NAPCO SECURITY TECHNOLOGIES, INC (NSSC) — Institutional Holders, Q2 2026

259 institutional investment managers reported a NSSC position on SEC Form 13F-HR for the quarter ended June 30, 2026, with a combined reported value of $1.4B. Every filer is listed below, ranked by position value, 100 per page; this page shows ranks 1 to 100. Put and call option positions are excluded, and a firm filing several lots or share classes is shown once with its total.

← NSSC stock profile

NSSC in Q2 2026: what funds did

Funds that filed a 13F for both Q1 2026 and Q2 2026, by what they did with the common stock. Share counts are adjusted for any split between the two quarters; dollar figures are the change in shares at this quarter’s price.

New positions

Added to

106

Trimmed

Sold out

Biggest buyers

FIRST ADVISORSAdded · +618,885 sh+$23.5M
MORGAN STANLEYAdded · +494,916 sh+$18.8M
DEPRINCE RACE & ZOLLOAdded · +289,869 sh+$11.0M
Fundsmith LLPAdded · +223,378 sh+$8.5M
HEALTHCARE OF ONTARIO PENSION PLAN FUNDAdded · +192,085 sh+$7.3M

Biggest sellers

PRUDENTIAL FINANCIALTrimmed · -475,210 sh-$18.0M
JACOBS LEVY EQUITY MANAGEMENTTrimmed · -211,118 sh-$8.0M
ALGERT GLOBALTrimmed · -202,138 sh-$7.7M
Man Group plcTrimmed · -187,104 sh-$7.1M
Qube Research & Technologies LtdSold out · -166,639 sh-$6.3M

