Quantum Space, LLC

Exhibit 4.5 WARRANT ASSUMPTION AGREEMENT This Warrant Assumption Agreement (as may be amended, supplemented, modified or varied in accordance with the terms herein, this “ Agreement ”), dated [●], 2026, is made by and among Inflection Point Acquisition Corp. VI, a Cayman Islands exempted company (the “ Company ”), IPFX PubCo, Inc., a Delaware corporation (“ PubCo ”), and Continental Stock Transfer & Trust Company, a New York corporation, as warrant agent (in such capacity, the “ Warrant Agent …

S-4 · 2026-10-05 · 0001213900-26-106599

Exhibit 4.6 SPECIMEN CLASS A-1 COMMON STOCK CERTIFICATE Number ___ QUANTUM SPACE, INC. Incorporated Under the Laws of the State of Delaware CLASS A-1 COMMON STOCK CUSIP [____] This certifies that ____ is the owner of ____ fully paid and non-assessable shares of Class A-1 common stock, par value $0.0001 per share (the “Class A-1 Common Stock”), of Quantum Space, Inc., a Delaware corporation (the “Company”), transferable on the books of the Company in person or by duly authorized attorney u…

S-4 · 2026-10-05 · 0001213900-26-106599

Exhibit 4.7 EXHIBIT B [Form of Warrant Certificate] [FACE] Number Warrant THIS WARRANT SHALL BE VOID IF NOT EXERCISED PRIOR TO THE EXPIRATION OF THE EXERCISE PERIOD PROVIDED FOR IN THE WARRANT AGREEMENT DESCRIBED BELOW QUANTUM SPACE, INC Incorporated Under the Laws of the State of Delaware CUSIP [_________] Warrant Certificate This Warrant Certificate certifies that [_________], or registered assigns, is the registered holder of warrants evidenced hereby (the “Warrants” and each, a “Wa…

S-4 · 2026-10-05 · 0001213900-26-106599

Exhibit 4.9 Execution Version WARRANT THIS WARRANT AND THE SECURITIES ISSUABLE UPON EXERCISE OF THIS WARRANT HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “ACT”), OR QUALIFIED UNDER ANY STATE OR FOREIGN SECURITIES LAWS AND MAY NOT BE OFFERED FOR SALE, SOLD, PLEDGED, HYPOTHECATED, OR OTHERWISE TRANSFERRED OR ASSIGNED UNLESS (I) A REGISTRATION STATEMENT COVERING SUCH UNITS IS EFFECTIVE UNDER THE ACT AND IS QUALIFIED UNDER APPLICABLE STATE AND FOREIGN LAW OR (II) THE…

S-4 · 2026-10-05 · 0001213900-26-106599

Exhibit 99.1 CONSENT OF NEWBRIDGE SECURITIES CORPORATION Newbridge Securities Corporation (“Newbridge”) hereby consents to (i) the filing of our fairness opinion dated June 6th, 2026 (the “Opinion”) to the Board of Directors of Inflection Point Acquisition Corp. VI (“IPFX”), as an Annex to the proxy statement/prospectus included in this Registration Statement on Form S-4, and any supplements and amendments thereto, (ii) the references therein to Newbridge and (iii) the inclusion therein of (a)…

S-4 · 2026-10-05 · 0001213900-26-106599

Exhibit 99.2 CONSENT OF PROSPECTIVE DIRECTOR In accordance with Rule 438 promulgated under the Securities Act of 1933, as amended, I hereby consent to my being named in the registration statement on Form S-4 filed with the SEC by IPFX PubCo, Inc. and Quantum Space, LLC (the “Co-Registrants”), as it may be amended or supplemented from time to time (the “Registration Statement”), to which this consent is an exhibit, as a person who is to become a director of each of the Co-Registrants upon consu…

S-4 · 2026-10-05 · 0001213900-26-106599