Company · Ownership research

NAPCO SECURITY TECHNOLOGIES, INC NSSC

CIK 0000069633 · CUSIP 630402105

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 630402105 (NSSC), not CUSIP 630402905 (NSSC), CUSIP 630402955 (NSSC), and does not merge CUSIPs.

This page lists the top 20 of 273 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	BlackRock Inc. CIK 1364742 · View history	$140.82M 2,710,725 shares	0.00%	+265.85K(+10.90%)Added	SEC filing ↗ Aug 13, 2024	▾
02	VANGUARD GROUP INC CIK 102909 · View history	$139.38M 2,682,904 shares	0.00%	+126.77K(+5.00%)Added	SEC filing ↗ Aug 13, 2024	▾
03	T. Rowe Price Investment Management, Inc. CIK 1897612 · View history	$96.22M 1,852,061 shares	0.06%	-364.74K(-16.50%)Reduced	SEC filing ↗ Aug 14, 2024	▾
04	FMR LLC CIK 315066 · View history	$83.52M 1,607,700 shares	0.01%	-13.40K(-0.80%)Reduced	SEC filing ↗ Aug 13, 2024	▾
05	FIL Ltd CIK 318989 · View history	$76.28M 1,468,328 shares	0.08%	0(0.00%)Unchanged	SEC filing ↗ Aug 13, 2024	▾
06	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$55.60M 1,070,334 shares	0.01%	-117.15K(-9.90%)Reduced	SEC filing ↗ Aug 9, 2024	▾
07	JANUS HENDERSON GROUP PLC CIK 1274173 · View history	$47.44M 913,254 shares	0.03%	-20.28K(-2.20%)Reduced	SEC filing ↗ Aug 14, 2024	▾
08	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$43.58M 838,731 shares	0.00%	+75.00K(+9.80%)Added	SEC filing ↗ Aug 9, 2024	▾
09	GW&K Investment Management, LLC CIK 1082917 · View history	$42.49M 817,817 shares	0.39%	-116.00K(-12.40%)Reduced	SEC filing ↗ Aug 12, 2024	▾
10	Aberdeen Group plc CIK 1716774 · View history	$41.97M 807,939 shares	0.08%	-75.79K(-8.60%)Reduced	SEC filing ↗ Aug 9, 2024	▾
11	NEXT CENTURY GROWTH INVESTORS LLC CIK 1134007 · View history	$40.70M 783,449 shares	3.38%	+46.64K(+6.30%)Added	SEC filing ↗ Aug 14, 2024	▾
12	STATE STREET CORP CIK 93751 · View history	$39.81M 766,396 shares	0.00%	+39.49K(+5.40%)Added	SEC filing ↗ Aug 14, 2024	▾
13	WELLINGTON MANAGEMENT GROUP LLP CIK 902219 · View history	$35.15M 676,647 shares	0.01%	+5.80K(+0.90%)Added	SEC filing ↗ Aug 14, 2024	▾
14	VAUGHAN NELSON INVESTMENT MANAGEMENT, L.P. CIK 1021642 · View history	$31.50M 606,440 shares	0.29%	+606.44KNew	SEC filing ↗ Jul 19, 2024	▾
15	Granite Investment Partners, LLC CIK 1542266 · View history	$30.81M 593,137 shares	1.28%	-72.28K(-10.90%)Reduced	SEC filing ↗ Aug 12, 2024	▾
16	NORTHERN TRUST CORP CIK 73124 · View history	$30.49M 586,822 shares	0.01%	-1.91K(-0.30%)Reduced	SEC filing ↗ Aug 14, 2024	▾
17	ROYAL BANK OF CANADA CIK 1000275 · Amended · View history	$29.00M 558,273 shares	0.01%	+35.43K(+6.80%)Added	SEC filing ↗ Nov 6, 2024	▾
18	Copeland Capital Management, LLC CIK 1541743 · View history	$25.86M 497,692 shares	0.48%	+336.65K(+209.10%)Added	SEC filing ↗ Jul 26, 2024	▾
19	EMERALD ADVISERS, LLC CIK 1015083 · View history	$25.38M 488,583 shares	1.06%	+264.79K(+118.30%)Added	SEC filing ↗ Aug 6, 2024	▾
20	ROYCE & ASSOCIATES LP CIK 906304 · View history	$22.20M 427,430 shares	0.21%	+23.43K(+5.80%)Added	SEC filing ↗ Aug 13, 2024	▾

Showing 20 / 273 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

273

Cancelled or null records excluded

Disclosed shares

33,429,395

Not deduplicated across managers

Disclosed value

$1.74B

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

NAPCO SECURITY TECHNOLOGIES, INC · Q2 2024

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.