PDF Solutions
Connects, analyzes, and inspects semiconductor manufacturing data to improve yield and process control.
$44.81
After-hours close−0.08 (−0.18%)
At close$44.89(−2.73%)
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Breakdown13F · Form 4
Institutions 99.92%Insiders 4.48%
Institutions and insiders are filed separately and overlap, so together they can pass the whole company. No split is drawn from them.
Shares outstanding 41.87M · Float 32.53M · 77.7% free float
Institutions13F, as of Jun 30, 2026
290 holders · 41.83M shares · 101 new positions · 193 increased · 63 reduced · 25 closed
| Holder | Shares | % outstanding | Chg q/q | Filed |
|---|---|---|---|---|
| BlackRock, Inc. | 5.55M | 13.26% | +684.2K | Aug 7, 2026 |
| Needham Investment Management LLC | 2.07M | 4.93% | +42.3K | Aug 14, 2026 |
| Vanguard Capital Management LLC | 1.66M | 3.98% | +276.1K | Aug 13, 2026 |
| Vanguard Portfolio Management LLC | 1.46M | 3.48% | +57.0K | Aug 13, 2026 |
| State Street Corp | 1.39M | 3.31% | +194.1K | Aug 7, 2026 |
| Wasatch Advisors LP | 1.38M | 3.30% | +873.0K | Jul 10, 2026 |
| Barrow Hanley Mewhinney & Strauss LLC | 1.32M | 3.15% | +179.1K | Aug 12, 2026 |
| Ranger Investment Management, L.P. | 1.15M | 2.75% | −130.0K | Aug 13, 2026 |
Beneficial owners13D/G · 5% or more, as filed
| Holder | % of class | Shares | Form | Filed |
|---|---|---|---|---|
| Kibarian John Kachig | 6.50% | 2.56M | 13G | Feb 17, 2026 ↗ |
| John Kachig Kibarian | 6.50% | 2.51M | 13G | Feb 12, 2025 ↗ |
| Needham Investment Management L.L.C. | 5.10% | 2.02M | 13G | May 14, 2026 ↗ |
InsidersForm 4
| Insider | Role | Shares | % outstanding | Filed |
|---|---|---|---|---|
| Kimon Michaels | director, officer: EVP of Products and Solutions | 1.54M | 3.68% | Dec 11, 2025 |
| Andrzej Strojwas | officer: Chief Technology Officer | 88.8K | 0.21% | Jul 2, 2026 |
| Adnan Raza | officer: EVP, Finance and CFO | 65.0K | 0.16% | Jul 2, 2026 |
| Joseph R. Bronson | director | 41.0K | 0.10% | Jul 2, 2026 |
| Michael B. Gustafson | director | 40.2K | 0.10% | Jul 2, 2026 |
| Ye Jane Li | director | 26.6K | 0.06% | Jul 2, 2026 |
| Nancy Erba | director | 25.7K | 0.06% | Jul 2, 2026 |
| Chi-Foon Chan | director | 24.2K | 0.06% | Jul 2, 2026 |
| Shuo Zhang | director | 23.4K | 0.06% | Aug 12, 2026 |
21 people have not refiled in the last 18 months (4.54M shares), so they are not in the figure above
Latest trades
| Date | Insider | Type | Shares | Avg price | Owned after |
|---|---|---|---|---|---|
| Aug 12, 2026 | Shuo Zhangdirector | Sale | 1,501 | $51.47 | 23,380 |
CongressHouse and Senate disclosures
Not reported.