NAPCO Security Technologies
NSSC · NASDAQ
$36.45+$0.54 (+1.50%)TodayMarket closed ·
Prev close $35.91
Who owns NSSC
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 49.3% of NSSC’s shares.
- BlackRock Institutional Trust Company, N.A.14.1%
- Copeland Capital Management, LLC5.6%
- Janus Henderson Investors4.7%
- Vanguard Capital Management, LLC4.3%
- Next 6 largest institutions20.5%
- All other shareholders50.7%
| Holder | Shares | % of shares |
|---|---|---|
| BlackRock Institutional Trust Company, N.A. | 5.04M | 14.10% |
| Copeland Capital Management, LLC | 2.02M | 5.64% |
| Janus Henderson Investors | 1.68M | 4.71% |
| Vanguard Capital Management, LLC | 1.53M | 4.27% |
| State Street Investment Management (US) | 1.50M | 4.21% |
| Vanguard Portfolio Management, LLC | 1.49M | 4.18% |
| First Trust Advisors L.P. | 1.30M | 3.65% |
| Geode Capital Management, L.L.C. | 1.20M | 3.35% |
| Wellington Management Company, LLP | 1.10M | 3.09% |
| Soloway (Richard L) | 729.96K | 2.04% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| iShares Core S&P Small-Cap ETF | 2.17M | 6.09% |
| First Trust SMID Cap Rising Dividend Achievers ETF | 1.24M | 3.47% |
| Vanguard Total Stock Market Index Fund | 1.08M | 3.03% |
| Vanguard Information Technology Index Fund | 900.46K | 2.52% |
| iShares Russell 2000 ETF | 892.95K | 2.50% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders sold $18.26M (4 trades) of NSSC on the open market, with no buys.
| Insider | Type | Shares | Value |
|---|---|---|---|
| SOLOWAY RICHARD | Award | 11.66K | $442.10K |
| BUCHEL KEVIN S | Award | 13.12K | $497.25K |
| Soloway Donna Anne | Sale | 20.96K | $725.70K |
| SOLOWAY RICHARD | Sale | 379.53K | $13.09M |
| Soloway Donna Anne | Sale | 28.00K | $1.01M |
| SOLOWAY RICHARD | Sale | 95.47K | $3.43M |
| Soloway Donna Anne | Option exercise | 4.00K | $107.76K |
| Soloway Donna Anne | Option exercise | 10.00K | $229.30K |
| Soloway Donna Anne | Option exercise | 7.50K | $87.56K |
| Soloway Donna Anne | Option exercise | 8.00K | $122.16K |
Short interest
Settled Sep 30, 2026
- Shares short
- 2.35M
- Days to cover
- 6.60
- % of shares outstanding
- 6.58%
- Average daily volume
- 356.45K
- Change since last report
- −9.3%
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