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Disclosery

NSSC NAPCO SEC TECHNOLOGIES INC

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Stock (common), issuer CIK 69633

248 managers (254 13F filers) reported a position in NSSC shares at 2025-12-31, 31,604,662 shares in all. 34 filers opened a position and 20 filers sold out during the quarter.

Managers
248
13F filers
254
New
34
Added
78
Reduced
98
Sold out
20
Shares held by filers
31,604,662

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q4 2025

Filers in the available 13F reports with a share position at 2025-12-31, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
BlackRock, Inc.in group BlackRock, Inc.3,224,505$134M<0.01%+340,62013F-HRTimelineGroup
VANGUARD GROUP INCin group VANGUARD GROUP INC2,882,063$120M<0.01%+31,64413F-HRTimelineGroup
Fundsmith LLP1,779,857$74.2M0.43%013F-HRTimeline
JANUS HENDERSON GROUP PLCin group Janus Henderson1,569,363$65.5M0.03%+45,09313F-HRTimelineGroup
Copeland Capital Management, LLC1,420,792$59.2M1.32%-76,72013F-HRTimeline
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC1,028,863$42.9M<0.01%+4,32413F-HRTimelineGroup
STATE STREET CORPin group STATE STREET CORP896,315$37.5M<0.01%+112,49513F-HRTimelineGroup
WELLINGTON MANAGEMENT GROUP LLPin group WELLINGTON MANAGEMENT GROUP L…879,298$36.7M0.01%-129,55913F-HRTimelineGroup
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPin group ARROWSTREET CAPITAL, LIMITED …864,022$36M0.02%+2,88113F-HRTimelineGroup
Divisadero Street Capital Management, LPin group Divisadero Street Capital Man…809,729$33.8M1.92%+698,16313F-HRTimelineGroup
FIRST TRUST ADVISORS LPin group FIRST TRUST ADVISORS LP714,382$29.8M0.02%+148,48813F-HRTimelineGroup
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP671,243$28M0.01%-6,84213F-HRTimelineGroup
Doma Perpetual Capital Management LLC627,931$26.2M7.36%-537,41613F-HRTimeline
NORTHERN TRUST CORPin group NORTHERN TRUST CORP597,918$24.9M<0.01%-42,39913F-HRTimelineGroup
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA580,557$24.2M<0.01%-65,70713F-HRTimelineGroup
MORGAN STANLEYin group MORGAN STANLEY423,516$17.7M<0.01%+42,92213F-HR/ATimelineGroup
JACOBS LEVY EQUITY MANAGEMENT, INC414,990$17.3M0.07%-23,33713F-HRTimeline
Qube Research & Technologies Ltd376,227$15.7M0.02%-44,58113F-HRTimeline
ENVESTNET ASSET MANAGEMENT INCin group ENVESTNET ASSET MANAGEMENT INC365,742$15.3M<0.01%-56,35513F-HRTimelineGroup
RENAISSANCE TECHNOLOGIES LLC333,200$13.9M0.02%+18,10013F-HRTimeline
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co314,842$13.1M<0.01%+8,35113F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/310,600$13M<0.01%+59,27413F-HRTimelineGroup
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC310,269$12.9M<0.01%+59,69513F-HR/ATimelineGroup
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC297,027$12.4M0.01%-34,47913F-HRTimelineGroup
Granite Investment Partners, LLC280,881$11.7M0.69%-16,82313F-HRTimeline
FEDERATED HERMES, INC.in group FEDERATED HERMES, INC.262,496$10.9M0.02%+85,07413F-HRTimelineGroup
Visionary Wealth Advisors262,462$10.9M0.49%+3,90313F-HRTimeline
Point72 Asset Management, L.P.in group Point72 Asset Management, L.P.257,840$10.8M0.02%+130,59913F-HRTimelineGroup