NSSC 13F holders ranked 1–100 of 259

Institutional investors reporting a position in NAPCO SECURITY TECHNOLOGIES, INC on SEC Form 13F-HR for Q2 2026, ranked by reported value.
#	Institution	Shares	Value	% of portfolio	QoQShares vs Q1 2026
1	BlackRock#1 · 5,632,646 sh	5,632,646	$213.9M	<0.01%	-0.9%
2	Copeland Capital Management#2 · 2,016,873 sh	2,016,873	$76.6M	—	+0.4%
3	Jupiter Topco#3 · 1,682,208 sh	1,682,208	$63.9M	0.03%	—
4	VANGUARD CAPITAL MANAGEMENT#4 · 1,526,818 sh	1,526,818	$58.0M	<0.01%	+1.4%
5	STATE STREET#5 · 1,504,759 sh	1,504,759	$57.4M	<0.01%	+5.1%
6	VANGUARD PORTFOLIO MANAGEMENT#6 · 1,494,431 sh	1,494,431	$56.8M	<0.01%	+2.1%
7	FIRST ADVISORS#7 · 1,304,074 sh	1,304,074	$49.5M	0.03%	+90.3%
8	GEODE CAPITAL MANAGEMENT#8 · 1,196,951 sh	1,196,951	$45.5M	<0.01%	+8.0%
9	WELLINGTON MANAGEMENT GROUP LLP#9 · 1,102,280 sh	1,102,280	$41.9M	<0.01%	+18.6%
10	MORGAN STANLEY#10 · 959,777 sh	959,777	$36.5M	<0.01%	+106.5%
11	DIMENSIONAL FUND ADVISORS#11 · 725,550 sh	725,550	$27.6M	<0.01%	+3.2%
12	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP#12 · 697,937 sh	697,937	$26.5M	0.01%	-17.5%
13	Doma Perpetual Capital Management#13 · 627,931 sh	627,931	$23.8M	5.54%	0.0%
14	NORTHERN#14 · 610,616 sh	610,616	$23.2M	<0.01%	+4.5%
15	Fundsmith LLP#15 · 606,974 sh	606,974	$23.1M	0.17%	+58.2%
16	BESSEMER GROUP#16 · 430,452 sh	430,452	$16.4M	0.02%	+47.0%
17	DEPRINCE RACE & ZOLLO#17 · 408,632 sh	408,632	$15.5M	—	+244.1%
18	ROYAL BANK OF CANADA#18 · 406,408 sh	406,408	$15.4M	<0.01%	-14.7%
19	RENAISSANCE TECHNOLOGIES#19 · 406,200 sh	406,200	$15.4M	0.02%	-7.0%
20	Point72 Asset Management, L.P.#20 · 379,686 sh	379,686	$14.4M	0.02%	-21.3%
21	ENVESTNET ASSET MANAGEMENT#21 · 378,803 sh	378,803	$14.4M	<0.01%	+0.8%
22	GOLDMAN SACHS GROUP#22 · 369,290 sh	369,290	$14.0M	<0.01%	-8.4%
23	CHARLES SCHWAB INVESTMENT MANAGEMENT#23 · 354,531 sh	354,531	$13.5M	<0.01%	+4.7%
24	Bank of New York Mellon#24 · 311,009 sh	311,009	$11.8M	<0.01%	+2.7%
25	AQR CAPITAL MANAGEMENT#25 · 295,923 sh	295,923	$11.2M	<0.01%	+3.8%
26	CONGRESS ASSET MANAGEMENT#26 · 285,462 sh	285,462	$10.8M	—	+13.1%
27	CAPTRUST FINANCIAL ADVISORS#27 · 278,678 sh	278,678	$10.6M	0.02%	+1.6%
28	FEDERATED HERMES#28 · 277,694 sh	277,694	$10.5M	0.02%	+3.0%
29	PRUDENTIAL FINANCIAL#29 · 274,820 sh	274,820	$10.4M	0.01%	-63.4%
30	LOS ANGELES CAPITAL MANAGEMENT#30 · 274,050 sh	274,050	$10.4M	0.04%	+125.6%
31	Granite Investment Partners#31 · 266,069 sh	266,069	$10.1M	0.52%	-0.5%
32	Visionary Wealth Advisors#32 · 262,368 sh	262,368	$10.0M	0.39%	0.0%
33	Trexquant Investment#33 · 261,334 sh	261,334	$9.9M	0.06%	+52.7%
34	Russell Investments Group, Ltd.#34 · 256,442 sh	256,442	$9.7M	<0.01%	+20.0%
35	Nuveen#35 · 255,569 sh	255,569	$9.7M	<0.01%	+28.3%
36	VANGUARD FIDUCIARY#36 · 254,169 sh	254,169	$9.7M	<0.01%	+3.1%
37	WASATCH ADVISORS#37 · 242,585 sh	242,585	$9.2M	—	0.0%
38	PRINCIPAL FINANCIAL GROUP#38 · 230,017 sh	230,017	$8.7M	<0.01%	+2.1%
39	HEALTHCARE OF ONTARIO PENSION PLAN FUND#39 · 224,298 sh	224,298	$8.5M	0.01%	+596.3%
40	CRAWFORD INVESTMENT COUNSEL#40 · 223,794 sh	223,794	$8.5M	0.14%	+60.7%
41	JPMORGAN CHASE#41 · 214,871 sh	214,871	$8.1M	<0.01%	+109.5%
42	HRT FINANCIAL#42 · 202,166 sh	202,166	$7.7M	0.02%	+207.1%
43	JACOBS LEVY EQUITY MANAGEMENT#43 · 201,670 sh	201,670	$7.7M	0.03%	-51.1%
44	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AME#44 · 196,242 sh	196,242	$7.5M	<0.01%	-27.9%
45	Invesco Ltd.#45 · 190,854 sh	190,854	$7.2M	<0.01%	+53.4%
46	NEW YORK STATE COMMON RETIREMENT FUND#46 · 186,274 sh	186,274	$7.1M	<0.01%	+155.5%
47	GAMCO INVESTORS, ET AL#47 · 178,900 sh	178,900	$6.8M	0.06%	0.0%
