Arqit Quantum director exercises 673 RSUs

Arqit Quantum Inc. director Lefebvre d'Ovidio Manfredi exercised 673 restricted share units on July 17, 2026, receiving 673 ordinary shares at $0.0000 per share.

Rhea-AI Filing Summary

Arqit Quantum Inc. director Lefebvre d'Ovidio Manfredi exercised 673 restricted share units on July 17, 2026, receiving 673 ordinary shares at $0.0000 per share. This increased direct holdings to 49,023 ordinary shares, while a further 4,396,891 ordinary shares are reported as indirectly beneficially owned through Heritage Assets SCSP. The RSUs converted one-for-one into ordinary shares and vested within the week of grant. The company is treated as a foreign private issuer, so these transactions are exempt from Sections 16(b) and 16(c) of the Exchange Act, and the Rule 10b5-1 trading plan checkbox was not marked.

Insider Trade Summary

673 shares exercised/converted

Exercise 3 txns

Insider Lefebvre d'Ovidio Manfredi

Role Director

Type	Security	Shares	Price	Value
Exercise	Restricted Share Units F1	673	$0.00	$0.00
Exercise	Ordinary Shares F1	673	$0.00	$0.00
holding	Ordinary Shares	--	--	--

Holdings After Transaction: Restricted Share Units — 0 contracts (Direct); Ordinary Shares — 49,023 shares (Direct); Ordinary Shares — 4,396,891 shares (Indirect, beneficially owned through Heritage Assets SCSP)

Footnotes (1)

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

Key Figures

RSUs exercised: 673 shares Direct ordinary share holdings: 49,023 shares Indirect ordinary share holdings: 4,396,891 shares +1 more

4 metrics

RSUs exercised 673 shares Restricted Share Units exercised into ordinary shares on July 17, 2026

Direct ordinary share holdings 49,023 shares Direct Arqit Quantum ordinary shares held after the RSU conversion

Indirect ordinary share holdings 4,396,891 shares Ordinary shares beneficially owned indirectly through Heritage Assets SCSP

RSU exercise price 0.0000 per share Per-share price reported for the RSU conversion into ordinary shares

Key Terms

Restricted Share Units, foreign private issuer, beneficially owned

3 terms

Restricted Share Units financial

"Restricted Stock Units ("RSUs") convert into ARQQ ordinary shares"

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"

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.

beneficially owned financial

"Ordinary Shares beneficially owned through Heritage Assets SCSP"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

FAQ

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

What insider transaction did Arqit Quantum (ARQQ) report for July 17, 2026?

Arqit Quantum reported that director Lefebvre d'Ovidio Manfredi exercised 673 RSUs into 673 ordinary shares on July 17, 2026, at a reported price of $0.0000 per share, increasing direct share ownership.

How many Arqit Quantum (ARQQ) shares does Lefebvre d'Ovidio Manfredi now hold directly?

After the reported RSU conversion, Lefebvre d'Ovidio Manfredi holds 49,023 ordinary shares of Arqit Quantum directly. This figure reflects the total direct holdings following the exercise of 673 restricted share units into ordinary shares.

What indirect holdings in Arqit Quantum (ARQQ) are reported for Lefebvre d'Ovidio Manfredi?

In addition to direct holdings, the filing reports 4,396,891 ordinary shares of Arqit Quantum as beneficially owned indirectly through Heritage Assets SCSP. These shares are listed as indirect ownership separate from the 49,023 shares held directly.

What are the terms of the RSUs reported in the Arqit Quantum (ARQQ) Form 4?

The Form 4 states that the restricted share units (RSUs) convert into ARQQ ordinary shares on a one-for-one basis. It also notes that the RSUs vested within the week of the grant date before being converted into ordinary shares.

Is Arqit Quantum (ARQQ) treated as a foreign private issuer for this insider filing?

Yes. The filing notes Arqit Quantum is a foreign private issuer, so the reporting person’s transactions are exempt from Sections 16(b) and 16(c) of the Exchange Act. This affects how short-swing profit rules and certain insider reporting obligations apply.

Were the Arqit Quantum (ARQQ) insider transactions made under a Rule 10b5-1 plan?

The document-level Rule 10b5-1 checkbox is not marked, and aff_10b5_one is reported as false. This means the transactions were not reported as being conducted under a pre-arranged Rule 10b5-1 trading plan for 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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Accepted by SEC EDGAR 07/21/2026 - 02:10 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^*

Lefebvre d'Ovidio Manfredi

(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)
07/17/2026

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	07/17/2026		M		673	A	$0(1)	49,023	D
Ordinary Shares								4,396,891	I	beneficially owned through Heritage Assets SCSP

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)	07/17/2026		M			673	(1)	(1)	Ordinary Shares	673	$0	0	D

Explanation of Responses:

1. Restricted Stock Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis. The RSUs vested 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	07/21/2026
	** 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)