PDF SOLUTIONS INC - PDFS
Ownership (Schedule 13D / 13G) · latest 50 filings
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| Filed | Form | Reporting person | Percent | Shares | SEC |
|---|---|---|---|---|---|
| Mar 27, 2026 | SCHEDULE 13G/A | The Vanguard Group | 0.0% | 0 | View |
| Feb 17, 2026 | SCHEDULE 13G/A | KIBARIAN JOHN KACHIG | 6.5% | 2,562,474 | View |
| Feb 13, 2026 | SCHEDULE 13G/A | NEEDHAM INVESTMENT MANAGEMENT L.L.C. | 4.9% | 1,965,000 | View |
| Feb 13, 2026 | SCHEDULE 13G/A | NEEDHAM ASSET MANAGEMENT, LLC | 4.9% | 1,965,000 | View |
| Feb 13, 2026 | SCHEDULE 13G/A | NEEDHAM AGGRESSIVE GROWTH FUND | 3.7% | 1,465,000 | View |
| Feb 13, 2026 | SCHEDULE 13G/A | NEEDHAM GROWTH FUND | 0.7% | 270,000 | View |
| Feb 13, 2026 | SCHEDULE 13G/A | NEEDHAM SMALL CAP GROWTH FUND | 0.6% | 230,000 | View |
| Feb 13, 2026 | SCHEDULE 13G/A | GEORGE A. NEEDHAM | 4.9% | 1,965,000 | View |
| Nov 13, 2025 | SCHEDULE 13G | NEEDHAM INVESTMENT MANAGEMENT L.L.C. | 5.1% | 2,018,550 | View |
| Nov 13, 2025 | SCHEDULE 13G | NEEDHAM ASSET MANAGEMENT, LLC | 5.1% | 2,018,550 | View |
| Nov 13, 2025 | SCHEDULE 13G | NEEDHAM AGGRESSIVE GROWTH FUND | 3.5% | 1,385,000 | View |
| Nov 13, 2025 | SCHEDULE 13G | NEEDHAM GROWTH FUND | 0.7% | 293,550 | View |
| Nov 13, 2025 | SCHEDULE 13G | NEEDHAM SMALL CAP GROWTH FUND | 0.9% | 340,000 | View |
| Nov 13, 2025 | SCHEDULE 13G | GEORGE A. NEEDHAM | 5.1% | 2,018,550 | View |
Percent = "% of class represented by amount beneficially owned" for this reporting person in the filed 13D/13G.
Shares = reported beneficial ownership amount for the same row (not portfolio shares from 13F).
Amendments (/A) can repeat the same holder over time, so rows should not be summed.
Extraction is best-effort from filing text and can be missing or noisy; verify exact figures via the SEC link in each row.