Photronics, Inc.
A maker of photomasks—the precision quartz "blueprints" used to print the microscopic circuits inside the chips and flat-panel displays that power smartphones, computers, and TVs. Founded in 1969 by Deno Macricostas, who started the company in a Connecticut garage after designing early photomask equipment for a prior employer. Today it runs fabrication plants across North America, Europe, and Asia.
| Holder | Schedule | % of class | Shares | Filed |
|---|---|---|---|---|
| American Century Investment Management, Inc. | 13GPassive | 5.7% | 3.39M | Aug 14, 2026 |
| American Century Companies, Inc. | 13GPassive | 5.7% | 3.39M | Aug 14, 2026 |
| Stowers Institute for Medical Research | 13GPassive | 5.7% | 3.39M | Aug 14, 2026 |
| American Century ETF Trust | 13GPassive | 5.5% | 3.25M | Aug 14, 2026 |
| Vanguard Portfolio Management | 13GPassive | 5.1% | 3.01M | Jul 31, 2026 |
| Dimensional Fund Advisors LP | 13G/APassive | 6.2% | 3.64M | Jul 14, 2026 |
| The Vanguard Group | 13G/APassive | 0% | 0 | Mar 26, 2026 |
| BlackRock, Inc. | 13G/APassive | 15% | 9.55M | Apr 29, 2025 |