PDF Solutions Inc (PDFS)
Who owns PDF Solutions Inc (PDFS)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 77.8% of the shares are freely tradable; institutional investors hold 83.9%.
Ownership Structure
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 11.62 | 4,866,177 | -0.4 | 03/31/2026 |
| Vanguard Group Inc | 7.38 | 3,089,519 | -2.1 | 12/31/2025 |
| Needham Investment Management, LLC | 4.83 | 2,022,700 | +2.9 | 03/31/2026 |
| Vanguard Portfolio Management, LLC | 3.35 | 1,400,722 | +0.0 | 03/31/2026 |
| Vanguard Capital Management, LLC | 3.32 | 1,388,122 | +0.0 | 03/31/2026 |
| Ranger Investment Management LP | 3.06 | 1,279,630 | +9.4 | 03/31/2026 |
| William Blair Investment Management, LLC | 3.00 | 1,255,559 | -7.6 | 03/31/2026 |
| State Street Corp | 2.85 | 1,192,408 | +3.5 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| iShares Core S&P Small-Cap ETF | 5.30 | 2,217,292 | +0.0 | 05/29/2026 |
| Needham Aggressive Growth Retail | 3.79 | 1,587,500 | +8.4 | 03/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Data as of: July 31, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.