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.
Estimated from filings — the split-adjusted price range over the quarters each manager built the position. A range, not a fill price; 13F reports a quarter-end snapshot, not a trade date.