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Who owns Napco Security Technologies (NSSC) stock

238 funds reported Napco Security Technologies (NSSC) shares in their latest 13F filings, worth $1.5B in all. The largest holder is BlackRock ($214M). Last quarter 120 funds added to their stakes and 114 cut them.

Largest holders of NSSC (13F)Largest holders of NSSC (13F)BlackRock$214MVanguard Group$120MCopeland Capital Management, LLC$74.1MJupiter Topco LLC$63.9MVanguard Capital Management LLC$58.0MState Street$57.4MVanguard Portfolio Management LLC$56.8MJanus Henderson Group$56.1MFirst Trust Advisors LP$49.5MGeode Capital Management, LLC$45.5M

Largest holders (13F)

FundSharesValueChangeQuarter
BlackRock5,632,646$214Mdecrease2026-06-30
Vanguard Group2,882,063$120Mincrease2025-12-31
Copeland Capital Management, LLC2,081,286$74.1Mincrease2026-09-30
Jupiter Topco LLC1,682,208$63.9Mbase2026-06-30
Vanguard Capital Management LLC1,526,818$58.0Mincrease2026-06-30
State Street1,504,759$57.4Mincrease2026-06-30
Vanguard Portfolio Management LLC1,494,431$56.8Mincrease2026-06-30
Janus Henderson Group1,424,963$56.1Mdecrease2026-03-31
First Trust Advisors LP1,304,074$49.5Mincrease2026-06-30
Geode Capital Management, LLC1,196,951$45.5Mincrease2026-06-30
Wellington Management Group LLP1,102,280$41.9Mincrease2026-06-30
Morgan Stanley959,777$36.5Mincrease2026-06-30
Dimensional Fund Advisors LP725,550$27.6Mincrease2026-06-30
Arrowstreet Capital, Limited Partnership697,937$26.5Mdecrease2026-06-30
Doma Perpetual Capital Management LLC627,931$23.8Munchanged2026-06-30

Napco Security Technologies' latest quarter

Napco Security Technologies, Q1 FY27: revenue $50.0M (+2% year over year), operating margin 28.2%, net earnings $13.0M, operating cash flow $2.8M. The chart follows the revenue to costs, profit and cash.

Questions

Who owns the most NSSC stock?

By the latest 13F filings: BlackRock ($214M); Vanguard Group ($120M); Copeland Capital Management, LLC ($74.1M); Jupiter Topco LLC ($63.9M); Vanguard Capital Management LLC ($58.0M).

What is the short interest in NSSC?

2,476,551 shares were sold short at the 2026-10-15 settlement, 5.32% of the float.

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Updated Nov 8, 2026. Read automatically from SEC filings and public data; errors are possible. Not investment advice.