Director at Quantinuum (QNT) buys 250,000 shares and receives 5,833 RSUs

Rhea-AI Filing Summary

Quantinuum Inc. director Hal Barron significantly increased his direct stake through a large open-market purchase and a new equity award. On Class A Common Stock, he bought 250,000 shares in the open market at $60.00 per share, bringing his direct holdings to 255,833 shares after the trade.

He also received an award of 5,833 restricted stock units, each representing one future share of Class A Common Stock. These RSUs will vest in three equal annual installments beginning on June 5, 2027, adding a long-term, performance-aligned component to his ownership.

Insights

Equity compensation and insider-trading analyst

Large open-market buy plus RSU grant increases this director’s exposure to Quantinuum.

Director Hal Barron executed an open-market purchase of 250,000 shares of Quantinuum Inc. Class A Common Stock at $60.00 per share. This is a strong, discretionary cash outlay, lifting his direct holdings to 255,833 shares after the transaction according to the filing data.

Separately, he acquired 5,833 restricted stock units as an equity award. The RSUs vest in three equal annual installments starting on June 5, 2027, which encourages longer-term alignment with shareholder value. No derivative positions remain in the derivative summary, so current exposure is through common stock and time-vested RSUs.

The combination of a sizable open-market purchase and a time-based RSU grant concentrates his incentives in the company’s future equity performance. The economic impact depends on Quantinuum’s operational and share-price trajectory, which will be reflected in subsequent company filings and disclosures.

Insider Trade Summary

Net Buyer: 250,000 shares ($15,000,000)

Net Buy 2 txns

Insider Barron Hal

Role null

Bought 250,000 shs ($15.00M)

Type	Security	Shares	Price	Value
Purchase	Class A Common Stock	250,000	$60.00	$15.00M
Grant/Award	Class A Common Stock	5,833	$0.00	--

Holdings After Transaction: Class A Common Stock — 255,833 shares (Direct, null)

Footnotes (1)

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Key Figures

Open-market purchase: 250,000 shares Purchase price: $60.00 per share Shares after purchase: 255,833 shares +2 more

5 metrics

Open-market purchase 250,000 shares Class A Common Stock bought at $60.00 per share

Purchase price $60.00 per share Open-market buy of Class A Common Stock

Shares after purchase 255,833 shares Direct Class A Common Stock holdings post-transaction

RSU award size 5,833 RSUs Restricted stock units tied to Class A Common Stock

RSU vesting start June 5, 2027 Three equal annual installments from this date

Key Terms

Class A Common Stock, restricted stock units ("RSUs"), contingent right, vest in three equal annual installments

4 terms

Class A Common Stock financial

"security_title: "Class A Common Stock" for both transactions"

Class A common stock is a category of a company’s shares that carries a specific set of ownership rights—most commonly defined voting power and claims on dividends—set out in the company’s charter. For investors it matters because the class determines how much influence you have over corporate decisions, the share’s likely dividend and trading behavior, and how it compares in value to other share classes, like choosing a particular seat with different privileges at the company’s decision-making table.

restricted stock units ("RSUs") financial

"Represents an award of restricted stock units ("RSUs"), each of which represents a contingent right"

Restricted stock units (RSUs) are a company promise to give an employee shares of stock (or cash equivalent) in the future, but only after certain conditions—usually staying with the company for a set time or hitting performance goals—are met. Investors watch RSUs because when they vest they increase the number of shares outstanding and can lead insiders to sell shares, affecting share price, company dilution and the true cost of employee pay.

contingent right financial

"each of which represents a contingent right to receive one share of Class A Common Stock"

vest in three equal annual installments financial

"The RSUs will vest in three equal annual installments beginning on June 5, 2027."

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Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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^*

Barron Hal

(Last) (First) (Middle)

C/O QUANTINUUM INC.

303 S TECHNOLOGY COURT

(Street)

BROOMFIELD COLORADO 80021

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Quantinuum Inc. [ QNT ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/04/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Class A Common Stock	06/04/2026		A		5,833(1)	A	$0	5,833	D
Class A Common Stock	06/05/2026		P		250,000	A	$60	255,833	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Represents an award of restricted stock units ("RSUs"), each of which represents a contingent right to receive one share of Class A Common Stock. The RSUs will vest in three equal annual installments beginning on June 5, 2027.

Remarks:

	/s/ Rajeeb Hazra, Attorney-in-Fact	06/08/2026
	** Signature of Reporting Person	Date
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.
* Form 4: SEC 1474 (03-26)

FAQ

What did Quantinuum (QNT) director Hal Barron buy in this Form 4 filing?

Hal Barron bought 250,000 shares of Quantinuum Class A Common Stock in an open-market transaction at $60.00 per share. This purchase increased his directly held common stock position to 255,833 shares immediately after the trade, according to the Form 4 data.

How many Quantinuum (QNT) shares does Hal Barron hold after these transactions?

After the open-market purchase, Hal Barron directly holds 255,833 shares of Quantinuum Class A Common Stock. In addition, he was granted 5,833 restricted stock units, which represent contingent rights to receive an equal number of shares once they vest on the disclosed schedule.

What RSU award did Hal Barron receive from Quantinuum (QNT)?

Hal Barron received an award of 5,833 restricted stock units (RSUs), each tied to one share of Quantinuum Class A Common Stock. These RSUs are not immediately payable; they vest in three equal annual installments beginning on June 5, 2027, subject to continued service conditions.

When do Hal Barron’s Quantinuum (QNT) RSUs start vesting and over what period?

The RSUs granted to Hal Barron start vesting on June 5, 2027. They vest in three equal annual installments beginning on that date, meaning one-third of the award vests each year over a three-year period, aligning his compensation with longer-term company performance.

Was Hal Barron’s Quantinuum (QNT) transaction an open-market purchase or a grant?

The Form 4 shows both. He made an open-market purchase of 250,000 Class A shares at $60.00 per share. Separately, he acquired 5,833 RSUs as a grant or award, with no cash price and a multi-year vesting schedule starting in 2027.