SEC Form 4 · Updated Daily
PDFS
— PDF SOLUTIONS, INC. OwnershipInsider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.
Current Reporting Owners
| Owner | Role | Shares Owned | As Of | Last Activity |
|---|---|---|---|---|
| KIBARIAN JOHN KACHIG | Director · Officer | 2,522,756 | 2025-02-25 | P |
| MICHAELS KIMON | Director · Officer | 1,542,072 | 2025-12-09 | G |
| LANZA LUCIO | Director | 318,967 | 2017-08-18 | S |
| JOSEPH DAVID | Officer | 264,174 | 2010-05-15 | F |
| MELMAN P STEVEN | Officer | 156,878 | 2009-05-15 | F |
| Strojwas Andrzej | Officer | 90,965 | 2026-08-31 | S |
| Raza Adnan | Officer | 80,697 | 2026-07-01 | A |
| CHRISTINE RUSSELL | Director | 69,225 | 2020-02-01 | F |
| Jones Keith A | Officer | 64,134 | 2010-03-15 | F |
| JENSEN JAMES D | Officer | 51,219 | 2009-08-27 | P |
| HARTGRING CORNELIS | Officer | 46,082 | 2018-06-01 | F |
| BRONSON JOSEPH R | Director | 40,956 | 2026-07-01 | A |
| GUSTAFSON MICHAEL B | Director | 40,192 | 2026-07-01 | A |
| Iansiti Marco | Director | 39,465 | 2022-07-01 | A |
| Caulfield Thomas | Director | 30,714 | 2013-09-11 | G |
| HEINRICHS R STEPHEN | Director | 29,968 | 2016-07-01 | A |
| Li Ye Jane | Director | 26,632 | 2026-07-01 | A |
| CHAN CHI-FOON | Director | 24,168 | 2026-07-01 | A |
| Zhang Shuo | Director | 23,380 | 2026-08-12 | S |
| WALKER GREGORY C | Officer | 21,468 | 2018-07-01 | F |
| Yu Albert YC | Director | 16,414 | 2014-02-20 | M |
| Erba Nancy | Director | 11,943 | 2026-07-01 | A |
| Yin Gerald Zheyao | Director | 11,023 | 2020-11-20 | S |
| SHAHBAZIAN MICHAEL | Officer | 10,966 | 2012-04-15 | F |
| MALIK ZIA | Officer | 10,000 | 2006-11-10 | M |
| MacLean Kevin | Officer | 8,374 | 2006-11-07 | M |
| HAWIT ANDRE | Officer | 7,000 | 2008-11-26 | S |
| Kim KwangH | Officer | 4,463 | 2017-06-01 | A |
| BAYBROOK REBECCA M | Officer | 4,388 | 2006-11-30 | M |
| LEO JOY E | Officer | 0 | 2008-07-14 | — |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2026-09-01 | MICHAELS KIMON | Grant / award (derivative) | 71,000 | $0.00 | 71,000 |
| 2026-09-01 | Strojwas Andrzej | Grant / award (derivative) | 20,000 | $0.00 | 20,000 |
| 2026-09-01 | KIBARIAN JOHN KACHIG | Grant / award (derivative) | 71,000 | $0.00 | 71,000 |
| 2026-09-01 | Raza Adnan | Grant / award (derivative) | 70,000 | $0.00 | 70,000 |
| 2026-08-31 | Strojwas Andrzej | Open-market sale | 3,394 | $44.41 | 90,965 |
| 2026-08-12 | Zhang Shuo | Open-market sale | 1,501 | $51.47 | 23,380 |
| 2026-07-01 | Raza Adnan | Grant / award | 23,450 | — | 80,697 |
| 2026-07-01 | Raza Adnan | Tax withholding | 6,010 | $66.88 | 65,000 |
| 2026-07-01 | Erba Nancy | Grant / award | 2,689 | — | 11,943 |
| 2026-07-01 | Li Ye Jane | Grant / award | 2,689 | — | 26,632 |
| 2026-07-01 | BRONSON JOSEPH R | Grant / award | 2,689 | — | 40,956 |
| 2026-07-01 | CHAN CHI-FOON | Grant / award | 2,689 | — | 24,168 |
| 2026-07-01 | GUSTAFSON MICHAEL B | Grant / award | 2,689 | — | 40,192 |
| 2026-07-01 | Zhang Shuo | Grant / award | 2,689 | — | 24,881 |
| 2026-07-01 | Strojwas Andrzej | Grant / award | 5,360 | — | 94,203 |
| 2026-07-01 | Strojwas Andrzej | Tax withholding | 1,356 | $66.88 | 88,843 |
| 2026-01-01 | Raza Adnan | Tax withholding | 5,498 | $28.53 | 71,010 |
| 2026-01-01 | Strojwas Andrzej | Tax withholding | 2,762 | $28.53 | 89,204 |
| 2025-12-09 | MICHAELS KIMON | Gift | 5,070 | $0.00 | 1,542,072 |
| 2025-08-01 | Strojwas Andrzej | Grant / award | 8,000 | — | 91,966 |
| 2025-08-01 | Raza Adnan | Grant / award | 35,000 | — | 76,508 |
| 2025-07-01 | Zhang Shuo | Grant / award | 7,429 | — | 22,192 |
| 2025-07-01 | Li Ye Jane | Grant / award | 7,429 | — | 23,943 |
| 2025-07-01 | GUSTAFSON MICHAEL B | Grant / award | 7,429 | — | 37,503 |
| 2025-07-01 | Erba Nancy | Grant / award | 7,429 | — | 27,383 |
| 2025-07-01 | CHAN CHI-FOON | Grant / award | 7,429 | — | 21,479 |
| 2025-07-01 | BRONSON JOSEPH R | Grant / award | 7,429 | — | 38,267 |
| 2025-07-01 | Strojwas Andrzej | Tax withholding | 2,497 | $21.87 | 83,613 |
| 2025-07-01 | Raza Adnan | Tax withholding | 4,921 | $21.87 | 63,880 |
| 2025-07-01 | MICHAELS KIMON | Tax withholding | 798 | $21.87 | 28,298 |
| 2025-05-13 | GUSTAFSON MICHAEL B | Open-market buy | 7,500 | $19.45 | 30,074 |
| 2025-02-25 | KIBARIAN JOHN KACHIG | Open-market buy | 15,644 | $22.11 | 2,522,756 |
| 2025-02-24 | KIBARIAN JOHN KACHIG | Open-market buy | 34,356 | $22.80 | 2,507,112 |
| 2025-02-24 | GUSTAFSON MICHAEL B | Open-market buy | 4,000 | $23.06 | 22,574 |
| 2025-01-01 | Strojwas Andrzej | Tax withholding | 2,833 | — | 85,631 |
| 2025-01-01 | Raza Adnan | Tax withholding | 5,258 | — | 68,013 |
| 2025-01-01 | MICHAELS KIMON | Tax withholding | 870 | — | 33,394 |
| 2024-12-17 | Strojwas Andrzej | Open-market sale | 6,008 | $30.36 | 88,464 |
| 2024-12-17 | Strojwas Andrzej | Open-market sale | 245 | $31.17 | 94,472 |
| 2024-12-16 | Strojwas Andrzej | Open-market sale | 5,030 | $30.85 | 94,717 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.