Garth Ritchie - 18 Mar 2026 Form 3 Insider Report for Arqit Quantum Inc. (ARQQ)

Role
Director
Signature
/s/ Nicholas Pointon, as Attorney-in-Fact
Issuer symbol
ARQQ
Transactions as of
18 Mar 2026
Net transactions value
$0
Form type
3
Filing time
18 Mar 2026, 11:16:30 UTC
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Ritchie Garth Director C/O ARQIT INC., 1209 ORANGE STREET, WILMINGTON /s/ Nicholas Pointon, as Attorney-in-Fact 18 Mar 2026 0001840684

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
holding ARQQ Ordinary Shares 28,261 18 Mar 2026 Direct

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
holding ARQQ Ordinary Share Purchase Warrants (right to buy) 18 Mar 2026 Ordinary Shares 73,562 $2.50 Direct F1
holding ARQQ Restricted Stock Units 18 Mar 2026 Ordinary Shares 100 Direct F2
holding ARQQ Restricted Stock Units 18 Mar 2026 Ordinary Shares 1,500 Direct F3
holding ARQQ Restricted Stock Units 18 Mar 2026 Ordinary Shares 1,751 Direct F4
holding ARQQ Restricted Stock Units 18 Mar 2026 Ordinary Shares 3,000 Direct F5
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Each Ordinary Share Purchase Warrant can be exercised at any time, at the holder's election, to purchase one ARQQ ordinary share.
F2 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, and July 1, 2026.
F3 Each 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, and July 1, 2027.
F4 Each 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.
F5 Each 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.

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