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Equibles

NSSC

Napco Security Technologies, Inc

Company with tickers: NSSC

CIK
69633
CUSIP
630402105
Shares Outstanding
35,727,337
13F Activity (30d)
101 filings 98 filers

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: 249
Total Value: $922,825,599
Total Shares: 23,427,920
Showing 1–100 of 249 holdings by value · page 1 of 3

Institutional Ownership Trend

25 quarters

Superinvestors Holding NSSC

All superinvestors →
Terry Smith $15,109,846 Joel Greenblatt $1,815,169

Holder Concentration

Across 249 13F filers · Δ vs Dec 31, 2025
Top Holder
8.6%
Jun 2023 → Mar 2026 · range 7.2% – 10.4%
−1.8 pts
Top 5
32.1%
Jun 2023 → Mar 2026 · range 27.7% – 34.9%
−2.8 pts
Top 10
47.0%
Jun 2023 → Mar 2026 · range 41.7% – 50.8%
−3.8 pts
HHI
307
Jun 2023 → Mar 2026 · range 262 – 356
Broadly held−48

Quarterly Activity

vs Dec 31, 2025
New
66
Increased
76
Decreased
79
Sold Out
36
Unchanged
28
Holder count: +30
Institutional value: +28.8%
Shares held: +36.4%

Top Buyers

vs Dec 31, 2025
Institution Added Now Holds Open
Mid Copeland Capital Management, LLC +588,297 2,009,089
Mega STATE STREET CORP +535,188 1,431,503
Large BESSEMER GROUP INC +278,136 292,867
Mega PRINCIPAL FINANCIAL GROUP INC +158,984 225,314
Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC +140,944 272,027

Top Sellers

vs Dec 31, 2025
Institution Sold Now Holds Open
Large Fundsmith LLP −1,396,261 383,596
Large Qube Research & Technologies Ltd −209,588 166,639
Mega BNP PARIBAS ARBITRAGE, SA −106,934 112,950
Large MARSHALL WACE, LLP −87,167 10,839
Large VOLORIDGE INVESTMENT MANAGEMENT, LLC −86,407 99,238

Top New Positions

vs Dec 31, 2025
Institution Acquired Value (USD) Open
Mega VANGUARD CAPITAL MANAGEMENT LLC 1,505,177 $59,288,922
Mega VANGUARD PORTFOLIO MANAGEMENT LLC 1,464,212 $57,675,310
Large PRUDENTIAL FINANCIAL INC 750,030 $29,543,681
Large Point72 Asset Management, L.P. 482,272 $18,996,694
Mega ROYAL BANK OF CANADA 476,558 $18,771,616

