Photronics, Inc. (PLAB) Insider Trading
Over the last 6 months, 214 institutions increased and 233 reduced their position (13F).
Insider Activity
Sentiment
50/100
Buys (3m)
0
Sells (3m)
0
Net (3m)
$0
Insider trades by month Buys Sells
Sep
Oct
Dec
Jan
Mar
Apr
Context3-month price -13.1%Institutions mixed (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Apr 21, 2026 | ZHANG RUIofficer: VP, CAO & Corporate Controller | Sell | 4,556 | $46.70 |
| Apr 20, 2026 | Lee Kang Jyhdirector | Sell | 10,000 | $46.05 |
| Apr 17, 2026 | Lee Kang Jyhdirector | Sell | 10,000 | $45.10 |
| Apr 16, 2026 | Wang Hsueh-Chunofficer: SVP/COO IC & US/EU Mnstrm Ops | Sell | 19,250 | $45.30 |
| Apr 15, 2026 | Lee Kang Jyhdirector | Sell | 5,000 | $45.00 |
| Apr 15, 2026 | Rivera Ericofficer: President, CFO | Option | 1,000 | $9.78 |
| Apr 15, 2026 | MACRICOSTAS CONSTANTINE Sdirector | Grant | 3,722 | — |
| Apr 15, 2026 | Liao Daniel JLdirector | Grant | 3,722 | — |
| Apr 15, 2026 | Garcia David A.director | Grant | 3,722 | — |
| Apr 15, 2026 | Rivera Ericofficer: President, CFO | Sell | 1,000 | $44.77 |
| Apr 15, 2026 | Almeida Michelledirector | Grant | 3,722 | — |
| Apr 15, 2026 | TYSON MITCHELL Gdirector | Grant | 3,722 | — |
| Apr 15, 2026 | LEWIS ADAM Mdirector | Grant | 3,722 | — |
| Apr 15, 2026 | Lee Kang Jyhdirector | Option | 5,000 | $8.60 |
| Apr 14, 2026 | MACRICOSTAS CONSTANTINE Sdirector | Sell | 50,000 | $45.35 |
| Apr 13, 2026 | Wang Hsueh-Chunofficer: SVP/COO IC & US/EU Mnstrm Ops | Sell | 11,875 | $44.25 |
| Apr 13, 2026 | Rivera Ericofficer: President, CFO | Sell | 882 | $44.00 |
| Apr 13, 2026 | Lee Kang Jyhdirector | Sell | 5,000 | $44.00 |
| Apr 13, 2026 | Rivera Ericofficer: President, CFO | Sell | 40,635 | $44.00 |
| Apr 13, 2026 | Lee Kang Jyhdirector | Option | 5,000 | $8.60 |
| Apr 10, 2026 | Wang Hsueh-Chunofficer: SVP/COO IC & US/EU Mnstrm Ops | Sell | 10,000 | $42.69 |
| Apr 10, 2026 | ZHANG RUIofficer: VP, CAO & Corporate Controller | Sell | 1,752 | $43.50 |
| Apr 10, 2026 | MACRICOSTAS GEORGEofficer: CEO | Sell | 5,500 | $43.28 |
| Apr 10, 2026 | Lee Kang Jyhdirector | Sell | 5,000 | $43.27 |
| Apr 10, 2026 | MACRICOSTAS GEORGEofficer: CEO | Sell | 6,500 | $43.27 |
| Apr 10, 2026 | Lee Kang Jyhdirector | Option | 5,000 | $8.60 |
| Apr 10, 2026 | MACRICOSTAS GEORGEofficer: CEO | Sell | 109,194 | $42.90 |
| Apr 8, 2026 | Lee Kang Jyhdirector | Sell | 5,000 | $40.53 |
| Apr 8, 2026 | Lee Kang Jyhdirector | Option | 5,000 | $8.60 |
| Apr 3, 2026 | Wang Hsueh-Chunofficer: SVP/COO IC & US/EU Mnstrm Ops | Sell | 4,186 | $42.00 |
Source: PLAB SEC Form 4 filings, latest Apr 21, 2026. For informational purposes only — not investment advice.
Institutional activity (13F)
How institutions changed their PLAB positions over the last 6 months (SEC Form 13F).
Increased
214
New positions
138
Reduced
233
Sold out
73
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| BlackRock, Inc. | Increased | 9.5M | Aug 7, 2026 |
| BLACKROCK, INC. | Increased | 9.4M | May 13, 2026 |
| DIMENSIONAL FUND ADVISORS LP | Reduced | 4.0M | May 7, 2026 |
| DIMENSIONAL FUND ADVISORS LP | Reduced | 3.6M | Aug 11, 2026 |
| AMERICAN CENTURY COMPANIES INC | Increased | 3.4M | Aug 12, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Increased | 3.0M | Aug 13, 2026 |
| LSV ASSET MANAGEMENT | Reduced | 2.9M | May 11, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | New Position | 2.8M | May 8, 2026 |
| AMERICAN CENTURY COMPANIES INC | Increased | 2.8M | May 15, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 2.5M | May 15, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | Reduced | 2.5M | Aug 13, 2026 |
| STATE STREET CORP | Increased | 2.3M | Aug 7, 2026 |
| STATE STREET CORP | Reduced | 2.2M | May 15, 2026 |
| LSV ASSET MANAGEMENT | Reduced | 2.2M | Aug 6, 2026 |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 2.2M | Aug 12, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.