Comparable stake leader
BlackRock, Inc.
SEC ownership of NAPCO SECURITY TECHNOLOGIES, INC
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0000069633.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
31 Mar 2026
- Public ticker
- NSSC on Nasdaq
- Parsed ownership sources
- 13F, 13D/G, and 3/4/5
- Largest SEC-reported holder
- BlackRock, Inc.
- Latest 13D/G holder
- BlackRock, Inc.
- Latest parsed ownership date
- 31 Mar 2026
- Issuer CIK
- 0000069633
- Issuer location
- Amityville, NY
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
2 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of NAPCO SECURITY TECHNOLOGIES, INC (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
BlackRock, Inc.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
31 Mar 2026
13F
13D/G
3/4/5
Lead comparable stake: 15%
13D/G row: BlackRock, Inc.
Showing 1-8 of 50 holder rows.
Quick read
BlackRock, Inc. leads the comparable SEC ownership view at 15%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens BlackRock, Inc.'s linked filing trail.
Comparable ownership
Top 5
BlackRock, Inc.
15%
Copeland Capital Management, LLC
5.6%
FMR LLC
3%
Michael Carrieri
0.07%
VANGUARD CAPITAL MANAGEMENT LLC
4.2%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| BlackRock, Inc. |
13F
13D/G
Company
|
15%
from 13D/G
|
$223,804,902
5,681,770 shares
|
— | 31 Mar 2026 |
| Copeland Capital Management, LLC |
13D/G
13F
Company
|
5.6%
|
$80,845,701
2,009,088 shares
|
$0 | 31 Mar 2026 |
| FMR LLC |
13D/G
13F
Company
|
3%
|
$24,911,405
1,094,045 shares
|
$0 | 31 Mar 2025 |
| Michael Carrieri |
3/4/5
Executive VP of Engineering
|
0.07%
|
$1,256,790
26,610 shares
|
— | 26 Feb 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13F
Company
|
4.2%
|
$59,288,922
1,505,177 shares
|
— | 31 Mar 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC |
13F
Company
|
4.1%
|
$57,675,311
1,464,212 shares
|
— | 31 Mar 2026 |
| STATE STREET CORP |
13F
Company
|
4%
|
$56,519,754
1,431,503 shares
|
— | 31 Mar 2026 |
| JANUS HENDERSON GROUP PLC |
13F
Company
|
4%
|
$56,142,729
1,424,963 shares
|
— | 31 Mar 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$15,400,987.
Buys
$0
Insiders: 0
Sells
$15,400,987
Insiders: 2
Net
-$15,400,987
Shares: -354,000
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 354,000
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 335,000 | $0 | $14,636,237 | -$14,636,237 |
| 6-9 | 0 | 19,000 | $0 | $764,750 | -$764,750 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-12 of 12 reporting-owner rows connected to NAPCO SECURITY TECHNOLOGIES, INC. Open a relationship link for the CIK-to-CIK filing trail.
