Company: LIMN
Filing Date: 2025-02-07
Form Type: 424B3
Source: 0001104659-25-010605
Chunk: 0

Company: Liminatus Pharma, Inc.
Filing Date: 2025-02-07
Form: 424B3
Chunk 0
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TABLE OF CONTENTS

#### Filed pursuant to Rule 424(b)(3)​

#### Registration No. 333-275409​

### PROSPECTUS

#### IRIS PARENT HOLDING CORP.

### PROXY STATEMENT FORSPECIAL MEETING OF STOCKHOLDERS OFIRIS ACQUISITION CORP

#### PROSPECTUS FOR 17,674,477 SHARES OF COMMON STOCK,

#### 6,900,000 SHARES OF COMMON STOCK UNDERLYING

#### WARRANTS AND 6,900,000 WARRANTS OF

#### IRIS PARENT HOLDING CORP.
The board of directors (the “Iris Board”) of Iris Acquisition Corp, a Delaware corporation (formerly known as Tribe Capital Growth Corp I) (“we,” “us,” “our,” the “Company” or “Iris”), has unanimously approved the Business Combination (as defined herein) contemplated by the Business Combination Agreement (as defined herein) with Liminatus Pharma, LLC (“Liminatus”). As described in this proxy statement/prospectus, at the Special Meeting of Iris stockholders (the “Special Meeting”), our stockholders will be asked to consider and vote upon a proposal (the “Business Combination Proposal”) to approve the Business Combination and adopt the Business Combination Agreement.

Our stockholders will be asked to consider and vote upon the following proposals:

(a)

The Business Combination Proposal — To consider and vote upon a proposal to approve the Business Combination and adopt the Business Combination Agreement. A copy of the Business Combination Agreement is attached to this proxy statement/prospectus as Annex A (Proposal No. 1).

(b)

The Nasdaq Proposal — To consider and vote upon a proposal, as required by the rules of the Nasdaq Stock Market LLC, to approve the issuance of ParentCo (as defined herein) Common Stock in the Business Combination (including the PIPE Equity Investment (as defined herein)) in an amount greater than 20% of the number of shares of Iris common stock before such issuance (the “Nasdaq Proposal”) (Proposal No. 2).

(c)

The Incentive Plan Proposal — To approve and adopt the ParentCo 2025 Omnibus Equity Incentive Plan (an equity-based incentive plan), a copy of which is attached to this proxy statement/prospectus as Annex B (the “Incentive Plan Proposal”) (Proposal No. 3).

(d)

The ParentCo Charter Proposal — To consider and vote, on an advisory and non-binding basis, upon a proposal to approve Parent