NAPCO SECURITY TECHNOLOGIES (NSSC) Institutional Shareholders
NAPCO SECURITY TECHNOLOGIES (NSSC) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $1.34B in NSSC holdings during the latest filing period.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of NSSC tracked by InsiderSet, reporting ownership valued at approximately $213.93M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $214.55M, representing an estimated gain of +0.29% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 52% of the total disclosed NSSC value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Copeland Capital Management, Llc, Vanguard Capital Management Llc, and several other long-term asset managers with concentrated positions in NAPCO SECURITY TECHNOLOGIES (NSSC).
This page ranks the largest institutional NSSC shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
258
Total Reported Value
$1.34B
Largest Holder
Blackrock, Inc.
Largest Position
$213.93M
Insider Transactions (90d)
0
Latest Filing Quarter
Q2 2026
New Institutional Positions
53
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.00% | 5,632,646 | $213,927,882 | $214,547,486 | +$619,604 | +0.29% | |
| Copeland Capital Management, Llc | 1.57% | 2,016,873 | $76,600,869 | $76,822,693 | +$221,824 | +0.29% | |
| Vanguard Capital Management Llc | 0.00% | 1,526,818 | $57,988,548 | $58,156,498 | +$167,950 | +0.29% | |
| State Street Corp | 0.00% | 1,504,759 | $57,365,807 | $57,316,270 | -$49,537 | -0.09% | |
| Vanguard Portfolio Management Llc | 0.00% | 1,494,431 | $56,758,489 | $56,922,877 | +$164,388 | +0.29% | |
| Janus Henderson Group Plc | 0.03% | 1,424,963 | $56,142,729 | $54,276,841 | -$1,865,888 | -3.32% | |
| First Trust Advisors Lp | 0.03% | 1,304,074 | $49,528,730 | $49,672,179 | +$143,449 | +0.29% | |
| Geode Capital Management, Llc | 0.00% | 1,196,951 | $45,467,034 | $45,591,864 | +$124,830 | +0.27% | |
| Wellington Management Group Llp | 0.01% | 1,102,280 | $41,864,595 | $41,985,845 | +$121,250 | +0.29% | |
| Morgan Stanley | 0.00% | 959,777 | $36,452,347 | $36,557,906 | +$105,559 | +0.29% | |
| Dimensional Fund Advisors Lp | 0.00% | 725,550 | $27,555,025 | $27,636,200 | +$81,175 | +0.29% | |
| Arrowstreet Capital, Limited Partnership | 0.01% | 697,937 | $26,507,647 | $26,584,420 | +$76,773 | +0.29% | |
| Doma Perpetual Capital Management Llc | 5.54% | 627,931 | $23,848,819 | $23,917,892 | +$69,073 | +0.29% | |
| Northern Trust Corp | 0.00% | 610,616 | $23,191,196 | $23,258,363 | +$67,167 | +0.29% | |
| Fundsmith | Terry Smith | 0.17% | 606,974 | $23,052,873 | $23,119,640 | +$66,767 | +0.29% |
| Deprince Race & Zollo Inc | 0.26% | 408,632 | $15,519,843 | $15,564,793 | +$44,950 | +0.29% | |
| Royal Bank Of Canada | 0.00% | 406,408 | $15,435,000 | $15,480,081 | +$45,081 | +0.29% | |
| Renaissance Technologies LLC | Jim Simons | 0.02% | 406,200 | $15,427,476 | $15,472,158 | +$44,682 | +0.29% |
| Point72 Asset Management, L.P. | 0.02% | 379,686 | $14,420,474 | $14,462,240 | +$41,766 | +0.29% | |
| Envestnet Asset Management Inc | 0.00% | 378,803 | $14,386,927 | $14,428,606 | +$41,679 | +0.29% | |
| Goldman Sachs Group Inc | 0.00% | 369,290 | $14,025,653 | $14,066,256 | +$40,603 | +0.29% | |