ADAGE CAPITAL PARTNERS GP, L.L.C.in group ADAGE CAPITAL PARTNERS GP, L.…243,510$10.2M0.02%+23,51013F-HRTimelineGroup
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS219,884$9.17M0.01%+13,37213F-HRTimelineGroup
WASATCH ADVISORS LP219,113$9.14M0.05%+2,00213F-HRTimeline
Bank of New York Mellon Corpin group Bank of New York Mellon Corp215,960$9.01M<0.01%+16,42413F-HRTimelineGroup
GAMCO Investors (Gabelli)group of 2 filers holding208,400$8.69M-9,600Timeline
UBS Group AGgroup of 2 filers holding201,226$8.39M-17,323Timeline
TUDOR INVESTMENT CORP ET AL200,489$8.36M0.05%+111,27713F-HRTimeline
ALTA CAPITAL MANAGEMENT LLC/199,666$8.33M0.55%-24,45213F-HRTimeline
VOLORIDGE INVESTMENT MANAGEMENT, LLC185,645$7.74M0.03%-12,04613F-HRTimeline
CAPTRUST FINANCIAL ADVISORS185,462$7.73M0.01%new13F-HRTimeline
CONGRESS ASSET MANAGEMENT CO181,393$7.56M0.05%+6,05513F-HRTimeline
CANADA PENSION PLAN INVESTMENT BOARD177,100$7.39M<0.01%+90013F-HRTimeline
KORNITZER CAPITAL MANAGEMENT INC /KS170,304$7.1M0.15%-3,27613F-HRTimeline
FIRST NATIONAL BANK OF OMAHAgroup of 2 filers holding163,690$6.83M-2,671Timeline
ALGERT GLOBAL LLC157,265$6.56M0.1%+22,03013F-HR/ATimeline
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…146,957$6.13M0.01%+5,61613F-HRTimelineGroup
RICE HALL JAMES & ASSOCIATES, LLC144,925$6.04M0.33%-11,44313F-HRTimeline
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC142,545$5.94M<0.01%-20,25013F-HRTimelineGroup
CenterBook Partners LP133,350$5.56M0.27%+3,28513F-HRTimeline
Trexquant Investment LP132,041$5.51M0.05%-49,65713F-HRTimeline
DANSKE BANK A/S130,235$5.43M0.01%-91013F-HRTimeline
Redmond Asset Management, LLC125,327$5.23M1.33%-2,26713F-HRTimeline
PDT Partners, LLC124,614$5.2M0.34%013F-HRTimeline
HighTower Advisors, LLC122,855$5.12M0.01%+1,03313F-HRTimeline
ISTHMUS PARTNERS, LLC121,917$5.08M0.56%-42813F-HRTimeline
Uniplan Investment Counsel, Inc.120,416$5.02M0.5%-31913F-HR/ATimeline
Man Group plcin group Man Group plc119,324$4.98M0.01%+28,05513F-HRTimelineGroup
CRAWFORD INVESTMENT COUNSEL INC117,680$4.91M0.08%+13,93013F-HRTimeline
Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen…115,756$4.83M0.01%-232,82013F-HR/ATimelineGroup
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC103,130$4.3M<0.01%+3,95313F-HRTimelineGroup
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\101,800$4.25M<0.01%-265,53113F-HRTimelineGroup
4D Advisors, LLC100,000$4.17M2.29%013F-HRTimeline
MARSHALL WACE, LLPin group MARSHALL WACE, LLP98,006$4.09M<0.01%+4,30813F-HRTimelineGroup
STIFEL FINANCIAL CORPin group STIFEL FINANCIAL CORP96,718$4.03M<0.01%-6,38013F-HRTimelineGroup
SEI INVESTMENTS COin group SEI INVESTMENTS CO94,514$3.94M<0.01%+5,55813F-HRTimelineGroup
HRT FINANCIAL LP88,795$3.7M0.01%+1,35413F-HRTimeline
Voleon Capital Management LP82,477$3.44M0.07%+52913F-HRTimeline
Allianz Asset Management GmbHin group Allianz SE80,150$3.34M<0.01%-8,36313F-HRTimelineGroup
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.75,362$3.14M<0.01%-88,53413F-HRTimelineGroup
SG Capital Management LLC74,221$3.1M0.34%new13F-HRTimeline
HANTZ FINANCIAL SERVICES, INC.74,106$3.09M0.05%-7,01413F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
