# EDGAR Filing Document

**Accession Number:** 0001971387
**File Stem:** 0001104659-25-078577
**Filing Date:** 2025-8
**Character Count:** 8716
**Document Hash:** 8695444a9cbedb371eb59a8a93a7ec7a
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001104659-25-078577.hdr.sgml**: 20250814

**ACCESSION NUMBER**: 0001104659-25-078577

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 14

**CONFORMED PERIOD OF REPORT**: 20250814

**ITEM INFORMATION**: Regulation FD Disclosure

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20250814

**DATE AS OF CHANGE**: 20250814

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Liminatus Pharma, Inc.
- **CENTRAL INDEX KEY:** 0001971387
- **STANDARD INDUSTRIAL CLASSIFICATION:** BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
- **ORGANIZATION NAME:** 03 Life Sciences
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-42626
- **FILM NUMBER:** 251218837

**BUSINESS ADDRESS:**
- **STREET 1:** 6 CENTERPOINTE DR.
- **STREET 2:** #625
- **CITY:** LA PALMA
- **STATE:** CA
- **ZIP:** 90623
- **BUSINESS PHONE:** 213-273-5453

**MAIL ADDRESS:**
- **STREET 1:** 6 CENTERPOINTE DR.
- **STREET 2:** #625
- **CITY:** LA PALMA
- **STATE:** CA
- **ZIP:** 90623

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Iris Parent Holding Corp.
- **DATE OF NAME CHANGE:** 20230328

?xml version='1.0' encoding='ASCII'?

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C. 20549**

**FORM 8-K**

**CURRENT REPORT**

**Pursuant to Section 13 or 15(d) of the**

**Securities Exchange Act of 1934**

**August 14, 2025**

Date of Report (Date of earliest event reported)

---

| |
|:---|
| **LIMINATUS PHARMA, INC.** |
| (Exact Name of Registrant as Specified in its Charter) |

---

---

| | | |
|:---|:---|:---|
| **Delaware** | **001-42626** | **93-2710748** |
| (State or other jurisdiction | (Commission | (I.R.S. Employer |
| of incorporation) | File Number) | Identification No.) |

---

---

| | |
|:---|:---|
| **6 Centerpointe Drive #625, La Palma, CA** | **90623** |
| (Address of Principal Executive Offices) | (Zip Code) |

---

Registrant's telephone number, including area code: **(213) 273-5453**

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

---

| |
|:---|
| Written communications pursuant to Rule 425 under the Securities Act |
| Soliciting material pursuant to Rule 14a-12 under the Exchange Act |
| Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act |
| Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act |

---

Securities registered pursuant to Section 12(b) of the Act:

---

| | | |
|:---|:---|:---|
| **Title of each class** | **Trading Symbol(s)** | **Name of each exchange on which registered** |
| Common Stock | LIMN | The Nasdaq Stock Market LLC |
| Warrants | LIMNW | The Nasdaq Stock Market LLC |

---

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2).

Emerging growth company ⌧

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ◻

**Item 7.01 Regulation FD Disclosure.**

On August 14, 2025, Liminatus Pharma, Inc. (the "Company") provided an update on the development of IBA101, the Company's CD47 checkpoint inhibitor immuno-oncology therapy. A copy of the update is furnished as Exhibit 99.1 and is incorporated by reference herein.

The information in Item 7.01 (including Exhibit 99.1) are "furnished" and shall not be deemed to be "filed" for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or otherwise subject to the liability of such section nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing.

The Company does not have, and expressly disclaims, any obligation to release publicly any updates or any changes in the Company's expectations or any change in events, conditions, or circumstances on which any forward-looking statement is based, except as required by law.

