X0306 4 2023-03-03 0001835817 Northern Star Investment Corp. III NSTC 0001846619 Northern Star III 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 0001699323 Coles Joanna C/O GRAUBARD MILLER 405 LEXINGTON AVENUE, 44TH FLOOR NEW YORK NY 10174 1 1 1 0 Chief Executive Officer Class A Common Stock 2023-03-03 4 C 0 9708334 0 A 9708334 I by Northern Star III Sponsor LLC Class B Common Stock 0 2023-03-03 4 C 0 9708334 0 D Class A Common Stock 9708334 0 I by Northern Star III Sponsor LLC The Class B Common Stock will convert 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 III 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, and Joanna Coles, the Issuer's Chief Executive Officer and a director on and Chairperson of its Board of Directors. Each of Mr. Ledecky and Ms. Coles disclaim beneficial ownership of the securities held by Northern Star III Sponsor LLC, except to the extent of his/her pecuniary interest therein. Northern Star III Sponsor LLC, by Jonathan J. Ledecky, Managing Member 2023-03-07 /s/ Jonathan J. Ledecky 2023-03-07 /s/ Joanna Coles 2023-03-07