Nuveen, LLCin group TIAA73,770$3.08M<0.01%-1,09613F-HRTimelineGroup
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC73,487$3.06M<0.01%-49,31113F-HRTimelineGroup
NEW YORK STATE COMMON RETIREMENT FUND72,915$3.04M<0.01%013F-HRTimeline
DEPRINCE RACE & ZOLLO INC72,024$3M0.06%+14,29313F-HRTimeline
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO70,437$2.94M<0.01%-186,96613F-HRTimelineGroup
Swiss National Bank70,400$2.94M<0.01%+90013F-HRTimeline
BARCLAYS PLCin group BARCLAYS PLC68,958$2.88M<0.01%+13,88013F-HRTimelineGroup
Engineers Gate Manager LP67,582$2.82M0.03%+1,56013F-HRTimeline
PRINCIPAL FINANCIAL GROUP INCgroup of 2 filers holding66,330$2.77M-783Timeline
Walleye Capital LLCgroup of 2 filers holding64,715$2.7MnewTimeline
Verition Fund Management LLC63,535$2.65M0.01%-18,30313F-HRTimeline
ACADIAN ASSET MANAGEMENT LLCin group ACADIAN ASSET MANAGEMENT LLC61,117$2.54M<0.01%+41,08313F-HRTimelineGroup
Bridge City Capital, LLC59,438$2.48M0.73%-8,38513F-HRTimeline
Jump Financial, LLCin group Jump Financial, LLC56,580$2.36M0.03%-33,82013F-HRTimelineGroup
Public Sector Pension Investment Board56,023$2.34M0.01%new13F-HRTimeline
TWO SIGMA INVESTMENTS, LPgroup of 2 filers holding54,300$2.26M+42,300Timeline
Thrivent Financial for Lutheransin group Thrivent Financial for Luther…50,985$2.13M<0.01%-1413F-HRTimelineGroup
Invesco Ltd.in group Invesco Ltd.49,109$2.05M<0.01%+6,79813F-HRTimelineGroup
RHUMBLINE ADVISERS44,740$1.87M<0.01%-6,36913F-HRTimeline
SEIZERT CAPITAL PARTNERS, LLC44,544$1.86M0.08%new13F-HRTimeline
Linden Thomas Advisory Services, LLC44,068$1.84M0.19%+1,43213F-HRTimeline
TEACHERS RETIREMENT SYSTEM OF THE STATE…43,112$1.8M0.01%013F-HRTimeline
SG Americas Securities, LLC42,566$1.77M<0.01%-47013F-HRTimeline
Laurus Global Equity Management Inc.42,540$1.77M1.44%-19,82013F-HRTimeline
Vest Financial, LLC41,805$1.74M0.02%+4,26813F-HRTimeline
ALLIANCEBERNSTEIN L.P.41,777$1.74M<0.01%+4,95113F-HRTimeline
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN41,199$1.72M<0.01%+16,98313F-HRTimelineGroup
VICTORY CAPITAL MANAGEMENT INC40,437$1.69M<0.01%new13F-HRTimeline
HEALTHCARE OF ONTARIO PENSION PLAN TRUS…38,793$1.62M<0.01%new13F-HRTimeline
Legal & General Group Plcin group Legal & General Group Plc37,970$1.58M<0.01%-5,96713F-HRTimelineGroup
IEQ CAPITAL, LLC37,857$1.58M<0.01%-9,99213F-HRTimeline
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC35,912$1.5M<0.01%new13F-HRTimelineGroup
CALIFORNIA STATE TEACHERS RETIREMENT SY…35,289$1.47M<0.01%+1,31313F-HRTimeline
Hennion & Walsh Asset Management, Inc.34,790$1.45M0.05%-73913F-HRTimeline
GSA CAPITAL PARTNERS LLP33,768$1.41M0.12%+28,23513F-HRTimeline
AlphaQuest LLC32,551$1.36M0.08%+10,25313F-HRTimeline
Creative Planningin group Creative Planning31,822$1.33M<0.01%+4,16813F-HRTimelineGroup
LPL Financial LLC31,124$1.3M<0.01%-11,32413F-HRTimeline
GW&K Investment Management, LLC30,358$1.27M0.01%013F-HRTimeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…29,323$1.22M<0.01%-10,04913F-HRTimelineGroup
HERITAGE INVESTORS MANAGEMENT CORP29,097$1.21M0.04%013F-HRTimeline
Y-Intercept (Hong Kong) Ltd27,815$1.16M0.03%-5,45313F-HRTimeline
PRICE T ROWE ASSOCIATES INC /MD/25,291$1.06M<0.01%+98513F-HRTimeline
