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NSSC

Napco Security Technologies, Inc
$37.79 -0.07 (-0.18%) At close · Jul 2
Market Cap
$1.35B
Shares
35,727,337

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.

The Jun 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out.
Holders: 271
Total Value: $1,307,592,933
Total Shares: 33,196,111
Showing 1–100 of 271 holdings by value · page 1 of 3

Institutional Ownership Trend

26 quarters

Superinvestors Holding NSSC

All superinvestors →
Terry Smith $15,109,846 Mario Gabelli $7,046,871 Joel Greenblatt $1,815,169

Holder Concentration

Across 270 13F filers
Top Holder
17.1%
Jun 2023 → Mar 2026 · range 7.2% – 17.1%
of institutional value
Top 5
36.3%
Jun 2023 → Mar 2026 · range 27.7% – 36.3%
of institutional value
Top 10
49.4%
Jun 2023 → Mar 2026 · range 41.7% – 50.3%
of institutional value
HHI
463
Jun 2023 → Mar 2026 · range 262 – 463
Broadly held
Showing 100 of 271
All Common Calls Puts
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Holder Value (USD) % of 13F Shares Open
Mega BlackRock, Inc. $223,804,914 17.12% 5,681,770
Mid Copeland Capital Management, LLC $79,138,015 6.05% 2,009,089
Mega VANGUARD CAPITAL MANAGEMENT LLC $59,288,922 4.53% 1,505,177
Mega STATE STREET CORP $56,386,903 4.31% 1,431,503
Mega JANUS HENDERSON GROUP PLC $56,129,292 4.29% 1,424,963
Mega GEODE CAPITAL MANAGEMENT, LLC $43,647,743 3.34% 1,108,092
Mega WELLINGTON MANAGEMENT GROUP LLP $36,616,903 2.80% 929,599
Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP $33,325,515 2.55% 846,040
Large PRUDENTIAL FINANCIAL INC $29,543,681 2.26% 750,030
Mega DIMENSIONAL FUND ADVISORS LP $27,685,336 2.12% 702,852
Mega FIRST TRUST ADVISORS LP $26,989,594 2.06% 685,189
Small Doma Perpetual Capital Management LLC $24,734,202 1.89% 627,931
Mega NORTHERN TRUST CORP Bank $23,016,638 1.76% 584,327
Large Point72 Asset Management, L.P. $18,996,694 1.45% 482,272
Mega ROYAL BANK OF CANADA Bank $18,771,616 1.44% 476,558
Mega MORGAN STANLEY $18,310,872 1.40% 464,861
Large RENAISSANCE TECHNOLOGIES LLC $17,205,552 1.32% 436,800
Large JACOBS LEVY EQUITY MANAGEMENT, INC $16,259,719 1.24% 412,788
Mega GOLDMAN SACHS GROUP INC $15,885,750 1.21% 403,294
Large Fundsmith LLP $15,109,846 1.16% 383,596
Mega ENVESTNET ASSET MANAGEMENT INC $14,796,380 1.13% 375,638
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $13,335,878 1.02% 338,560
Mega Bank of New York Mellon Corp Bank $11,933,866 0.91% 302,967
Large BESSEMER GROUP INC $11,536,026 0.88% 292,867
Mega AQR CAPITAL MANAGEMENT LLC $11,227,250 0.86% 285,028
Large CAPTRUST FINANCIAL ADVISORS $10,809,364 0.83% 274,419
Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC $10,715,141 0.82% 272,027
Large FEDERATED HERMES, INC. $10,621,197 0.81% 269,642
Mid Granite Investment Partners, LLC $10,537,849 0.81% 267,526
Small Visionary Wealth Advisors $10,335,975 0.79% 262,401
Large CONGRESS ASSET MANAGEMENT CO $9,942,114 0.76% 252,402
Mega VANGUARD FIDUCIARY TRUST CO Bank $9,715,188 0.74% 246,641
Large WASATCH ADVISORS LP $9,555,423 0.73% 242,585
Mid ALGERT GLOBAL LLC $9,499,134 0.73% 241,156
Mega PRINCIPAL FINANCIAL GROUP INC $8,875,118 0.68% 225,314
Mega BANK OF AMERICA CORP /DE/ Bank $8,735,321 0.67% 221,765
Large Russell Investments Group, Ltd. $8,421,062 0.64% 213,787
Large Man Group plc $8,257,325 0.63% 209,630
Mega Nuveen, LLC $7,843,690 0.60% 199,129
Mid GAMCO INVESTORS, INC. ET AL $7,046,871 0.54% 178,900
Large Trexquant Investment LP $6,741,125 0.52% 171,138
Mid KORNITZER CAPITAL MANAGEMENT INC /KS $6,670,814 0.51% 169,353
