Arqit Quantum counsel converts vested stock grants

The 150-, 695- and 306-unit tranches have quarterly vesting schedules running through July 1, 2027, October 1, 2027, and October 1, 2028, respectively.

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Form Type

Rhea-AI Filing Summary

Arqit Quantum Inc. General Counsel Patrick Willcocks reported that 695, 150 and 306 Restricted Share Units vested on October 1, 2026, converting one-for-one into the same respective numbers of ordinary shares. The ordinary-share entries report $0.00 per share. The tranches have quarterly vesting schedules running through July 1, 2027, October 1, 2027, and October 1, 2028, respectively.

Insider Trade Summary

1,151 shares exercised/converted

Exercise 6 txns

Insider Willcocks Patrick

Role General Counsel

Type	Security	Shares	Price	Value
Exercise	Restricted Share Units ^{F2, F1}	695	--	--
Exercise	Restricted Share Units ^{F3, F1}	150	--	--
Exercise	Restricted Share Units ^{F4, F1}	306	--	--
Exercise	Ordinary Shares ^F1	695	$0.00	$0.00
Exercise	Ordinary Shares ^F1	150	$0.00	$0.00
Exercise	Ordinary Shares ^F1	306	$0.00	$0.00

Holdings After Transaction: Restricted Share Units — 19,286 contracts (Direct); Ordinary Shares — 10,613 shares (Direct)

Footnotes (4)

F1. The Restricted Share Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis.
F2. The RSUs vest quarterly in equal installments on October 1, 2026, and January 1, April 1, July 1, and October 1, 2027.
F3. The RSUs vest quarterly in equal installments on October 1, 2026, and January 1, April 1, and July 1, 2027.
F4. The RSUs vest quarterly in equal installments on October 1, 2026, and January 1, April 1, July 1, and October 1, 2027, and January 1, April 1, July 1, and October 1, 2028.

Key Figures

RSUs converted / ordinary shares acquired: 695 RSUs / 695 ordinary shares RSUs converted / ordinary shares acquired: 150 RSUs / 150 ordinary shares RSUs converted / ordinary shares acquired: 306 RSUs / 306 ordinary shares +1 more

4 metrics

RSUs converted / ordinary shares acquired 695 RSUs / 695 ordinary shares October 1, 2026; one-for-one conversion

RSUs converted / ordinary shares acquired 150 RSUs / 150 ordinary shares October 1, 2026; one-for-one conversion

RSUs converted / ordinary shares acquired 306 RSUs / 306 ordinary shares October 1, 2026; one-for-one conversion

Reported price per ordinary share $0.00 per share Ordinary-share transaction entries dated October 1, 2026

Key Terms

Restricted Share Units, one-for-one basis, foreign private issuer

3 terms

one-for-one basis financial

"convert into ARQQ ordinary shares on a one-for-one basis"

foreign private issuer regulatory

"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.

FAQ

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

How many ARQQ shares did Patrick Willcocks receive?

On October 1, 2026, Patrick Willcocks reported three RSU conversions into ordinary shares: 695, 150 and 306 shares, each on a one-for-one basis.

When do Patrick Willcocks's ARQQ RSUs vest?

The three tranches have quarterly vesting schedules ending on July 1, 2027, October 1, 2027, and October 1, 2028, respectively. The 695-RSU tranche has installments on October 1, 2026, and January 1, April 1, July 1, and October 1, 2027. The 150-RSU tranche has installments on October 1, 2026, and January 1, April 1, and July 1, 2027.

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

Form 4 Insider Transactions: What Each Field Means →

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Available on EDGAR 10/05/2026 - 08:22 PM Accepted by SEC EDGAR 10/05/2026 - 08:21 PM

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^*

Willcocks Patrick

(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)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
10/01/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Ordinary Shares	10/01/2026		M		695	A	$0⁽¹⁾	10,157	D
Ordinary Shares	10/01/2026		M		150	A	$0⁽¹⁾	10,307	D
Ordinary Shares	10/01/2026		M		306	A	$0⁽¹⁾	10,613	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Restricted Share Units	⁽²⁾	10/01/2026		M			695	⁽²⁾	⁽²⁾	Ordinary Shares	695	⁽¹⁾	9,718	D
Restricted Share Units	⁽³⁾	10/01/2026		M			150	⁽³⁾	⁽³⁾	Ordinary Shares	150	⁽¹⁾	1,634	D
Restricted Share Units	⁽⁴⁾	10/01/2026		M			306	⁽⁴⁾	⁽⁴⁾	Ordinary Shares	306	⁽¹⁾	7,934	D

Explanation of Responses:

1. The Restricted Share Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis.

2. The RSUs vest quarterly in equal installments on October 1, 2026, and January 1, April 1, July 1, and October 1, 2027.

3. The RSUs vest quarterly in equal installments on October 1, 2026, and January 1, April 1, and July 1, 2027.

4. The RSUs vest quarterly in equal installments on October 1, 2026, and January 1, April 1, July 1, and October 1, 2027, and January 1, April 1, July 1, and October 1, 2028.

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	10/05/2026
	** 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)

Source: View Original Filing on SEC EDGAR