RAFFLES ASSOCIATES LP24,424$1.02M0.76%013F-HRTimeline
Corient Private Wealth LPgroup of 2 filers holding23,587$984K-1,668Timeline
HSBC HOLDINGS PLCin group HSBC HOLDINGS PLC23,266$981K<0.01%new13F-HR/ATimelineGroup
Campbell & CO Investment Adviser LLC23,385$975K0.05%new13F-HRTimeline
NORGES BANK22,935$956K<0.01%new13F-HRTimeline
Cetera Investment Advisers22,845$953K<0.01%+1,88213F-HRTimeline
FRANKLIN RESOURCES INCin group Franklin Resources22,642$944K<0.01%-26113F-HRTimelineGroup
Cambridge Investment Research Advisors,…21,345$890K<0.01%-32413F-HRTimeline
Quantbot Technologies LP20,633$860K0.03%-13,11813F-HRTimeline
Gotham Asset Management, LLC20,496$855K<0.01%-4813F-HRTimeline
Balyasny Asset Management L.P.in group Balyasny Asset Management20,097$838K<0.01%new13F-HRTimelineGroup
MetLife Investment Management, LLCin group MetLife Investment Management…19,361$807K<0.01%-1,11713F-HRTimelineGroup
Quantinno Capital Management LP18,868$787K<0.01%+2,68213F-HRTimeline
KLP KAPITALFORVALTNING AS18,400$769K<0.01%+9,10013F-HRTimeline
STRS OHIO18,300$763K<0.01%+8,80013F-HRTimeline
LOS ANGELES CAPITAL MANAGEMENT LLC17,150$751K<0.01%013F-HRTimeline
CWM, LLCin group CWM, LLC17,870$745K<0.01%-1,49513F-HRTimelineGroup
TRUIST FINANCIAL CORPin group TRUIST FINANCIAL CORP17,552$732K<0.01%-1,34913F-HRTimelineGroup
TEACHER RETIREMENT SYSTEM OF TEXAS17,375$725K<0.01%+3,40313F-HRTimeline
Cerity Partners LLCin group Cerity Partners LLC17,195$717K<0.01%-2,62013F-HRTimelineGroup
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…15,995$667K<0.01%-5213F-HRTimelineGroup
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …15,934$664K<0.01%-1,24413F-HRTimelineGroup
INTECH INVESTMENT MANAGEMENT LLC15,600$651K0.01%013F-HRTimeline
Magnetar Financial LLCin group Magnetar Financial LLC14,894$621K0.01%new13F-HRTimelineGroup
NEUBERGER BERMAN GROUP LLCin group NEUBERGER BERMAN GROUP LLC14,804$617K<0.01%-91613F-HRTimelineGroup
BESSEMER GROUP INCin group BESSEMER GROUP INC14,731$615K<0.01%+5613F-HRTimelineGroup
Snowden Capital Advisors LLC13,987$585K0.02%-1,53513F-HRTimeline
LAZARD ASSET MANAGEMENT LLCin group LAZARD ASSET MANAGEMENT LLC13,471$562K<0.01%+4613F-HRTimelineGroup
Pathstone Holdings, LLCin group Pathstone Holdings, LLC13,373$558K<0.01%-14,69713F-HRTimelineGroup
Brevan Howard Capital Management LPin group Brevan Howard Capital Managem…13,344$556K0.01%-7,65913F-HRTimelineGroup
VIRGINIA RETIREMENT SYSTEMS ET Al13,048$544K<0.01%+4,20013F-HRTimeline
Versor Investments LP13,027$543K0.08%new13F-HRTimeline
CIM, LLC12,613$526K0.07%-55113F-HRTimeline
POLEN CAPITAL MANAGEMENT LLC12,567$524K<0.01%013F-HRTimeline
SENTINEL PENSION ADVISORS, LLC12,546$523K0.08%-3,50013F-HRTimeline
STATE BOARD OF ADMINISTRATION OF FLORID…12,484$521K<0.01%+3,39413F-HRTimeline
WEALTH ENHANCEMENT ADVISORY SERVICES, L…11,981$505K<0.01%-13213F-HRTimeline
State of Wyoming11,842$494K0.05%+10,88413F-HRTimeline
AVIVA PLCin group AVIVA PLC11,827$493K<0.01%+213F-HRTimelineGroup
Brooklyn Investment Group11,391$479K0.02%new13F-HRTimeline
MANGROVE PARTNERS IM, LLC11,471$478K0.04%new13F-HRTimeline
MCMORGAN & CO LLC11,351$473K0.08%-71,20013F-HRTimeline
ALPS ADVISORS INCin group ALPS ADVISORS INC10,991$458K<0.01%+12113F-HRTimelineGroup