**Item 9.01 Financial Statements and Exhibits.**

---

| | |
|:---|:---|
| **Exhibit No.** | **Description** |
| [99.1](tm2523534d1_ex99-1.htm) | [Update on Research Development Program](tm2523534d1_ex99-1.htm) |
| 104 | Cover Page Interactive Data File (formatted as Inline XBRL) |

---

**SIGNATURES**

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

---

| | | |
|:---|:---|:---|
| Dated: August 14, 2025 |  |  |
|  | LIMINATUS PHARMA, INC. | LIMINATUS PHARMA, INC. |
|  | By: | /s/ Chris Kim |
|  | Name: | Chris Kim |
|  | Title: | Chief Executive Officer |

---

## Exhibit 99.1

**Exhibit 99.1**

**IBA101: The Strategic Answer to the PD-1/L1 Patent Cliff**

Liminatus Pharma, Inc. (the "Company") believes that the immuno-oncology landscape is approaching a critical inflection point. Since their first approval in 2014, PD-1/PD-L1 inhibitors such as Keytruda (Merck) and Opdivo (Bristol Myers Squibb) have rapidly become standard-of-care therapies across numerous cancer indications. However, with **key patents set to expire by 2028–2030**, this therapeutic class is now facing the classic life-cycle challenge of every blockbuster: the looming entry of biosimilars.

As the table below summarizes, multiple PD-1/L1 inhibitors will lose exclusivity in the coming years:

---

| | | |
|:---|:---|:---|
| **Drug** | **Company** | **U.S. Patent Expiry (Est.)** |
| Keytruda (pembrolizumab) | Merck & Co. | 2028 (core patent), up to 2036 (formulations) |
| Opdivo (nivolumab) | BMS | 2028 |
| Tecentriq (atezolizumab) | Roche | 2029 |
| Imfinzi (durvalumab) | AstraZeneca | 2030 |
| Libtayo (cemiplimab) | Regeneron/Sanofi | 2030 |

---

Biosimilar competition will inevitably lead to pricing pressure and revenue decline. In response, leading pharmaceutical companies are actively pursuing strategies to **extend commercial exclusivity**, such as:

&nbsp;&nbsp;&nbsp;&nbsp;· Developing subcutaneous (s.c.) formulations

· Launching new indications through **combination therapies with novel immune-oncology agents** 

However, while many combinations have been explored—including IDO1, CSF-1R, and even LAG-3 blockers—none have yet delivered breakthrough efficacy or commercial viability that reinvigorates the PD-1/L1 class.

*IBA101: Synergy Through Innate Immune Activation*

Liminatus Pharma's IBA101 presents a unique strategic opportunity in this evolving landscape. As a next-generation CD47 monoclonal antibody, IBA101 has been engineered to avoid binding to red blood cells and platelets, thereby eliminating the severe cytopenia issues that derailed earlier CD47 programs such as Hu5F9 and lemzoparlimab.

More importantly, IBA101 activates innate immune responses, particularly macrophage-mediated phagocytosis. This innate activation primes and amplifies adaptive immunity, making it a rational and potent partner for PD-1/PD-L1 inhibitors, which act downstream by releasing T cells from checkpoint inhibition.

Preclinical data suggest that the IBA101 + anti–PD-1 combination produces a synergistic anti-tumor response, with a favorable safety profile. If this synergy is confirmed in clinical trials, it offers an elegant path for pharma companies to extend the life cycle of their PD-1/PD-L1 franchises: by launching a new combination indication covered under a fresh IP portfolio, the loss of exclusivity on the original monotherapy may be offset.

*A Rare Asset in a Crowded Race*

The Company believes that the CD47 space remains one of the most promising but technically difficult targets in immuno-oncology. While several Chinese companies have advanced programs, the Company believes that Liminatus is the only U.S.-based company developing a CD47 blocker with a validated safety profile. This distinction is critical. In an increasingly fragmented global market, the Company believes that access to U.S.-origin, low-toxicity CD47 agents will be strategically valuable for multinational pharma companies seeking to pair their PD-1/PD-L1 drugs with patent-protected synergistic agents.