# EDGAR Filing Document

**Accession Number:** 0001882923
**File Stem:** 0001104659-26-066263
**Filing Date:** 2026-5
**Character Count:** 22183
**Document Hash:** 65e4168d68d0b122b31eb664e35ac8dc
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001104659-26-066263.hdr.sgml**: 20260526

**ACCESSION NUMBER**: 0001104659-26-066263

**CONFORMED SUBMISSION TYPE**: SCHEDULE 13D/A

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260526

**DATE AS OF CHANGE**: 20260526

**SUBJECT COMPANY**: 

**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

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-92850
- **FILM NUMBER:** 261019789

**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
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Heritage Assets SCSp.
- **CENTRAL INDEX KEY:** 0001882923

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** N4
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A

**BUSINESS ADDRESS:**
- **STREET 1:** BLD ROYAL 8
- **CITY:** LUXEMBOURG
- **STATE:** N4
- **ZIP:** 2449
- **BUSINESS PHONE:** 377 97 97 63 19

**MAIL ADDRESS:**
- **STREET 1:** C/O HERITAGE SERVICES SAM
- **STREET 2:** 7 RUE DU GABIAN
- **CITY:** MONACO
- **STATE:** O9
- **ZIP:** 98000

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

## SCHEDULE 13D

### Under the Securities Exchange Act of 1934

**(Amendment No. 9)**

**Arqit Quantum Inc.**

*(Name of Issuer)*

**Ordinary Shares, par value $0.0025 per share**

*(Title of Class of Securities)*

**—**

*(CUSIP Number)*

**Heritage Assets SCSp**<br>c/o Heritage Services SAM<br>7 rue du Gabian<br>Monaco O9 98000<br>377 97 97 63 19

*(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)*

**05/21/2026**

*(Date of Event Which Requires Filing of this Statement)*

| **CUSIP No.** | **—** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Heritage Assets SCSp** | Name of reporting person<br>**Heritage Assets SCSp** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**AF** | Source of funds (See Instructions)<br>**AF** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**N4** | Citizenship or place of organization<br>**N4** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**9249963.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**9249963.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**9249963.00** | Aggregate amount beneficially owned by each reporting person<br>**9249963.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**38.4%** | Percent of class represented by amount in Row (11)<br>**38.4%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

**Comment for Reporting Person:** (Rows 8, 10 and 11) On a post-Reverse Stock Split (as defined herein) basis. On September 19, 2024, Arqit Quantum Inc., a Cayman Islands exempted limited liability company ("Arqit"), announced the implementation of a reverse stock split whereby every 25 outstanding ordinary shares of Arqit were consolidated into one ordinary share, par value $0.0025 per share (the "Ordinary Shares") (such consolidation, the "Reverse Stock Split"). The Ordinary Shares began trading on the Nasdaq Capital Market on a post-Reverse Stock Split basis on September 25, 2024. The CUSIP of the Ordinary Shares following the Reverse Stock Split is G0567U127.

| **CUSIP No.** | **—** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**M Management S.A.** | Name of reporting person<br>**M Management S.A.** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**AF** | Source of funds (See Instructions)<br>**AF** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**N4** | Citizenship or place of organization<br>**N4** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**9249963.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**9249963.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**9249963.00** | Aggregate amount beneficially owned by each reporting person<br>**9249963.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**38.4%** | Percent of class represented by amount in Row (11)<br>**38.4%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**OO** | Type of Reporting Person (See Instructions)<br>**OO** | |

---

**Comment for Reporting Person:** (Rows 8, 10 and 11) On a post-Reverse Stock Split basis. The Ordinary Shares began trading on the Nasdaq Capital Market on a post-Reverse Stock Split basis on September 25, 2024. The CUSIP of the Ordinary Shares following the Reverse Stock Split is G0567U127.

| **CUSIP No.** | **—** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Manfredi Lefebvre d'Ovidio** | Name of reporting person<br>**Manfredi Lefebvre d'Ovidio** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**AF** | Source of funds (See Instructions)<br>**AF** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**L6** | Citizenship or place of organization<br>**L6** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**48350.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**9249963.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**48350.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**9249963.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**9298313.00** | Aggregate amount beneficially owned by each reporting person<br>**9298313.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**38.6%** | Percent of class represented by amount in Row (11)<br>**38.6%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

**Comment for Reporting Person:** (Rows 8, 10 and 11) On a post-Reverse Stock Split basis. The Ordinary Shares began trading on the Nasdaq Capital Market on a post-Reverse Stock Split basis on September 25, 2024. The CUSIP of the Ordinary Shares following the Reverse Stock Split is G0567U127.