Tributary Capital Management, LLC10,548$440K0.04%-20013F-HRTimeline
Numerai GP LLC10,383$433K0.05%-2,68813F-HRTimeline
ARIZONA STATE RETIREMENT SYSTEM9,944$415K<0.01%-59213F-HRTimeline
Yorktown Management & Research Co Inc9,900$413K0.33%013F-HRTimeline
EARNEST PARTNERS LLC9,600$400K<0.01%013F-HRTimeline
SkyOak Wealth, LLC8,962$374K0.07%-42513F-HRTimeline
Police & Firemen's Retirement System of…8,922$372K<0.01%-81913F-HRTimeline
Aquatic Capital Management LLC8,521$355K0.01%new13F-HRTimeline
Legato Capital Management LLC8,117$338K0.03%-7,64713F-HRTimeline
Zurcher Kantonalbank (Zurich Cantonalba…7,908$330K<0.01%+1,68613F-HRTimeline
PERSONAL CFO SOLUTIONS, LLC7,632$318K0.05%-39913F-HRTimeline
COMERICA BANK7,626$318K<0.01%-57313F-HRTimeline
Jacobs Equity LLC7,458$311K0.3%13F-HRTimeline
State of Tennessee, Department of Treas…7,620$281K<0.01%new13F-HRTimeline
State of Alaska, Department of Revenue6,687$277K<0.01%+5,10513F-HRTimeline
ProShare Advisors LLC6,313$263K<0.01%+40713F-HRTimeline
Dynamic Technology Lab Private Ltd6,283$262K0.06%new13F-HRTimeline
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC6,240$260K<0.01%-11913F-HRTimelineGroup
BARRETT & COMPANY, INC.6,017$251K0.08%+413F-HRTimeline
Jefferies Financial Group Inc.in group Jefferies Financial Group Inc.5,982$249K<0.01%new13F-HRTimelineGroup
STEEL GROVE CAPITAL ADVISORS, LLC5,871$245K0.03%new13F-HRTimeline
MERCER GLOBAL ADVISORS INC /ADV5,845$244K<0.01%-32113F-HRTimeline
Universal- Beteiligungs- und Serviceges…in group Universal- Beteiligungs- und …5,799$242K<0.01%013F-HRTimelineGroup
MML INVESTORS SERVICES, LLC5,237$218K<0.01%+7113F-HRTimeline
NLB Skladi, upravljanje premozenja, d.o…5,200$217K0.01%13F-HRTimeline
Jain Global LLC5,160$215K<0.01%-1,00013F-HRTimeline
Tidal Investments LLCin group Tidal Investments LLC5,105$213K<0.01%new13F-HRTimelineGroup
DekaBank Deutsche Girozentrale4,553$206K<0.01%013F-HRTimeline
Pictet Asset Management Holding SAin group Pictet Asset Management Holdi…4,923$205K<0.01%013F-HRTimelineGroup
Integrated Quantitative Investments LLC4,837$202K0.04%new13F-HRTimeline
Kestra Advisory Services, LLCin group Kestra Advisory Services, LLC4,542$189K<0.01%-92213F-HRTimelineGroup
FMR LLCin group FMR LLC4,484$187K<0.01%-93,43013F-HRTimelineGroup
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…4,225$176K<0.01%-78713F-HRTimelineGroup
PUBLIC EMPLOYEES RETIREMENT ASSOCIATION…3,551$148K<0.01%013F-HRTimeline
Global Retirement Partners, LLC3,475$145K<0.01%new13F-HRTimeline
SIMPLEX TRADING, LLC3,376$141K<0.01%-1,33413F-HRTimeline
CANADA LIFE ASSURANCE Coin group CANADA LIFE ASSURANCE Co3,364$140K<0.01%-13,47813F-HRTimelineGroup
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…2,885$120K<0.01%013F-HRTimelineGroup
CITIGROUP INCin group CITIGROUP INC2,859$119K<0.01%-2,66213F-HRTimelineGroup
Kemnay Advisory Services Inc.2,563$107K0.02%new13F-HRTimeline
Arax Advisory Partners1,464$61.1K<0.01%-14,51113F-HRTimeline
Essential Partners LLC1,260$52.5K0.02%-9613F-HRTimeline
Farther Finance Advisors, LLC1,256$52.4K<0.01%-28513F-HRTimeline
Versant Capital Management, Inc1,145$47.7K0.01%013F-HRTimeline
AMALGAMATED BANK1,085$45K<0.01%-9513F-HRTimeline