Neil S. Subin - 22 Jun 2026 Form 4 Insider Report for NEXTNAV INC. (NN)

Reporting relationship: Director
Issuer ticker: NN
Reported as of: 22 Jun 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 24 Jun 2026, 20:10:14 UTC
Prior SEC filing: 26 May 2026
Source filing: View source filing
Reporting owner signature: /s/ James S. Black, by power of attorney

Key filing fact

Neil S. Subin filed Form 4 for NEXTNAV INC. (NN) on 24 Jun 2026.

Key facts

This page summarizes Neil S. Subin's Form 4 filing for NEXTNAV INC. (NN).
4 reported transactions and 2 derivative rows are listed below.
Accepted by SEC: 24 Jun 2026, 20:10.

Change

Previous filing in this sequence was filed on 26 May 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001201333 Primary reporting owner

SUBIN NEIL S

Relationship: Director
Address: 11911 FREEDOM DR., STE. 200, RESTON
Signature: /s/ James S. Black, by power of attorney
Signature date: 24 Jun 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

NN transaction

Common Stock

Conversion of derivative security

Transaction value
Shares: +502,707
Change %
Price: $0.000000^*
Shares after: 502,707
Date: 22 Jun 2026
Ownership: Persian Road I, LP
Footnotes: F1, F2, F3

NN transaction

Common Stock

Exercise of in-the-money or at-the-money derivative security

Transaction value
Shares: +250,000
Change %: +9.9%
Price: $11.50^*
Shares after: 2,765,213
Date: 23 Jun 2026
Ownership: MILFAM Investments LLC
Footnotes: F4, F5

NN holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 168,892
Date: 22 Jun 2026
Ownership: Direct
Footnotes: F8

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

NN transaction Derivative

5.00% Senior Secured Convertible Notes due 2028

Conversion of derivative security

Transaction value
Shares: -502,707
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 22 Jun 2026
Ownership: Persian Road I, LP
Underlying class: Common Stock
Underlying amount: 502,707
Exercise price: $12.56
Footnotes: F1, F2, F3

NN transaction Derivative

Warrants

Exercise of in-the-money or at-the-money derivative security

Transaction value
Shares: -250,000
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 23 Jun 2026
Ownership: MILFAM Investments LLC
Underlying class: Common Stock
Underlying amount: 250,000
Exercise price: $11.50
Footnotes: F4, F5, F6, F7

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 8 footnotes

Footnote F1

The Reporting Person is Manager of MILFAM LLC. MILFAM LLC is the manager of MILFAM GP LLC, the general partner of Persian Road I, LP, a limited partnership ("Persian Road").

Footnote F2

Pursuant to a Note Purchase Agreement with NextNav Inc. (the "Issuer"), dated March 12, 2025 (the "NPA"), Persian Road purchased $6,300,000 aggregate principal amount of the Issuer's 5.00% Senior Secured Convertible Notes due 2028 (the "2028 Notes"), at a price of 100% of the principal amount. The 2028 Notes are convertible, as of the date of issue on March 27, 2025, into the Issuer's shares of common stock, $0.0001 par value per share (the "Common Stock"), at a price of $12.56 per share. The 2028 Notes originally had a maturity date of June 30, 2028. On June 15, 2026, the Issuer elected to redeem all outstanding 2028 Notes pursuant to their terms, which accelerated the last date for their conversion to June 23, 2026. Persian Road converted the 2028 Notes prior to such redemption deadline. The Reporting Person disclaims any beneficial ownership of the reported securities other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

Footnote F3

The Reporting Person previously reported beneficial ownership of 2028 Notes representing the number of shares into which the principal amount was convertible. At the time of conversion, the 2028 Notes converted into 502,707 shares of Common Stock, consisting of 501,592 shares attributable to outstanding principal and the remaining shares attributable to accrued but unpaid interest. Accordingly, the number of shares of Common Stock acquired upon conversion exceeds the number of shares initially reported as underlying the 2028 Notes.

Footnote F4

The Reporting Person is the Manager of MILFAM LLC. MILFAM LLC is the manager of MILFAM Investments LLC ("MILFAM Investments"). The Reporting Person disclaims any beneficial ownership of the reported securities other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

Footnote F5

Represents the cash exercise of 250,000 warrants (the "Public Warrants") to purchase shares of the Issuer's Common Stock at an exercise price of $11.50 per share, pursuant to the terms of the Amended and Restated Warrant Agreement, dated as of October 28, 2021 (the "Warrant Agreement"), by and among Spartacus Acquisition Corporation, the Issuer, and Continental Stock Transfer & Trust Company, as warrant agent. MILFAM Investments paid the aggregate exercise price in cash and received 250,000 shares of Common Stock upon exercise. No separate consideration was received for the Public Warrants upon exercise.

Footnote F6

The Public Warrants became exercisable 30 days after the completion of the Issuer's initial business combination, which closed on October 28, 2021 (the "Business Combination").

Footnote F7

The Public Warrants originally had an expiration date five years after the completion of the Business Combination. On May 27, 2026, the Issuer announced that it elected to redeem all outstanding Public Warrants, and set a redemption date of June 26, 2026 (the "Redemption Date"). Holders of Public Warrants may exercise their Public Warrants for cash at the exercise price at any time prior to 5:00 p.m. New York City time on the Redemption Date, in accordance with the terms of the Warrant Agreement. MILFAM Investments exercised the Public Warrants prior to such redemption deadline.

Footnote F8

Includes 7,550 restricted shares, 100% of which will vest on May 1, 2027, subject to the Reporting Person's continued service through the applicable vesting date.