SEC Form 3 · accession 0000921895-26-002500
Rainier Acquisition Corp · RNAQ
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owners
683 Capital Partners, LP
10% Owner
683 Capital Management, LLC
10% Owner
Ari Zweiman
10% Owner
Period of report
Aug 27, 2026
Accepted (ET)
Sep 8, 2026 · 3:58 pm EDT
Rule 10b5-1 plan
unknown — predates the checkbox
Issuer CIK
0002147219
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Class A Ordinary Shares, $0.0001 Par ValueF1,F2 | holding | — | — | — | 862,500 | I | By 683 Capital Partners, LP |
Table II — derivative securities
| Security | Conv. / exercise price | Date | Code | Shares | A/D | Exercisable | Expires | Underlying | Underlying shares | Owned after | D/I |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Redeemable warrantsF1,F2,F4,F5,F3 | $11.50 | holding | — | — | — | — | — | Class A Ordinary Shares | 215,625 | — | I |
Explanation of responses
- F1This Form 3 is filed jointly by 683 Capital Management, LLC ("683 Management"), 683 Capital Partners, LP ("683 Partners") and Ari Zweiman (collectively, the "Reporting Persons"). Each of the Reporting Persons may be deemed to be a member of a Section 13(d) group that collectively owns more than 10% of the Class A Ordinary Shares, $0.0001 par value per share, of Rainier Acquisition Corporation (the "Issuer"). Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of his or its pecuniary interest therein.
- F2Represents securities held directly by 683 Partners. 683 Management is the investment manager of 683 Partners. Ari Zweiman is the Managing Member of 683 Management. As a result, each of 683 Management and Ari Zweiman may be deemed to beneficially own the securities held by 683 Partners.
- F3Each warrant will become exercisable on the later of (i) one year following the Issuer's initial public offering and (ii) the completion by the Issuer of any merger, share exchange, asset acquisition, share purchase, reorganization or similar business combination, involving the Issuer and one or more businesses (a "Business Combination"), and expire five years after the completion of the initial Business Combination, or earlier upon redemption or liquidation.
- F4Exercise price is subject to adjustment in accordance with its terms.
- F5The reported securities are included within 862,500 Units of the Issuer purchased by the Reporting Persons at $10.00 per Unit. Each Unit consists of one Class A ordinary share, $0.0001 par value per share, and one-quarter of one redeemable warrant, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50 per share, subject to adjustment.