**Item 1. Security and Issuer**

**(a) Title of Class of Securities:**
Ordinary Shares, par value $0.0025 per share

**(b) Name of Issuer:**
Arqit Quantum Inc.

**(c) Address of Issuer's Principal Executive Offices:**
2nd Floor, 3 Orchard Place, London, X0, SW1H 0BF

This Amendment No. 9 to Schedule 13D (this "Amendment No. 9") is being filed by Heritage Assets SCSp, a Luxembourg company, M Management S.A., a Luxembourg company, and Manfredi Lefebvre d'Ovidio (collectively, the "Reporting Persons"), with respect to the Ordinary Shares of Arqit Quantum Inc., a Cayman Islands exempted limited liability company ("Arqit" or the "Issuer"), to amend the Schedule 13D filed by the Reporting Persons on September 14, 2021 (as amended on December 9, 2021, September 15, 2023, October 2, 2024, May 29, 2025, August 26, 2025, September 24, 2025, October 20, 2025 and November 12, 2025, the "Schedule 13D").

The class of equity security to which this Amendment No. 9 relates is the Ordinary Shares, par value $0.0025 per share, of the Issuer. The address of the principal executive offices of the Issuer is 2nd Floor, 3 Orchard Place, London SW1H 0BF, United Kingdom. Information given in response to each item shall be deemed incorporated by reference in all other items, as applicable.

**Item 4. Purpose of Transaction**

Item 4 of the Schedule 13D is amended by adding the following information:

This Amendment No. 9 is being filed to update the aggregate number of Ordinary Shares and percentage of Ordinary Shares of Arqit beneficially owned by the Reporting Persons due to the dilution caused by Arqit's issuance of additional Ordinary Shares from time to time since the date of the filing of Amendment No. 8 to Schedule 13D by the Reporting Persons on November 12, 2025 ("Amendment No. 8"), which resulted in a decrease of over one percent (1%) in the aggregate percentage ownership reported by the Reporting Persons in Amendment No. 8. In addition, this Amendment No. 9 contains information regarding the sale by the Reporting Persons of Business Combination Warrants (as defined in Arqit's Annual Report on Form 20-F for the fiscal year ended September 30, 2025, filed with the Securities and Exchange Commission (the "SEC") on December 9, 2025) on a post-Reverse Stock Split basis at the average prices set forth in the table below, in each case in open market transactions, since the information contained in Amendment No. 8.

