# EDGAR Filing Document

**Accession Number:** 0001096056
**File Stem:** 0001096056-26-000042
**Filing Date:** 2026-3
**Character Count:** 8808
**Document Hash:** e096b8ca084e1b60a790d82eb46c087b
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001096056-26-000042.hdr.sgml**: 20260415

**ACCESSION NUMBER**: 0001096056-26-000042

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20260317

**FILED AS OF DATE**: 20260319

**DATE AS OF CHANGE**: 20260319

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** MEAD HOWARD IOAN
- **CENTRAL INDEX KEY:** 0001964326

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-35370
- **FILM NUMBER:** 26772670

**MAIL ADDRESS:**
- **STREET 1:** LUXFER HOLDINGS PLC
- **STREET 2:** LUMNS LANE
- **CITY:** MANCHESTER
- **STATE:** X0
- **ZIP:** M27 8LN
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** LUXFER HOLDINGS PLC
- **CENTRAL INDEX KEY:** 0001096056
- **STANDARD INDUSTRIAL CLASSIFICATION:** INDUSTRIAL INORGANIC CHEMICALS [2810]
- **ORGANIZATION NAME:** 08 Industrial Applications and Services
- **EIN:** 000000000
- **STATE OF INCORPORATION:** X0
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** LUMNS LANE
- **CITY:** MANCHESTER
- **STATE:** X0
- **ZIP:** M27 8LN
- **BUSINESS PHONE:** 441615159620

**MAIL ADDRESS:**
- **STREET 1:** LUMNS LANE
- **CITY:** MANCHESTER
- **STATE:** X0
- **ZIP:** M27 8LN

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[ ] 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**<sup>*</sup><br>MEAD HOWARD IOAN<br><sub>(Last) (First) (Middle)</sub><br>LUXFER HOLDINGS PLC, LUMNS LANE<br><sub>(Street)</sub><br>MANCHESTER,  M27 8LN<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2026-03-17 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [ ] 10% Owner<br>[X] Officer (give title below) [ ] Other (specify below)<br>_See Remarks_ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>LUXFER HOLDINGS PLC [ LXFR ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| Ordinary Shares | 2026-03-17 |  | M |  | 800 | A | <sup>(1)</sup> | 10772 | D |  |
| Ordinary Shares | 2026-03-17 |  | F |  | 347 | D | $11.80 | 10425 | D |  |
| Ordinary Shares | 2026-03-18 |  | M |  | 954 | A | <sup>(1)</sup> | 11379 | D |  |
| Ordinary Shares | 2026-03-18 |  | F |  | 413 | D | $11.82 | 10966 | D |  |
| Ordinary Shares | 2026-03-18 |  | M |  | 7001 | A | <sup>(1)</sup> | 17967 | D |  |
| Ordinary Shares | 2026-03-18 |  | F |  | 3028 | D | $11.82 | 14939 | D |  |
| Ordinary Shares | 2026-03-18 |  | M |  | 5940 | A | <sup>(1)</sup> | 20879 | D |  |
| Ordinary Shares | 2026-03-18 |  | F |  | 2569 | D | $11.82 | 18310 | D |  |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| Restricted Stock Units | <sup>(1)</sup> | 2026-03-17 |  | M |  |  | 800 | <sup>(2)</sup> | <sup>(2)</sup> | Ordinary Shares | 800 | <sup>(1)</sup> | 2408 | D |  |
| Restricted Stock Units | <sup>(1)</sup> | 2026-03-18 |  | M |  |  | 954 | <sup>(3)</sup> | <sup>(3)</sup> | Ordinary Shares | 954 | <sup>(1)</sup> | 1912 | D |  |
| Restricted Stock Units | <sup>(1)</sup> | 2026-03-18 |  | A |  | 7001 |  | 2026-03-18<sup>(4)</sup> | <sup>(4)</sup> | Ordinary Shares | 7001 | <sup>(1)</sup> | 7001 | D |  |
| Restricted Stock Units | <sup>(1)</sup> | 2026-03-18 |  | M |  |  | 7001 | 2026-03-18<sup>(5)</sup> | <sup>(5)</sup> | Ordinary Shares | 7001 | <sup>(1)</sup> | 0 | D |  |
| Restricted Stock Units | <sup>(1)</sup> | 2026-03-18 |  | A |  | 5940 |  | 2026-03-18<sup>(6)</sup> | <sup>(6)</sup> | Ordinary Shares | 5940 | <sup>(1)</sup> | 5940 | D |  |
| Restricted Stock Units | <sup>(1)</sup> | 2026-03-18 |  | M |  |  | 5940 | 2026-03-18<sup>(7)</sup> | <sup>(7)</sup> | Ordinary Shares | 5940 | <sup>(1)</sup> | 0 | D |  |

---

### Footnotes:

(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.

**Signature:** /s/ Benjamin Coulson under Power of Attorney for Howard I. Mead  
**Date:** 2026-03-19

### Remarks:

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.**