Arqit Quantum (ARQQ) CEO sells shares after exercising RSUs

Filing Impact

(High)

Filing Sentiment

(Negative)

Form Type

Rhea-AI Filing Summary

Arqit Quantum Inc. Chief Executive Officer Andrew Leaver reported a combination of option exercise and share sale. On July 1, 2026, he exercised 15,625 Restricted Stock Units (RSUs), which convert into ordinary shares on a one-for-one basis, at a stated price of $0.0000 per share.

On July 2, 2026, he completed an open-market sale of 9,893 ordinary shares at an average price of $25.2026 per share. Following these transactions, he directly holds 51,483 ordinary shares. The filing also notes a multi-year RSU vesting schedule through January 1, 2029, indicating ongoing equity-based compensation.

Insider Trade Summary

Net Seller: 9,893 shares ($249,329)

Net Sell 3 txns

Insider Leaver Andrew

Role Chief Executive Officer

Sold 9,893 shs ($249K)

Type	Security	Shares	Price	Value
Sale	Ordinary Shares	9,893	$25.2026	$249K
Exercise	Restricted Stock Units	15,625	$0.00	--
Exercise	Ordinary Shares	15,625	$0.00	--

Holdings After Transaction: Ordinary Shares — 51,483 shares (Direct, null); Restricted Stock Units — 203,125 shares (Direct, null)

Footnotes (1)

The Restricted Share Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis. The RSUs vest quarterly in equal installments on July 1, and 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, and January 1, April 1, July 1, and October 1, 2029.

Key Figures

Shares sold: 9,893 shares Sale price: $25.2026 per share Shares held after sale: 51,483 shares +3 more

6 metrics

Shares sold 9,893 shares Ordinary shares sold on July 2, 2026 in open market

Sale price $25.2026 per share Average price for 9,893 ordinary shares sold

Shares held after sale 51,483 shares Direct ordinary share holdings following July 2, 2026 sale

RSUs exercised 15,625 units Restricted Stock Units converted into ordinary shares on July 1, 2026

RSU conversion price $0.0000 per unit Stated transaction price per share for RSU exercise

Net buy/sell direction net-sell of 9,893 shares Form 4 transaction summary for non-derivative share activity

Key Terms

Restricted Stock Units, open-market sale, derivative exercise/conversion, Form 4, +1 more

5 terms

Restricted Stock Units financial

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

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 sale financial

"transaction_action: "open-market sale" for 9,893 Ordinary Shares at $25.2026"

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

derivative exercise/conversion financial

"transaction_action: "derivative exercise/conversion" for 15,625 Restricted Stock Units"

Form 4 regulatory

"INSIDER FILING DATA (Form 4): details CEO transactions in ARQQ securities"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

vesting financial

"The RSUs vest quarterly in equal installments on specified dates through January 1, 2029."

Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 07/06/2026 - 05:14 PM Accepted by SEC EDGAR 07/06/2026 - 05:13 PM

FAQ

What insider transactions did Arqit Quantum (ARQQ) CEO Andrew Leaver report?

Arqit Quantum CEO Andrew Leaver exercised 15,625 Restricted Stock Units on July 1, 2026, then sold 9,893 ordinary shares on July 2, 2026. The sale was an open-market transaction reported in a Form 4 filing.

How many Arqit Quantum (ARQQ) shares did the CEO sell and at what price?

Andrew Leaver sold 9,893 Arqit Quantum ordinary shares at an average price of $25.2026 per share. The transaction was classified as an open-market sale in the Form 4 insider trading report.

How many Arqit Quantum (ARQQ) shares does the CEO hold after these transactions?

After the reported transactions, CEO Andrew Leaver directly holds 51,483 Arqit Quantum ordinary shares. This figure reflects his position following the July 2, 2026 open-market sale recorded in the Form 4.

What RSU activity did the Arqit Quantum (ARQQ) CEO report?

The CEO exercised 15,625 Restricted Stock Units on July 1, 2026, converting them into an equal number of ordinary shares at a stated conversion price of $0.0000 per share, according to the Form 4 data and related footnotes.

How do the Arqit Quantum (ARQQ) RSUs convert into ordinary shares?

The Restricted Share Units convert into Arqit Quantum ordinary shares on a one-for-one basis. A footnote in the Form 4 states that each RSU represents the right to receive one ARQQ ordinary share upon vesting and settlement.

What is the vesting schedule for the Arqit Quantum (ARQQ) CEO’s RSUs?

The RSUs vest quarterly in equal installments on specific dates from July 1, 2026 through January 1, 2029. The schedule includes vesting dates on July 1 and October 1 each year, plus January 1 and April 1 across the same period.

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^*

Leaver Andrew

(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)
	Chief Executive Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
07/01/2026

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	07/01/2026		M		15,625	A	$0⁽¹⁾	61,376	D
Ordinary Shares	07/02/2026		S		9,893	D	$25.2026	51,483	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 Stock Units	⁽¹⁾	07/01/2026		M			15,625	⁽²⁾	⁽²⁾	Ordinary Shares	15,625	$0	203,125	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 July 1, and 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, and January 1, April 1, July 1, and October 1, 2029.

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	07/06/2026
	** 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