Company: RAIN
Filing Date: 2025-04-25
Form Type: 424B3
Source: 0001213900-25-035587
Chunk: 0

Company: Rain Enhancement Technologies Holdco, Inc.
Filing Date: 2025-04-25
Form: 424B3
Chunk 0
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Filed Pursuant to Rule 424(b)(3)

Registration No. 333-284614

PROSPECTUS

<div align='center'>Rain Enhancement Technologies Holdco, Inc.

5,000,000 Shares of Class A Common Stock Underlying Warrants (For Issuance)

5,914,057 Shares of Class A Common Stock (For Resale)</div>

This prospectus relates to the issuance by Rain Enhancement Technologies
Holdco, Inc. (“we”, “us”, “our”, “Holdco” and the “Company”) of 5,000,000
shares of Class A common stock, par value $0.0001 per share (the “Class A Common Stock”) of the Company upon the exercise
of 5,000,000 public warrants of the Company, with an exercise price of $11.50 per share (the “Warrants”).

This prospectus also relates to the resale from time to time by the
selling shareholders (including their transferees, donees, pledgees, and other successors-in-interest) named in this prospectus (the “selling
shareholders”) of up to 5,914,057 shares of Class A Common Stock. Such shares include: (i) 2,125,540 shares of Class A Common Stock
issued to the former shareholders of Rain Enhancement Technologies, Inc., a Massachusetts corporation (“RWT”), upon the closing
of the business combination (the “Business Combination”) among the Company, RWT, Coliseum Acquisition Corp., a Cayman Islands
exempted company (“Coliseum”), Rainwater Merger Sub 1, Inc., a Cayman Islands exempted company (“Merger Sub 1”),
and Rainwater Merger Sub 2A, Inc., a Massachusetts corporation (“Merger Sub 2”), as consideration for their shares of Class
A common stock of RWT pursuant to the terms of the Business Combination Agreement between the Company, RWT, Coliseum, Merger Sub 1, and
Merger Sub 2, dated as of June 25, 2024 (as amended on August 22, 2024, the “Business Combination Agreement”), and such shares
of RWT Class A common stock were originally purchased at an effective purchase price of approximately $2.06 per share; (ii) 57,752 shares
of Class A Common Stock issuable upon the conversion of 57,752 shares of Class B common stock, par value $0.000