X0609 4 2026-06-17 0001865631 NEXTNAV INC. NN 0002024043 Foundation Holdco LP false 1345 AVENUE OF THE AMERICAS, 46TH FLOOR NEW YORK NY 10105 0 0 1 0 0002024041 FIG Parent, LLC false 1345 AVENUE OF THE AMERICAS, 46TH FLOOR NEW YORK NY 10105 0 0 1 0 0002024235 FINCO I LLC false 1345 AVENUE OF THE AMERICAS, 46TH FLOOR NEW YORK NY 10105 0 0 1 0 0002024037 FINCO I Intermediate Holdco LLC false 1345 AVENUE OF THE AMERICAS, 46TH FLOOR NEW YORK NY 10105 0 0 1 0 0001891184 CF NNAV-E LLC false 1345 AVENUE OF THE AMERICAS, 46TH FLOOR NEW YORK NY 10105 0 0 1 0 0001893282 FCOF V UST LLC false 1345 AVENUE OF THE AMERICAS, 46TH FLOOR NEW YORK NY 10105 0 0 1 0 0 Common stock, par value $0.0001 per share 2026-06-17 4 C 0 3989738 12.56 A 3989738 I See Footnotes Common stock, par value $0.0001 per share 2500000 I See Footnotes Common stock, par value $0.0001 per share 11678054 I See Footnotes 5.00% Senior Secured Convertible Notes due 2028 12.56 2026-06-17 4 C 0 50000000 0 D 2028-06-30 Common Stock 3989738 0 I See Footnotes The 5.00% Senior Secured Notes due 2028 (the "Convertible Notes") are convertible at any time into a number of shares of Common Stock equal to (i) the sum of the then-outstanding principal amount of the Convertible Notes to be converted plus all accrued and unpaid interest to the date of the conversion divided by (ii) $12.56, subject to the terms of the Note Purchase Agreement. Held directly by CF NNAV-CNV LLC ("CF NNAV-CNV"). FCOF V UL Investments LLC, a Delaware limited liability company ("FCOF V UL"), is the majority member of CF NNAV-CNV. Fortress Credit Opportunities Fund V(A) L.P., a Cayman limited partnership ("FCOF V(A)"), FCOF V B Investments LLC, a Delaware limited liability company, FCOF V CDG Investments LLC, a Delaware limited liability company ("FCOF V CDG Investments"), and Fortress Credit Opportunities Fund V(E) L.P., a Delaware limited partnership ("FCOF V(E)") collectively hold a 100% interest in FCOF V UL. FCO Fund V GP LLC, a Delaware limited liability company ("FCO Fund V GP") is the general partner of FCOF V(A), Fortress Credit Opportunities Fund V(B) L.P., a Cayman limited partnership ("FCOF V(B)"), Fortress Credit Opportunities Fund V(C) L.P., a Cayman limited partnership ("FCOF V(C)"), Fortress Credit Opportunities Fund V(D) L.P., a Cayman limited partnership ("FCOF V(D)"), FCOF V(E) and Fortress Credit Opportunities Fund V(G) L.P., a Cayman limited partnership ("FCOF V(G)"). Fortress Credit Opportunities V Advisors LLC, a Delaware limited liability company ("FCO V Advisors"), is the investment advisor of FCOF V(A), FCOF V(B), FCOF V(D), FCOF V(E) and FCOF V(G). Fortress Credit Opportunities V-C Advisors LLC, a Delaware limited liability company ("FCO V-C Advisors") is the investment advisor of FCOF V(C). FIG LLC, a Delaware limited liability company ("FIG") holds all of the interests in FCO V Advisors and FCO V-C Advisors. Hybrid GP Holdings (Cayman) LLC, a Delaware limited liability company ("Hybrid GP Holdings (Cayman)") holds all of the interests in FCO Fund V GP. Hybrid GP Holdings LLC, a Delaware limited liability company ("Hybrid GP Holdings") holds all of the interests in Hybrid GP Holdings (Cayman). Fortress Operating Entity I LP, a Delaware limited partnership ("FOE I"), is the managing member of Hybrid GP Holdings, and the owner of all of the issued and outstanding interests of FIG. FIG Blue LLC, a Delaware limited liability company ("FIG Blue"), is the general partner of FOE I. FIG Blue is wholly owned by Fortress Investment Group LLC, a Delaware limited liability company ("Fortress Investment Group"). FINCO I Intermediate Holdco LLC, a Delaware limited liability company ("FINCO I IH"), is the sole member of Fortress Investment Group. FINCO I LLC, a Delaware limited liability company, is the sole member of FINCO I IH. FIG Parent, LLC, a Delaware limited liability company ("FIG Parent"), is the sole member of FINCO I LLC. Foundation Holdco LP, a Delaware limited partnership ("Foundation Holdco"), is the sole member of FIG Parent. FIG Buyer GP, LLC, a Delaware limited liability company is the general partner of Foundation Holdco. Held directly by CF NNAV-P LLC ("CF NNAV-P"). FCOF V UB Investments L.P., a Cayman Islands limited partnership ("FCOF V UB"), is the majority member of CF NNAV-P. FCOF V(A), FCOF V(B), FCOF V(C), FCOF V(D), FCOF V(E) and FCOF V(G), collectively hold a 100% interest in FCOF V UB. Held directly by CF NNAV-E LLC ("CF NNAV-E"). FCOF V UST LLC, a Delaware limited liability company ("FCOF V UST") is the majority member of CF NNAV-E. FCOF V CDG Investments is the majority member of FCOF V UST. FCOF V(G) is the majority member of FCOF V CDG Investments. Each reporting person disclaims beneficial ownership of all reported securities except to the extent of its pecuniary interest therein and the inclusion of the securities in this report shall not be deemed to be an admission of beneficial ownership of the reported shares for the purposes of Section 16 or otherwise. This Form 4 is one of two reports relating to the same transactions being filed jointly by FIG Buyer GP, LLC, Fortress Investment Group LLC, Hybrid GP Holdings LLC, Hybrid GP Holdings (Cayman) LLC, Fortress Operating Entity I L.P., FIG Blue LLC, FIG LLC, FCOF V CDG Investments LLC, FCO Fund V GP LLC, Fortress Credit Opportunities V Advisors LLC, Foundation Holdco LP, FIG Parent, LLC, FINCO I LLC, FINCO I Intermediate Holdco LLC, CF NNAV-E LLC and FCOF V UST LLC. /s/ David N. Brooks - for Foundation Holdco LP, By: FIG Buyer GP, LLC, its general partner, By: David N. Brooks, its Secretary 2026-06-22 /s/ David N. Brooks - for FIG Parent, LLC, By: David N. Brooks, its Secretary 2026-06-22 /s/ David N. Brooks - for FINCO I LLC, By: David N. Brooks, its Secretary 2026-06-22 /s/ David N. Brooks - for FINCO I Intermediate Holdco LLC, By: David N. Brooks, its Secretary 2026-06-22 /s/ David N. Brooks - for CF NNAV-E LLC, By: David N. Brooks, its Secretary 2026-06-22 /s/ David N. Brooks - for FCOF V UST LLC, By: David N. Brooks, its Secretary 2026-06-22