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Disclosery

NSSC NAPCO SEC TECHNOLOGIES INC

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Stock (common), issuer CIK 69633

262 managers (271 13F filers) reported a position in NSSC shares at 2026-03-31, 34,675,818 shares in all. 45 filers opened a position and 30 filers sold out during the quarter.

Managers
262
13F filers
271
New
45
Added
96
Reduced
95
Sold out
30
Shares held by filers
34,675,818

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, Q1 2026

Filers in the available 13F reports with a share position at 2026-03-31, 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.5,681,770$224M<0.01%+2,457,26513F-HRTimelineGroup
VANGUARD GROUP INCgroup of 6 filers holding3,266,646$129MnewTimeline
Copeland Capital Management, LLC2,009,089$79.1M1.76%+588,29713F-HRTimeline
STATE STREET CORPin group STATE STREET CORP1,431,503$56.5M<0.01%+535,18813F-HRTimelineGroup
JANUS HENDERSON GROUP PLCin group Janus Henderson1,424,963$56.1M0.03%-144,40013F-HR/ATimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC1,108,092$43.7M<0.01%+79,22913F-HRTimelineGroup
WELLINGTON MANAGEMENT GROUP LLPin group WELLINGTON MANAGEMENT GROUP L…929,599$36.6M0.01%+50,30113F-HRTimelineGroup
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPin group ARROWSTREET CAPITAL, LIMITED …846,040$33.3M0.02%-17,98213F-HRTimelineGroup
PRUDENTIAL FINANCIAL INCin group PRUDENTIAL FINANCIAL INC750,030$29.5M0.04%new13F-HRTimelineGroup
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP702,852$27.7M0.01%+31,60913F-HRTimelineGroup
FIRST TRUST ADVISORS LPin group FIRST TRUST ADVISORS LP685,189$27M0.02%-29,19313F-HRTimelineGroup
Doma Perpetual Capital Management LLC627,931$24.7M6.64%013F-HRTimeline
NORTHERN TRUST CORPin group NORTHERN TRUST CORP584,327$23M<0.01%-13,59113F-HRTimelineGroup
Point72 Asset Management, L.P.in group Point72 Asset Management, L.P.482,272$19M0.03%+224,43213F-HRTimelineGroup
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA476,558$18.8M<0.01%-103,99913F-HRTimelineGroup
MORGAN STANLEYin group MORGAN STANLEY464,861$18.3M<0.01%+41,34513F-HRTimelineGroup
RENAISSANCE TECHNOLOGIES LLC436,800$17.2M0.03%+103,60013F-HRTimeline
JACOBS LEVY EQUITY MANAGEMENT, INC412,788$16.3M0.07%-2,20213F-HRTimeline
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC403,294$15.9M<0.01%+93,02513F-HRTimelineGroup
Fundsmith LLP383,596$15.1M0.12%-1,396,26113F-HRTimeline
ENVESTNET ASSET MANAGEMENT INCin group ENVESTNET ASSET MANAGEMENT INC375,638$14.8M<0.01%+9,89613F-HRTimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co338,560$13.3M<0.01%+23,71813F-HRTimelineGroup
UBS Group AGgroup of 2 filers holding322,795$12.7M+121,569Timeline
Bank of New York Mellon Corpin group Bank of New York Mellon Corp302,967$11.9M<0.01%+87,00713F-HRTimelineGroup
BESSEMER GROUP INCin group BESSEMER GROUP INC292,867$11.5M0.02%+278,13613F-HRTimelineGroup
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC285,028$11.2M0.01%-11,99913F-HRTimelineGroup
CAPTRUST FINANCIAL ADVISORS274,419$10.8M0.02%+88,95713F-HRTimeline
FEDERATED HERMES, INC.in group FEDERATED HERMES, INC.269,642$10.6M0.02%+7,14613F-HRTimelineGroup
Granite Investment Partners, LLC267,526$10.5M0.65%-13,35513F-HRTimeline
