LUXFER HOLDINGS PLC

3.1 Articles of Association of Luxfer Holdings PLC, initially filed with the SEC on December 2, 2011 and as amended on May 22, 2018, May 15, 2019, and July 29, 2022 (filed herewith)

31.1 Certification of Chief Executive Officer pursuant to Rule 13a-14(a) of the Securities Exchange Act of 1934 (filed herewith)

31.2 Certification of Chief Financial Officer pursuant to Rule 13a-14(a) of the Securities Exchange Act of 1934 (filed herewith)

32.1 Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (furnished herewith)

32.2 Certification of Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (furnished herewith)

101.INS The financial statements from the Company’s Interim Report on Form 10-Q for the quarter ended September 29, 2024, formatted in inline XRBL: (i) Condensed Consolidated Statements of Income; (ii) Condensed Consolidated Statements of Comprehensive Income; (iii) Condensed Consolidated Balance Sheets; (iv) Condensed Consolidated Statements of Cash Flows; (v) Condensed Consolidated Statements of Changes in Equity; and (vi) Notes to Condensed Consolidated Financial Statements, tagged as blocks of text and including detailed tags. The instance document does not appear in the Interactive Data File because its XRBL tags are embedded within the Inline XRBL document

101.SCH Inline XRBL Taxonomy Extension Schema Document

101.CAL Inline XRBL Taxonomy Extension Calculation Linkbase Document

101.DEF Inline XRBL Taxonomy Extension Definition Linkbase Document

101.LAB Inline XRBL Taxonomy Extension Label Linkbase Document

101.PRE Inline XRBL Taxonomy Extension Presentation Linkbase Document

104 Cover Page Interactive Data File (formatted as inline XRBL and contained in Exhibit 101)

SIGNATURES

Pursuant to the requirements of Section 13 or 15 (d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Luxfer Holdings plc

(Registrant)

/s/Andrew Butcher

Andrew Butcher

Chief Executive Officer

(Duly Authorized Officer)