF Solutions shareholders. The ESPP purchase, disclosed as occurring on January 31, 2026, is a separate program from the RSU compensation plan and typically allows eligible employees to purchase company shares at a discount to the prevailing market price.

PDF Solutions' Executive Compensation Philosophy and RSU Grant Structure

The vesting schedule disclosed for the new RSU award — 12.5% every six months over a total period of four years — is consistent with an eight-installment vesting structure. This approach is commonly used by technology sector companies to balance near-term retention incentives with longer-duration performance alignment. By spreading equity vesting across multiple semi-annual milestones, PDF Solutions' compensation framework encourages key executives like Strojwas to remain with the company throughout the full vesting cycle.

The filing also reveals that the transaction was signed by Adnan Raza, identified as Attorney-in-Fact for Andrzej Strojwas, on July 2, 2026. The use of a power of attorney for Form 4 filings is a legally permissible and not uncommon practice among corporate officers, particularly at companies with structured compliance programs. This does not alter the legal responsibilities of the reporting person under Section 16(a) of the Securities Exchange Act of 1934, pursuant to which the filing was made.

Section 16(a) Reporting Obligations and What This Filing Represents for PDFS Compliance

The Form 4 was filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, which requires officers, directors, and beneficial owners of more than ten percent of a company's registered equity securities to report changes in their beneficial ownership. As CTO of PDF Solutions, Strojwas qualifies as a reporting person under this provision. The filing was submitted on July 2, 2026, the day following the transactions dated July 1, 2026, indicating timely compliance with SEC reporting requirements, which generally mandate submission within two business days of a reportable transaction.

No amendments or corrections to a prior Form 4 were indicated in this filing — the document reflects an original, standalone disclosure rather than a revision. The SEC's Form 4 mechanism plays an important role in market transparency, providing retail and institutional investors alike with visibility into the equity transactions of key corporate insiders. For a company like PDF Solutions, which operates in the technically complex and capital-intensive semiconductor analytics space, tracking executive ownership changes can offer one lens through which to evaluate leadership confidence in the business.

PDF Solutions Inc.: Company Background and the Role of the Chief Technology Officer

PDF Solutions Inc., headquartered in Santa Clara, California, provides software and intellectual property solutions designed to improve the yield, performance, and reliability of integrated circuits for semiconductor manufacturers. The company's platform leverages data analytics and process control technologies deployed at various stages of chip manufacturing. As CTO, Andrzej Strojwas holds one of the most strategically significant roles at the firm, overseeing the technical direction of products and solutions that sit at the core of PDF Solutions' commercial offering.

The CTO's address listed in the filing — 2858 De La Cruz Blvd., Santa Clara, CA 95050 — corresponds to PDF Solutions' corporate headquarters. This detail, standard in Form 4 filings, underscores that Strojwas is based at the company's principal office. For investors evaluating PDFS, the continued granting of RSUs to the CTO may be viewed as consistent with the company's strategy of retaining key technical talent in a competitive semiconductor industry labor market.

How the $66.88 Share Price Contextualizes the Tax Withholding Transaction

The price of $66.88 per share used for the tax withholding disposition on July 1, 2026, provides a reference point for investors seeking to understand the valuation context of this insider activity. The filing states this figure explicitly in connection with the 1,356 shares surrendered to the company. It is important to note that this price was used solely to calculate the value of shares withheld for tax purposes — it was not the result of a market transaction initiated by Strojwas, and therefore may not precisely reflect the open-market trading price at that exact moment.

The immediate share price impact of these disclosures was not clear from available public information. Investors who monitor PDFS shares may wish to compare the $66.88 reference price against prevailing market levels to gauge where the stock is trading relative to the valuation implied by the tax withholding mechanism. Form 4 filings of this nature — involving routine RSU grants and associated tax dispositions — do not typically generate significant short-term price movements, though they contribute to the broader picture of insider activity that some market participants track as a sentiment indicator.

Implications of the Semi-Annual RSU Vesting Schedule for Future Insider Activity Filings

Given the 12.5% semi-annual vesting schedule disclosed in the filing, investors and compliance watchers can anticipate a series of future Form 4 filings from Strojwas as each installment of the 5,360-RSU award vests over the coming four years. Each vesting event will likely trigger a corresponding tax withholding disposition, similar to what was reported on July 1, 2026, unless Strojwas elects an alternative tax settlement method. These future filings will provide ongoing transparency into his beneficial ownership levels.

Additionally, the filing references an earlier RSU vesting event that prompted the July 1, 2026, tax withholding disposal — suggesting that Strojwas holds other RSU tranches from prior award cycles that continue to vest on their own schedules. Investors tracking the cumulative insider ownership trajectory at PDF Solutions may find it useful to monitor all Form 4 disclosures filed by the CTO and other Section 16 reporting persons as these existing awards vest incrementally throughout 2026 and beyond.

Broader Insider Activity Context for PDF Solutions Shareholders

While this particular Form 4 covers transactions by the Chief Technology Officer alone, investors in PDF Solutions may wish to review the full landscape of insider filings at the company to understand aggregate trends in executive equity activity. A pattern of consistent RSU grants across the senior leadership team, combined with the absence of discretionary open-market sales, is generally regarded by market observers as a neutral-to-positive indicator of insider sentiment. The filing from Strojwas reflects no open-market selling, only a routine tax-related disposition.

It is also worth noting that the Employee Stock Purchase Plan participation disclosed in this filing — with 995 ESPP shares purchased as recently as January 31, 2026 — adds a dimension of active, discretionary investment by the CTO in PDF Solutions stock beyond what is provided through direct RSU compensation. ESPP participation is voluntary and signals a personal financial commitment to the company's equity performance. Investors may view this combination of RSU accumulation and ESPP participation as consistent with an executive who retains meaningful personal exposure to PDF Solutions' long-term share price trajectory.