ARQQ CEO discloses RSU and share holdings

Arqit Quantum Inc. Chief Executive Officer Andrew Leaver has reported his initial ownership in a Form 3 filing.

Rhea-AI Filing Summary

Arqit Quantum Inc. Chief Executive Officer Andrew Leaver has reported his initial ownership in a Form 3 filing. He holds restricted stock units representing 234,375 ordinary shares, each RSU convertible into one ordinary share at no exercise price. These RSUs vest quarterly from April 1, 2026 through January 1, 2029 on specified dates. He also directly owns 37,721 ordinary shares, showing both current equity and a sizable, time-based compensation stake.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Leaver Andrew

Role Chief Executive Officer

Type	Security	Shares	Price	Value
holding	Restricted Stock Units	--	--	--
holding	Ordinary Shares	--	--	--

Holdings After Transaction: Restricted Stock Units — 234,375 contracts (Direct); Ordinary Shares — 37,721 shares (Direct)

Footnotes (1)

1. F1. Each restricted stock unit ("RSU") represents a contingent right to receive one ARQQ ordinary share. The RSUs vest quarterly in equal installments on April 1, 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.

FAQ

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

What insider position did ARQQ CEO Andrew Leaver report on this Form 3?

Andrew Leaver reported initial holdings of RSUs and ordinary shares. The filing shows 234,375 restricted stock units tied to ordinary shares and 37,721 ordinary shares held directly, outlining his starting equity position as Chief Executive Officer.

How many Arqit Quantum Inc. (ARQQ) RSUs does the CEO hold?

The CEO holds 234,375 restricted stock units. Each RSU represents a contingent right to receive one ARQQ ordinary share, providing significant potential future ownership as the units vest over the stated schedule.

What is the vesting schedule for ARQQ CEO Andrew Leaver’s RSUs?

The RSUs vest quarterly from 2026 through 2029. Vesting occurs in equal installments on April 1, July 1, and October 1, 2026, then January 1, April 1, July 1, and October 1 of 2027, 2028, and 2029.

How many ARQQ ordinary shares does the CEO directly own now?

The CEO directly owns 37,721 ordinary shares. This position reflects his current share ownership, separate from the larger pool of restricted stock units that will convert into shares only as they vest over time.

Do Andrew Leaver’s ARQQ RSUs require a cash exercise price?

The RSUs have a stated exercise price of 0.0000. This means each restricted stock unit converts into one ordinary share without additional cash payment when vesting and settlement conditions are satisfied.

What does this ARQQ Form 3 filing indicate for new investors?

The Form 3 establishes the CEO’s initial equity stake. It details both his existing ordinary shares and a substantial grant of time-vested RSUs, showing a compensation structure tied to future company performance and continued service.

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

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Accepted by SEC EDGAR 03/18/2026 - 11:11 AM Learn about SEC filing dates

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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:			3235-0104
Estimated average burden
hours per response:			0.5

1. Name and Address of Reporting Person^*

Leaver Andrew

(Last) (First) (Middle)

C/O ARQIT INC.

1209 ORANGE STREET

(Street)

WILMINGTON DELAWARE 19801

(City) (State) (Zip)

UNITED STATES

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
03/18/2026

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

3a. Foreign Trading Symbol

5. If Amendment, Date of Original Filed (Month/Day/Year)

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Executive Officer

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Ordinary Shares	37,721	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Stock Units	(1)	(1)	Ordinary Shares	234,375	(1)	D

Explanation of Responses:

1. Each restricted stock unit ("RSU") represents a contingent right to receive one ARQQ ordinary share. The RSUs vest quarterly in equal installments on April 1, 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/ Nicholas Pointon, as Attorney-in-Fact	03/18/2026
	** 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 5 (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 3: SEC 1473 (03-26)