Visionary Wealth Advisors262,401$10.3M0.46%-6113F-HRTimeline
CONGRESS ASSET MANAGEMENT CO252,402$9.94M0.07%+71,00913F-HRTimeline
WASATCH ADVISORS LP242,585$9.56M0.06%+23,47213F-HRTimeline
ALGERT GLOBAL LLC241,156$9.5M0.14%+83,89113F-HR/ATimeline
PRINCIPAL FINANCIAL GROUP INCin group PRINCIPAL FINANCIAL GROUP INC225,314$8.88M<0.01%+158,98413F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/221,765$8.74M<0.01%-88,83513F-HRTimelineGroup
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…213,787$8.42M0.01%+66,83013F-HRTimelineGroup
Man Group plcin group Man Group plc209,630$8.26M0.02%+90,30613F-HRTimelineGroup
Nuveen, LLCin group TIAA199,129$7.84M<0.01%+125,35913F-HRTimelineGroup
GAMCO Investors (Gabelli)group of 2 filers holding197,300$7.77M-11,100Timeline
Trexquant Investment LP171,138$6.74M0.05%+39,09713F-HRTimeline
KORNITZER CAPITAL MANAGEMENT INC /KS169,353$6.67M0.14%-95113F-HRTimeline
Qube Research & Technologies Ltd166,639$6.56M0.01%-209,58813F-HRTimeline
CANADA PENSION PLAN INVESTMENT BOARD162,400$6.4M<0.01%-14,70013F-HRTimeline
FIRST NATIONAL BANK OF OMAHAgroup of 2 filers holding152,574$6.01M-11,116Timeline
RICE HALL JAMES & ASSOCIATES, LLC146,773$5.78M0.32%+1,84813F-HRTimeline
CRAWFORD INVESTMENT COUNSEL INC139,288$5.49M0.09%+21,60813F-HRTimeline
CenterBook Partners LP132,467$5.22M0.28%-88313F-HRTimeline
SEI INVESTMENTS COin group SEI INVESTMENTS CO131,418$5.18M<0.01%+36,90413F-HRTimelineGroup
Public Sector Pension Investment Board127,554$5.02M0.02%+71,53113F-HRTimeline
Invesco Ltd.in group Invesco Ltd.124,389$4.9M<0.01%+75,28013F-HRTimelineGroup
LOS ANGELES CAPITAL MANAGEMENT LLC121,452$4.78M0.02%+104,30213F-HRTimeline
ALTA CAPITAL MANAGEMENT LLC/120,530$4.75M0.37%-79,13613F-HRTimeline
Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen…118,793$4.7M0.01%+3,03713F-HRTimelineGroup
DEPRINCE RACE & ZOLLO INC118,763$4.68M0.09%+46,73913F-HRTimeline
Redmond Asset Management, LLC118,714$4.68M1.28%-6,61313F-HRTimeline
HighTower Advisors, LLC118,129$4.65M<0.01%-4,72613F-HRTimeline
PDT Partners, LLC117,280$4.62M0.27%-7,33413F-HRTimeline
ISTHMUS PARTNERS, LLC115,669$4.56M0.48%-6,24813F-HRTimeline
Uniplan Investment Counsel, Inc.113,389$4.47M0.46%-7,02713F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS112,950$4.45M<0.01%-106,93413F-HRTimelineGroup
SG Capital Management LLC107,168$4.22M0.35%+32,94713F-HRTimeline
VOLORIDGE INVESTMENT MANAGEMENT, LLC99,238$3.91M0.02%-86,40713F-HRTimeline
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO102,563$3.89M<0.01%+32,12613F-HR/ATimelineGroup
STIFEL FINANCIAL CORPin group STIFEL FINANCIAL CORP93,693$3.69M<0.01%-3,02513F-HRTimelineGroup
RHUMBLINE ADVISERS93,566$3.69M<0.01%+48,82613F-HRTimeline
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC90,471$3.56M<0.01%-12,65913F-HRTimelineGroup
Walleye Capital LLCgroup of 2 filers holding89,398$3.52M+24,683Timeline
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP86,200$3.4M<0.01%+59,60013F-HRTimelineGroup
Legal & General Group Plcin group Legal & General Group Plc83,236$3.28M<0.01%+45,26613F-HRTimelineGroup
Thrivent Financial for Lutheransin group Thrivent Financial for Luther…74,790$2.95M0.01%+23,80513F-HRTimelineGroup
NEW YORK STATE COMMON RETIREMENT FUND72,915$2.87M<0.01%013F-HRTimeline
Linden Thomas Advisory Services, LLC72,472$2.85M0.28%+28,40413F-HRTimeline
