PLAB insider buying and SEC filings, explained
Photronics Inc. · CIK 810136
Tracked: Forms 3/4/5, 8-K, NT · All filings on sec.gov
Insider activity in the last 12 months
Bought
$0
Insiders who bought
0
Sold (not marked 10b5-1)
$21.9M
Planned sales (10b5-1)
$225K
Insider purchases and sales, last 12 months
| Traded | Type | What was filed | Source |
|---|---|---|---|
| Sep 29, 2026 | Sale | Kang Jyh Lee (Director) sold 10,000 shares at about $30.75 ($308K). Holdings down 3% to 337,350 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Oct 1, 2026, 8:52 PM ET |
| Sep 25, 2026 | Sale | Han Kyung Park (SVP & GM of FPD Ops) sold 9,500 shares at $30.37 ($289K). Holdings down 13% to 66,000 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Sep 29, 2026 |
| Sep 24, 2026 | Sale | Kang Jyh Lee (Director) sold 7,500 shares at $29.50 ($221K). Holdings down 2% to 347,350 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Sep 28, 2026 |
| Sep 22, 2026 | Sale | Kang Jyh Lee (Director) sold 10,000 shares at $29.70 ($297K). Holdings down 3% to 354,850 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Sep 24, 2026 |
| Apr 17, 2026 | Sale | Rui Zhang (VP, CAO & Corporate Controller) sold 4,556 shares at $46.70 ($213K). Holdings down 14% to 27,079 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Apr 21, 2026 |
| Apr 16, 2026 | Sale | Kang Jyh Lee (Director) sold 20,000 shares at about $45.93 ($919K). Holdings down 5% to 355,850 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Apr 20, 2026 |
| Apr 15, 2026 | Sale | Kang Jyh Lee (Director) sold 10,000 shares at $45.10 ($451K). Holdings down 3% to 375,850 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Apr 17, 2026 |
| Apr 14, 2026 | Sale | Hsueh-Chun Wang (President / COO) sold 19,250 shares at about $45.30 ($872K). Holdings down 14% to 113,560 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Apr 16, 2026 |
| Apr 14, 2026 | Sale | Constantine S. Macricostas (Director) sold 50,000 shares indirectly (by entity) at $45.35 ($2.3M). Holdings by entity down 100% to 0 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Apr 14, 2026 |
| Apr 9, 2026 | Sale | Hsueh-Chun Wang (President / COO) sold 11,875 shares at about $44.25 ($525K). Holdings down 8% to 132,810 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Apr 13, 2026 |
| Apr 9, 2026 | Sale | Eric Rivera (CFO) sold 41,517 shares at $44.00 ($1.8M). Holdings down 23% to 136,173 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Apr 13, 2026 |
| Apr 8, 2026 | Sale | George Macricostas (CEO) sold 121,194 shares at about $42.94 ($5.2M). Holdings down 27% to 334,068 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Apr 10, 2026 |
| Apr 8, 2026 | Sale | Rui Zhang (VP, CAO & Corporate Controller) sold 1,752 shares at $43.50 ($76K). Holdings down 5% to 31,635 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Apr 10, 2026 |
| Apr 8, 2026 | Sale | Hsueh-Chun Wang (President / COO) sold 10,000 shares at about $42.69 ($427K). Holdings down 6% to 144,685 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Apr 10, 2026 |
| Apr 1, 2026 | Sale | Mitchell G. Tyson (Director) sold 10,000 shares at about $42.31 ($423K). Holdings down 23% to 33,199 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Apr 3, 2026 |
| Apr 1, 2026 | Sale | Hsueh-Chun Wang (President / COO) sold 10,000 shares at about $42.08 ($421K). Holdings down 6% to 154,685 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Apr 3, 2026 |
| Mar 23, 2026 | Sale | Kang Jyh Lee (Director) sold 10,000 shares at $39.00 ($390K). Holdings down 3% to 385,850 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Mar 25, 2026 |
