Who owns Photronics (PLAB)
Which tracked institutional funds hold PLAB, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See PLAB company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
Conviction spread
PLAB’s largest tracked holder by dollar value, BlackRock, Inc., sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp gap the other way — the median holder sizes PLAB more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in PLAB divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, we do not read how tracked institutions changed their PLAB positions: many holders could not be matched across the two filings, most often because the security’s identifier changed and our mapping is incomplete, or because funds are still filing for the newer quarter. Over the same quarter, open-market insider Form 4s were net sales.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. added | 9,486,185 | $309M | 18.9% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP trimmed | 3,642,585 | $118M | 7.3% | 2026-Q2 |
| AMERICAN CENTURY COMPANIES INC added | 3,387,380 | $110M | 6.8% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC added | 2,972,130 | $97M | 5.9% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC trimmed | 2,501,565 | $81M | 5.0% | 2026-Q2 |
| STATE STREET CORP added | 2,339,871 | $76M | 4.7% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 2,167,677 | $71M | 4.3% | 2026-Q2 |
| Invesco Ltd. added | 1,840,112 | $60M | 3.7% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 1,571,254 | $51M | 3.1% | 2026-Q2 |
| VICTORY CAPITAL MANAGEMENT INC trimmed | 1,462,087 | $48M | 2.9% | 2026-Q2 |
| VAUGHAN NELSON INVESTMENT MANAGEMENT, L.P. trimmed | 1,071,105 | $35M | 2.1% | 2026-Q2 |
| MORGAN STANLEY trimmed | 1,015,694 | $33M | 2.0% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 972,738 | $32M | 1.9% | 2026-Q2 |
| NORTHERN TRUST CORP added | 888,983 | $29M | 1.8% | 2026-Q2 |
| Boston Partners trimmed | 665,700 | $21M | 1.3% | 2026-Q2 |
| NEEDHAM INVESTMENT MANAGEMENT LLC trimmed | 585,500 | $19M | 1.2% | 2026-Q2 |
| EASTERLY INVESTMENT PARTNERS LLC added | 466,274 | $15M | 0.9% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC trimmed | 414,691 | $13M | 0.8% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 397,969 | $13M | 0.8% | 2026-Q2 |
| Bank of New York Mellon Corp added | 380,402 | $12M | 0.8% | 2026-Q2 |
| HEARTLAND ADVISORS INC added | 379,795 | $12M | 0.8% | 2026-Q2 |
| SEGALL BRYANT & HAMILL, LLC added | 374,171 | $12M | 0.7% | 2026-Q2 |
| Allianz Asset Management GmbH | 369,478 | $15M | 0.9% | 2026-Q2 |
| TCW GROUP INC added | 355,820 | $12M | 0.7% | 2026-Q2 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC trimmed | 352,834 | $11M | 0.7% | 2026-Q2 |
| ROYCE & ASSOCIATES LP trimmed | 341,476 | $11M | 0.7% | 2026-Q2 |
| PRINCIPAL FINANCIAL GROUP INC added | 337,969 | $11M | 0.7% | 2026-Q2 |
| Cambria Investment Management, L.P. added | 331,505 | $11M | 0.7% | 2026-Q2 |
| Qube Research & Technologies Ltd trimmed | 327,302 | $11M | 0.7% | 2026-Q2 |
| HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC trimmed | 325,909 | $11M | 0.7% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP added | 301,984 | $10M | 0.6% | 2026-Q2 |
| Nuveen, LLC added | 299,784 | $10M | 0.6% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC trimmed | 299,279 | $10M | 0.6% | 2026-Q2 |
| Polar Capital Holdings Plc trimmed | 299,195 | $10M | 0.6% | 2026-Q2 |
| UBS Group AG added | 286,305 | $9M | 0.6% | 2026-Q2 |
| Empowered Funds, LLC trimmed | 271,855 | $9M | 0.5% | 2026-Q2 |
| Meros Investment Management, LP added | 237,567 | $8M | 0.5% | 2026-Q2 |
| LONE PEAK GLOBAL INVESTORS LLC added | 225,085 | $7M | 0.4% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ added | 217,404 | $7M | 0.4% | 2026-Q2 |
| Public Sector Pension Investment Board trimmed | 202,704 | $7M | 0.4% | 2026-Q2 |
| KESTREL INVESTMENT MANAGEMENT CORP | 200,450 | $7M | 0.4% | 2026-Q2 |
| PRUDENTIAL FINANCIAL INC trimmed | 184,041 | $6M | 0.4% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 171,533 | $6M | 0.3% | 2026-Q2 |
| RHUMBLINE ADVISERS added | 170,084 | $6M | 0.3% | 2026-Q2 |
