Sec Form 4/A Filing - Gibbons Peter @ LUXFER HOLDINGS PLC - 2022-03-13

FORM 4/A 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 Gibbons Peter 2. Issuer Name and Ticker or Trading Symbol LUXFER HOLDINGS PLC [ LXFR] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) VP and GM, Luxfer Graphic Arts (Last) (First) (Middle) LUXFER HOLDINGS PLC, LUMNS LANE 3. Date of Earliest Transaction (MM/DD/YY) 03/13/2022 (Street) MANCHESTER, X0M27 8LN 4. If Amendment, Date Original Filed (MM/DD/YY) 03/15/2022 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 03/13/2022 M 567 A 12,671( 2 ) D Ordinary Shares 03/13/2022 F 190( 3 ) D $ 19.51 12,481 D Ordinary Shares 03/14/2022 M 817 A 13,298 D Ordinary Shares 03/14/2022 F 270( 4 ) D $ 19.51 13,028 D

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 Restricted Stock Units ( 1 ) 03/13/2022 M 567 ( 5 ) ( 5 ) Ordinary Shares 567 ( 1 ) 1,070 D Restricted Stock Units ( 1 ) 03/14/2022 M 817 ( 6 ) ( 6 ) Ordinary Shares 817 ( 1 ) 765 D Restricted Stock Units ( 1 ) 03/14/2022 A 1,600 ( 7 ) ( 7 ) Ordinary Shares 1,600 ( 1 ) 1,600 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Gibbons Peter LUXFER HOLDINGS PLC LUMNS LANE MANCHESTER, X0M27 8LN VP and GM, Luxfer Graphic Arts Signatures /s/ Megan E. Glise under Power of Attorney for Peter Gibbons 03/16/2022 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Restricted Stock Units convert 1 for 1, subject to a nominal payment of $1.00 per Ordinary Share. ( 2 )Includes 270 Ordinary Shares acquired pursuant to the Luxfer Holdings PLC Employee Stock Purchase Plan ("ESPP") for the purchase periods of December 19, 2020 - June 18, 2021 and June 19, 2021 - December 24, 2021. These transactions are exempt pursuant to Rule 16b-3(c). In accordance with the ESPP, these shares were purchased at a price equal to 85% of the closing price of Issuer's Ordinary Shares on June 18, 2021 and December 24, 2021, respectively. ( 3 )The original Form 4, filed on March 15, 2022, stated that 282 Ordinary Shares were withheld for payment of conversion price and tax liability when, in fact, 190 Ordinary Shares were withheld. ( 4 )The original Form 4, filed on March 15, 2022, stated that 407 Ordinary Shares were withheld for payment of conversion price and tax liability when, in fact, 270 Ordinary Shares were withheld. ( 5 )The remaining Restricted Stock Units vest in two equal installments beginning on March 13, 2023. The amounts above include additional Restricted Stock Units accrued related to dividend reinvestment rights. ( 6 )The remaining Restricted Stock Units vest on March 14, 2023. The amounts above include additional Restricted Stock Units accrued related to dividend reinvestment rights. ( 7 )The Restricted Stock Units vest in four equal installments beginning on March 14, 2023.

Remarks: The original Form 4, filed on March 15, 2022, is being amended by this Form 4/A solely to correct an administrative error, which misstated the number of Ordinary Shares withheld for payment of conversion price and tax liability with respect to two transactions. See Footnotes 3 and 4. As a result of this administrative error, the number of Ordinary Shares beneficially owned by the Reporting Person following the corrected transactions increased by 229 Ordinary Shares.

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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