Swiss National Bank70,400$2.77M<0.01%013F-HRTimeline
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC69,690$2.75M<0.01%-72,85513F-HRTimelineGroup
HRT FINANCIAL LP65,822$2.59M0.01%-22,97313F-HRTimeline
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC64,723$2.55M<0.01%new13F-HR/ATimelineGroup
Allianz Asset Management GmbHin group Allianz SE60,650$2.39M<0.01%-19,50013F-HRTimelineGroup
Y-Intercept (Hong Kong) Ltd59,331$2.34M0.04%+31,51613F-HRTimeline
Bridge City Capital, LLC58,610$2.31M0.64%-82813F-HRTimeline
Voleon Capital Management LP52,868$2.08M0.04%-29,60913F-HRTimeline
TEACHERS RETIREMENT SYSTEM OF THE STATE…51,962$2.05M0.02%+8,85013F-HRTimeline
Divisadero Street Capital Management, LPin group Divisadero Street Capital Man…50,799$2M0.09%-758,93013F-HRTimelineGroup
Vident Advisory, LLCin group Vident Advisory, LLC48,891$1.93M0.02%new13F-HRTimelineGroup
VICTORY CAPITAL MANAGEMENT INC48,519$1.91M<0.01%+8,08213F-HRTimeline
CALIFORNIA STATE TEACHERS RETIREMENT SY…48,496$1.91M<0.01%+13,20713F-HRTimeline
Gotham Asset Management, LLC46,082$1.82M0.01%+25,58613F-HRTimeline
Vest Financial, LLC45,403$1.79M0.02%+3,59813F-HRTimeline
SEIZERT CAPITAL PARTNERS, LLC44,835$1.77M0.08%+29113F-HRTimeline
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC43,002$1.69M<0.01%new13F-HRTimelineGroup
Engineers Gate Manager LP41,182$1.62M0.02%-26,40013F-HRTimeline
ALLIANCEBERNSTEIN L.P.37,642$1.57M<0.01%-4,13513F-HRTimeline
Hennion & Walsh Asset Management, Inc.37,957$1.5M0.05%+3,16713F-HRTimeline
HANTZ FINANCIAL SERVICES, INC.37,751$1.49M0.02%-36,35513F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
Creative Planningin group Creative Planning37,010$1.46M<0.01%+5,18813F-HRTimelineGroup
Laurus Global Equity Management Inc.35,350$1.39M1.36%-7,19013F-HRTimeline
GSA CAPITAL PARTNERS LLP33,189$1.31M0.08%-57913F-HRTimeline
WINTON GROUP Ltdin group WINTON GROUP Ltd32,748$1.29M0.05%new13F-HRTimelineGroup
HEALTHCARE OF ONTARIO PENSION PLAN TRUS…32,213$1.27M<0.01%-6,58013F-HRTimeline
STATE BOARD OF ADMINISTRATION OF FLORID…32,129$1.27M<0.01%+19,64513F-HRTimeline
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\31,475$1.24M<0.01%-70,32513F-HRTimelineGroup
PRICE T ROWE ASSOCIATES INC /MD/31,036$1.22M<0.01%+5,74513F-HRTimeline
CANADA LIFE ASSURANCE Coin group CANADA LIFE ASSURANCE Co29,685$1.17M<0.01%+26,32113F-HRTimelineGroup
IEQ CAPITAL, LLC29,313$1.15M0.01%-8,54413F-HRTimeline
HERITAGE INVESTORS MANAGEMENT CORP29,097$1.15M0.03%013F-HRTimeline
LPL Financial LLC28,700$1.13M<0.01%-2,42413F-HRTimeline
Balyasny Asset Management L.P.in group Balyasny Asset Management27,984$1.1M<0.01%+7,88713F-HRTimelineGroup
Integrated Quantitative Investments LLC27,424$1.08M0.2%+22,58713F-HRTimeline
Zurcher Kantonalbank (Zurich Cantonalba…27,336$1.08M<0.01%+19,42813F-HRTimeline
GW&K Investment Management, LLC26,613$1.05M0.01%-3,74513F-HRTimeline
TWINBEECH CAPITAL LP26,100$1.03M0.11%new13F-HRTimeline
RAFFLES ASSOCIATES LP24,424$962K0.83%013F-HRTimeline
State of Alaska, Department of Revenue24,288$956K0.01%+17,60113F-HRTimeline
SG Americas Securities, LLC24,220$954K<0.01%-18,34613F-HRTimeline
TEACHER RETIREMENT SYSTEM OF TEXAS23,989$945K<0.01%+6,61413F-HRTimeline
State of Tennessee, Department of Treas…23,544$927K<0.01%+15,92413F-HRTimeline
