Napco Security Technologies, Inc. (NSSC) ownership: Top institutional holder: BlackRock, Inc. ($223.80M). Insider activity: Net Seller (2 buys, 18 sells). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| BlackRock, Inc. | 5681770.00 | $223.80M | 2026-03-31 |
| VANGUARD GROUP INC | 2882063.00 | $120.18M | 2025-12-31 |
| Copeland Capital Management, LLC | 2009089.00 | $79.14M | 2026-03-31 |
| Jupiter Topco LLC | 1682208.00 | $63.86M | 2026-06-30 |
| VANGUARD CAPITAL MANAGEMENT LLC | 1505177.00 | $59.29M | 2026-03-31 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 1464212.00 | $57.68M | 2026-03-31 |
| STATE STREET CORP | 1431503.00 | $56.52M | 2026-03-31 |
| JANUS HENDERSON GROUP PLC | 1424963.00 | $56.14M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-05-18 | |
| Sell | null | 2026-05-18 | |
| Sell | null | 2026-05-18 | |
| Sell | null | 2026-05-18 | |
| Sell | null | 2026-05-18 | |
| Sell | null | 2026-05-18 | |
| Sell | null | 2026-05-18 | |
| Sell | null | 2026-05-18 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.