Quantinuum Inc. (QNT)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-06-03 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: Quantinuum Inc. (QNT) CIK: 0002110105 --- Reporting Owner --- Name: Dehoff Kevin Scott CIK: 0002136882 Role: Officer (Chief Strategy Officer) --- Non-Derivative Transactions --- [Transaction #1] Security: Class A Common Stock Date: 2026-06-03 | Code: A (Grant or award) Shares: +111,460 Shares Owned After: 111,460 | Ownership: D (Direct) Footnotes: [F1] This transaction occurred prior to the Issuer's registration of a class of equity securities under Section 12 of the Securities Exchange Act of 1934, as amended, in connection with the Issuer's initial public offering, and is reported herein pursuant to Rule 16a-2(a). [F2] Represents an acquisition of restricted shares of Class A Common Stock pursuant to a recapitalization transaction. [Transaction #2] Security: Class A Common Stock Date: 2026-06-05 | Code: P (Open market purchase) Shares: +15,000 | Price: $60.00 Total Value: $900,000.00 Shares Owned After: 126,460 | Ownership: D (Direct) --- Footnotes (Complete Index) --- F1: This transaction occurred prior to the Issuer's registration of a class of equity securities under Section 12 of the Securities Exchange Act of 1934, as amended, in connection with the Issuer's initial public offering, and is reported herein pursuant to Rule 16a-2(a). F2: Represents an acquisition of restricted shares of Class A Common Stock pursuant to a recapitalization transaction. --- Signature --- /s/ /s/ Rajeeb Hazra, Attorney-in-Fact (2026-06-08)