Date of Transaction        Amount of Business        Average Price per
                                   Combination Warrants    Business Combination
                                                                               Warrant ($)
11/11/2025                      445                                 9.20
11/12/2025                      290                                 8.40
11/13/2025                      151                                 8.50
11/14//2025                     461                                 7.20
11/17/2025                      456                                 6.30
11/18/2025                      195                                 7.00
11/19/2025                      378                                 6.60
11/20/2025                      400                                 7.50
11/21/2025                      310                                 6.80
11/24/2025                      1,318                              5.50
11/25/2025                      196                                 5.60
11/26/2025                      536                                 6.40
11/28/2025                      103                                 8.50
12/1/2025                        61                                   8.40
12/2/2025                        129                                 8.40
12/3/2025                        163                                 9.10
12/4/2025                        322                                 10.40
12/5/2025                        302                                 9.8
12/8/2025                        353                                 10.10
12/9/2025                        30                                   9.70
12/10/2025                      128                                 8.70
12/11/2025                      21                                   8.70
12/12/2025                      1                                     8.70
12/15/2025                      99                                   8.60
12/16/2025                      133                                 8.30
12/17/2025                      45                                  7.90
12/18/2025                      374                                7.10
12/19/2025                      444                                6.00
12/22/2025                      463                                5.30
12/23/2025                      12                                  5.40
12/24/2025                      27                                  5.30
12/26/2025                      405                                4.50
12/29/2025                      488                                3.60
12/30/2025                      435                                3.70
12/31/2025                      294                                3.60
1/2/2025                          402                                4.70
1/5/2026                          186                                5.50
1/6/2026                           311                               5.20
1/7/2026                           85                                 5.30
1/8/2026                           8                                   5.30
1/9/2026                           102                               5.50
1/12/2026                         190                               5.00
1/13/2026                         10                                 5.00
1/14/2026                         99                                 5.00
1/15/2026                         76                                 5.20
1/16/2026                         197                               5.00
1/20/2026                         54                                 5.00
1/21/2026                         10                                 4.90
1/22/2026                         102                               5.00
1/23/2026                         60                                 4.70
1/26/2026                         42                                 4.70
1/27/2026                         104                               4.70
1/28/2026                         113                               4.30
1/29/2026                         106                               4.20
1/30/2026                         40                                 4.10
2/2/2026                           16                                 4.30
2/3/2026                           15                                 4.30
2/4/2026                           39                                 4.70
2/5/2026                           45                                 4.10
2/6/2026                           124                               4.20
2/9/2026                           75                                 4.40
2/10/2026                         97                                 4.30
2/11/2026                         116                               4.10
2/12/2026                         59                                 4.20
2/13/2026                         61                                 4.00
2/18/2026                         3                                   4.00
2/19/2026                         4                                   4.10
2/20/2026                         96                                  3.80
2/23/2026                         106                                3.70
2/24/2026                         24                                  3.70
2/25/2026                         173                                3.70
2/26/2026                         251                                3.70
2/27/2026                         37                                  3.70
3/2/2026                           31                                  3.70
3/3/2026                           15                                  3.50
3/4/2026                           179                                3.50
3/5/2026                           214                                3.40
3/6/2026                           332                                3.30
3/9/2026                           179                                3.30
3/10/2026                         24                                  3.40
3/11/2026                         8                                    3.30
3/12/2026                         12                                  3.40
3/13/2026                         20                                  3.30
4/15/2026                         713                                3.00
4/16/2026                         159                                3.10
4/17/2026                         151                                3.10
4/20/2026                         307                                2.80
4/21/2026                         103                                2.80
4/22/2026                         381                                3.10
4/23/2026                         182                                3.30
4/24/2026                         205                                2.90
4/27/2026                         41                                  2.90
4/28/2026                         421                                2.50
4/29/2026                         967                                2.30
4/30/2026                         91                                  2.30
5/1/2026                           402                                2.10
5/4/2026                           328                                2.10
5/5/2026                           68                                  2.30
5/6/2026                           404                                2.20
5/7/2026                           11                                  2.20
5/8/2026                           181                                2.10
5/11/2026                         112                                2.10
5/12/2026                         13                                  1.80
5/13/2026                         80                                  2.10
5/14/2026                         47                                  2.10
5/15/2026                         110                                2.00
5/18/2026                         106                                2.00
5/19/2026                         116                                1.60
5/20/2026                         72                                  1.90
5/21/2026                         787                                2.10
5/22/2026                         1,001                             1.90

**Item 5. Interest in Securities of the Issuer**

**(a)**
The responses of the Reporting Person with respect to Rows 7 through 13 of the respective cover pages of the individual Reporting Persons to this Amendment No. 9 are incorporated herein by reference.

The Reporting Persons' aggregate percentage of beneficial ownership is approximately 38.4% (or 38.6% with respect to Manfredi Lefebvre d'Ovidio) of the outstanding Ordinary Shares. Calculations of the percentage of Ordinary Shares beneficially owned are based on 24,090,585 Ordinary Shares outstanding (including Ordinary Shares that the Reporting Persons have a right to acquire within 60 days) as of May 19, 2026, based on information included in the Issuer's prospectus supplement filed pursuant to Rule 424(b)(3) with the SEC on May 21, 2026.

**(b)**
Except as set forth in this Amendment No. 9, none of the Reporting Persons has engaged in any transaction with respect to the Ordinary Shares since the date of the filing of Amendment No. 8.

**(c)**
Not applicable.

### SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Heritage Assets SCSp

**Signature:** By: M Management S.A., its Sole Manager and General Partner

**Name/Title:** Manfredi Lefebvre d'Ovidio/Director

**Date:** 05/26/2026

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** M Management S.A.

**Signature:** /s/ Manfredi Lefebvre d'Ovidio

**Name/Title:** Manfredi Lefebvre d'Ovidio/Director

**Date:** 05/26/2026

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Manfredi Lefebvre d'Ovidio

**Signature:** /s/ Manfredi Lefebvre d'Ovidio

**Name/Title:** Manfredi Lefebvre d'Ovidio

**Date:** 05/26/2026