| Mar 19, 2026 | Sale | Kang Jyh Lee (Director) sold 10,000 shares at $35.80 ($358K). Holdings down 2% to 400,850 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Mar 24, 2026 |
| Jan 16, 2026 | Sale | Kang Jyh Lee (Director) sold 10,000 shares at $34.51 ($345K). Holdings down 2% to 410,850 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jan 20, 2026 |
| Jan 13–16, 2026 | Sale | Han Kyung Park (SVP & GM of FPD Ops) sold 13,750 shares between Jan 13 and Jan 16 at about $34.24 ($471K). Holdings down 15% to 75,500 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jan 20, 2026 |
| Jan 15, 2026 | Sale | Kang Jyh Lee (Director) sold 10,000 shares at $34.13 ($341K). Holdings down 2% to 415,850 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jan 16, 2026 |
| Jan 13, 2026 | Sale | Kang Jyh Lee (Director) sold 10,000 shares at $34.42 ($344K). Holdings down 2% to 425,850 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jan 15, 2026 |
| Jan 12, 2026 | Sale | Kang Jyh Lee (Director) sold 10,000 shares at $33.05 ($331K). Holdings down 2% to 435,850 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jan 14, 2026 |
| Jan 7, 2026 | Sale | Kang Jyh Lee (Director) sold 10,000 shares at $34.83 ($348K). Holdings down 2% to 445,850 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jan 9, 2026 |
| Jan 5–6, 2026 | Sale | Kang Jyh Lee (Director) sold 20,000 shares between Jan 5 and Jan 6 at about $34.66 ($693K). Holdings down 4% to 455,850 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jan 7, 2026 |
| Jan 6, 2026 | Sale | Mary Paladino (Director) sold 11,250 shares at $35.11 ($395K). Holdings down 32% to 23,820 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jan 7, 2026 |
| Jan 6, 2026 | Sale | Mitchell G. Tyson (Director) sold 5,000 shares at $35.21 ($176K). Holdings down 10% to 43,199 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jan 7, 2026 |
| Jan 2, 2026 | Sale | Kang Jyh Lee (Director) sold 8,750 shares at $33.54 ($293K). Holdings down 2% to 475,850 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jan 6, 2026 |
| Dec 22, 2025 | Sale | Kang Jyh Lee (Director) sold 8,750 shares at $34.31 ($300K). Holdings down 2% to 484,600 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Dec 23, 2025 |
| Dec 12, 2025 | Sale | Christopher J Progler (EVP, Chief Technology Officer) sold 25,000 shares at about $35.78 ($895K). Holdings down 13% to 165,591 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Dec 16, 2025 |
| Dec 12, 2025 | Sale | Mitchell G. Tyson (Director) sold 5,000 shares at $36.17 ($181K). Holdings down 10% to 46,927 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Dec 16, 2025 |
| Dec 12, 2025 | Sale | Han Kyung Park (SVP & GM of FPD Ops) sold 13,750 shares at $37.99 ($522K). Holdings down 13% to 89,250 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Dec 16, 2025 |
| Dec 12, 2025 | Sale | Kang Jyh Lee (Director) sold 20,000 shares at $38.53 ($771K). Holdings down 4% to 493,350 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Dec 16, 2025 |
| Dec 1, 2025 | Planned (10b5-1) | Christopher J Progler (EVP, Chief Technology Officer) sold 10,000 shares at about $22.52 ($225K), marked as a 10b5-1 plan trade. Holdings down 5% to 190,591 shares. | SEC filing Filed Dec 2, 2025 |
41 routine transactions (such as grants, option exercises or tax withholding) are not listed.
Cluster buys
No cluster buys in the last 12 months.
Red flags
No red flags in the last 12 months.
Key events
No key events in the last 12 months.
8-K filings, last 12 months
No 8-K filings in the last 12 months.
Red flags are objective triggers only: the item or form filed, never an opinion.
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