BlackRock Inc. holds 5.35M NSSC shares (NSSC) — 15.0% stake reported

Rhea-AI Filing Summary

BlackRock, Inc. reported beneficial ownership of 5,350,443 shares of Common Stock of NAPCO SECURITY TECHNOLOGIES INC, representing 15.0% of the class as of 03/31/2026. The filing shows sole voting power for 5,288,755 shares and sole dispositive power for 5,350,443 shares. The schedule notes that iShares Core S&P Small-Cap ETF holds more than 5% on behalf of another person. The amendment is signed by Spencer Fleming, Managing Director, dated 04/07/2026.

Insights

Institutional Ownership Analyst

BlackRock holds a sizable 15.0% stake in NSSC, largely via sole dispositive authority.

BlackRock's report shows beneficial ownership of 5,350,443 shares and sole voting power over 5,288,755 shares as of 03/31/2026. This places the firm among the largest public holders by percentage.

Ownership disclosures are factual and administrative; subsequent trading activity will depend on BlackRock's trading desks and fund vehicles. Future filings could show changes if BlackRock adjusts positions or reattributes holdings among business units.

Corporate Governance Expert

Filing clarifies control metrics relevant to board and proxy considerations.

The schedule distinguishes voting power (5,288,755) and dispositive power (5,350,443), which matter for governance signaling and any coordination questions. The form also identifies an affiliated fund, iShares Core S&P Small-Cap ETF, as holding more than 5%.

These disclosures are routine for large asset managers; any governance implications depend on future engagement or voting patterns disclosed in subsequent filings.

Key Figures

Beneficial ownership: 5,350,443 shares Percent of class: 15.0% Sole voting power: 5,288,755 shares +3 more

6 metrics

Beneficial ownership 5,350,443 shares reported as beneficially owned as of 03/31/2026

Percent of class 15.0% percentage of common stock as reported

Sole voting power 5,288,755 shares shares for which BlackRock has sole voting power

Sole dispositive power 5,350,443 shares shares for which BlackRock has sole power to dispose

As-of date 03/31/2026 reporting date for ownership figures

Signature date 04/07/2026 date the amendment was signed by Spencer Fleming

Key Terms

beneficially owned, sole dispositive power, Schedule 13G/A

3 terms

beneficially owned regulatory

"this reflects the securities beneficially owned, or deemed to be beneficially owned"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

sole dispositive power regulatory

"Sole power to dispose or to direct the disposition of: 5350443"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

Schedule 13G/A regulatory

"This document is an amendment to a Schedule 13G/A"

A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 4)

NAPCO SECURITY TECHNOLOGIES INC

(Name of Issuer)

Common Stock

(Title of Class of Securities)

630402105

(CUSIP Number)

03/31/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 630402105

1

Names of Reporting Persons

BlackRock, Inc.

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 5,288,755.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 5,350,443.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

5,350,443.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

15.0 %

12

Type of Reporting Person (See Instructions)

HC

SCHEDULE 13G

Item 1.
(a)	Name of issuer: NAPCO SECURITY TECHNOLOGIES INC
(b)	Address of issuer's principal executive offices: 333 Bayview Ave Amityville NY 11701
Item 2.
(a)	Name of person filing: BlackRock, Inc. In accordance with SEC Release No. 34-39538 (January 12, 1998), this Schedule 13G reflects the securities beneficially owned, or deemed to be beneficially owned, by certain business units (collectively, the "Reporting Business Units") of BlackRock, Inc. and its subsidiaries and affiliates. It does not include securities, if any, beneficially owned by other business units whose beneficial ownership of securities are disaggregated from that of the Reporting Business Units in accordance with such release.
(b)	Address or principal business office or, if none, residence: BlackRock, Inc., 50 Hudson Yards New York, NY 10001
(c)	Citizenship: See Item 4 of Cover Page
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.:
Item 4.	Ownership
(a)	Amount beneficially owned: 5350443
(b)	Percent of class: 15.0 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 5288755
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 5350443
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. The interest of 1 such person, iShares Core S&P Small-Cap ETF, in the common stock of NAPCO SECURITY TECHNOLOGIES INC is more than five percent of the total outstanding common stock.
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary. See Exhibit 99
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

BlackRock, Inc.

Signature:	Spencer Fleming
Name/Title:	Managing Director
Date:	04/07/2026

Exhibit Information

Exhibit 24: Power of Attorney Exhibit 99: Item 7

FAQ

How many NSSC shares does BlackRock report owning?

BlackRock reports beneficial ownership of 5,350,443 shares of NSSC common stock, representing 15.0% of the class as of 03/31/2026. The filing lists sole dispositive power over those shares.

What voting power does BlackRock have in NSSC?

The amendment states BlackRock has sole voting power for 5,288,755 shares. That figure is reported separately from dispositive power and reflects the number of shares BlackRock can direct votes for.

Does the filing name any other large holders of NSSC?

Yes. The filing identifies iShares Core S&P Small-Cap ETF as having an interest exceeding 5% of NSSC common stock. The schedule explains certain holdings are reported on behalf of other business units.

Who signed the Schedule 13G/A amendment for BlackRock?

The filing is signed by Spencer Fleming, Managing Director, with a signature date of 04/07/2026. The cover lists the reporting business units and BlackRock's New York address.

What type of filing is this for NSSC?

This document is an amendment to a Schedule 13G/A, which reports passive or qualifying institutional ownership stakes. It amends prior ownership disclosures for BlackRock regarding NSSC common stock.