Henriette Nielsen - Jul 31, 2025 Form 4 Insider Report for Mallinckrodt plc

Role
EVP & Chief Transformation OFC
Signature
/s/ Mark Tyndall, Attorney-in-Fact
Transactions as of
Jul 31, 2025
Transactions value $
$0
Form type
4
Date filed
8/4/2025, 08:55 PM
Previous filing
Jan 17, 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Nielsen Henriette EVP & Chief Transformation OFC 675 MCDONNELL BLVD., HAZELWOOD /s/ Mark Tyndall, Attorney-in-Fact 2025-08-04 0001944337

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction Restricted Stock Units Award $0 +32.8K +299.99% $0.00 43.8K Jul 31, 2025 Ordinary Shares 32.8K Direct F1, F2
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 On July 31, 2025, pursuant to the Transaction Agreement, dated as of March 13, 2025 (as amended, the "Transaction Agreement"), by and among Mallinckrodt plc (the "Issuer"), Endo, Inc. ("Endo") and Salvare Merger Sub LLC, the Issuer's wholly owned subsidiary ("Merger Sub"), the Merger Sub merged with and into Endo (the "Business Combination"), with Endo surviving the Business Combination as a wholly owned subsidiary of the Issuer.
F2 Upon consummation of the Business Combination, each performance unit ("PSU") held by the reporting person automatically converted into a restricted unit ("RSU"). Each RSU will fully vest on December 25, 2026.

Remarks:

This Form 4 constitutes a notice to the Issuer for purposes of Part V of the Companies Act 2014.