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Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
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SCHEDULE 13D/A 0001332784 XXXXXXXX LIVE 4 Common Stock, par value $0.01 per share 11/03/2025 false 0001567892 G5890A102 Mallinckrodt plc College Business & Technology Park Cruiserath, Blanchardstown Dublin 15 L2 D15 TX2V James Kasmarcik 203-542-4200 Silver Point Capital, L.P. 2 Greenwich Plaza, Suite 1 Greenwich CT 06830 0001332784 N Silver Point Capital, L.P. b OO N DE 0 4213724 0 4213724 4213724 N 10.7 IA PN 0001029625 N Edward A. Mule b OO N X1 0 4213724 0 4213724 4213724 N 10.7 IN 0001382617 N Robert J. O'Shea b OO N X1 0 4213724 0 4213724 4213724 N 10.7 IN Common Stock, par value $0.01 per share Mallinckrodt plc College Business & Technology Park Cruiserath, Blanchardstown Dublin 15 L2 D15 TX2V This Amendment No. 4 (the "Amendment") amends the statement on Schedule 13D originally filed by the Reporting Persons on November 24, 2023, as amended by Amendment No. 1 filed by the Reporting Persons on January 22, 2024, Amendment No. 2 filed by the Reporting Persons on July 8, 2024, and Amendment No. 3 filed by the Reporting Persons on March 18, 2025 (as amended, the "Schedule 13D"). Capitalized terms used but not otherwise defined in this Amendment shall have the meanings ascribed to such terms in the Schedule 13D. Except as otherwise provided herein, each Item of the Schedule 13D remains unchanged. Item 3 of the Schedule 13D is hereby supplemented as follows: The source of funds used in the purchase reported in Item 5 was working capital of the Reporting Persons. The responses of the Reporting Persons to rows (7) through (13) of the cover pages of this Amendment are incorporated herein by reference. As of November 3, 2025, the Reporting Persons beneficially owned 3,863,724 shares of Common Stock, representing 9.8% of the shares of Common Stock then outstanding. The Reporting Persons currently beneficially own 4,213,724 shares of Common Stock, representing 10.7% of the shares of Common Stock outstanding. As reported in the Issuer's Current Report on Form 8-K filed with the Securities and Exchange Commission on October 30, 2025, as of October 27, 2025, there were 39,526,162 shares of Common Stock issued and outstanding. The responses of the Reporting Persons to rows (7) through (13) of the cover pages of this Amendment are incorporated herein by reference. The following sets forth all transactions in the Common Stock effected by the Reporting Persons during the last 60 days: On November 5, 2025, the Reporting Persons purchased 300,000 shares of Common Stock at a price per share of $103.50 in the open market through brokers. On November 4, 2025, the Reporting Persons purchased 50,000 shares of Common Stock at a price per share of $102.00 in the open market through brokers. On November 3, 2025, the Reporting Persons purchased 320,000 shares of Common Stock at a price per share of $103.50 in the open market through brokers. On October 30, 2025, the Reporting Persons purchased 40,000 shares of Common Stock at a price per share of $102.875 in the open market through brokers. Other than as disclosed in Item 4, no person other than the Reporting Persons are known to have the right to receive, or the power to direct the receipt of dividends from, or proceeds from the sale of, the Common Stock held by the Reporting Persons. Not applicable. Exhibit No. Description 1 Joint Filing Agreement, dated as of November 5, 2025, by and among the Reporting Persons 2 Power of Attorney of Robert J. O'Shea and Edward A. Mule (incorporated here by reference to Schedule 13G filed by Silver Point Capital, L.P., Edward A. Mule and Robert J. O'Shea with the Securities and Exchange Commission on February 16, 2016 relating to TopBuild Corp.) Silver Point Capital, L.P. /s/ Steven Weiser Steven Weiser/Authorized Signatory 11/05/2025 Edward A. Mule /s/ Steven Weiser Steven Weiser/Attorney-in-fact 11/05/2025 Robert J. O'Shea /s/ Steven Weiser Steven Weiser/Attorney-in-fact 11/05/2025