# EDGAR Filing Document

**Accession Number:** 0001051627
**File Stem:** 0001437749-26-006432
**Filing Date:** 2026-3
**Character Count:** 7119
**Document Hash:** 24041d2b3cb4b0c9e08380017c02fb4b
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001437749-26-006432.hdr.sgml**: 20260302

**ACCESSION NUMBER**: 0001437749-26-006432

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20260226

**FILED AS OF DATE**: 20260302

**DATE AS OF CHANGE**: 20260302

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** FISCHER GARY L
- **CENTRAL INDEX KEY:** 0001257647

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 000-24085
- **FILM NUMBER:** 26710342

**MAIL ADDRESS:**
- **STREET 1:** 4281 TECHNOLOGY DRIVE
- **CITY:** FREMONT
- **STATE:** CA
- **ZIP:** 94538
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** AXT INC
- **CENTRAL INDEX KEY:** 0001051627
- **STANDARD INDUSTRIAL CLASSIFICATION:** SEMICONDUCTORS & RELATED DEVICES [3674]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 943031310
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 4281 TECHNOLOGY DR.
- **CITY:** FREMONT
- **STATE:** CA
- **ZIP:** 94538
- **BUSINESS PHONE:** 510.438.4734

**MAIL ADDRESS:**
- **STREET 1:** 4281 TECHNOLOGY DR.
- **CITY:** FREMONT
- **STATE:** CA
- **ZIP:** 94538

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** AMERICAN XTAL TECHNOLOGY
- **DATE OF NAME CHANGE:** 19971217

### 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).

[ ] 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>FISCHER GARY L<br><sub>(Last) (First) (Middle)</sub><br>4281 TECHNOLOGY DR.<br><sub>(Street)</sub><br>FREMONT, CA 94538<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2026-02-26 | **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>_CFO_ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>AXT INC [ AXTI ] | **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 |
| Common Stock | 2026-02-26 |  | M |  | 65685<sup>(1)</sup> | A | $5.21 | 503400 | D |  |
| Common Stock | 2026-02-26 |  | M |  | 34203<sup>(2)</sup> | A | $9.50 | 537603 | D |  |
| Common Stock | 2026-02-26 |  | M |  | 55500<sup>(3)</sup> | A | $5.77 | 593103 | D |  |
| Common Stock | 2026-02-26 |  | M |  | 92440<sup>(4)</sup> | A | $3.06 | 685543 | 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 |
| Stock Option (Right to Buy) | $5.21 | 2026-02-26 |  | M |  |  | 65685<sup>(1)</sup> | 2017-10-28 | 2026-10-28 | Common Stock | 65685 | $0 | 0 | D |  |
| Stock Option (Right to Buy) | $9.50 | 2026-02-26 |  | M |  |  | 34203<sup>(2)</sup> | 2018-10-27 | 2027-10-27 | Common Stock | 34203 | $0 | 0 | D |  |
| Stock Option (Right to Buy) | $5.77 | 2026-02-26 |  | M |  |  | 55500<sup>(3)</sup> | 2019-11-05 | 2028-11-05 | Common Stock | 55500 | $0 | 0 | D |  |
| Stock Option (Right to Buy) | $3.06 | 2026-02-26 |  | M |  |  | 92440<sup>(4)</sup> | 2020-11-06 | 2029-11-06 | Common Stock | 92440 | $0 | 0 | D |  |

---

### Footnotes:

(1) Represents the exercise of options which were originally granted on 10/28/2016 and became first exercisable on 10/28/2017. All of the shares subject to this option are fully vested.

(2) Represents the exercise of options which were originally granted on 10/27/2017 and became first exercisable on 10/27/2018. All of the shares subject to this option are fully vested.

(3) Represents the exercise of options which were originally granted on 11/5/2018 and became first exercisable on 11/5/2019. All of the shares subject to this option are fully vested.

(4) Represents the exercise of options which were originally granted on 11/6/2019 and became first exercisable on 11/6/2020. All of the shares subject to this option are fully vested.

**Signature:** /s/ Jeff Sensiba, Attorney-in-Fact  
**Date:** 2026-03-02

### 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.**