# EDGAR Filing Document

**Accession Number:** 0001840678
**File Stem:** 0001859690-26-000035
**Filing Date:** 2026-3
**Character Count:** 10625
**Document Hash:** 2625c6c3144becd8fcba67db7c05dbb5
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001859690-26-000035.hdr.sgml**: 20260318

**ACCESSION NUMBER**: 0001859690-26-000035

**CONFORMED SUBMISSION TYPE**: 3

**PUBLIC DOCUMENT COUNT**: 2

**CONFORMED PERIOD OF REPORT**: 20260318

**FILED AS OF DATE**: 20260318

**DATE AS OF CHANGE**: 20260318

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Lefebvre d'Ovidio Manfredi
- **CENTRAL INDEX KEY:** 0001840678

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 3
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-40777
- **FILM NUMBER:** 26767013

**MAIL ADDRESS:**
- **STREET 1:** 7 RUE DU GABIAN
- **CITY:** MONACO
- **STATE:** O9
- **ZIP:** 98000
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Arqit Quantum Inc.
- **CENTRAL INDEX KEY:** 0001859690
- **STANDARD INDUSTRIAL CLASSIFICATION:** SERVICES-PREPACKAGED SOFTWARE [7372]
- **ORGANIZATION NAME:** 06 Technology
- **EIN:** 000000000
- **STATE OF INCORPORATION:** E9
- **FISCAL YEAR END:** 0930

**BUSINESS ADDRESS:**
- **STREET 1:** 3 ORCHARD PLACE
- **CITY:** LONDON
- **STATE:** X0
- **ZIP:** SW1H 0BF
- **BUSINESS PHONE:** 44 203 91 70155

**MAIL ADDRESS:**
- **STREET 1:** 3 ORCHARD PLACE
- **CITY:** LONDON
- **STATE:** X0
- **ZIP:** SW1H 0BF

## Ex-24

```

POWER OF ATTORNEY

	The undersigned does hereby constitute and appoint Patrick Willcocks and
Noleen McDonnell as the undersigned?s true and lawful attorneys-in-fact to, as
applicable: (1)	execute for and on behalf of the undersigned, in the
undersigned?s capacity as an officer or director of Arqit Quantum Inc. (the
?Company?), and submit to the U.S. Securities and Exchange Commission (?SEC?) a
Form ID, including amendments thereto, and any other documents necessary or
appropriate to obtain codes and passwords enabling the undersigned to make
electronic filings with the SEC of reports required by Section 16(a) of the
Securities Exchange Act of 1934 (the ?Exchange Act?) and the rules thereunder
and any amendments to the foregoing; (2)	execute for and on behalf of the
undersigned, in the undersigned?s capacity as an officer or director of the
Company, Forms 3, 4 and 5 in accordance with Section 16(a) of the Exchange Act
and the rules thereunder and any amendments to the foregoing; (3)	do and
perform any and all acts for and on behalf of the undersigned which may be
necessary or desirable to complete and execute any such Forms 3, 4 or 5,
complete and execute any amendment or amendments thereto, and timely file such
form with the SEC and any stock exchange or similar authority; and (4)	take any
other action of any type whatsoever in connection with the foregoing which, in
the opinion of such attorney-in-fact, may be of benefit to, in the best
interest of, or legally required by, the undersigned, it being understood that
the documents executed by such attorney-in-fact on behalf of the undersigned
pursuant to this Power of Attorney shall be in such form and shall contain such
terms and conditions as such attorney-in-fact may approve to such
attorney-in-fact?s discretion. The undersigned hereby grants to each such
attorney-in-fact full power and authority to do and perform any and every act
and thing whatsoever requisite, necessary, or proper to be done in the exercise
of any of the rights and powers herein granted, as fully to all intents and
purposes as the undersigned might or could do if personally present, with full
power of substitution or revocation, hereby ratifying and confirming all that
such attorney-in-fact, or such attorney-in-fact?s substitute or substitutes,
shall lawfully do or cause to be done by virtue of this Power of Attorney and
the rights and powers herein granted. The undersigned acknowledges that the
foregoing attorneys-in-fact, in serving in such capacity at the request of the
undersigned, are not assuming, nor is the Company assuming, any of the
undersigned?s responsibilities to comply with Section 16 of the Exchange Act.
This Power of Attorney shall remain in full force and effect until (1) the
undersigned is no longer required to file Forms 3, 4 and 5, as applicable, with
respect to the undersigned?s holdings of and transactions in securities issued
by the Company, or (2) any attorney-in-fact is no longer employed by the
Company or its subsidiaries, in which case this Power of Attorney will be
revoked solely with respect to such attorney-in-fact, and will otherwise remain
in full force and effect, unless earlier revoked by the undersigned in a signed
writing delivered to the foregoing attorneys-in-fact. IN WITNESS WHEREOF, the
undersigned has caused this Power of Attorney to be executed as of the 11th day
of March, 2026. By: /s/ Manfredi d?Ovidio Lefebvre 		Manfredi d?Ovidio Lefebvre

