Sec Form 4 Filing - Hatten Sandra L @ Mallinckrodt plc - 2015-05-11

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Hatten Sandra L 2. Issuer Name and Ticker or Trading Symbol Mallinckrodt plc [ MNK] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Sr. VP, Quality (Last) (First) (Middle) 675 MCDONNELL BLVD. 3. Date of Earliest Transaction (MM/DD/YY) 05/11/2015 (Street) HAZELWOOD, MO63042 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Ordinary Shares 05/11/2015 M 1,059 A $ 33.67 6,663 D Ordinary Shares 05/11/2015 M 1,563 A $ 41.73 8,226 D Ordinary Shares 05/11/2015 S 2,024 D $ 122.29 ( 1 ) 6,202 D Ordinary Shares 440 I By Katherine L. Weigel Trust

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Share Options (Right to Buy) $ 33.67 05/11/2015 M 1,059 ( 2 ) 11/30/2021 Ordinary Shares 1,059 $ 0 1,060 D Share Options (Right to Buy) $ 41.73 05/11/2015 M 1,563 ( 3 ) 12/02/2022 Ordinary Shares 1,563 $ 0 2,084 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Hatten Sandra L 675 MCDONNELL BLVD. HAZELWOOD, MO63042 Sr. VP, Quality Signatures /s/Kenneth L. Wagner, Attorney-in-Fact 05/12/2015 Signature of Reporting Person Date

Explanation of Responses:

( 1 )The price represents a weighted average. The shares were sold in multiple transactions at prices ranging from $122.26 to $122.33, inclusive. Ms. Hatten will provide, upon request of the SEC staff, Mallinckrodt plc or a shareholder of Mallinckrodt plc complete information regarding the number of shares sold at each price within the range. ( 2 )Options with respect to 1,059 Ordinary Shares vested on December 1, 2014. ( 3 )Options with respect to 521 Ordinary Shares vested on December 3, 2013 and options with respect to 1,042 Ordinary Shares vested on December 3, 2014.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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