Arqit director exercises 73,562 warrants at $2.50

Arqit Quantum Inc. director Ritchie Garth exercised Ordinary Share Purchase Warrants to acquire additional equity in the company.

Accepted by SEC EDGAR 06/05/2026 - 05:38 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Arqit Quantum Inc. director Ritchie Garth exercised Ordinary Share Purchase Warrants to acquire additional equity in the company. He exercised warrants covering 73,562 Ordinary Shares at an exercise price of $2.50 per share, converting a derivative position into common equity.

Following the exercise, Garth directly holds 104,249 Ordinary Shares of Arqit Quantum Inc. The warrants exercised relate to Ordinary Share Purchase Warrants that now show zero remaining derivative balance in this filing, indicating a full exercise of that specific warrant block with no same-day share sales reported.

Insider Trade Summary

73,562 shares exercised/converted

Exercise 2 txns

Insider Ritchie Garth

Role Director

Type	Security	Shares	Price	Value
Exercise	Ordinary Share Purchase Warrants (right to buy)	73,562	$0.00	$0.00
Exercise	Ordinary Shares	73,562	$2.50	$184K

Holdings After Transaction: Ordinary Share Purchase Warrants (right to buy) — 0 contracts (Direct); Ordinary Shares — 104,249 shares (Direct)

Holdings Before and After: Ordinary Share Purchase Warrants (right to buy), 73,562 to 0 contracts (Direct); Ordinary Shares, 30,687 to 104,249 shares (Direct)

Footnotes (1)

1. F1. Ordinary Share Purchase Warrants exercised at $2.50 per share for ARQQ ordinary shares.

Key Figures

Warrants Exercised: 73,562 shares Exercise Price: $2.50 per share Shares Held After: 104,249 shares +1 more

4 metrics

Warrants Exercised 73,562 shares Ordinary Share Purchase Warrants exercised into Ordinary Shares

Exercise Price $2.50 per share Exercise price of Ordinary Share Purchase Warrants

Shares Held After 104,249 shares Total Ordinary Shares directly owned after transactions

Derivative Shares After 0 shares Ordinary Share Purchase Warrants remaining after this exercise block

Key Terms

Ordinary Share Purchase Warrants, derivative security, exercise price

3 terms

Ordinary Share Purchase Warrants financial

"Ordinary Share Purchase Warrants (right to buy)"

Ordinary share purchase warrants are tradable securities that give the holder the right, but not the obligation, to buy a company’s ordinary shares at a set price (the exercise or strike price) during a specified time period. They matter to investors because they offer leveraged exposure to future share gains and can dilute existing shareholdings when exercised, while also serving as a way for companies to raise equity capital if holders convert them into shares.

derivative security financial

"transaction_code_description: Exercise or conversion of derivative security"

A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.

exercise price financial

"Ordinary Share Purchase Warrants exercised at $2.50 per share"

The exercise price is the fixed amount at which you can buy or sell an asset, like a stock, when using an options contract. It matters because it helps determine whether exercising the option will be profitable or not, depending on the current market price. Think of it as the set price you agree on today to buy or sell later.

FAQ

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

What insider transaction did Arqit Quantum Inc. (ARQQ) report for Ritchie Garth?

Arqit Quantum Inc. reported that director Ritchie Garth exercised Ordinary Share Purchase Warrants to acquire 73,562 Ordinary Shares. This transaction converted a derivative position into common equity without any reported same-day share sales in this Form 4 filing.

How many Arqit Quantum (ARQQ) shares does Ritchie Garth hold after this Form 4?

After exercising warrants, director Ritchie Garth directly holds 104,249 Ordinary Shares of Arqit Quantum Inc. The filing shows this figure as his total direct ownership following the reported transactions on the Form 4.

At what price did Ritchie Garth exercise Arqit Quantum (ARQQ) warrants?

Ritchie Garth exercised his Ordinary Share Purchase Warrants at an exercise price of $2.50 per share. The footnote specifies this price for converting the warrants into Arqit Quantum ordinary shares in the reported transaction.

Did the Arqit Quantum (ARQQ) Form 4 disclose any insider share sales?

The Form 4 for Arqit Quantum Inc. shows warrant exercises coded as “M” but no open-market sales. The transactions are characterized as exercises or conversions of derivative securities, with no sell transactions reported in this filing.

What derivative securities were involved in the Arqit Quantum (ARQQ) Form 4?

The Form 4 involves Ordinary Share Purchase Warrants, described as a right to buy Arqit Quantum Ordinary Shares. Garth exercised 73,562 warrant rights, and the derivative position from this specific warrant block shows zero shares remaining afterward.

When did Ritchie Garth’s Arqit Quantum (ARQQ) warrant exercise occur?

The warrant exercise by director Ritchie Garth occurred on 2026-06-05. On that date, he exercised Ordinary Share Purchase Warrants into 73,562 Arqit Quantum Ordinary Shares at an exercise price of $2.50 per share.

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

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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^*

Ritchie Garth

(Last) (First) (Middle)

3 ORCHARD PLACE

(Street)

LONDON SW1H 0BF

(City) (State) (Zip)

UNITED KINGDOM

(Country)

2. Issuer Name and Ticker or Trading Symbol
Arqit Quantum Inc. [ ARQQ ]

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)
06/05/2026

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
Ordinary Shares	06/05/2026		M		73,562	A	$2.5(1)	104,249	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
Ordinary Share Purchase Warrants (right to buy)	$2.5	06/05/2026		M			73,562	(1)	09/30/2026	Ordinary Shares	73,562	$0	0	D

Explanation of Responses:

1. Ordinary Share Purchase Warrants exercised at $2.50 per share for ARQQ ordinary shares.

Remarks:

Due to the issuer's status as a foreign private issuer pursuant to Rule 3a12-3(b) under the Securities Exchange Act of 1934 (the "Act"), the reporting person's transactions in the issuer's securities are exempt from Sections 16(b) and 16(c) of the Act.

	/s/ Noleen McDonnell, as Attorney-in-Fact	06/05/2026
	** 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)