X0508 4 2024-03-25 0001835814 Northern Star Investment Corp. IV NSTD 0001846621 Northern Star IV Sponsor LLC C/O GRAUBARD MILLER 405 LEXINGTON AVENUE, 44TH FLOOR NEW YORK NY 10174 0 0 1 0 0001008382 LEDECKY JONATHAN J C/O GRAUBARD MILLER 405 LEXINGTON AVENUE, 44TH FLOOR NEW YORK NY 10174 1 1 1 0 President, COO 0 Class A Common Stock 2024-03-25 4 C 0 58333 0 A 9766667 I by Northern Star III Sponsor LLC Class B Common Stock 0 2024-03-25 4 C 0 58333 0 D Class A Common Stock 58333 0 I by Northern Star IV Sponsor LLC The Class B Common Stock converts into Class A Common Stock upon the earlier of (1) request by the holder or (2) automatically at the time of the Issuer's initial business combination. Such conversion shall be on a one-for-one basis, subject to adjustment. The Class B Common Stock has no exercise or conversion price, nor expiration date. These shares are owned directly by Northern Star IV Sponsor LLC, a ten percent owner of the issuer, and indirectly by its managing members, Jonathan Ledecky, the Issuer's President and Chief Operating Officer and a director on its Board of Directors. Mr. Ledecky disclaims beneficial ownership of the securities held by Northern Star IV Sponsor LLC, except to the extent of his pecuniary interest therein. Northern Star IV Sponsor LLC, by Jonathan J. Ledecky, Managing Member 2024-03-27 /s/ Jonathan J. Ledecky 2024-03-27