Arqit Quantum director granted 757 RSUs

Arqit Quantum Inc. reported that director Carlo Calabria received a grant of 757 Restricted Share Units (RSUs) on 2026-07-15 at a price of $0.0000 per unit.

Rhea-AI Filing Summary

Arqit Quantum Inc. reported that director Carlo Calabria received a grant of 757 Restricted Share Units (RSUs) on 2026-07-15 at a price of $0.0000 per unit. These RSUs convert into 757 ordinary shares on a one-for-one basis and vest within the week of the grant date. Following this award, Calabria holds 757 RSUs directly. As a foreign private issuer, Arqit Quantum states that these transactions are exempt from Sections 16(b) and 16(c) of the Securities Exchange Act.

Insider Trade Summary

Grant/Award: 757 shares

Grant/Award 1 txn

Insider Calabria Carlo

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Restricted Share Units F1	757	$0.00	$0.00

Holdings After Transaction: Restricted Share Units — 757 contracts (Direct)

Footnotes (1)

1. F1. Restricted Stock Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis. The RSUs vest within the week of the grant date.

Key Figures

RSUs granted: 757 Restricted Share Units Underlying ordinary shares: 757 Ordinary Shares Transaction price per RSU: $0.0000 +1 more

4 metrics

RSUs granted 757 Restricted Share Units Grant to director Carlo Calabria on 2026-07-15

Underlying ordinary shares 757 Ordinary Shares RSUs convert into ARQQ ordinary shares on a one-for-one basis

Transaction price per RSU $0.0000 Grant/award acquisition of Restricted Share Units

RSU holdings after grant 757 Restricted Share Units Total RSUs owned following the reported transaction

Key Terms

Restricted Share Units, foreign private issuer, Sections 16(b) and 16(c), Rule 3a12-3(b)

4 terms

Restricted Share Units financial

"Security title listed as "Restricted Share Units" for the grant"

Restricted share units (RSUs) are a promise from a company to give an employee or service provider actual shares or cash equal to the shares after certain conditions are met, typically staying with the company for a set time or hitting performance targets. Think of them like a time-locked gift card that becomes usable only after you’ve earned it. For investors, RSUs matter because they align employee incentives with company performance and can increase the number of shares outstanding over time, diluting existing ownership and affecting earnings per share.

foreign private issuer regulatory

"Due to the issuer's status as a foreign private issuer pursuant to Rule 3a12-3(b)"

A foreign private issuer is a company organized outside the United States that meets tests showing it is primarily foreign-controlled and therefore qualifies for a different set of U.S. reporting rules. For investors, that means the company files less frequent or differently formatted disclosures with U.S. regulators and may follow home-country accounting and governance practices, so buying its stock is like dining at a well-reviewed restaurant that follows its home kitchen’s rules instead of the local menu — you get access but should check what standards apply.

Sections 16(b) and 16(c) regulatory

"transactions in the issuer's securities are exempt from Sections 16(b) and 16(c) of the Act"

Rule 3a12-3(b) regulatory

"status as a foreign private issuer pursuant to Rule 3a12-3(b) under the Exchange Act"

FAQ

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

What insider transaction did Arqit Quantum (ARQQ) report for Carlo Calabria?

Arqit Quantum reported that director Carlo Calabria received a grant of 757 Restricted Share Units (RSUs). The award was made on 2026-07-15 at a price of $0.0000 per unit and is held as a direct ownership position.

How many RSUs were granted in the latest ARQQ Form 4 and what do they convert into?

The filing shows a grant of 757 Restricted Share Units to director Carlo Calabria. According to the footnote, these RSUs convert into ARQQ ordinary shares on a one-for-one basis, meaning they can settle into 757 ordinary shares upon conversion.

When do Carlo Calabria’s RSUs reported by ARQQ vest?

The RSUs are disclosed to vest within the week of the grant date. The grant date is 2026-07-15, so vesting occurs during the week following that date, after which the RSUs may convert into ordinary shares one-for-one.

How many RSUs does Carlo Calabria hold in ARQQ after the reported grant?

After the reported transaction, Carlo Calabria is shown holding 757 Restricted Share Units. The Form 4 lists this number as the total RSUs owned following the transaction, all held as a direct ownership position in Arqit Quantum Inc.

Was the ARQQ RSU grant to Carlo Calabria made under a Rule 10b5-1 trading plan?

The Form 4’s Rule 10b5-1 checkbox is not marked as affirming a trading plan. The structured data indicates no Rule 10b5-1 plan affirmation for this grant, so the filing does not identify it as made pursuant to such a plan.

How does ARQQ describe its regulatory status in relation to this insider transaction?

Arqit Quantum describes itself as a foreign private issuer under Rule 3a12-3(b) of the Exchange Act. It states that, due to this status, Carlo Calabria’s transactions in its securities are exempt from Sections 16(b) and 16(c) of the Act.

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

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Accepted by SEC EDGAR 07/17/2026 - 06:23 PM Learn about SEC filing dates

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^*

Calabria Carlo

(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)
07/15/2026

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

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
Restricted Share Units	(1)	07/15/2026		A		757		(1)	(1)	Ordinary Shares	757	$0	757	D

Explanation of Responses:

1. Restricted Stock Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis. The RSUs vest within the week of the grant date.

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. Ex.24 - Power of Attorney

	/s/ Noleen McDonnell, as Attorney-in-Fact	07/17/2026
	** 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)