Quantinuum director buys 8,334 shares at $60

Quantinuum Inc. director Eric Branderiz increased his stake through a mix of grant and open-market buying.

Accepted by SEC EDGAR 06/08/2026 - 04:31 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Quantinuum Inc. director Eric Branderiz increased his stake through a mix of grant and open-market buying. He received 5,833 shares of Class A Common Stock as a restricted stock unit (RSU) award on June 4, 2026, at a stated price of $0.00 per share. These RSUs vest in three equal annual installments beginning on June 5, 2027, each convertible into one share of Class A Common Stock.

On June 5, 2026, he made an open-market purchase of 8,334 shares at $60.00 per share. Following the purchase, his direct holdings reported in this filing rose to 14,167 shares of Class A Common Stock.

Insider Trade Summary

Net Buyer: 8,334 shares

Net Buy 2 txns

Insider Branderiz Eric

Role Director

Bought 8,334 shs ($500K)

Increase in Position 142.9%

Type	Security	Shares	Price	Value
Purchase	Class A Common Stock	8,334	$60.00	$500K
Grant/Award	Class A Common Stock	5,833	$0.00	$0.00

Holdings After Transaction: Class A Common Stock — 14,167 shares (Direct)

Holdings Before and After: Class A Common Stock, 0 to 14,167 shares (Direct)

Other Insiders: 10 other insiders reported open-market purchases of this stock in the 30 days up to this filing.

Footnotes (1)

1. F1. 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.

Key Figures

Open-market purchase: 8,334 shares at $60.00 RSU award size: 5,833 RSUs Holdings after purchase: 14,167 shares +1 more

4 metrics

Open-market purchase 8,334 shares at $60.00 Class A Common Stock bought on June 5, 2026

RSU award size 5,833 RSUs Grant of restricted stock units on June 4, 2026

Holdings after purchase 14,167 shares Direct Class A Common Stock position after June 5, 2026 trade

RSU vesting schedule 3 equal annual installments Vesting begins June 5, 2027 for RSU award

Key Terms

restricted stock units, open-market purchase, grant/award acquisition, Class A Common Stock

4 terms

restricted stock units financial

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

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

open-market purchase financial

"transaction_action": "open-market purchase""

An open-market purchase is when an investor or a company buys shares on a public stock exchange at the going market price, rather than through a private deal. It matters to investors because these purchases change how many shares are available, can push the stock price up or signal confidence from large buyers, and often affect per-share metrics like earnings—think of it like someone buying lots of apples off a grocery shelf, reducing supply and potentially raising the price.

grant/award acquisition financial

"transaction_action": "grant/award acquisition""

Class A Common Stock financial

"security_title": "Class A Common Stock""

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.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transactions did Quantinuum (QNT) director Eric Branderiz report?

Eric Branderiz reported two acquisitions of Quantinuum Class A Common Stock. He received 5,833 shares as a restricted stock unit award and separately purchased 8,334 shares in an open-market transaction, increasing his reported direct holdings to 14,167 shares.

How many Quantinuum (QNT) shares did Eric Branderiz buy on the open market?

Eric Branderiz bought 8,334 shares of Quantinuum Class A Common Stock in an open-market transaction. The purchase price was $60.00 per share, and the trade occurred on June 5, 2026, according to the Form 4 insider filing.

What are the terms of Eric Branderiz’s RSU award in Quantinuum (QNT)?

Branderiz received an award of 5,833 restricted stock units, each representing one share of Class A Common Stock. The RSUs vest in three equal annual installments beginning on June 5, 2027, creating a multi-year, time-based vesting schedule tied to continued service.

How many Quantinuum (QNT) shares does Eric Branderiz hold after these transactions?

After the reported open-market purchase, Branderiz’s direct holdings rose to 14,167 shares of Class A Common Stock. This figure reflects his position following the June 5, 2026 transaction disclosed in the Form 4 filing.

Were any of Eric Branderiz’s Quantinuum (QNT) transactions sales or disposals?

No, the filing shows only acquisition-side activity for Branderiz. He received 5,833 shares through a restricted stock unit award and bought 8,334 shares in an open-market purchase, with no reported sales or other dispositions in this Form 4.

AI-generated analysis. How Rhea-AI works. Not financial advice.

Form 4 Insider Transactions: What Each Field Means →

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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^*

Branderiz Eric

(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		8,334	A	$60	14,167	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)