Large Qube Research & Technologies Ltd $6,563,910 0.50% 166,639
Mega CANADA PENSION PLAN INVESTMENT BOARD Pension $6,396,936 0.49% 162,400
Mid RICE HALL JAMES & ASSOCIATES, LLC $5,781,388 0.44% 146,773
Mid CRAWFORD INVESTMENT COUNSEL INC $5,486,554 0.42% 139,288
Mid CenterBook Partners LP $5,217,875 0.40% 132,467
Large SEI INVESTMENTS CO $5,176,554 0.40% 131,418
Large Public Sector Pension Investment Board Pension $5,024,352 0.38% 127,554
Mega Invesco Ltd. $4,899,681 0.37% 124,389
Large LOS ANGELES CAPITAL MANAGEMENT LLC $4,783,994 0.37% 121,452
Mid ALTA CAPITAL MANAGEMENT LLC/ $4,747,676 0.36% 120,530
Large Rockefeller Capital Management L.P. $4,679,254 0.36% 118,793
Mid DEPRINCE RACE & ZOLLO INC $4,678,074 0.36% 118,763
Small Redmond Asset Management, LLC $4,676,144 0.36% 118,714
Large HighTower Advisors, LLC $4,653,101 0.36% 118,129
Mid PDT Partners, LLC $4,619,659 0.35% 117,280
Small ISTHMUS PARTNERS, LLC $4,556,201 0.35% 115,669
Small Uniplan Investment Counsel, Inc. $4,466,392 0.34% 113,389
Mega BNP PARIBAS ARBITRAGE, SA $4,449,100 0.34% 112,950
Mid SG Capital Management LLC $4,221,347 0.32% 107,168
Mega JPMORGAN CHASE & CO $4,039,953 0.31% 102,563
Large VOLORIDGE INVESTMENT MANAGEMENT, LLC $3,908,984 0.30% 99,238
Large STIFEL FINANCIAL CORP $3,690,566 0.28% 93,693
Mega RHUMBLINE ADVISERS $3,685,564 0.28% 93,566
Mega AMERICAN CENTURY COMPANIES INC $3,563,652 0.27% 90,471
Large Walleye Capital LLC $3,521,387 0.27% 89,398
Mega TWO SIGMA INVESTMENTS, LP $3,395,418 0.26% 86,200
Mega Legal & General Group Plc $3,278,664 0.25% 83,236
Mid FIRST NATIONAL BANK OF OMAHA Bank $3,164,080 0.24% 80,327
Large Thrivent Financial for Lutherans $2,945,977 0.23% 74,790
Large NEW YORK STATE COMMON RETIREMENT FUND Pension $2,872,121 0.22% 72,915
Mid Linden Thomas Advisory Services, LLC $2,854,672 0.22% 72,472
Small First National Advisers, LLC $2,845,809 0.22% 72,247
Mega Swiss National Bank Bank $2,773,056 0.21% 70,400
Mega CITADEL ADVISORS LLC $2,745,088 0.21% 69,690
Large HRT FINANCIAL LP $2,592,728 0.20% 65,822
Mega AMERIPRISE FINANCIAL INC $2,549,438 0.19% 64,723
Large Allianz Asset Management GmbH $2,389,003 0.18% 60,650
Mid Y-Intercept (Hong Kong) Ltd $2,337,048 0.18% 59,331
Small Bridge City Capital, LLC $2,308,647 0.18% 58,610
Mid Voleon Capital Management LP $2,082,470 0.16% 52,868
Large TEACHERS RETIREMENT SYSTEM OF THE STATE OF KENTUCKY Pension $2,046,782 0.16% 51,962
Mid Divisadero Street Capital Management, LP $2,000,972 0.15% 50,799
Mega UBS Group AG $1,999,749 0.15% 50,768
Large Vident Advisory, LLC $1,925,815 0.15% 48,891
Mega VICTORY CAPITAL MANAGEMENT INC $1,911,163 0.15% 48,519
Large CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Pension $1,910,257 0.15% 48,496
Large Gotham Asset Management, LLC $1,815,169 0.14% 46,082
Mid Vest Financial, LLC $1,788,424 0.14% 45,403
Mid SEIZERT CAPITAL PARTNERS, LLC $1,766,050 0.14% 44,835
Mega RAYMOND JAMES FINANCIAL INC $1,693,847 0.13% 43,002
Mid Engineers Gate Manager LP $1,622,158 0.12% 41,182
Mid Hennion & Walsh Asset Management, Inc. $1,495,126 0.11% 37,957
Mid HANTZ FINANCIAL SERVICES, INC. $1,487,011 0.11% 37,751
Mega ALLIANCEBERNSTEIN L.P. $1,482,718 0.11% 37,642
Large Creative Planning $1,457,823 0.11% 37,010
Small Laurus Global Equity Management Inc. $1,392,436 0.11% 35,350
Mid GSA CAPITAL PARTNERS LLP $1,307,314 0.10% 33,189
Mid WINTON GROUP Ltd $1,289,943 0.10% 32,748
Key facts CIK 69633 CUSIP 630402105 13F (30d) 3 filings 3 filers Visit website Investor relations

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