Top Sold-Out Positions

vs Dec 31, 2025
Institution Previously Held Last Value (USD) Open
Large ADAGE CAPITAL PARTNERS GP, L.L.C. 243,510 $10,154,367
Large TUDOR INVESTMENT CORP ET AL 200,489 $8,360,391
Mid GAMCO INVESTORS, INC. ET AL 188,400 $7,856,280
Mid KORNITZER CAPITAL MANAGEMENT INC /KS 170,304 $7,101,676
Large DANSKE BANK A/S 130,235 $5,430,798
Filter: New 66 Increased 76 Reduced 79 Sold out 36 Unchanged 28
Showing 100 of 249
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Open
Mid Copeland Capital Management, LLC $79,138,015 8.58% 2,009,089
Mega VANGUARD CAPITAL MANAGEMENT LLC $59,288,922 6.42% 1,505,177
Mega VANGUARD PORTFOLIO MANAGEMENT LLC $57,675,310 6.25% 1,464,212
Mega STATE STREET CORP $56,386,903 6.11% 1,431,503
Mega GEODE CAPITAL MANAGEMENT, LLC $43,647,743 4.73% 1,108,092
Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP $33,325,515 3.61% 846,040
Large PRUDENTIAL FINANCIAL INC $29,543,681 3.20% 750,030
Mega FIRST TRUST ADVISORS LP $26,989,594 2.92% 685,189
Small Doma Perpetual Capital Management LLC $24,734,202 2.68% 627,931
Mega NORTHERN TRUST CORP Bank $23,016,638 2.49% 584,327
Large Point72 Asset Management, L.P. $18,996,694 2.06% 482,272
Mega ROYAL BANK OF CANADA Bank $18,771,616 2.03% 476,558
Large RENAISSANCE TECHNOLOGIES LLC $17,205,552 1.86% 436,800
Large JACOBS LEVY EQUITY MANAGEMENT, INC $16,259,719 1.76% 412,788
Mega GOLDMAN SACHS GROUP INC $15,885,750 1.72% 403,294
Large Fundsmith LLP $15,109,846 1.64% 383,596
Mega ENVESTNET ASSET MANAGEMENT INC $14,796,380 1.60% 375,638
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $13,335,878 1.45% 338,560
Large BESSEMER GROUP INC $11,536,026 1.25% 292,867
Large CAPTRUST FINANCIAL ADVISORS $10,809,364 1.17% 274,419
Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC $10,715,141 1.16% 272,027
Mid Granite Investment Partners, LLC $10,537,849 1.14% 267,526
Small Visionary Wealth Advisors $10,335,975 1.12% 262,401
Large CONGRESS ASSET MANAGEMENT CO $9,942,114 1.08% 252,402
Mega VANGUARD FIDUCIARY TRUST CO Bank $9,715,188 1.05% 246,641
Mid ALGERT GLOBAL LLC $9,499,134 1.03% 241,156
Mega PRINCIPAL FINANCIAL GROUP INC $8,875,118 0.96% 225,314
Large Russell Investments Group, Ltd. $8,421,062 0.91% 213,787
Large Man Group plc $8,257,325 0.89% 209,630
Mega Nuveen, LLC $7,843,690 0.85% 199,129
Large Trexquant Investment LP $6,741,125 0.73% 171,138
Large Qube Research & Technologies Ltd $6,563,910 0.71% 166,639
Mega CANADA PENSION PLAN INVESTMENT BOARD Pension $6,396,936 0.69% 162,400
Mid RICE HALL JAMES & ASSOCIATES, LLC $5,781,388 0.63% 146,773
Mid CRAWFORD INVESTMENT COUNSEL INC $5,486,554 0.59% 139,288
Mid CenterBook Partners LP $5,217,875 0.57% 132,467
Large SEI INVESTMENTS CO $5,176,554 0.56% 131,418
Large Public Sector Pension Investment Board Pension $5,024,352 0.54% 127,554
Large LOS ANGELES CAPITAL MANAGEMENT LLC $4,783,994 0.52% 121,452
Mid ALTA CAPITAL MANAGEMENT LLC/ $4,747,676 0.51% 120,530
Large Rockefeller Capital Management L.P. $4,679,254 0.51% 118,793
Mid DEPRINCE RACE & ZOLLO INC $4,678,074 0.51% 118,763
Small Redmond Asset Management, LLC $4,676,144 0.51% 118,714
Large HighTower Advisors, LLC $4,653,101 0.50% 118,129
Mid PDT Partners, LLC $4,619,659 0.50% 117,280
Small ISTHMUS PARTNERS, LLC $4,556,201 0.49% 115,669
