Napco Security Technologies, Inc
NSSC- Exchange
- Nasdaq
- Industry
- Communications Equipment, NEC
- SEC CIK
- 0000069633
In the last 90 days, Napco Security Technologies, Inc insiders filed 0 open-market purchases and 2 sales; 258 institutions reported holding it in 13F filings for Q2 2026, worth $1.37B in total; Fundsmith is the only superinvestor holding it.
Holders of 5% or more of NSSC
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Napco Security Technologies, Inc, largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| BlackRock, Inc. | 13G/A | 7.90%2.82M shares | – | Oct 17, 20251 filing | Oct 17, 2025 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
4 Schedule 13D and 13G filings on Napco Security Technologies, Inc, newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Mar 27, 202610:50 AM ET | Vanguard Group Inc | 13G/A | 0.00%0 shares | −7.76 ppfrom 7.76%Below 5% | Mar 13, 2026 | SEC |
| Oct 17, 20256:40 PM ET | BlackRock, Inc. | 13G/A | 7.90%2.82M shares | – | Sep 30, 2025 | SEC |
| May 12, 202510:36 AM ET | FMR LLCand 1 other | 13G/A | 3.00%1.09M shares | –Below 5% | Mar 31, 2025 | SEC |
| Jan 30, 20259:58 PM ET | Vanguard Group Inc | 13G/A | 7.76%2.85M shares | – | Dec 31, 2024 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Napco Security Technologies, Inc shares.
No Form 144 notices for Napco Security Technologies, Inc are on file.