HONEYWELL INTERNATIONAL INC - 04 Jun 2026 Form 3 Insider Report for Quantinuum Inc. (QNT)

Reporting relationship: 10%+ Owner
Issuer ticker: QNT
Reported as of: 04 Jun 2026
Net transaction value: $0
SEC form: 3
Accepted by SEC: 04 Jun 2026, 19:18:09 UTC
Prior SEC filing: 30 Oct 2025
Next SEC filing: 11 Jun 2026
Source filing: View source filing
Reporting owner signature: Honeywell International Inc., /s/ Jimmy Steinberg, Senior Vice President, Corporate Development and Global Head of M&A

Key filing fact

HONEYWELL INTERNATIONAL INC filed Form 3 for Quantinuum Inc. (QNT) on 04 Jun 2026.

Key facts

This page summarizes HONEYWELL INTERNATIONAL INC's Form 3 filing for Quantinuum Inc. (QNT).
0 reported transactions and 2 derivative rows are listed below.
Accepted by SEC: 04 Jun 2026, 19:18.

Change

Previous filing in this sequence was filed on 30 Oct 2025.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Official SEC source

Ownership activity is grounded in SEC Form 3 disclosures.

View source filing

Reporting Owners (2)

CIK 0000773840 Primary reporting owner

HONEYWELL INTERNATIONAL INC

Relationship: 10%+ Owner
Address: 855 S. MINT STREET, CHARLOTTE
Signature: Honeywell International Inc., /s/ Jimmy Steinberg, Senior Vice President, Corporate Development and Global Head of M&A
Signature date: 04 Jun 2026

CIK 0002137640

Honeywell Holdings International Inc.

Relationship: 10%+ Owner
Address: C/O HONEYWELL INTERNATIONAL INC., 855 S. MINT STREET, CHARLOTTE
Signature: Honeywell Holdings International Inc., /s/ Jake Wasserman, Secretary
Signature date: 04 Jun 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

QNT holding

Class B Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 124,628,729
Date: 04 Jun 2026
Ownership: See Footnotes
Footnotes: F1, F2

QNT holding

Class B Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 124,628,729
Date: 04 Jun 2026
Ownership: See Footnotes
Footnotes: F1, F2

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

QNT holding Derivative

Common Units

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date: 04 Jun 2026
Ownership: See Footnotes
Underlying class: Class A Common Stock
Underlying amount: 124,628,729
Exercise price
Footnotes: F1, F2, F3

QNT holding Derivative

Common Units

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date: 04 Jun 2026
Ownership: See Footnotes
Underlying class: Class A Common Stock
Underlying amount: 124,628,729
Exercise price
Footnotes: F1, F2, F3

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote F1

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").

Footnote F2

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.

Footnote F3

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.