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PLAB · Photronics Inc

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$30.51 -0.01 (-0.03%) At close · Aug 21
Market Cap
$1.80B
Shares
58.96M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 318
Total Value: $1,842,365,162
Total Shares: 56,600,346

Institutional Ownership Trend

26 quarters

Superinvestors Holding PLAB

All superinvestors →

Holder Concentration

Across 318 13F filers · Δ vs Mar 31, 2026
Top Holder
16.7%
Sep 2023 → Jun 2026 · range 15.7% – 19.2%
−0.0 pts
Top 5
38.8%
Sep 2023 → Jun 2026 · range 38.8% – 46.4%
−0.3 pts
Top 10
56.7%
Sep 2023 → Jun 2026 · range 54.4% – 61.0%
−0.3 pts
HHI
505
Sep 2023 → Jun 2026 · range 505 – 652
Broadly held−4

Quarterly Activity

vs Mar 31, 2026
New
61
Increased
105
Decreased
117
Sold Out
78
Unchanged
35
Holder count: -17
Institutional value: -18.5%
Shares held: +0.9%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 328
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 810136 CUSIP 719405102 13F (30d) 268 filings 266 filers Visit website Investor relations