48	Rockefeller Capital Management L.P.#48 · 178,187 sh	178,187	$6.8M	0.01%	+50.0%
49	TWO SIGMA INVESTMENTS#49 · 172,667 sh	172,667	$6.6M	<0.01%	+100.3%
50	SG Capital Management#50 · 170,793 sh	170,793	$6.5M	0.54%	+59.4%
51	KORNITZER CAPITAL MANAGEMENT#51 · 168,717 sh	168,717	$6.4M	0.13%	-0.4%
52	UBS Group AG#52 · 167,284 sh	167,284	$6.4M	<0.01%	+229.5%
53	BANK OF AMERICA#53 · 158,484 sh	158,484	$6.0M	<0.01%	-28.5%
54	RICE HALL JAMES & ASSOCIATES#54 · 153,577 sh	153,577	$5.8M	0.28%	+4.6%
55	PUBLIC SECTOR PENSION INVESTMENT BOARD#55 · 153,239 sh	153,239	$5.8M	0.02%	+20.1%
56	SEI INVESTMENTS#56 · 134,961 sh	134,961	$5.1M	<0.01%	+2.7%
57	ISTHMUS PARTNERS#57 · 117,950 sh	117,950	$4.5M	—	+2.0%
58	Redmond Asset Management#58 · 117,784 sh	117,784	$4.5M	1.12%	-0.8%
59	HighTower Advisors#59 · 112,128 sh	112,128	$4.3M	<0.01%	-5.1%
60	ALTA CAPITAL MANAGEMENT#60 · 109,200 sh	109,200	$4.1M	—	-9.4%
61	AMERICAN CENTURY COMPANIES#61 · 97,700 sh	97,700	$3.7M	<0.01%	+8.0%
62	Vest Financial#62 · 96,069 sh	96,069	$3.6M	—	+111.6%
63	PDT Partners#63 · 93,227 sh	93,227	$3.5M	0.19%	-20.5%
64	STIFEL FINANCIAL#64 · 93,156 sh	93,156	$3.5M	<0.01%	-0.6%
65	Legal & General Group Plc#65 · 84,279 sh	84,279	$3.2M	<0.01%	+1.3%
66	Bridge City Capital#66 · 84,131 sh	84,131	$3.2M	0.73%	+43.5%
67	RHUMBLINE ADVISERS#67 · 83,395 sh	83,395	$3.2M	<0.01%	-10.9%
68	Linden Thomas Advisory Services#68 · 80,539 sh	80,539	$3.1M	—	+11.1%
69	CANADA PENSION PLAN INVESTMENT BOARD#69 · 71,300 sh	71,300	$2.7M	<0.01%	-56.1%
70	Swiss National Bank#70 · 70,000 sh	70,000	$2.7M	<0.01%	-0.6%
71	AMERIPRISE FINANCIAL#71 · 66,266 sh	66,266	$2.5M	<0.01%	+2.4%
72	TEACHERS RETIREMENT SYSTEM OF THE STATE OF KENTUCKY#72 · 64,611 sh	64,611	$2.5M	0.02%	+24.3%
73	Allianz Asset Management GmbH#73 · 60,650 sh	60,650	$2.4M	<0.01%	0.0%
74	SG Americas Securities#74 · 62,694 sh	62,694	$2.4M	<0.01%	+158.9%
75	Vident Advisory#75 · 60,130 sh	60,130	$2.3M	0.02%	+23.0%
76	Quantinno Capital Management#76 · 58,972 sh	58,972	$2.2M	<0.01%	+203.0%
77	VICTORY CAPITAL MANAGEMENT#77 · 58,024 sh	58,024	$2.2M	<0.01%	+19.6%
78	Engineers Gate Manager#78 · 55,530 sh	55,530	$2.1M	0.03%	+34.8%
79	Divisadero Street Capital Management#79 · 50,799 sh	50,799	$1.9M	0.04%	0.0%
80	SEIZERT CAPITAL PARTNERS#80 · 48,631 sh	48,631	$1.8M	0.08%	+8.5%
81	Corient Private Wealth#81 · 48,576 sh	48,576	$1.8M	<0.01%	+326.5%
82	RAYMOND JAMES FINANCIAL#82 · 48,084 sh	48,084	$1.8M	<0.01%	+11.8%
83	WELLS FARGO & COMPANY#83 · 41,503 sh	41,503	$1.6M	<0.01%	+93.4%
84	VIRGINIA RETIREMENT SYSTEMS ET Al#84 · 40,948 sh	40,948	$1.6M	<0.01%	+160.0%
85	FIRST NATIONAL BANK OF OMAHA#85 · 40,823 sh	40,823	$1.6M	0.04%	-49.2%
86	First National Advisers#86 · 39,698 sh	39,698	$1.5M	0.21%	-45.1%
87	Gotham Asset Management#87 · 39,438 sh	39,438	$1.5M	<0.01%	-14.4%
88	Hennion & Walsh Asset Management#88 · 39,026 sh	39,026	$1.5M	—	+2.8%
89	ALGERT GLOBAL#89 · 39,018 sh	39,018	$1.5M	0.02%	-83.8%
90	ALLIANCEBERNSTEIN L.P.#90 · 36,250 sh	36,250	$1.4M	<0.01%	-3.7%
91	DEUTSCHE BANK AG\#91 · 37,232 sh	37,232	$1.4M	<0.01%	+18.3%
92	HANTZ FINANCIAL SERVICES#92 · 34,513 sh	34,513	$1.3M	0.02%	-8.6%
93	WINTON GROUP Ltd#93 · 34,239 sh	34,239	$1.3M	0.04%	+4.6%
94	PRICE T ROWE ASSOCIATES#94 · 34,030 sh	34,030	$1.3M	<0.01%	+9.6%
95	CAPITAL FUND MANAGEMENT S.A.#95 · 33,487 sh	33,487	$1.3M	<0.01%	New
96	BARCLAYS PLC#96 · 31,044 sh	31,044	$1.2M	<0.01%	+119.5%
97	Zurcher Kantonalbank (Zurich Cantonalbank)#97 · 30,449 sh	30,449	$1.2M	<0.01%	+11.4%
98	Creative Planning#98 · 30,383 sh	30,383	$1.2M	<0.01%	-17.9%
99	Magnetar Financial#99 · 29,415 sh	29,415	$1.1M	0.01%	+29.6%
100	HERITAGE INVESTORS MANAGEMENT#100 · 29,097 sh	29,097	$1.1M	0.03%	0.0%

