NSSC
NAPCO Sec Tech (NSSC)
NASDAQ
$36.60+$0.34 (+0.92%)
Price as of Sep 11, 2026 7:30 PM EDT
  • $1.3B
    Market Cap
  • -12.15%
    1-Year Change
  • Security & Protection Services
    Industry

Top Holders

Institutional
Mutual Funds
Holder
Ownership %
Shares Held
Change (Shares, %)
Report Date
BLACKROCK, INC.
15.77%
5.6M
-49,124 (-0.87%)
Jun 30, 2026
BLACKROCK FUNDING, INC. /DE
8.87%
3.2M
-116,418 (-3.67%)
Dec 31, 2024
VANGUARD GROUP INC
8.07%
2.9M
+31,644 (+1.10%)
Dec 31, 2025
BLACKROCK INC.
7.59%
2.7M
+265,845 (+9.81%)
Jun 30, 2024
COPELAND CAPITAL MANAGEMENT, LLC
5.65%
2.0M
+7,784 (+0.39%)
Jun 30, 2026
N/A
4.71%
1.7M
+1.7M (+100.00%)
Jun 30, 2026
JUPITER TOPCO LLC
4.71%
1.7M
+1.7M (+100.00%)
Jun 30, 2026

Current Ownership Distribution

  • Institutions567.3M (78.38%)
  • Mutual Funds154.1M (21.29%)
  • Insiders2.4M (0.33%)
  • Other0 (0.00%)

Insider Transactions

  • 0.33% (2.4M)
    Current InsiderOwnership (%, shares)
  • 0
    Number of InsiderBuying (last 12 months)
  • $0.00
    Amount of InsiderBuying (last 12 months)
  • 2
    Number of InsiderSelling (last 12 months)
  • $88.9M
    Amount of InsiderSelling (last 12 months)
Insider Name & Title
Type
Date
Transaction Value
Shares
Share Price
Shares After Transactions
SOLOWAY RICHARD
Founder and Executive Chairman
Sell
Aug 27, 2026
$13.1M
379,529
$34.50
621,958
SOLOWAY RICHARD
Founder and Executive Chairman
Sell
Aug 26, 2026
$3.4M
95,471
$35.93
1.0M
Spinelli Stephen M
Senior Vice President of Sales
Exempt
Mar 17, 2026
$139,999.44
13,972
$10.02
9,980
Spinelli Stephen M
Senior Vice President of Sales
Exempt
Mar 17, 2026
$139,999.44
13,972
$10.02
14,900
Spinelli Stephen M
Senior Vice President of Sales
In Kind
Mar 17, 2026
$140,011.08
3,212
$43.59
11,688
CARRIERI MICHAEL
Executive VP of Engineering
Exempt
Feb 26, 2026
$224,950.00
10,000
$22.50
0
CARRIERI MICHAEL
Executive VP of Engineering
Exempt
Feb 26, 2026
$224,950.00
10,000
$22.50
33,261
CARRIERI MICHAEL
Executive VP of Engineering
In Kind
Feb 26, 2026
$314,126.73
6,651
$47.23
26,610
BUCHEL KEVIN S
President & COO
Exempt
Feb 19, 2026
$1.1M
50,000
$22.50
47,584
BUCHEL KEVIN S
President & COO
Exempt
Feb 19, 2026
$1.1M
50,000
$22.50
112,739
BUCHEL KEVIN S
President & COO
In Kind
Feb 19, 2026
$1.5M
33,560
$44.98
79,179
SOLOWAY RICHARD
CEO, Chairman of Board, Secy
Exempt
Feb 10, 2026
$2.2M
100,000
$22.50
0
SOLOWAY RICHARD
CEO, Chairman of Board, Secy
Exempt
Feb 10, 2026
$215,520.00
8,000
$26.94
2,000
SOLOWAY RICHARD
CEO, Chairman of Board, Secy
Exempt
Feb 10, 2026
$2.2M
100,000
$22.50
1.4M
SOLOWAY RICHARD
CEO, Chairman of Board, Secy
In Kind
Feb 10, 2026
$3.2M
74,878
$42.63
1.3M
SOLOWAY RICHARD
CEO, Chairman of Board, Secy
Exempt
Feb 10, 2026
$215,520.00
8,000
$26.94
1.3M
SOLOWAY RICHARD
CEO, Chairman of Board, Secy
In Kind
Feb 10, 2026
$305,827.62
7,174
$42.63
1.3M
SOLOWAY RICHARD
CEO, Chairman of Board, Secy
Sell
Feb 05, 2026
$6.4M
150,000
$42.74
1.3M
Spinelli Stephen M
Senior Vice president of Sales
Sell
Nov 17, 2025
$764,750.00
19,000
$40.25
928