# EDGAR Filing Document

**Accession Number:** 0001278951
**File Stem:** 0001641172-25-022600
**Filing Date:** 2025-8
**Character Count:** 16805
**Document Hash:** ef773d0d9c077ae116b4072b6796c5d6
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001641172-25-022600.hdr.sgml**: 20250807

**ACCESSION NUMBER**: 0001641172-25-022600

**CONFORMED SUBMISSION TYPE**: SCHEDULE 13D

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20250807

**DATE AS OF CHANGE**: 20250807

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Mallinckrodt plc
- **CENTRAL INDEX KEY:** 0001567892
- **STANDARD INDUSTRIAL CLASSIFICATION:** PHARMACEUTICAL PREPARATIONS [2834]
- **ORGANIZATION NAME:** 03 Life Sciences
- **EIN:** 981088325
- **STATE OF INCORPORATION:** L2
- **FISCAL YEAR END:** 1226

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-87833
- **FILM NUMBER:** 251194997

**BUSINESS ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** COLLEGE BUSINESS & TECHNOLOGY PARK
- **STREET 2:** CRUISERATH, BLANCHARDSTOWN
- **CITY:** DUBLIN 15
- **PROVINCE COUNTRY:** L2
- **ZIP:** D15
- **BUSINESS PHONE:** 353 1 6960000

**MAIL ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** COLLEGE BUSINESS & TECHNOLOGY PARK
- **STREET 2:** CRUISERATH, BLANCHARDSTOWN
- **CITY:** DUBLIN 15
- **PROVINCE COUNTRY:** L2
- **ZIP:** D15
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** GOLDENTREE ASSET MANAGEMENT LP
- **CENTRAL INDEX KEY:** 0001278951

**ORGANIZATION NAME:**
- **EIN:** 134118850
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D

**BUSINESS ADDRESS:**
- **STREET 1:** 300 PARK AVENUE
- **STREET 2:** 21ST FLOOR
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10022
- **BUSINESS PHONE:** 2128473500

**MAIL ADDRESS:**
- **STREET 1:** 300 PARK AVENUE
- **STREET 2:** 21ST FLOOR
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10022

## Ex-1

**Exhibit 1**

**JOINT FILING AGREEMENT**

In accordance with Rule 13d-1(k)(1) promulgated under the Securities Exchange Act of 1934, as amended, the undersigned hereby agree that they are jointly filing this statement on Schedule 13D. Each of them is responsible for the timely filing of such statement and any amendments thereto, and for the completeness and accuracy of the information concerning such person contained therein; but none of them is responsible for the completeness or accuracy of the information concerning the other persons making the filing, unless such person knows or has reason to believe that such information is inaccurate.

IN WITNESS WHEREOF, the undersigned hereby execute this Joint Filing Agreement as of August 7th, 2025.

---

| | |
|:---|:---|
| **GOLDENTREE ASSET MANAGEMENT LP** | **GOLDENTREE ASSET MANAGEMENT LP** |
| By: GoldenTree Asset Management LLC, its general partner | By: GoldenTree Asset Management LLC, its general partner |
| /s/ Steven A. Tananbaum | /s/ Steven A. Tananbaum |
| By: | Steven A. Tananbaum |
| Title: | Managing Member |
| **GOLDENTREE ASSET MANAGEMENT LLC** | **GOLDENTREE ASSET MANAGEMENT LLC** |
| /s/ Steven A. Tananbaum | /s/ Steven A. Tananbaum |
| By: | Steven A. Tananbaum |
| Title: | Managing Member |
| /s/ Steven A. Tananbaum | /s/ Steven A. Tananbaum |
| Steven A. Tananbaum | Steven A. Tananbaum |

---

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## SCHEDULE 13D

### Under the Securities Exchange Act of 1934

**Mallinckrodt plc**

*(Name of Issuer)*

**Ordinary Shares, par value $0.01 per share**

*(Title of Class of Securities)*

**G5890A102**

*(CUSIP Number)*

**George Travers**<br>c/o GoldenTree Asset Management LP<br>300 Park Avenue, 21st Floor<br>New York NY 10022<br>(212) 847-3500

*(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)*

**07/31/2025**

*(Date of Event Which Requires Filing of this Statement)*

| **CUSIP No.** | **G5890A102** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**GoldenTree Asset Management LP** | Name of reporting person<br>**GoldenTree Asset Management LP** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**WC** | Source of funds (See Instructions)<br>**WC** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**7926176.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**7926176.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**7926176.00** | Aggregate amount beneficially owned by each reporting person<br>**7926176.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**20.1%** | Percent of class represented by amount in Row (11)<br>**20.1%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**PN** | Type of Reporting Person (See Instructions)<br>**PN** | |

---

| **CUSIP No.** | **G5890A102** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**GoldenTree Asset Management LLC** | Name of reporting person<br>**GoldenTree Asset Management LLC** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**WC** | Source of funds (See Instructions)<br>**WC** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**7926176.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**7926176.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**7926176.00** | Aggregate amount beneficially owned by each reporting person<br>**7926176.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**20.1%** | Percent of class represented by amount in Row (11)<br>**20.1%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

**Comment for Reporting Person:** Limited Liability Company

| **CUSIP No.** | **G5890A102** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Steven A. Tananbaum** | Name of reporting person<br>**Steven A. Tananbaum** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**PF** | Source of funds (See Instructions)<br>**PF** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**X1** | Citizenship or place of organization<br>**X1** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**20000.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**7926176.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**20000.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**7926176.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**7946176.00** | Aggregate amount beneficially owned by each reporting person<br>**7946176.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**20.2%** | Percent of class represented by amount in Row (11)<br>**20.2%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

**Item 1. Security and Issuer**

**(a) Title of Class of Securities:**
Ordinary Shares, par value $0.01 per share

**(b) Name of Issuer:**
Mallinckrodt plc

**(c) Address of Issuer's Principal Executive Offices:**
College Business & Technology Park, Cruiserath Road, Blanchardstown, Dublin, L2, 15D15TX2V

This statement on Schedule 13D (the "Schedule 13D") relates to the ordinary shares, par value $0.01 per share ("Ordinary Shares") of Mallinckrodt plc (the "Issuer"), whose principal executive office is located at College Business & Technology, Cruiserath, Blanchardstown, Dublin 15, Ireland.