Magnetar Financial LLCin group Magnetar Financial LLC22,692$894K0.01%+7,79813F-HRTimelineGroup
FRANKLIN RESOURCES INCin group Franklin Resources21,631$852K<0.01%-1,01113F-HRTimelineGroup
Cetera Investment Advisers21,559$849K<0.01%-1,28613F-HRTimeline
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN21,458$845K<0.01%-19,74113F-HR/ATimelineGroup
Cambridge Investment Research Advisors,…21,341$841K<0.01%-413F-HRTimeline
HSBC HOLDINGS PLCin group HSBC HOLDINGS PLC21,068$825K<0.01%-2,19813F-HRTimelineGroup
MetLife Investment Management, LLCin group MetLife Investment Management…19,569$771K<0.01%+20813F-HRTimelineGroup
Quantinno Capital Management LP19,464$767K<0.01%+59613F-HRTimeline
Corient Private Wealth LPgroup of 2 filers holding19,460$767K-4,127Timeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…19,318$761K<0.01%-10,00513F-HRTimelineGroup
Ellsworth Advisors, LLC18,774$740K0.14%new13F-HRTimeline
Jefferies Financial Group Inc.in group Jefferies Financial Group Inc.18,558$731K0.01%+12,57613F-HRTimelineGroup
KLP KAPITALFORVALTNING AS18,400$727K<0.01%013F-HRTimeline
HARBOR CAPITAL ADVISORS, INC.17,814$702K0.06%new13F-HRTimeline
STRS OHIO17,800$701K<0.01%-50013F-HRTimeline
Cerity Partners LLCin group Cerity Partners LLC17,416$686K<0.01%+22113F-HRTimelineGroup
WEALTH ENHANCEMENT ADVISORY SERVICES, L…17,099$682K<0.01%+5,11813F-HRTimeline
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…16,181$637K<0.01%+18613F-HRTimelineGroup
FIFTH THIRD BANCORPin group FIFTH THIRD BANK, NATIONAL AS…15,901$626K<0.01%new13F-HRTimelineGroup
Louisiana State Employees Retirement Sy…15,800$622K0.01%new13F-HRTimeline
VIRGINIA RETIREMENT SYSTEMS ET Al15,748$620K<0.01%+2,70013F-HRTimeline
CWM, LLCin group CWM, LLC15,683$618K<0.01%-2,18713F-HRTimelineGroup
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …15,562$613K<0.01%-37213F-HRTimelineGroup
TRUIST FINANCIAL CORPin group TRUIST FINANCIAL CORP15,357$605K<0.01%-2,19513F-HRTimelineGroup
NEUBERGER BERMAN GROUP LLCin group NEUBERGER BERMAN GROUP LLC15,164$597K<0.01%+36013F-HRTimelineGroup
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC14,598$575K<0.01%-58,88913F-HRTimelineGroup
XTX Topco Ltdin group XTX Topco Ltd14,486$571K0.01%new13F-HRTimelineGroup
LAZARD ASSET MANAGEMENT LLCin group LAZARD ASSET MANAGEMENT LLC14,312$564K<0.01%+84113F-HRTimelineGroup
BARCLAYS PLCin group BARCLAYS PLC14,145$557K<0.01%-54,81313F-HRTimelineGroup
Financiere des Professionnels - Fonds d…13,775$543K0.03%new13F-HRTimeline
Pathstone Holdings, LLCin group Pathstone Holdings, LLC13,680$539K<0.01%+30713F-HRTimelineGroup
Dynamic Technology Lab Private Ltd13,680$539K0.09%+7,39713F-HRTimeline
Harbour Capital Advisors, LLC11,425$517K0.1%new13F-HRTimeline
CIM, LLC12,526$493K0.07%-8713F-HRTimeline
BNP PARIBAS ASSET MANAGEMENT Holding S.…in group BNP PARIBAS ASSET MANAGEMENT …12,231$482K<0.01%+11,92813F-HRTimelineGroup
ALPS ADVISORS INCin group ALPS ADVISORS INC11,628$458K<0.01%+63713F-HRTimelineGroup
State of Wyoming11,343$447K0.05%-49913F-HRTimeline
CITIGROUP INCin group CITIGROUP INC11,283$444K<0.01%+8,42413F-HRTimelineGroup
MARSHALL WACE, LLPin group MARSHALL WACE, LLP10,839$427K<0.01%-87,16713F-HRTimelineGroup
AVIVA PLCin group AVIVA PLC10,544$415K<0.01%-1,28313F-HRTimelineGroup
