Pdf Solutions's three largest insider shareholders as of September 29, 2026 are John Kachig Kibarian (President And Ceo, 2.52Mn shares), Kimon Michaels (Evp Of Products And Solutions, 1.54Mn shares), Andrzej Strojwas (Chief Technology Officer, 90.97K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | John Kachig Kibarian | President And Ceo | 0 | 2,522,756 | 2,522,756 | 56.8% | 25 Feb, 2025 |
| 2 | Kimon Michaels | Evp Of Products And Solutions | 0 | 1,542,072 | 1,542,072 | 34.7% | 11 Dec, 2025 |
| 3 | Andrzej Strojwas | Chief Technology Officer | 90,965 | 0 | 90,965 | 2.0% | 01 Sep, 2026 |
| 4 | Adnan Raza | Evp, Finance And Cfo | 80,697 | 0 | 80,697 | 1.8% | 02 Jul, 2026 |
| 5 | Joseph R Bronson | Director | 40,956 | 0 | 40,956 | 0.9% | 02 Jul, 2026 |
| 6 | Michael B Gustafson | Director | 40,192 | 0 | 40,192 | 0.9% | 02 Jul, 2026 |
| 7 | Marco Iansiti | Director | 39,465 | 0 | 39,465 | 0.9% | 05 Jul, 2022 |
| 8 | Ye Jane Li | Director | 26,632 | 0 | 26,632 | 0.6% | 02 Jul, 2026 |
| 9 | Chi-Foon Chan | Director | 24,168 | 0 | 24,168 | 0.5% | 02 Jul, 2026 |
| 10 | Shuo Zhang | Director | 23,380 | 0 | 23,380 | 0.5% | 12 Aug, 2026 |
| 11 | Nancy Erba | Director | 11,943 | 0 | 11,943 | 0.3% | 02 Jul, 2026 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 31 Aug, 2026 | Andrzej Strojwas | Chief Technology Officer | Disposed S | 3,394 | $44.41 | $150.73K | 90,965 | Direct |
| 12 Aug, 2026 | Shuo Zhang | Director | Disposed S | 1,501 | $51.47 | $77.26K | 23,380 | Direct |
| 01 Jul, 2026 | Shuo Zhang | Director | Acquired A | 2,689 | — | — | 24,881 | Direct |
| 01 Jul, 2026 | Michael B Gustafson | Director | Acquired A | 2,689 | — | — | 40,192 | Direct |
| 01 Jul, 2026 | Ye Jane Li | Director | Acquired A | 2,689 | — | — | 26,632 | Direct |
| 01 Jul, 2026 | Nancy Erba | Director | Acquired A | 2,689 | — | — | 11,943 | Direct |
| 01 Jul, 2026 | Andrzej Strojwas | Chief Technology Officer | Disposed F | 1,356 | $66.88 | $90.69K | 88,843 | Direct |
| 01 Jul, 2026 | Joseph R Bronson | Director | Acquired A | 2,689 | — | — | 40,956 | Direct |
| 01 Jul, 2026 | Adnan Raza | Evp, Finance And Cfo | Disposed F | 6,010 | $66.88 | $401.95K | 65,000 | Direct |
| 01 Jul, 2026 | Chi-Foon Chan | Director | Acquired A | 2,689 | — | — | 24,168 | Direct |
| 01 Jul, 2026 | Andrzej Strojwas | Chief Technology Officer | Acquired A | 5,360 | — | — | 94,203 | Direct |
| 01 Jul, 2026 | Adnan Raza | Evp, Finance And Cfo | Acquired A | 23,450 | — | — | 80,697 | Direct |
| 01 Jan, 2026 | Adnan Raza | Evp, Finance And Cfo | Disposed F | 5,498 | $28.53 | $156.86K | 71,010 | Direct |
| 01 Jan, 2026 | Andrzej Strojwas | Chief Technology Officer | Disposed F | 2,762 | $28.53 | $78.80K | 89,204 | Direct |
| 09 Dec, 2025 | Kimon Michaels | Evp Of Products And Solutions | Disposed G | 5,070 | $0.00 | $0 | 1,542,072 | Indirect |
| 01 Aug, 2025 | Adnan Raza | Evp, Finance And Cfo | Acquired A | 35,000 | — | — | 76,508 | Direct |
| 01 Aug, 2025 | Andrzej Strojwas | Chief Technology Officer | Acquired A | 8,000 | — | — | 91,966 | Direct |
| 01 Jul, 2025 | Kimon Michaels | Evp Of Products And Solutions | Disposed F | 798 | $21.87 | $17.45K | 28,298 | Indirect |
| 01 Jul, 2025 | Adnan Raza | Evp, Finance And Cfo | Disposed F | 4,921 | $21.87 | $107.62K | 63,880 | Direct |
| 01 Jul, 2025 | Andrzej Strojwas | Chief Technology Officer | Disposed F | 2,497 | $21.87 | $54.61K | 83,613 | Direct |