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Photronics Inc (PLAB)
NASDAQ: PLAB · Real-Time Price · USD
Technology · Semiconductor Equipment & Materials
28.25+0.10 (+0.35%)
Market cap
$1.67B
Website
Insider Score
––Not scored
PLAB Insider Score
Insiders filed in the last 90 days, but none of those trades qualified for scoring — round-trip buys and filings whose price is far off the market are excluded.
PLAB Stock Insider Trading Activity
PLAB stock’s insider trading shows 4 sales on the open market for an estimated $1.11M by company insiders over the last 6 months.
Not enough price history.
Insider Trading Activity (Form 4 Filings)
An insider trade occurs when an individual that has non-public information about a company buys or sells shares of that company’s stock. Examples of insiders include a company’s executive officers (CEO, CFO, COO), its board of directors, and its major shareholders. Insiders are required to submit their trading activity to the SEC through Form 4 filings.
Scored window · last 90 days0 qualifying buys0 insiders$0 bought— these are the numbers in the rankings table; the full history below shows every filing (buys, sells and older activity).
| Insider | Action | Shares | Avg Cost | Total | Δ Holdings | Held After | Date | Grade | Form 4 |
|---|---|---|---|---|---|---|---|---|---|
| ZHANG RUI Other | Tax withheld | 392 | $30.83 | $12.09K | 1.4% | 26,687 | Oct 1, 2026 | — | Form 4 |
| Rivera Eric CFO | Tax withheld | 2,897 | $30.83 | $89.31K | 2.1% | 133,276 | Oct 1, 2026 | — | Form 4 |
| Lee Kang Jyh Director | Sell | 10,000 | $30.75 | $307.50K | 2.9% | 337,350 | Sep 29, 2026 | — | Form 4 |
| Park Han Kyung Other | Sell | 9,500 | $30.37 | $288.51K | 12.6% | 66,000 | Sep 25, 2026 | — | Form 4 |
| Lee Kang Jyh Director | Sell | 7,500 | $29.50 | $221.25K | 2.1% | 347,350 | Sep 24, 2026 | — | Form 4 |
| Lee Kang Jyh Director | Sell | 10,000 | $29.70 | $297.00K | 2.7% | 354,850 | Sep 22, 2026 | — | Form 4 |
| ZHANG RUI Other | Sell | 4,556 | $46.70 | $212.77K | 14.4% | 27,079 | Apr 17, 2026 | — | Form 4 |
| Lee Kang Jyh Director | Sell | 10,000 | $45.80 | $458.00K | 2.7% | 355,850 | Apr 16, 2026 | — | Form 4 |
| Lee Kang Jyh Director | Sell | 10,000 | $46.05 | $460.50K | 2.7% | 365,850 | Apr 16, 2026 | — | Form 4 |
| Lee Kang Jyh Director | Sell | 10,000 | $45.10 | $451.00K | 2.6% | 375,850 | Apr 15, 2026 | — | Form 4 |
| Wang Hsueh-Chun COO | Sell | 19,250 | $45.30 | $872.02K | 14.5% | 113,560 | Apr 14, 2026 | — | Form 4 |
| MACRICOSTAS CONSTANTINE S Director | Sell | 50,000 | $45.35 | $2.27M | 100% | 0 | Apr 14, 2026 | — | Form 4 |
| Liao Daniel JL Director | Award | 3,722 | — | — | 5.4% | 72,504 | Apr 13, 2026 | — | Form 4 |
| LEWIS ADAM M Director | Award | 3,722 | — | — | 12.0% | 34,792 | Apr 13, 2026 | — | Form 4 |
| TYSON MITCHELL G Director | Award | 3,722 | — | — | 11.2% | 36,921 | Apr 13, 2026 | — | Form 4 |
| Garcia David A. Director | Award | 3,722 | — | — | 32.4% | 15,192 | Apr 13, 2026 | — | Form 4 |
| Almeida Michelle Director | Award | 3,722 | — | — | 302% | 4,956 | Apr 13, 2026 | — | Form 4 |
| MACRICOSTAS CONSTANTINE S Director | Award | 3,722 | — | — | 0.9% | 414,617 | Apr 13, 2026 | — | Form 4 |
| Lee Kang Jyh Director | Option exercise | 5,000 | $8.60 | $43.00K | 1.3% | 390,850 | Apr 13, 2026 | — | Form 4 |
| Lee Kang Jyh Director | Sell | 5,000 | $45.00 | $225.00K | 1.3% | 385,850 | Apr 13, 2026 | — | Form 4 |
| Rivera Eric CFO | Option exercise | 1,000 | $9.78 | $9.78K | 0.7% | 137,173 | Apr 13, 2026 | — | Form 4 |
| Rivera Eric CFO | Sell | 1,000 | $44.77 | $44.77K | 0.7% | 136,173 | Apr 13, 2026 | — | Form 4 |
| Rivera Eric CFO | Sell | 40,635 | $44.00 | $1.79M | 23.0% | 136,173 | Apr 9, 2026 | — | Form 4 |
| Lee Kang Jyh Director | Sell | 5,000 | $44.00 | $220.00K | 1.3% | 385,850 | Apr 9, 2026 | — | Form 4 |
| Lee Kang Jyh Director | Option exercise | 5,000 | $8.60 | $43.00K | 1.3% | 390,850 | Apr 9, 2026 | — | Form 4 |
| Wang Hsueh-Chun COO | Sell | 11,875 | $44.25 | $525.47K | 8.2% | 132,810 | Apr 9, 2026 | — | Form 4 |
| Rivera Eric CFO | Sell | 882 | $44.00 | $38.81K | 0.5% | 176,808 | Apr 9, 2026 | — | Form 4 |
| Lee Kang Jyh Director | Sell | 5,000 | $43.27 | $216.35K | 1.3% | 385,850 | Apr 8, 2026 | — | Form 4 |
| ZHANG RUI Other | Sell | 1,752 | $43.50 | $76.21K | 5.2% | 31,635 | Apr 8, 2026 | — | Form 4 |
What these mean— the action is the SEC’s own Form 4 transaction code. Only a buy or a sell is an open-market trade; the rest are transfers, awards and exercises, which is why they carry no price.
- Sell (S) — Open-market or private sale
- Award (A) — Grant or award from the company, not a purchase
- Tax withheld (F) — Shares withheld to pay tax or an exercise price
- Option exercise (M) — Exercise or conversion of an exempt derivative
Disclaimer — Informational only — not investment advice. Insider transaction data is sourced from SEC Form 4 filings; market data from public feeds and may be delayed. The Insider Score is a proprietary score for research purposes and does not predict future performance. Always do your own research.