| Inspire Investing, LLC added | 160,990 | $5M | 0.3% | 2026-Q2 |
| Universal- Beteiligungs- und Servicegesellschaft mbH trimmed | 158,083 | $5M | 0.3% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC added | 153,502 | $5M | 0.3% | 2026-Q2 |
| JPMORGAN CHASE & CO trimmed | 153,437 | $5M | 0.3% | 2026-Q2 |
| Connor, Clark & Lunn Investment Management Ltd. added | 150,058 | $5M | 0.3% | 2026-Q2 |
| Legal & General Group Plc trimmed | 133,896 | $4M | 0.3% | 2026-Q2 |
| O'SHAUGHNESSY ASSET MANAGEMENT, LLC trimmed | 127,481 | $4M | 0.3% | 2026-Q2 |
| CastleKnight Management LP new | 117,300 | $4M | 0.2% | 2026-Q2 |
| INTECH INVESTMENT MANAGEMENT LLC added | 116,691 | $4M | 0.2% | 2026-Q2 |
| LAZARD ASSET MANAGEMENT LLC trimmed | 116,546 | $4M | 0.2% | 2026-Q2 |
| CITADEL ADVISORS LLC added | 116,379 | $4M | 0.2% | 2026-Q2 |
| Swiss National Bank trimmed | 112,400 | $4M | 0.2% | 2026-Q2 |
| SEI INVESTMENTS CO trimmed | 111,879 | $4M | 0.2% | 2026-Q2 |
| Aquatic Capital Management LLC added | 110,256 | $4M | 0.2% | 2026-Q2 |
| Long Corridor Asset Management Ltd new | 110,000 | $4M | 0.2% | 2026-Q2 |
| WEDGE CAPITAL MANAGEMENT L L P/NC added | 109,646 | $4M | 0.2% | 2026-Q2 |
| FIRST TRUST ADVISORS LP trimmed | 107,397 | $3M | 0.2% | 2026-Q2 |
| D. E. Shaw & Co., Inc. trimmed | 105,419 | $3M | 0.2% | 2026-Q2 |
| VOYA INVESTMENT MANAGEMENT LLC trimmed | 102,166 | $3M | 0.2% | 2026-Q2 |
| ISTHMUS PARTNERS, LLC added | 99,477 | $3M | 0.2% | 2026-Q2 |
| ROYAL BANK OF CANADA trimmed | 97,352 | $3M | 0.2% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 97,262 | $3M | 0.2% | 2026-Q2 |
| Uncommon Cents Investing LLC added | 89,595 | $3M | 0.2% | 2026-Q2 |
| Pictet Asset Management Holding SA added | 89,568 | $3M | 0.2% | 2026-Q2 |
| Penbrook Management LLC trimmed | 89,055 | $3M | 0.2% | 2026-Q2 |
| HUSSMAN STRATEGIC ADVISORS, INC. new | 84,000 | $3M | 0.2% | 2026-Q2 |
| Skylands Capital, LLC trimmed | 81,510 | $3M | 0.2% | 2026-Q2 |
| Linden Thomas Advisory Services, LLC added | 81,271 | $3M | 0.2% | 2026-Q2 |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ trimmed | 80,403 | $3M | 0.2% | 2026-Q2 |
| IMC-Chicago, LLC new | 80,294 | $3M | 0.2% | 2026-Q2 |
| STATE OF WISCONSIN INVESTMENT BOARD trimmed | 80,055 | $3M | 0.2% | 2026-Q2 |
| CITIGROUP INC trimmed | 77,537 | $3M | 0.2% | 2026-Q2 |
| Clear Street Group Inc. new | 76,851 | $2M | 0.2% | 2026-Q2 |
| New Age Alpha Advisors, LLC trimmed | 75,481 | $2M | 0.2% | 2026-Q2 |
| Creative Planning trimmed | 75,346 | $2M | 0.2% | 2026-Q2 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. trimmed | 73,367 | $2M | 0.1% | 2026-Q2 |
| DEUTSCHE BANK AG\ added | 70,596 | $2M | 0.1% | 2026-Q2 |
| NorthCrest Asset Manangement, LLC added | 69,134 | $2M | 0.1% | 2026-Q2 |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM trimmed | 68,580 | $2M | 0.1% | 2026-Q2 |
| Russell Investments Group, Ltd. added | 68,270 | $2M | 0.1% | 2026-Q2 |
| Allspring Global Investments Holdings, LLC trimmed | 67,270 | $2M | 0.1% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN added | 66,159 | $2M | 0.1% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM trimmed | 65,001 | $2M | 0.1% | 2026-Q2 |
| Pacific Ridge Capital Partners, LLC added | 63,210 | $2M | 0.1% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. added | 62,762 | $3M | 0.2% | 2026-Q2 |
| FRANKLIN RESOURCES INC trimmed | 59,520 | $2M | 0.1% | 2026-Q2 |
| MARTINGALE ASSET MANAGEMENT L P trimmed | 55,930 | $2M | 0.1% | 2026-Q2 |
| LPL Financial LLC added | 54,090 | $2M | 0.1% | 2026-Q2 |
| DENALI ADVISORS LLC trimmed | 52,353 | $2M | 0.1% | 2026-Q2 |
| Torrey Growth & Income Advisors new | 51,800 | $2M | 0.1% | 2026-Q2 |
| Grantham, Mayo, Van Otterloo & Co. LLC added | 49,781 | $2M | 0.1% | 2026-Q2 |
| Tuttle Capital Management, LLC new | 49,272 | $2M | 0.1% | 2026-Q2 |
| SIMPLEX TRADING, LLC added | 45,187 | $1M | 0.1% | 2026-Q2 |
| Kendall Capital Management trimmed | 44,032 | $1M | 0.1% | 2026-Q2 |
| ENVESTNET ASSET MANAGEMENT INC trimmed | 41,893 | $1M | 0.1% | 2026-Q2 |
| JAMES INVESTMENT RESEARCH, INC. added | 41,586 | $1M | 0.1% | 2026-Q2 |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.