| Charles Schwab Investment Management Inc | 0.00% | 354,531 | $13,465,087 | $13,504,086 | +$38,999 | +0.29% | |
| Sixth Street Partners Management Company, L.P. | 0.00% | 354,531 | $13,465,087 | $13,504,086 | +$38,999 | +0.29% | |
| Bank Of New York Mellon Corp | 0.00% | 311,009 | $11,812,134 | $11,846,333 | +$34,199 | +0.29% | |
| Aqr Capital Management Llc | 0.00% | 295,923 | $11,239,166 | $11,271,707 | +$32,541 | +0.29% | |
| Congress Asset Management Co | 0.07% | 285,462 | $10,841,859 | $10,873,248 | +$31,389 | +0.29% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.00% | 272,027 | $10,715,144 | $10,361,508 | -$353,636 | -3.30% | |
| Captrust Financial Advisors | 0.02% | 278,678 | $10,584,178 | $10,614,845 | +$30,667 | +0.29% | |
| Federated Hermes, Inc. | 0.02% | 277,694 | $10,546,817 | $10,577,364 | +$30,547 | +0.29% | |
| Prudential Financial Inc | 0.01% | 274,820 | $10,437,664 | $10,467,894 | +$30,230 | +0.29% | |
| Los Angeles Capital Management Llc | 0.04% | 274,050 | $10,408,417 | $10,438,565 | +$30,148 | +0.29% | |
| Granite Investment Partners, Llc | 0.52% | 266,069 | $10,105,301 | $10,134,568 | +$29,267 | +0.29% | |
| Visionary Wealth Advisors | 0.39% | 262,368 | $9,964,737 | $9,993,597 | +$28,860 | +0.29% | |
| Trexquant Investment Lp | 0.06% | 261,334 | $9,925,465 | $9,954,212 | +$28,747 | +0.29% | |
| Russell Investments Group, Ltd. | 0.01% | 256,442 | $9,739,694 | $9,767,876 | +$28,182 | +0.29% | |
| Nuveen, Llc | 0.00% | 255,569 | $9,706,512 | $9,734,623 | +$28,111 | +0.29% | |
| Vanguard Fiduciary Trust Co | 0.00% | 254,169 | $9,653,339 | $9,681,297 | +$27,958 | +0.29% | |
| Wasatch Advisors Lp | 0.06% | 242,585 | $9,213,378 | $9,240,063 | +$26,685 | +0.29% | |
| Principal Financial Group Inc | 0.00% | 230,017 | $8,736,046 | $8,761,348 | +$25,302 | +0.29% | |
| Healthcare Of Ontario Pension Plan Trust Fund | 0.01% | 224,298 | $8,518,838 | $8,543,511 | +$24,673 | +0.29% | |
| Crawford Investment Counsel Inc | 0.14% | 223,794 | $8,499,696 | $8,524,313 | +$24,617 | +0.29% | |
| Jpmorgan Chase & Co | 0.00% | 214,871 | $8,072,429 | $8,184,436 | +$112,007 | +1.39% | |
| Jacobs Levy Equity Management, Inc | 0.03% | 201,670 | $7,659,427 | $7,681,610 | +$22,183 | +0.29% | |
| Invesco Ltd. | 0.00% | 190,854 | $7,248,634 | $7,269,629 | +$20,995 | +0.29% | |
| New York State Common Retirement Fund | 0.01% | 186,274 | $7,074,687 | $7,095,177 | +$20,490 | +0.29% | |
| Gamco Investors, Inc. Et Al | 0.06% | 178,900 | $6,794,622 | $6,814,301 | +$19,679 | +0.29% | |
| Rockefeller Capital Management L.P. | 0.01% | 178,187 | $6,787,783 | $6,787,143 | -$640 | -0.01% | |
| Two Sigma Investments, Lp | 0.00% | 172,667 | $6,557,893 | $6,576,886 | +$18,993 | +0.29% | |
| Sg Capital Management Llc | 0.59% | 170,793 | $6,486,718 | $6,505,505 | +$18,787 | +0.29% | |
| Kornitzer Capital Management Inc | 0.13% | 168,717 | $6,407,872 | $6,426,431 | +$18,559 | +0.29% |
Frequently asked questions about NSSC
Who owns the most NSSC stock?
The largest holders of NSSC are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for NAPCO SECURITY TECHNOLOGIES (NSSC).
Is NSSC widely held by superinvestors?
Many widely followed stocks like NSSC appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly NSSC is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.