Abbas Hussain - 31 Jul 2025 Form 4 Insider Report for Mallinckrodt plc

Reporting relationship: Director
Issuer ticker: N/A
Reported as of: 31 Jul 2025
Net transaction value: $0
SEC form: 4
Accepted by SEC: 04 Aug 2025, 20:53:40 UTC
Prior SEC filing: 12 Jun 2025
Next SEC filing: 06 Oct 2025
Source filing: View source filing
Reporting owner signature: /s/ Mark Tyndall, Attorney-in-Fact

Key filing fact

Abbas Hussain filed Form 4 for Mallinckrodt plc on 04 Aug 2025.

Key facts

This page summarizes Abbas Hussain's Form 4 filing for Mallinckrodt plc.
5 reported transactions and 3 derivative rows are listed below.
Accepted by SEC: 04 Aug 2025, 20:53.

Change

Previous filing in this sequence was filed on 12 Jun 2025.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001821956 Primary reporting owner

Hussain Abbas

Relationship: Director
Address: 675 MCDONNELL BLVD., HAZELWOOD
Signature: /s/ Mark Tyndall, Attorney-in-Fact
Signature date: 04 Aug 2025

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

No ticker transaction

Ordinary Shares

Options Exercise

Transaction value
Shares: +12,036
Change %: +1020%
Price
Shares after: 13,216
Date: 31 Jul 2025
Ownership: Direct
Footnotes: F1

No ticker transaction

Ordinary Shares

Tax liability

Transaction value
Shares: -3,433
Change %: -26%
Price
Shares after: 9,783
Date: 31 Jul 2025
Ownership: Direct
Footnotes: F2

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

No ticker transaction Derivative

Restricted Stock Units

Award

Transaction value: $0
Shares: +16,414
Change %: +300%
Price: $0.000000
Shares after: 21,886
Date: 31 Jul 2025
Ownership: Direct
Underlying class: Ordinary Shares
Underlying amount: 16,414
Exercise price
Footnotes: F3

No ticker transaction Derivative

Restricted Stock Units

Disposed to Issuer

Transaction value
Shares: -9,850
Change %: -45%
Price
Shares after: 12,036
Date: 31 Jul 2025
Ownership: Direct
Underlying class: Ordinary Shares
Underlying amount: 9,850
Exercise price
Footnotes: F4, F5

No ticker transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value: $0
Shares: -12,036
Change %: -100%
Price: $0.000000
Shares after: 0
Date: 31 Jul 2025
Ownership: Direct
Underlying class: Ordinary Shares
Underlying amount: 12,036
Exercise price
Footnotes: F1

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Section 16 status

Abbas Hussain is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may still apply in specific circumstances.

Explanation of responses 5 footnotes

Footnote 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. Upon the reporting person's resignation as a director of the Issuer, effective as of immediately following the Merger Effective Time (as defined in the Transaction Agreement), each restricted unit (the "RSU") held by the reporting person automatically settled in ordinary shares of the Issuer at one share per RSU.

Footnote F2

The number of ordinary shares withheld to satisfy tax withholding obligations arising out of the vesting of RSUs is based on a percentage and did not take into account any market value as the Issuer's ordinary shares are not listed or quoted on a recognized trading market.

Footnote F3

Upon consummation of the Business Combination, each performance unit ("PSU") held by the reporting person automatically converted into an RSU.

Footnote F4

The reporting person entered into an agreement with the Issuer pursuant to which the reporting person forfeited the right to receive 9,850 RSUs that would otherwise have vested in exchange for a payment from the Issuer to facilitate the reporting person's ability to satisfy certain tax obligations related to the RSUs scheduled to vest.

Footnote F5

The number of RSUs forfeited is based on a percentage.

SEC remarks

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