```

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

## FORM 3

### INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Lefebvre d'Ovidio Manfredi<br><sub>(Last) (First) (Middle)</sub><br>C/O ARQIT INC.<br>1209 ORANGE STREET<br><sub>(Street)</sub><br>WILMINGTON, DE 19801<br><sub>(City) (State) (Zip)</sub> | **3. Issuer Name and Ticker or Trading Symbol**<br>Arqit Quantum Inc. [ ARQQ ] | **5. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  |
| **2. Date of Event Requiring Statement (Month/Day/Year)**<br>2026-03-18 | **4. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director   [ ] 10% Owner<br>[ ] Officer (give title below)   [ ] Other (specify below)<br>_ _ | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities Beneficially Owned

---

|  |  |  |  |
| --- | --- | --- | --- |
| 1. Title of Security | 2. Amount of Securities Beneficially Owned | 3. Ownership Form | 4. Nature of Indirect Beneficial Ownership |
| Ordinary Shares | 37241 | D |  |
| Ordinary Shares | 4396891 | I | beneficially owned through Heritage Assets SCSP |

---

## Table II - Derivative Securities Beneficially Owned

---

|  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 3. Title and Amount of Underlying Securities | 3. Title and Amount of Underlying Securities | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
| Business Combination Warrants (right to buy) | <sup>(1)</sup> | 2026-09-03 | Ordinary Shares | 29864.72 | <sup>(1)</sup> | I | beneficially owned through Heritage Assets SCSP |
| Ordinary Share Purchase Warrants (right to buy) | <sup>(2)</sup> | 2026-09-30 | Ordinary Shares | 4600000 | $2.50 | I | beneficially owned through Heritage Assets SCSP |
| Ordinary Share Purchase Warrants (right to buy) | <sup>(2)</sup> | 2028-09-12 | Ordinary Shares | 230769 | $19.50 | I | beneficially owned through Heritage Assets SCSP |
| Restricted Stock Units | <sup>(3)</sup> | <sup>(3)</sup> | Ordinary Shares | 100 | <sup>(3)</sup> | D |  |
| Restricted Stock Units | <sup>(4)</sup> | <sup>(4)</sup> | Ordinary Shares | 21496 | <sup>(4)</sup> | D |  |
| Restricted Stock Units | <sup>(5)</sup> | <sup>(5)</sup> | Ordinary Shares | 1751 | <sup>(5)</sup> | D |  |
| Restricted Stock Units | <sup>(6)</sup> | <sup>(6)</sup> | Ordinary Shares | 3000 | <sup>(6)</sup> | D |  |

---

### Footnotes:

(1) 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.

(2) Each Ordinary Share Purchase Warrant can be exercised at any time, at the holder's election, to purchase one ARQQ ordinary share.

(3) 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.

(4) 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.

(5) 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.

(6) 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

**Signature:** /s/ Noleen McDonnell, as Attorney-in-Fact  
**Date:** 2026-03-18

### Remarks:

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.**