**Item 4. Purpose of Transaction**

Endo Merger

Pursuant to the transaction agreement (the "Transaction Agreement") between Endo, Inc. ("Endo") and Salvare Merger Sub LLC, a wholly owned subsidiary of the Issuer ("Merger Sub"), on July 31, 2025, Merger Sub merged with and into Endo (the "Merger"), with Endo surviving the Merger as a wholly owned subsidiary of the Issuer. As a result of the Merger, the Endo common stock held of record by certain managed accounts for which the Investment Manager serves as investment manager was cancelled and converted into the right to receive 4,539,148 Ordinary Shares.

Additionally, affiliates of GoldenTree hold $11,000,000 of Endo Finance Holdings, Inc.'s 8.500% Senior Secured Notes due 2031; $147,092,630.42 of Endo Finance Holdings, Inc.'s Senior Secured Term Loan due 2031; $38,722,222.23 of MEH, Inc.'s Revolving Credit Facility due 2030; and $318,677,777.77 of MEH, Inc.'s Secured Term Loan due 2030.

General

The Reporting Persons acquired the securities described in this Schedule 13D for investment purposes and intend to review their investments in the Issuer on a continuing basis. Any actions the Reporting Persons might undertake may be made at any time and from time to time without prior notice and will be dependent upon the Reporting Persons' review of numerous factors, including, but not limited to: an ongoing evaluation of the Issuer's business, financial condition, operations and prospects; price levels of the Issuer's securities; general market, industry and economic conditions; the relative attractiveness of alternative business and investment opportunities; and other future developments.

The Reporting Persons may acquire additional securities of the Issuer, or retain or sell all or a portion of the securities then held, in the open market or in privately negotiated transactions. In addition, the Reporting Persons may engage in discussions with management, the board of directors of the Issuer, and other securityholders of the Issuer and other relevant parties or encourage, cause or seek to cause the Issuer or such persons to consider or explore extraordinary corporate transactions, such as: a merger, reorganization or take-private transaction that could result in the de-listing or de-registration of the Ordinary Shares; sales or acquisitions of assets or businesses; changes to the capitalization or dividend policy of the Issuer; or other material changes to the Issuer's business or corporate structure, including changes in management or the composition of the board of directors. To facilitate their consideration of such matters, the Reporting Persons may retain consultants and advisors and may enter into discussions with potential sources of capital and other third parties. The Reporting Persons may exchange information with any such persons pursuant to appropriate confidentiality or similar agreements. The Reporting Persons will likely take some or all of the foregoing steps at preliminary stages in their consideration of various possible courses of action before forming any intention to pursue any particular plan or direction.

Other than as described above, the Reporting Persons do not currently have any plans or proposals that relate to, or would result in, any of the matters listed in Items 4(a)-(j) of Schedule 13D, although, depending on the factors discussed herein, the Reporting Persons may change their purpose or formulate different plans or proposals with respect thereto at any time.

**Item 5. Interest in Securities of the Issuer**

**(a)**
The information contained on the cover pages to this Schedule 13D is incorporated herein by reference.

The securities reported herein include (i) 7,926,176 Ordinary Shares held directly by certain funds and separate accounts managed by the Investment Manager and (ii) 20,000 Ordinary Shares held directly by Mr. Tananbaum.

The ownership percentage set forth herein is based on 39,413,711 Ordinary Shares outstanding as of August 5, 2025 as disclosed in the Issuer's Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on August 6, 2025.

The Investment Manager is the investment manager or advisor to certain funds and a separately managed account by the Investment Manager (the "Funds"). IMGP is the general partner of the Investment Manager. Steven A. Tananbaum is the managing member of IMGP. As a result of these relationships, each of the Reporting Persons may be deemed to share beneficial ownership of the securities held of record by the Funds.

**(b)**
The information contained on the cover pages to this Schedule 13D is incorporated herein by reference.

**(c)**
Except as set forth in Items 3 and 4 above, during the past 60 days, the Reporting Persons have not effected any transactions in the Ordinary Shares.

**Item 6. Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer.**

None of the Reporting Persons has any contracts, arrangements, understandings or relationships (legal or otherwise) with any person with respect to any securities of the Issuer, including but not limited to any contracts, arrangements, understandings or relationships concerning the transfer or voting of such securities, finder's fees, joint ventures, loan or option arrangements, puts or calls, guarantees of profits, division of profits or losses, or the giving or withholding of proxies.

### SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** GoldenTree Asset Management LP

**Signature:** By: GoldenTree Asset Management LLC, its General Partner, /s/ Steven A. Tananbaum

**Name/Title:** Steven A. Tananbaum, Managing Member

**Date:** 08/07/2025

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** GoldenTree Asset Management LLC

**Signature:** /s/ Steven A. Tananbaum

**Name/Title:** Steven A. Tananbaum, Managing Member

**Date:** 08/07/2025

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Steven A. Tananbaum

**Signature:** /s/ Steven A. Tananbaum

**Name/Title:** Steven A. Tananbaum

**Date:** 08/07/2025