Exhibit 5.1

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Hogan Lovells US LLP
8350 Broad Street, 17th Floor
Tysons, VA 22102
T +1 703 610 6100
F +1 703 610 6200
www.hoganlovells.com
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March 12, 2025
Board of Directors
NextNav Inc.
11911 Freedom Dr. Ste. 200
Reston, Virginia 20190
Ladies and Gentlemen:
We are acting as counsel to NextNav Inc., a Delaware corporation (the “Company”), in connection with its registration statement on Form S‑8 (the “Registration Statement”), filed with the Securities and Exchange Commission under the Securities Act of 1933, as amended (the “Act”), relating to the proposed offering of up to an aggregate of 5,836,259 shares (the “Shares”) of common stock, par value $0.0001 per share, of the Company (the “Common Stock”) consisting of the following: (i) 5,636,259 shares of Common Stock issuable pursuant to the NextNav Inc. 2021 Omnibus Incentive Plan (the “Incentive Plan”); and (ii) 200,000 shares of Common Stock issuable pursuant to the NextNav Inc. 2021 Employee Stock Purchase Plan (the “ESPP”). This opinion letter is furnished to you at your request to enable you to fulfill the requirements of Item 601(b)(5) of Regulation S‑K, 17 C.F.R. § 229.601(b)(5), in connection with the Registration Statement.
For purposes of this opinion letter, we have examined copies of such agreements, instruments and documents as we have deemed an appropriate basis on which to render the opinions hereinafter expressed. In our examination of the aforesaid documents, we have assumed the genuineness of all signatures, the legal capacity of all natural persons, the accuracy and completeness of all documents submitted to us, the authenticity of all original documents, and the conformity to authentic original documents of all documents submitted to us as copies (including pdfs). As to all matters of fact, we have relied on the representations and statements of fact made in the documents so reviewed, and we have not independently established the facts so relied on. This opinion letter is given, and all statements herein are made, in the context of the foregoing.
This opinion letter is based as to matters of law solely on the Delaware General Corporation Law, as amended. We express no opinion herein as to any other statutes, rules or regulations.
Based upon, subject to and limited by the foregoing, we are of the opinion that following (i) effectiveness of the Registration Statement, (ii) issuance of the Shares pursuant to the terms of the Incentive Plan and ESPP, as applicable, and (iii) receipt by the Company of the consideration for the Shares specified in the applicable resolutions of the Board of Directors (or a duly authorized committee thereof) and in the Incentive Plan and ESPP, as applicable, the Shares that constitute original issuances by the Company will be validly issued, fully paid, and nonassessable.
Hogan Lovells US LLP is a limited liability
partnership registered in the state of Delaware. “Hogan Lovells” is an international legal
practice that includes Hogan Lovells US LLP and Hogan Lovells International
LLP, with offices in: Alicante Amsterdam
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Jakarta Shanghai FTZ. Business Service Centers: Johannesburg
Louisville. For more information
see www.hoganlovells.com
This opinion letter has been prepared for use in connection with the Registration Statement. We assume no obligation to advise of any changes in the foregoing subsequent to the effective date of the Registration Statement.
We hereby consent to the filing of this opinion letter as Exhibit 5.1 to the Registration Statement. In giving this consent, we do not thereby admit that we are an “expert” within the meaning of the Act.
Very truly yours,
/s/ Hogan Lovells US LLP |
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HOGAN LOVELLS US LLP |