LUXFER HOLDINGS PLC Insider Trading Activity

Webster Stephen reported acquisition or exercise transactions in this Form 4 filing.

Accepted by SEC EDGAR 03/19/2026 - 09:40 AM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Webster Stephen reported acquisition or exercise transactions in this Form 4 filing.

Luxfer Holdings CFO Stephen Webster received two grants of stock options on March 18, 2026, covering 14,241 and 12,083 Ordinary Shares. The options are exercisable on a 1-for-1 basis for each Ordinary Share, subject to a nominal payment of $1.00 per share.

According to the disclosure, the grants reflect performance-based Restricted Stock Units originally awarded on March 18, 2024. All of these units were granted and vested on March 18, 2026 after achieving EPS growth and relative total shareholder return goals for the performance period ended December 31, 2025.

Insider Trade Summary 10b5-1

Grant/Award: 26,324 shares

Grant/Award 2 txns

Insider Webster Stephen

Role Chief Financial Officer

Type	Security	Shares	Price	Value
Grant/Award	Stock Option (Right to Buy)	14,241	$0.00	$0.00
Grant/Award	Stock Option (Right to Buy)	12,083	$0.00	$0.00

Holdings After Transaction: Stock Option (Right to Buy) — 26,324 contracts (Direct)

Holdings Before and After: Stock Option (Right to Buy), 0 to 26,324 contracts (Direct)

Footnotes (3)

1. F1. 1 for 1, subject to a nominal payment of $1.00 per Ordinary Share.
2. F2. 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.
3. F3. 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.

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SEC 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

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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

X

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^*

Webster Stephen

(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)
	Chief Financial Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/18/2026

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)
			Code	V	Amount	(A) or (D)	Price

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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Option (Right to Buy)	(1)	03/18/2026		A		14,241		03/18/2026(2)	(2)	Ordinary Shares	14,241	(1)	14,241	D
Stock Option (Right to Buy)	(1)	03/18/2026		A		12,083		03/18/2026(3)	(3)	Ordinary Shares	12,083	(1)	12,083	D

Explanation of Responses:

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

2. 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.

3. 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.

Remarks:

	/s/ Benjamin Coulson under Power of Attorney for Stephen Webster	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)