Small Uniplan Investment Counsel, Inc. $4,466,392 0.48% 113,389
Mega BNP PARIBAS ARBITRAGE, SA $4,449,100 0.48% 112,950
Mid SG Capital Management LLC $4,221,347 0.46% 107,168
Mega JPMORGAN CHASE & CO $4,039,953 0.44% 102,563
Large VOLORIDGE INVESTMENT MANAGEMENT, LLC $3,908,984 0.42% 99,238
Large STIFEL FINANCIAL CORP $3,690,566 0.40% 93,693
Mega RHUMBLINE ADVISERS $3,685,564 0.40% 93,566
Mega AMERICAN CENTURY COMPANIES INC $3,563,652 0.39% 90,471
Large Walleye Capital LLC $3,521,387 0.38% 89,398
Mega TWO SIGMA INVESTMENTS, LP $3,395,418 0.37% 86,200
Mega Legal & General Group Plc $3,278,664 0.36% 83,236
Mid FIRST NATIONAL BANK OF OMAHA Bank $3,164,080 0.34% 80,327
Large NEW YORK STATE COMMON RETIREMENT FUND Pension $2,872,121 0.31% 72,915
Mid Linden Thomas Advisory Services, LLC $2,854,672 0.31% 72,472
Small First National Advisers, LLC $2,845,809 0.31% 72,247
Mega Swiss National Bank Bank $2,773,056 0.30% 70,400
Mega CITADEL ADVISORS LLC $2,745,088 0.30% 69,690
Large HRT FINANCIAL LP $2,592,728 0.28% 65,822
Large Allianz Asset Management GmbH $2,389,003 0.26% 60,650
Mid Y-Intercept (Hong Kong) Ltd $2,337,048 0.25% 59,331
Small Bridge City Capital, LLC $2,308,647 0.25% 58,610
Mid Voleon Capital Management LP $2,082,470 0.23% 52,868
Large TEACHERS RETIREMENT SYSTEM OF THE STATE OF KENTUCKY Pension $2,046,782 0.22% 51,962
Mid Divisadero Street Capital Management, LP $2,000,972 0.22% 50,799
Mega UBS Group AG $1,999,749 0.22% 50,768
Large Vident Advisory, LLC $1,925,815 0.21% 48,891
Mega VICTORY CAPITAL MANAGEMENT INC $1,911,163 0.21% 48,519
Large CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Pension $1,910,257 0.21% 48,496
Large Gotham Asset Management, LLC $1,815,169 0.20% 46,082
Mid Vest Financial, LLC $1,788,424 0.19% 45,403
Mid SEIZERT CAPITAL PARTNERS, LLC $1,766,050 0.19% 44,835
Mega RAYMOND JAMES FINANCIAL INC $1,693,847 0.18% 43,002
Mid Engineers Gate Manager LP $1,622,158 0.18% 41,182
Mid Hennion & Walsh Asset Management, Inc. $1,495,126 0.16% 37,957
Mid HANTZ FINANCIAL SERVICES, INC. $1,487,011 0.16% 37,751
Mega ALLIANCEBERNSTEIN L.P. $1,482,718 0.16% 37,642
Large Creative Planning $1,457,823 0.16% 37,010
Small Laurus Global Equity Management Inc. $1,392,436 0.15% 35,350
Mid GSA CAPITAL PARTNERS LLP $1,307,314 0.14% 33,189
Mid WINTON GROUP Ltd $1,289,943 0.14% 32,748
Large HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND Pension $1,268,870 0.14% 32,213
Large STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM Pension $1,265,561 0.14% 32,129
Mega DEUTSCHE BANK AG\ Bank $1,239,799 0.13% 31,475
Large CANADA LIFE ASSURANCE Co Insurance $1,169,292 0.13% 29,685
Large IEQ CAPITAL, LLC $1,154,639 0.13% 29,313
Mid HERITAGE INVESTORS MANAGEMENT CORP $1,146,130 0.12% 29,097
Mega LPL Financial LLC $1,130,493 0.12% 28,700
Large Balyasny Asset Management L.P. $1,102,289 0.12% 27,984
Small Integrated Quantitative Investments LLC $1,080,231 0.12% 27,424
Large Zurcher Kantonalbank (Zurich Cantonalbank) Bank $1,076,765 0.12% 27,336
Large GW&K Investment Management, LLC $1,048,286 0.11% 26,613
Small TWINBEECH CAPITAL LP $1,028,079 0.11% 26,100
Mega VANGUARD ASSET MANAGEMENT, Ltd $984,710 0.11% 24,999
Micro RAFFLES ASSOCIATES LP $962,061 0.10% 24,424

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