As of the latest Form 4 filed Apr 21, 2026.
What Photronics Inc insiders — officers, directors and 10% owners — have bought and sold in their own stock, straight from their SEC Form 4 filings. Values are shares × the reported transaction price where both are disclosed.
Buys plotted up, sells down; bar height is the disclosed dollar value (shares × reported price). Our Form 4 history is only complete from mid-2026, so early months are sparse — the series fills in as more filings land. Open-market purchases and sales only.
Newest filing first — the 70 most recent filings for PLAB.
| Filed | Trade date | Insider | Transaction | Shares | Price | Value | 10b5-1 | Filing |
|---|---|---|---|---|---|---|---|---|
| 2026-04-21 | 2026-04-17 | ZHANG RUI VP, CAO & Corporate Controller | SSale | −4.56K | $46.70 | $213K | No | Form 4 ↗ |
| 2026-04-21 | 2026-04-17 | Paladino Mary Director | DDisposition | −22.5K | $47.77 | $1.08M | No | Form 4 ↗ |
| 2026-04-20 | 2026-04-16 | Lee Kang Jyh Director | SSale | −10.0K | $45.80 | $458K | No | Form 4 ↗ |
| 2026-04-20 | 2026-04-16 | Lee Kang Jyh, Director | SSale | −10.0K | $46.05 | $461K | No | Form 4 ↗ |
| 2026-04-17 | 2026-04-15 | Lee Kang Jyh Director | SSale | −10.0K | $45.10 | $451K | No | Form 4 ↗ |
| 2026-04-16 | 2026-04-14 | Wang Hsueh-Chun SVP/COO IC & US/EU Mnstrm Ops | SSale | −19.3K | $45.30 | $872K | No | Form 4 ↗ |
| 2026-04-15 | 2026-04-13 | TYSON MITCHELL G Director | AAward | +3.72K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-15 | 2026-04-13 | Garcia David A. Director | AAward | +3.72K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-15 | 2026-04-13 | Almeida Michelle Director | AAward | +3.72K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-15 | 2026-04-13 | Liao Daniel JL Director | AAward | +3.72K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-15 | 2026-04-13 | LEWIS ADAM M Director | AAward | +3.72K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-15 | 2026-04-13 | MACRICOSTAS CONSTANTINE S Director | AAward | +3.72K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-15 | 2026-04-13 | Lee Kang Jyh Director | SSale | −5.00K | $45.00 | $225K | No | Form 4 ↗ |
| 2026-04-15 | 2026-04-13 | Lee Kang Jyh, Director | MExercise | +5.00K | $8.60 | $43.0K | No | Form 4 ↗ |
| 2026-04-15 | 2026-04-13 | Rivera Eric President, CFO | SSale | −1.00K | $44.77 | $44.8K | No | Form 4 ↗ |
| 2026-04-15 | 2026-04-13 | Rivera Eric, President, CFO | MExercise | +1.00K | $9.78 | $9.78K | No | Form 4 ↗ |
| 2026-04-14 | 2026-04-14 | MACRICOSTAS CONSTANTINE S Director | SSale | −50.0K | $45.35 | $2.27M | No | Form 4 ↗ |
| 2026-04-14 | 2026-04-02 | MACRICOSTAS CONSTANTINE S Director | GGift | −37.0K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-14 | 2026-04-01 | MACRICOSTAS CONSTANTINE S, Director | GGift | −13.0K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-13 | 2026-04-09 | Wang Hsueh-Chun SVP/COO IC & US/EU Mnstrm Ops | SSale | −11.9K | $44.25 | $525K | No | Form 4 ↗ |
| 2026-04-13 | 2026-04-09 | Rivera Eric President, CFO | SSale | −40.6K | $44.00 | $1.79M | No | Form 4 ↗ |
| 2026-04-13 | 2026-04-09 | Rivera Eric, President, CFO | SSale | −882.00 | $44.00 | $38.8K | No | Form 4 ↗ |
| 2026-04-13 | 2026-04-09 | Lee Kang Jyh Director | SSale | −5.00K | $44.00 | $220K | No | Form 4 ↗ |
| 2026-04-13 | 2026-04-09 | Lee Kang Jyh, Director | MExercise | +5.00K | $8.60 | $43.0K | No | Form 4 ↗ |