Snowden Capital Advisors LLC10,503$415K0.01%-3,48413F-HRTimeline
Tributary Capital Management, LLC10,248$404K0.04%-30013F-HRTimeline
AMALGAMATED BANK10,232$403K<0.01%+9,14713F-HRTimeline
INTECH INVESTMENT MANAGEMENT LLC10,185$401K<0.01%-5,41513F-HRTimeline
SENTINEL PENSION ADVISORS, LLC10,046$396K0.06%-2,50013F-HRTimeline
Yorktown Management & Research Co Inc9,900$390K0.33%013F-HRTimeline
ARIZONA STATE RETIREMENT SYSTEM9,794$386K<0.01%-15013F-HRTimeline
EARNEST PARTNERS LLC9,600$378K<0.01%013F-HRTimeline
YOUSIF CAPITAL MANAGEMENT, LLC9,555$376K<0.01%new13F-HRTimeline
Police & Firemen's Retirement System of…8,922$351K<0.01%013F-HRTimeline
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCH…8,820$347K<0.01%new13F-HRTimeline
Freestone Grove Partners LP8,527$336K<0.01%new13F-HRTimeline
BTC Capital Management, Inc.in group BTC Capital Management, Inc.8,331$328K0.02%new13F-HRTimelineGroup
OREGON PUBLIC EMPLOYEES RETIREMENT FUND8,200$323K<0.01%new13F-HRTimeline
Legato Capital Management LLC8,117$320K0.03%013F-HRTimeline
Verdad Advisers, LP8,091$319K0.36%new13F-HRTimeline
Brooklyn Investment Group7,945$313K0.01%-3,44613F-HRTimeline
PERSONAL CFO SOLUTIONS, LLC7,850$310K0.04%+21813F-HRTimeline
MCMORGAN & CO LLC7,751$305K0.05%-3,60013F-HRTimeline
GWN SECURITIES INC.7,521$296K0.06%new13F-HRTimeline
Brevan Howard Capital Management LPin group Brevan Howard Capital Managem…7,255$286K<0.01%-6,08913F-HRTimelineGroup
Pacer Advisors, Inc.6,251$246K<0.01%new13F-HR/ATimeline
SkyOak Wealth, LLC6,162$243K0.04%-2,80013F-HRTimeline
Swiss Life Asset Management Ltdin group Swiss Life Asset Management L…6,158$243K<0.01%new13F-HRTimelineGroup
Pictet Asset Management Holding SAin group Pictet Asset Management Holdi…6,132$242K<0.01%+1,20913F-HRTimelineGroup
BARRETT & COMPANY, INC.6,022$237K0.08%+513F-HRTimeline
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC5,944$234K<0.01%-29613F-HRTimelineGroup
Universal- Beteiligungs- und Serviceges…in group Universal- Beteiligungs- und …5,799$228K<0.01%013F-HRTimelineGroup
MERCER GLOBAL ADVISORS INC /ADV5,751$227K<0.01%-9413F-HRTimeline
Scientech Research LLC5,737$226K0.19%new13F-HRTimeline
Cornerstone Investment Partners, LLC5,632$222K0.01%new13F-HRTimeline
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…5,612$221K<0.01%+5,39613F-HRTimelineGroup
STEEL GROVE CAPITAL ADVISORS, LLC5,609$221K0.02%-26213F-HRTimeline
Campbell & CO Investment Adviser LLC5,566$219K0.01%-17,81913F-HRTimeline
ProShare Advisors LLC5,386$212K<0.01%-92713F-HRTimeline
Banque Cantonale Vaudoisein group Banque Cantonale Vaudoise5,340$210K0.01%new13F-HRTimelineGroup
Amundiin group Amundi5,304$209K<0.01%new13F-HRTimelineGroup
Maryland State Retirement & Pension Sys…5,275$208K<0.01%new13F-HRTimeline
NLB Skladi, upravljanje premozenja, d.o…5,200$205K0.01%013F-HRTimeline
DekaBank Deutsche Girozentrale4,553$179K<0.01%013F-HRTimeline
FMR LLCin group FMR LLC3,727$147K<0.01%-75713F-HRTimelineGroup
PUBLIC EMPLOYEES RETIREMENT ASSOCIATION…3,551$140K<0.01%013F-HRTimeline
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…2,885$114K<0.01%013F-HRTimelineGroup
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…2,599$102K<0.01%-1,62613F-HRTimelineGroup
Kemnay Advisory Services Inc.2,345$92.4K0.01%-21813F-HRTimeline