Arqit Quantum (ARQQ) director Stephen Chandler submits initial Form 3

Rhea-AI Filing Summary

Arqit Quantum Inc. director Stephen Charles Chandler filed an initial Form 3 to report his status as an insider of the company. The filing lists him as a director but does not report any buy, sell, or derivative transactions, serving as a baseline ownership disclosure.

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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

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1. Name and Address of Reporting Person^*

Chandler Stephen Charles

(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)

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

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)

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

Explanation of Responses:

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

No securities are beneficially owned.

	/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)

FAQ

What does the Arqit Quantum Inc. (ARQQ) Form 3 filing report?

The Form 3 for Arqit Quantum Inc. (ARQQ) reports that Stephen Charles Chandler is a director and therefore an insider. It serves as his initial ownership report and shows no buy, sell, or derivative transactions in the disclosed data.

Who is the reporting person in the Arqit Quantum (ARQQ) Form 3?

The reporting person is Stephen Charles Chandler, identified as a director of Arqit Quantum Inc. This filing establishes his insider status with the SEC and provides a baseline disclosure without listing any securities transactions in the provided information.

Does the Arqit Quantum (ARQQ) Form 3 show any stock purchases or sales?

No, the Form 3 data for Arqit Quantum Inc. (ARQQ) shows no stock purchases or sales. The transactions section is empty and the summary counts for buy, sell, and derivative activity are all zero, indicating no reported trades in this filing.

What insider activity is summarized in the ARQQ Form 3 transaction data?

The Form 3 transaction summary for ARQQ shows zero buys, zero sells, and zero exercises, gifts, or restructurings. It indicates no reported trading activity by the reporting person in this filing, only his status as a director and insider.

Are there any derivative positions disclosed in the Arqit Quantum (ARQQ) Form 3?

The Form 3 for Arqit Quantum Inc. (ARQQ) lists no derivative positions in the derivative summary. Counts for derivative transactions and exercises are zero, suggesting no options, warrants, or similar instruments are reported in this specific filing excerpt.