# EDGAR Filing Document

**Accession Number:** 0000773840
**File Stem:** 0001628280-26-040988
**Filing Date:** 2026-6
**Character Count:** 7321
**Document Hash:** 2921cd41b4a94a4c1c9e89070178e545
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001628280-26-040988.hdr.sgml**: 20260604

**ACCESSION NUMBER**: 0001628280-26-040988

**CONFORMED SUBMISSION TYPE**: 3

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20260604

**FILED AS OF DATE**: 20260604

**DATE AS OF CHANGE**: 20260604

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** HONEYWELL INTERNATIONAL INC
- **CENTRAL INDEX KEY:** 0000773840
- **STANDARD INDUSTRIAL CLASSIFICATION:** AIRCRAFT ENGINES & ENGINE PARTS [3724]
- **ORGANIZATION NAME:** 04 Manufacturing
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 3
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-43328
- **FILM NUMBER:** 261066500

**BUSINESS ADDRESS:**
- **STREET 1:** 855 S. MINT STREET
- **CITY:** CHARLOTTE
- **STATE:** NC
- **ZIP:** 28202
- **BUSINESS PHONE:** 704-627-6200

**MAIL ADDRESS:**
- **STREET 1:** 855 S. MINT STREET
- **CITY:** CHARLOTTE
- **STATE:** NC
- **ZIP:** 28202

**FORMER NAME:**
- **FORMER CONFORMED NAME:** ALLIEDSIGNAL INC
- **DATE OF NAME CHANGE:** 19940929
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Honeywell Holdings International Inc.
- **CENTRAL INDEX KEY:** 0002137640

**ORGANIZATION NAME:**
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 3
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-43328
- **FILM NUMBER:** 261066499

**BUSINESS ADDRESS:**
- **STREET 1:** 855 S. MINT STREET
- **CITY:** CHARLOTTE
- **STATE:** NC
- **ZIP:** 28202
- **BUSINESS PHONE:** (877) 841-2840

**MAIL ADDRESS:**
- **STREET 1:** 855 S. MINT STREET
- **CITY:** CHARLOTTE
- **STATE:** NC
- **ZIP:** 28202
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Quantinuum Inc.
- **CENTRAL INDEX KEY:** 0002110105
- **STANDARD INDUSTRIAL CLASSIFICATION:** SERVICES-COMPUTER INTEGRATED SYSTEMS DESIGN [7373]
- **ORGANIZATION NAME:** 06 Technology
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 303 S TECHNOLOGY COURT
- **CITY:** BROOMFIELD
- **STATE:** CO
- **BUSINESS PHONE:** (855) 888-7686

**MAIL ADDRESS:**
- **STREET 1:** 303 S TECHNOLOGY COURT
- **CITY:** BROOMFIELD
- **STATE:** CO

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

## FORM 3

### INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>HONEYWELL INTERNATIONAL INC<br><sub>(Last) (First) (Middle)</sub><br>855 S. MINT STREET<br><sub>(Street)</sub><br>CHARLOTTE, NC 28202<br><sub>(City) (State) (Zip)</sub> | **3. Issuer Name and Ticker or Trading Symbol**<br>Quantinuum Inc. [ QNT ] | **5. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  |
| **2. Date of Event Requiring Statement (Month/Day/Year)**<br>2026-06-04 | **4. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director   [X] 10% Owner<br>[ ] Officer (give title below)   [ ] Other (specify below)<br>_ _ | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Honeywell Holdings International Inc.<br><sub>(Last) (First) (Middle)</sub><br>C/O HONEYWELL INTERNATIONAL INC.<br>855 S. MINT STREET<br><sub>(Street)</sub><br>CHARLOTTE, NC 28202<br><sub>(City) (State) (Zip)</sub> | **3. Issuer Name and Ticker or Trading Symbol**<br>Quantinuum Inc. [ QNT ] | **5. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  |
| **2. Date of Event Requiring Statement (Month/Day/Year)**<br>2026-06-04 | **4. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director   [X] 10% Owner<br>[ ] Officer (give title below)   [ ] Other (specify below)<br>_ _ | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities Beneficially Owned

---

|  |  |  |  |
| --- | --- | --- | --- |
| 1. Title of Security | 2. Amount of Securities Beneficially Owned | 3. Ownership Form | 4. Nature of Indirect Beneficial Ownership |
| Class B Common Stock | 124628729 | I | See Footnotes<sup>(1)(2)</sup> |

---

## Table II - Derivative Securities Beneficially Owned

---

|  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 3. Title and Amount of Underlying Securities | 3. Title and Amount of Underlying Securities | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
| Common Units | <sup>(3)</sup> | <sup>(3)</sup> | Class A Common Stock | 124628729 | <sup>(3)</sup> | I | See Footnotes<sup>(1)(2)</sup> |

---

### Footnotes:

(1) Includes (i) 28,630,074 common units of Quantinuum Holdings, LLC ("Common Units") and a corresponding number of shares of Class B common stock of Quantinuum Inc. held directly by Honeywell Holdings International Inc. and (ii) 95,998,655 Common Units and a corresponding number of shares of Class B common stock of Quantinuum Inc. held directly by Honeywell International Inc. ("Honeywell").

(2) Honeywell Holdings International Inc. is a wholly owned subsidiary of Honeywell, which is a publicly traded company with securities listed on The Nasdaq Stock Market LLC.

(3) Each Common Unit may be redeemed or exchanged for one share of Class A common stock of the Issuer (or, at the Issuer's election, cash). The Common Units have no expiration date. Upon the redemption or exchange of Common Units, a number of shares of Class B common stock equal to the number of Common Units that are redeemed or exchanged will automatically be cancelled for no consideration.

**Signature:** Honeywell International Inc., /s/ Jimmy Steinberg, Senior Vice President, Corporate Development and Global Head of M&A  
**Date:** 2026-06-04

**Signature:** Honeywell Holdings International Inc., /s/ Jake Wasserman, Secretary  
**Date:** 2026-06-04

### 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.**