PLAB · Insider Trading
Photronics Inc
Every open-market purchase and sale reported by PLAB officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-10-02 | Rui Zhang | VP, CAO & Corporate Controller | F | −392 | −$12.09K |
| 2026-10-02 | Eric Rivera | President, CFO | F | −2,897 | −$89.31K |
| 2026-10-01 | Kang Jyh Lee | Director | Sell | −10,000 | −$307.50K |
| 2026-09-29 | Han Kyung Park | SVP & GM of FPD Ops | Sell | −9,500 | −$288.51K |
| 2026-09-28 | Kang Jyh Lee | Director | Sell | −7,500 | −$221.25K |
| 2026-09-24 | Kang Jyh Lee | Director | Sell | −10,000 | −$297.00K |
| 2026-04-21 | Rui Zhang | VP, CAO & Corporate Controller | Sell | −4,556 | −$212.77K |
| 2026-04-21 | Mary Paladino | Director | D | −22,548 | −$1.08M |
| 2026-04-20 | Kang Jyh Lee | Director | Sell | −20,000 | −$918.50K |
| 2026-04-17 | Kang Jyh Lee | Director | Sell | −10,000 | −$451.00K |
| 2026-04-16 | Hsueh-Chun Wang | SVP/COO IC & US/EU Mnstrm Ops | Sell | −19,250 | −$872.02K |
| 2026-04-15 | Adam M Lewis | Director | A | +3,722 | — |
| 2026-04-15 | David A. Garcia | Director | A | +3,722 | — |
| 2026-04-15 | Kang Jyh Lee | Director | MIXED | — | −$182.00K |
| 2026-04-15 | Michelle Almeida | Director | A | +3,722 | — |
| 2026-04-15 | Mitchell G Tyson | Director | A | +3,722 | — |
| 2026-04-15 | Daniel JL Liao | Director | A | +3,722 | — |
| 2026-04-15 | Constantine S Macricostas | Director | A | +3,722 | — |
| 2026-04-15 | Eric Rivera | President, CFO | MIXED | — | −$34.99K |
| 2026-04-14 | Constantine S Macricostas | Director | G | −50,000 | — |
| 2026-04-14 | Constantine S Macricostas | Director | Sell | −50,000 | −$2.27M |
| 2026-04-13 | Eric Rivera | President, CFO | Sell | −41,517 | −$1.83M |
| 2026-04-13 | Hsueh-Chun Wang | SVP/COO IC & US/EU Mnstrm Ops | Sell | −11,875 | −$525.47K |
| 2026-04-13 | Kang Jyh Lee | Director | MIXED | — | −$177.00K |
| 2026-04-10 | Hsueh-Chun Wang | SVP/COO IC & US/EU Mnstrm Ops | Sell | −10,000 | −$426.90K |
| 2026-04-10 | George Macricostas | CEO | Sell | −121,194 | −$5.20M |
| 2026-04-10 | Kang Jyh Lee | Director | MIXED | — | −$173.35K |
| 2026-04-10 | Rui Zhang | VP, CAO & Corporate Controller | Sell | −1,752 | −$76.21K |
| 2026-04-08 | Kang Jyh Lee | Director | MIXED | — | −$159.65K |
| 2026-04-03 | Mitchell G Tyson | Director | Sell | −10,000 | −$423.10K |
| 2026-04-03 | Kang Jyh Lee | Director | MIXED | — | −$156.25K |
| 2026-04-03 | Hsueh-Chun Wang | SVP/COO IC & US/EU Mnstrm Ops | Sell | −10,000 | −$420.83K |
| 2026-03-30 | Kang Jyh Lee | Director | MIXED | — | −$150.25K |
| 2026-03-25 | Kang Jyh Lee | Director | Sell | −10,000 | −$390.00K |
| 2026-03-24 | Kang Jyh Lee | Director | Sell | −10,000 | −$358.00K |
| 2026-02-11 | Rui Zhang | VP, CAO & Corporate Controller | A | +1,467 | — |
| 2026-02-11 | Eric Rivera | President, CFO | A | +22,641 | — |
| 2026-02-11 | Todd Anthony Alesio | SVP, CAO | A | +983 | — |
| 2026-01-22 | Michelle Almeida | Director | A | +1,234 | — |
| 2026-01-22 | Daniel JL Liao | Director | A | +1,234 | — |
| 2026-01-20 | Kang Jyh Lee | Director | Sell | −10,000 | −$345.10K |
| 2026-01-20 | Han Kyung Park | SVP & GM of FPD Ops | Sell | −13,750 | −$470.81K |
| 2026-01-16 | Kang Jyh Lee | Director | Sell | −10,000 | −$341.30K |
| 2026-01-15 | Kang Jyh Lee | Director | Sell | −10,000 | −$344.20K |
| 2026-01-14 | Kang Jyh Lee | Director | Sell | −10,000 | −$330.50K |
| 2026-01-09 | Kang Jyh Lee | Director | Sell | −10,000 | −$348.30K |
| 2026-01-07 | Han Kyung Park | SVP & GM of FPD Ops | A | +23,945 | — |
| 2026-01-07 | Eric Rivera | EVP, CFO | A | +40,407 | — |
| 2026-01-07 | David A. Garcia | Director | A | +1,272 | — |
| 2026-01-07 | Adam M Lewis | Director | A | +1,272 | — |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| George Macricostas | CEO | 448,762 | $12.51M |
| Constantine S Macricostas | Director | 414,617 | $11.56M |
| Kang Jyh Lee | Director | 337,350 | $9.40M |
| Christopher J Progler | EVP, Chief Technology Officer | 165,591 | $4.62M |
| Eric Rivera | President, CFO | 133,276 | $3.71M |
| Hsueh-Chun Wang | SVP/COO IC & US/EU Mnstrm Ops | 113,560 | $3.16M |
| Daniel JL Liao | Director | 72,504 | $2.02M |
| Han Kyung Park | SVP & GM of FPD Ops | 66,000 | $1.84M |
| Mitchell G Tyson | Director | 36,921 | $1.03M |
| Adam M Lewis | Director | 34,792 | $969.65K |
| Rui Zhang | VP, CAO & Corporate Controller | 26,687 | $743.77K |
| Todd Anthony Alesio | SVP, CAO | 17,946 | $500.16K |
| David A. Garcia | Director | 15,192 | $423.40K |
| Walter M Fiederowicz | Director | 5,000 | $139.35K |
| Michelle Almeida | Director | 4,956 | $138.12K |
| Mary Paladino | Director | 1,272 | $35.45K |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the PLAB quote page; the site-wide leaderboard is on the insider transactions hub.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.