Funds that sold out of NSSC in Q2 2026 (38)

Held NSSC at the end of Q1 2026 and filed a Q2 2026 13F without it. Not in the list above, because they no longer hold it. Largest prior position first.

Institutions that held NSSC in Q1 2026 and reported no position in Q2 2026.
Institution	Shares sold	Value in Q1 2026
Qube Research & Technologies Ltd166,639 sh	166,639	$6.6M
Uniplan Investment Counsel113,389 sh	113,389	$4.5M
Walleye Capital89,398 sh	89,398	$3.5M
CITADEL ADVISORS69,690 sh	69,690	$2.7M
BALYASNY ASSET MANAGEMENT L.P.27,984 sh	27,984	$1.1M
Integrated Quantitative Investments27,424 sh	27,424	$1.1M
TWINBEECH CAPITAL26,100 sh	26,100	$1.0M
SUSQUEHANNA INTERNATIONAL GROUP, LLP19,318 sh	19,318	$760.9K
Ellsworth Advisors18,774 sh	18,774	$739.5K
LEUCADIA NATIONAL18,558 sh	18,558	$731.0K
MILLENNIUM MANAGEMENT14,598 sh	14,598	$575.0K
XTX Topco Ltd14,486 sh	14,486	$570.6K
Dynamic Technology Lab Private Ltd13,680 sh	13,680	$538.9K
MARSHALL WACE, LLP10,839 sh	10,839	$426.9K
Tributary Capital Management10,248 sh	10,248	$403.7K
Verdad Advisers8,091 sh	8,091	$318.7K
GWN SECURITIES7,521 sh	7,521	$296.3K
Swiss Life Asset Management Ltd6,158 sh	6,158	$242.6K
MERCER GLOBAL ADVISORS5,751 sh	5,751	$226.5K
Scientech Research5,737 sh	5,737	$226.0K
Campbell & Investment Adviser5,566 sh	5,566	$219.2K
ProShare Advisors5,386 sh	5,386	$212.2K
Amundi5,304 sh	5,304	$209.0K
Maryland State Retirement & Pension System5,275 sh	5,275	$207.8K
NLB Skladi, upravljanje premozenja, d.o.o.5,200 sh	5,200	$204.8K
QUADRANT CAPITAL GROUP1,482 sh	1,482	$78.2K
Advisory Services Network1,020 sh	1,020	$40.2K
KBC Group NV651 sh	651	$26.0K
Salomon & Ludwin346 sh	346	$13.8K
Western Wealth Management212 sh	212	$8.3K
Physician Wealth Advisors177 sh	177	$7.0K
Whipplewood Advisors108 sh	108	$4.3K
Altshuler Shaham Ltd98 sh	98	$3.9K
Root Financial Partners70 sh	70	$2.8K
Golden State Equity Partners50 sh	50	$2.0K
MAI Capital Management46 sh	46	$1.8K
GILPIN WEALTH MANAGEMENT6 sh	6	$237.00
Ankerstar Wealth3 sh	3	$118.00

Source: Form 13F-HR filings on SEC EDGAR, Q2 2026. Values are as reported by each manager at quarter end. “% of portfolio” is the position’s share of the manager’s total reported 13F value for the same quarter. “New” means the manager filed a 13F for Q1 2026 without this position; a dash means no comparison is available. Where a manager’s own filing is internally inconsistent its value is withheld and it is listed last. 13F data shows reported holdings, not recommendations.