SCHEDULE: Needham Entities Report 5.1% Stake in PDF Solutions

Needham Investment Management and related entities have reported a 5.1% beneficial ownership stake in PDF Solutions, Inc. as of September 30, 2025.

Summary

• Needham Investment Management L.L.C., Needham Asset Management, LLC, and George A. Needham each beneficially own 2,018,550 shares of PDF Solutions, Inc. common stock, representing a 5.1% stake.
• Needham Aggressive Growth Fund holds 1,385,000 shares, accounting for 3.5% of the class.
• Needham Growth Fund holds 293,550 shares, representing 0.7% of the class.
• Needham Small Cap Growth Fund holds 340,000 shares, representing 0.9% of the class.
• The reported ownership is as of September 30, 2025, with the filing dated November 13, 2025.
• The securities were acquired and are held in the ordinary course of business, not for the purpose of changing or influencing control of PDF Solutions, Inc.

Sentiment

Score: 6

Explanation: While a Schedule 13G is primarily a factual disclosure of ownership, the establishment or maintenance of a significant stake (5.1%) by a recognized investment group like Needham can be viewed as a mild positive signal, indicating institutional confidence in PDF Solutions, Inc. The filing itself contains no negative operational or financial information.

Positives

• The disclosure of a 5.1% beneficial ownership by Needham Investment Management L.L.C. and related entities indicates significant institutional interest in PDF Solutions, Inc.
• The filing explicitly states that the securities were acquired and are held in the ordinary course of business and not for the purpose of changing or influencing control, which suggests a passive, long-term investment perspective.

Negatives

• No specific negative information regarding PDF Solutions, Inc.'s operations or financial performance is disclosed in this beneficial ownership report.

Risks

• This filing is a beneficial ownership report and does not contain disclosures regarding the operational or financial risks of PDF Solutions, Inc.

Future Outlook

This Schedule 13G filing does not provide any forward-looking statements or guidance for PDF Solutions, Inc.

Management Comments

• The securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities.

Industry Context

Needham's investment in PDF Solutions, a company providing data analytics and process control solutions for semiconductor manufacturing, aligns with the broader industry trend of increasing demand for advanced chip design and production optimization. This institutional interest may signal confidence in the long-term growth prospects of the semiconductor technology sector.

Comparison to Industry Standards

• This filing is a beneficial ownership report and does not contain performance data that can be compared to industry standards or specific comparable companies.

Stakeholder Impact

• Shareholders: Increased institutional ownership may provide stability and confidence in the company's long-term prospects.
• Management: Awareness of a significant institutional shareholder group may influence strategic decisions and communication.

Next Steps

• No specific future actions or milestones for PDF Solutions, Inc. are mentioned in this filing.

Key Dates

Recommendation

The filing indicates a significant institutional stake by Needham, suggesting a vote of confidence in PDF Solutions, Inc. However, as a Schedule 13G, it does not provide sufficient financial or operational details to warrant a strong buy or sell recommendation. Investors should consider this institutional interest as a data point but await further fundamental analysis of the company's performance and prospects before making definitive investment decisions. A 'hold' recommendation is appropriate given the limited scope of information in this specific filing.

Keywords

PDF Solutions, Needham Investment Management, Schedule 13G, beneficial ownership, institutional investor, stock ownership, semiconductor industry