Company: LIMN
Filing Date: 2025-01-16
Form Type: POS AM
Source: 0001104659-25-003835
Chunk: 0

Company: Liminatus Pharma, Inc.
Filing Date: 2025-01-16
Form: POS AM
Chunk 0
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TABLE OF CONTENTS

As filed with the Securities and Exchange Commission on January 15, 2025. Registration No. 333-275409 UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549 POST-EFFECTIVE AMENDMENT NO. 2 TO FORM S-4 REGISTRATION STATEMENT
UNDER
THE SECURITIES ACT OF 1933 IRIS PARENT HOLDING CORP.*
(Exact name of registrant as specified in its charter)

| ​ | Delaware                                                       
 (State or other jurisdiction of incorporation or organization) | ​ | ​ | 6770                                                    
 (Primary Standard IndustrialClassification Code Number) | ​ | ​ | 93-2710748                           
 (I.R.S. Employer Identification No.) | ​ |

6 Centerpointe Drive #625,
La Palma, California 90623
Tel: (213) 273-5453 (Address, including zip code, and telephone number, including area code, of registrant’s principal executive offices) Iris Parent Holding Corp.
6 Centerpointe Drive #625,
La Palma, California 90623
Attn: Chris Kim, Chief Executive Officer
Tel: (213) 273-5453 (Name, address, including zip code, and telephone number, including area code, of agent for service) Copies to:

| ​ | Chauncey M. LaneHolland & Knight LLPOne Arts Plaza1722 Routh Street, Suite 1500Dallas, Texas 75201Tel: (214) 969-1278 | ​ | ​ | Mitchell S. NussbaumGiovanni CarusoLoeb & Loeb LLP345 Park AvenueNew York, New York 10154Tel: (212) 407-4990 | ​ |

Approximate date of commencement of proposed sale of the securities to the public: As soon as practicable after this Registration Statement becomes effective and after all conditions under the Business Combination Agreement to consummate the proposed Business Combination are satisfied or waived. If the securities being registered on this Form are being offered in connection with the formation of a holding company and there is compliance with General Instruction G, check the following box. ☐ If this Form is filed to registered additional securities for an offering pursuant to Rule 462(b) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐ If this Form is a post-effective amendment filed pursuant to Rule