Rows
12
Largest Forms 3/4/5 holder
Richard Soloway
Net 12M change
-$15,400,987
Latest report
18 May 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Richard Soloway | CEO, Chairman of Board, Secy, Director | $47,498,004 | -$14,636,237 | -24% | Mixed | 02 Mar 2026 |
| Kevin S. Buchel | President & COO, Director | $4,631,873 | Mixed | 19 Feb 2026 | ||
| Donna Anne Soloway | Director | $2,269,623 | Mixed | 18 May 2026 | ||
| Michael Carrieri | Executive VP of Engineering | $1,256,790 | Mixed | 26 Feb 2026 | ||
| Stephen M. Spinelli | Senior Vice President of Sales | $1,010,812 | -$764,750 | -43% | Mixed | 17 Mar 2026 |
| Paul Stephen Beeber | Director | $362,149 | Mixed | 12 Sep 2024 | ||
| Andrew Wilder | Director | $341,010 | Mixed | 25 Aug 2022 | ||
| Rick A. Lazio | Director | $202,500 | Mixed | 25 Aug 2022 | ||
| Robert A. Ungar | Director | $186,300 | Mixed | 25 Aug 2022 | ||
| David Alexander Paterson | Director | Mixed | 02 Feb 2023 | |||
| Joseph Casmir Pipczynski | Chief Revenue Officer | Mixed | 29 Jan 2026 | |||
| Andrew J. Vuono | SVP of Finance and CAO | Mixed | 03 Jun 2024 |
Recent insider transactions for NAPCO SECURITY TECHNOLOGIES, INC
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Donna Anne Soloway | NSSC | Common Stock | Options Exercise | 522.8% | 41,100 | 48,962 | 18 May 2026 | Direct | ||
| Donna Anne Soloway | NSSC | Non-Employee Stock Option (Right to Buy) | Options Exercise | -100% | -41,100 | 0 | 18 May 2026 | Direct | ||
| Stephen M. Spinelli | NSSC | Common Stock | Tax liability | -21.6% | -3,212 | 11,688 | 17 Mar 2026 | Direct | ||
| Stephen M. Spinelli | NSSC | Common Stock | Options Exercise | 1505.6% | 13,972 | 14,900 | 17 Mar 2026 | Direct | ||
| Stephen M. Spinelli | NSSC | Employee Stock Option (Right to Buy) | Options Exercise | -58.3% | -13,972 | 9,980 | 17 Mar 2026 | Direct | ||
| Richard Soloway | NSSC | Common Stock | Sale | -4.8% | $2,390,844 | $43.22 | -55,318 | 1,096,958 | 03 Mar 2026 | Direct |
| Richard Soloway | NSSC | Common Stock | Sale | -10.1% | $5,834,393 | $44.99 | -129,682 | 1,152,276 | 02 Mar 2026 | Direct |
| Michael Carrieri | NSSC | Common Stock | Tax liability | -20% | -6,651 | 26,610 | 26 Feb 2026 | Direct | ||
| Michael Carrieri | NSSC | Common Stock | Options Exercise | 43% | 10,000 | 33,261 | 26 Feb 2026 | Direct | ||
| Michael Carrieri | NSSC | Employee Stock Option (Right to Buy) | Options Exercise | -100% | -10,000 | 0 | 26 Feb 2026 | Direct | ||
| Kevin S. Buchel | NSSC | Common Stock | Tax liability | -29.8% | -33,560 | 79,179 | 19 Feb 2026 | Direct | ||
| Kevin S. Buchel | NSSC | Common Stock | Options Exercise | 79.7% | 50,000 | 112,739 | 19 Feb 2026 | Direct | ||
| Kevin S. Buchel | NSSC | Employee Stock Option (Right to Buy) | Options Exercise | -51.2% | -50,000 | 47,584 | 19 Feb 2026 | Direct | ||
| Richard Soloway | NSSC | Common Stock | Tax liability | -6.02% | -82,052 | 1,281,132 | 10 Feb 2026 | Direct | ||
| Richard Soloway | NSSC | Common Stock | Options Exercise | 8.65% | 108,000 | 1,356,010 | 10 Feb 2026 | Direct | ||
| Richard Soloway | NSSC | Employee Stock Option (Right to Buy) | Options Exercise | -100% | -108,000 | 0 | 10 Feb 2026 | Direct | ||
| Richard Soloway | NSSC | Common Stock | Sale | -10.7% | $6,411,000 | $42.74 | -150,000 | 1,256,010 | 05 Feb 2026 | Direct |
| Stephen M. Spinelli | NSSC | Common Stock | Sale | -95.3% | $764,750 | $40.25 | -19,000 | 928 | 17 Nov 2025 | Direct |
| Michael Carrieri | NSSC | Common Stock | Tax liability | -22.6% | -6,576 | 22,532 | 17 Sep 2025 | Direct | ||
| Michael Carrieri | NSSC | Common Stock | Options Exercise | 75.8% | 12,000 | 27,837 | 17 Sep 2025 | Direct | ||
| Michael Carrieri | NSSC | Employee Stock Option (Right to Buy) | Options Exercise | -85.7% | -12,000 | 2,000 | 17 Sep 2025 | Direct |
* marks a reported price that did not pass the local price check.