d'Ovidio Manfredi Lefebvre - 18 Mar 2026 Form 3 Insider Report for Arqit Quantum Inc. (ARQQ)

Role
Director
Signature
/s/ Noleen McDonnell, 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, 11:35:55 UTC
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Lefebvre d'Ovidio Manfredi Director C/O ARQIT INC., 1209 ORANGE STREET, WILMINGTON /s/ Noleen McDonnell, as Attorney-in-Fact 18 Mar 2026 0001840678

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
holding ARQQ Ordinary Shares 37,241 18 Mar 2026 Direct
holding ARQQ Ordinary Shares 4,396,891 18 Mar 2026 beneficially owned through Heritage Assets SCSP

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 Business Combination Warrants (right to buy) 18 Mar 2026 Ordinary Shares 29,865 beneficially owned through Heritage Assets SCSP F1
holding ARQQ Ordinary Share Purchase Warrants (right to buy) 18 Mar 2026 Ordinary Shares 4,600,000 $2.50 beneficially owned through Heritage Assets SCSP F2
holding ARQQ Ordinary Share Purchase Warrants (right to buy) 18 Mar 2026 Ordinary Shares 230,769 $19.50 beneficially owned through Heritage Assets SCSP F2
holding ARQQ Restricted Stock Units 18 Mar 2026 Ordinary Shares 100 Direct F3
holding ARQQ Restricted Stock Units 18 Mar 2026 Ordinary Shares 21,496 Direct F4
holding ARQQ Restricted Stock Units 18 Mar 2026 Ordinary Shares 1,751 Direct F5
holding ARQQ Restricted Stock Units 18 Mar 2026 Ordinary Shares 3,000 Direct F6
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Each Business Combination Warrant has an exercise price of $11.50 and can be exercised at any time, at the holder's election, to purchase 0.04 of an ARQQ ordinary share, and cannot be exercised for fractional shares. Accordingly, holders of Business Combination Warrants are required to exercise at least 25 Business Combination Warrants in order to receive one whole ARQQ ordinary share at an aggregate exercise price of $287.50 per whole ARQQ ordinary share. The reporting person beneficially owns 746,618 Business Combination Warrants, which, if exercised in full, would be equivalent to 29,864.72 ARQQ ordinary shares.
F2 Each Ordinary Share Purchase Warrant can be exercised at any time, at the holder's election, to purchase one ARQQ ordinary share.
F3 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.
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, and July 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.
F6 Each RSU represents a contingent right to receive one ARQQ ordinary share. 501 RSUs vest on April 1, 2026 and the remaining 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.

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