| 2026-04-10 | 2026-04-08 | MACRICOSTAS GEORGE CEO | SSale | −109K | $42.90 | $4.68M | No | Form 4 ↗ |
| 2026-04-10 | 2026-04-08 | MACRICOSTAS GEORGE, CEO | SSale | −5.50K | $43.28 | $238K | No | Form 4 ↗ |
| 2026-04-10 | 2026-04-08 | MACRICOSTAS GEORGE, CEO | SSale | −6.50K | $43.27 | $281K | No | Form 4 ↗ |
| 2026-04-10 | 2026-04-08 | ZHANG RUI VP, CAO & Corporate Controller | SSale | −1.75K | $43.50 | $76.2K | No | Form 4 ↗ |
| 2026-04-10 | 2026-04-08 | Wang Hsueh-Chun SVP/COO IC & US/EU Mnstrm Ops | SSale | −10.0K | $42.69 | $427K | No | Form 4 ↗ |
| 2026-04-10 | 2026-04-08 | Lee Kang Jyh Director | SSale | −5.00K | $43.27 | $216K | No | Form 4 ↗ |
| 2026-04-10 | 2026-04-08 | Lee Kang Jyh, Director | MExercise | +5.00K | $8.60 | $43.0K | No | Form 4 ↗ |
| 2026-04-08 | 2026-04-06 | Lee Kang Jyh Director | SSale | −5.00K | $40.53 | $203K | No | Form 4 ↗ |
| 2026-04-08 | 2026-04-06 | Lee Kang Jyh, Director | MExercise | +5.00K | $8.60 | $43.0K | No | Form 4 ↗ |
| 2026-03-30 | 2026-03-26 | Lee Kang Jyh Director | SSale | −5.00K | $40.80 | $204K | No | Form 4 ↗ |
| 2026-03-30 | 2026-03-26 | Lee Kang Jyh, Director | MExercise | +5.00K | $10.75 | $53.8K | No | Form 4 ↗ |
| 2026-03-25 | 2026-03-23 | Lee Kang Jyh Director | SSale | −10.0K | $39.00 | $390K | No | Form 4 ↗ |
| 2026-03-24 | 2026-03-19 | Lee Kang Jyh Director | SSale | −10.0K | $35.80 | $358K | No | Form 4 ↗ |
| 2026-02-11 | 2026-02-09 | ZHANG RUI VP, CAO & Corporate Controller | AAward | +1.47K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-02-11 | 2026-02-09 | Alesio Todd Anthony SVP, CAO | AAward | +983.00 | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-02-11 | 2026-02-09 | Rivera Eric President, CFO | AAward | +22.6K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-01-22 | 2026-01-20 | Liao Daniel JL Director | AAward | +1.23K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-01-22 | 2026-01-20 | Almeida Michelle Director | AAward | +1.23K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-01-20 | 2026-01-16 | Lee Kang Jyh Director | SSale | −10.0K | $34.51 | $345K | No | Form 4 ↗ |
| 2026-01-20 | 2026-01-16 | Park Han Kyung SVP & GM of FPD Ops | SSale | −6.25K | $34.89 | $218K | No | Form 4 ↗ |
| 2026-01-20 | 2026-01-13 | Park Han Kyung, SVP & GM of FPD Ops | SSale | −7.50K | $33.70 | $253K | No | Form 4 ↗ |
| 2026-01-16 | 2026-01-15 | Lee Kang Jyh Director | SSale | −10.0K | $34.13 | $341K | No | Form 4 ↗ |
| 2026-01-15 | 2026-01-13 | Lee Kang Jyh Director | SSale | −10.0K | $34.42 | $344K | No | Form 4 ↗ |
| 2026-01-14 | 2026-01-12 | Lee Kang Jyh Director | SSale | −10.0K | $33.05 | $331K | No | Form 4 ↗ |
| 2026-01-09 | 2026-01-07 | Lee Kang Jyh Director | SSale | −10.0K | $34.83 | $348K | No | Form 4 ↗ |
| 2026-01-07 | 2026-01-06 | Lee Kang Jyh Director | SSale | −10.0K | $35.41 | $354K | No | Form 4 ↗ |
| 2026-01-07 | 2026-01-06 | Paladino Mary Director | SSale | −11.3K | $35.11 | $395K | No | Form 4 ↗ |
| 2026-01-07 | 2026-01-06 | TYSON MITCHELL G Director | SSale | −5.00K | $35.21 | $176K | No | Form 4 ↗ |
| 2026-01-07 | 2026-01-05 | Lee Kang Jyh Director | SSale | −10.0K | $33.90 | $339K | No | Form 4 ↗ |
