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: SHARAN NITESH CIK: 0001917992 Role: Officer (Chief Financial Officer) --- Non-Derivative Transactions --- [Transaction #1] Security: Class A Common Stock Date: 2026-06-03 | Code: A (Grant or award) Shares: +289,798 Shares Owned After: 289,798 | 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: 2026-06-04 | Code: A (Grant or award) Shares: +44,548 | Price: $0.00 Shares Owned After: 334,346 | Ownership: D (Direct) Footnotes: [F3] Represents an award of restricted stock. [Transaction #3] Security: Class A Common Stock Date: 2026-06-05 | Code: P (Open market purchase) Shares: +6,500 | Price: $60.00 Total Value: $390,000.00 Shares Owned After: 340,846 | 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. F3: Represents an award of restricted stock. --- Signature --- /s/ /s/ Rajeeb Hazra, Attorney-in-Fact (2026-06-08)