Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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
OMB APPROVAL
OMB Number: 3235-0104
Expires: January 31, 2005
Estimated average burden hours per response... 0.5

(Print or Type Responses)
1. Name and Address of Reporting Person *
  Kegler George A.
 2. Date of Event Requiring Statement (Month/Day/Year)
12/06/2018		 3. Issuer Name and Ticker or Trading Symbol
Mallinckrodt plc [MNK]
(Last)
(First)
(Middle)
675 MCDONNELL BLVD.		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
EVP & CFO, Interim
 5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

HAZELWOOD, MO 63042		 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 Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Ordinary Shares 15,315 (1)
D
 

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Employee Share Options (Right to Buy) 02/01/2014(2) 02/01/2023 Ordinary Shares 5,933 $ 45.41 D  
Employee Share Options (Right to Buy) 01/02/2015(3) 01/02/2024 Ordinary Shares 6,037 $ 51.35 D  
Employee Share Options (Right to Buy) 01/09/2016(4) 01/09/2025 Ordinary Shares 3,968 $ 103.57 D  
Employee Share Options (Right to Buy) 01/04/2017(5) 01/04/2026 Ordinary Shares 3,601 $ 72.61 D  
Employee Share Options (Right to Buy) 01/03/2018(6) 01/03/2027 Ordinary Shares 4,752 $ 51.73 D  
Employee Share Options (Right to Buy) 04/02/2019(7) 04/02/2028 Ordinary Shares 15,174 $ 13.8 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Kegler George A.
675 MCDONNELL BLVD.
HAZELWOOD, MO 63042		       EVP & CFO, Interim  

Signatures

/s/ Stephanie D. Miller, Attorney-in-Fact 12/14/2018
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(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).
(1) Includes 7,922 restricted share units which vest in four equal annual installments beginning on the first anniversary of the date of grant.
(2) Consists of previously granted employee stock options converted pursuant to the terms of the Employee Matters Agreement by and between Covidien plc ("Covidien") and Mallinckrodt plc, dated as of June 28, 2013 to reflect the separation of the pharmaceuticals business of Covidien from the rest of Covidien. The options vested in four equal annual installments beginning February 1, 2014.
(3) The options vest in four equal annual installments beginning January 2, 2015.
(4) The options vest in four equal annual installments beginning January 9, 2016.
(5) The options vest in four equal annual installments beginning January 4, 2017.
(6) The options vest in four equal annual installments beginning January 3, 2018.
(7) The options vest in four equal annual installments beginning April 2, 2019.

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, See Instruction 6 for procedure.

Potential persons who are to respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB number.