| 2026-01-07 | 2026-01-03 | Paladino Mary Director | AAward | +1.27K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-01-07 | 2026-01-03 | TYSON MITCHELL G Director | AAward | +1.27K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-01-07 | 2026-01-03 | LEWIS ADAM M Director | AAward | +1.27K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-01-07 | 2026-01-03 | Garcia David A. Director | AAward | +1.27K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-01-07 | 2026-01-03 | MACRICOSTAS CONSTANTINE S Director | AAward | +1.27K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-01-07 | 2026-01-03 | Park Han Kyung SVP & GM of FPD Ops | AAward | +23.9K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-01-07 | 2026-01-03 | Wang Hsueh-Chun SVP/COO IC & US/EU Mnstrm Ops | AAward | +28.4K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-01-07 | 2026-01-03 | Rivera Eric EVP, CFO | AAward | +40.4K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-01-07 | 2026-01-03 | MACRICOSTAS GEORGE CEO | AAward | +177K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2025-12-23 | 2025-12-22 | Lee Kang Jyh Director | SSale | −8.75K | $34.31 | $300K | No | Form 4 ↗ |
| 2025-12-16 | 2025-12-15 | Lee Kang Jyh Director | SSale | −20.0K | $36.45 | $729K | No | Form 4 ↗ |
| 2025-12-16 | 2025-12-15 | Lee Kang Jyh, Director | MExercise | +20.0K | $11.35 | $227K | No | Form 4 ↗ |
| 2025-12-16 | 2025-12-12 | Progler Christopher J EVP, Chief Technology Officer | SSale | −25.0K | $35.78 | $895K | No | Form 4 ↗ |
| 2025-12-16 | 2025-12-12 | TYSON MITCHELL G Director | SSale | −5.00K | $36.17 | $181K | No | Form 4 ↗ |
| 2025-12-16 | 2025-12-12 | Park Han Kyung SVP & GM of FPD Ops | SSale | −13.8K | $37.99 | $522K | No | Form 4 ↗ |
| 2025-12-16 | 2025-12-12 | Lee Kang Jyh Director | SSale | −20.0K | $38.53 | $771K | No | Form 4 ↗ |
| 2025-12-02 | 2025-12-01 | Progler Christopher J EVP, Chief Technology Officer | SSale | −10.0K | $22.52 | $225K | Yes (planned) | Form 4 ↗ |
Insiders — a company’s officers, directors and holders of more than 10% of its stock — must report any trade in that stock to the SEC on a Form 4 within two business days. Each row here is one transaction from those filings.
The transaction code tells you what happened: Purchase (P) and Sale (S) are open-market trades — the ones markets watch most; Award (A) is a granted stock or unit, Option exercise (M) converts options into shares, and Gift (G) is a transfer for no consideration. Awards, exercises and gifts are largely compensation or administrative, not a directional bet.
One caveat on sales: many are made under a Rule 10b5-1 plan scheduled months in advance, so a sale is not automatically a bearish signal. Insider activity is a noisy input — read it alongside the filings, not on its own.
See also PLAB’s full analysis or the market-wide insider trading feed. The tabs above jump to PLAB’s other SEC data.
Source: SEC Form 4 filings for PLAB, parsed from EDGAR. Transaction prices are as reported in the filing — SEC public-domain data, not market quotes. Values are shares × reported price where both are disclosed; grants and gifts often carry no price. A delayed record of what insiders reported, not a live position or a recommendation.
Research and education only — not financial advice. TENKis not a registered investment adviser or broker-dealer and gives no personalized advice. Every call is impersonal — identical for all users, generated on a schedule from SEC filings plus a delayed/third-party price feed — may be wrong or out of date, and is not a recommendation to buy or sell any security. The operator and an affiliated trading operation may hold or trade the securities TENK rates; see Disclosures. Past performance does not guarantee future results. Do your own research.