Skip to main content
NSSC logo

NSSC · Napco Security Technologies, Inc

Track NSSC — free
$43.19 +5.10 (+13.39%) Earnings today
Market Cap
$1.36B
Shares
35.73M

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.

Holders: 257
Total Value: $1,368,706,986
Total Shares: 36,037,673

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 257 13F filers · Δ vs Mar 31, 2026
Top Holder
15.6%
Sep 2023 → Jun 2026 · range 8.1% – 16.4%
−0.8 pts
Top 5
34.3%
Sep 2023 → Jun 2026 · range 30.6% – 34.9%
−0.6 pts
Top 10
51.1%
Sep 2023 → Jun 2026 · range 43.7% – 51.1%
+1.6 pts
HHI
431
Sep 2023 → Jun 2026 · range 293 – 443
Broadly held−11

Quarterly Activity

vs Mar 31, 2026
New
30
Increased
105
Decreased
90
Sold Out
44
Unchanged
32
Holder count: -14
Institutional value: +0.3%
Shares held: +4.0%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 257
Export CSV
Holder Value (USD) % of 13F Shares Open
Key facts CIK 69633 CUSIP 630402105 13F (30d) 219 filings 216 filers Visit website Investor relations