SEC FORM 4

SEC FORM 4SEC Form 4

FORM 4

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
or Section 30(h) of the Investment Company Act of 1940

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

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

MEAD HOWARD IOAN

(Last)

(First)

(Middle)

LUXFER HOLDINGS PLC, LUMNS LANE

(Street)

MANCHESTER

M27 8LN

(City)

(State)

(Zip)

UNITED STATES

(Country)

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)
	See Remarks

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/17/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Ordinary Shares	03/17/2026		M		800	A	⁽¹⁾	10,772	D
Ordinary Shares	03/17/2026		F		347	D	$11.8	10,425	D
Ordinary Shares	03/18/2026		M		954	A	⁽¹⁾	11,379	D
Ordinary Shares	03/18/2026		F		413	D	$11.82	10,966	D
Ordinary Shares	03/18/2026		M		7,001	A	⁽¹⁾	17,967	D
Ordinary Shares	03/18/2026		F		3,028	D	$11.82	14,939	D
Ordinary Shares	03/18/2026		M		5,940	A	⁽¹⁾	20,879	D
Ordinary Shares	03/18/2026		F		2,569	D	$11.82	18,310	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 (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	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 (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (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: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Restricted Stock Units	⁽¹⁾	03/17/2026		M			800	⁽²⁾	⁽²⁾	Ordinary Shares	800	⁽¹⁾	2,408	D
Restricted Stock Units	⁽¹⁾	03/18/2026		M			954	⁽³⁾	⁽³⁾	Ordinary Shares	954	⁽¹⁾	1,912	D
Restricted Stock Units	⁽¹⁾	03/18/2026		A		7,001		03/18/2026⁽⁴⁾	⁽⁴⁾	Ordinary Shares	7,001	⁽¹⁾	7,001	D
Restricted Stock Units	⁽¹⁾	03/18/2026		M			7,001	03/18/2026⁽⁵⁾	⁽⁵⁾	Ordinary Shares	7,001	⁽¹⁾	0	D
Restricted Stock Units	⁽¹⁾	03/18/2026		A		5,940		03/18/2026⁽⁶⁾	⁽⁶⁾	Ordinary Shares	5,940	⁽¹⁾	5,940	D
Restricted Stock Units	⁽¹⁾	03/18/2026		M			5,940	03/18/2026⁽⁷⁾	⁽⁷⁾	Ordinary Shares	5,940	⁽¹⁾	0	D

Explanation of Responses:

1. 1 for 1, subject to a nominal payment of $1.00 per Ordinary Share.

2. Represents 25% of the Restricted Stock Units granted on March 17, 2025. The remaining Restricted Stock Units will vest in three equal tranches on March 17, 2027, 2028 and 2029.

3. Represents 25% of the Restricted Stock Units granted on March 18, 2024. The remaining Restricted Stock Units will vest in two equal tranches on March 18, 2027 and 2028.

4. Represents the grant of performance-based Restricted Stock Units (at 221% target) awarded on March 18, 2024. 100% of the performance-based Restricted Stock Units were granted and vested on March 18, 2026 upon the achievement of EPS growth goals for the performance period ended December 31, 2025.

5. Represents the 100% vesting of performance-based Restricted Stock Units (at 221% target) awarded on March 18, 2024. 100% of the performance-based Restricted Stock Units were granted and vested on March 18, 2026 upon the achievement of EPS growth goals for the performance period ended December 31, 2025.

6. Represents the grant of performance-based Restricted Stock Units (at 125% target) awarded on March 18, 2024. 100% of the performance-based Restricted Stock Units were granted and vested on March 18, 2026 upon the achievement of relative total shareholder return (TSR) goals for the performance period ended December 31, 2025.

7. Represents the 100% exercise of performance-based Restricted Stock Units (at 125% target) awarded on March 18, 2024. 100% of the performance-based Restricted Stock Units were granted and vested on March 18, 2026 upon the achievement of relative total shareholder return (TSR) goals for the performance period ended December 31, 2025.

Remarks:

	/s/ Benjamin Coulson under Power of Attorney for Howard I. Mead	03/19/2026
	** Signature of Reporting Person	Date
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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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 Number.
* Form 4: SEC 1474 (03-26)

SEC Form 4 filed by Mead Howard Ioan