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NSSC · Napco Security Technologies, Inc · Holdings

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$35.16 -0.03 (-0.09%) At close · Oct 8
Market Cap
$1.26B
Shares
35.77M
Volume · Oct 8 426.92K Avg daily vol (3M) 378.78K

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.

Some SEC filings for this period have not finished importing. Holder totals and changes may be incomplete; these filings remain queued for recovery.
The Sep 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out. Each fund's Change is measured against its own previous reported quarter, shown in the Reported column. Pick a completed quarter in the Quarter selector below to put every fund on one quarter and see the stock-wide activity breakdown.
Holders: 257
Total Value: $1,371,030,661
Total Shares: 36,117,952
Showing 1–100 of 257 holdings by value · page 1 of 3

Institutional Ownership Trend

27 quarters

Holder Concentration

Across 259 13F filers
Top Holder
15.6%
Sep 2023 → Jun 2026 · range 8.1% – 16.4%
of institutional value
Top 5
34.2%
Sep 2023 → Jun 2026 · range 30.6% – 34.9%
of institutional value
Top 10
51.0%
Sep 2023 → Jun 2026 · range 43.7% – 51.0%
of institutional value
HHI
430
Sep 2023 → Jun 2026 · range 293 – 442
Broadly held
Showing 100 of 257
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 69633 CUSIP 630402105 13F (30d) 11 filings 10 filers Visit website Investor relations