Arqit Quantum Inc. Schedule 13G discloses group ownership positions related to Ordinary Shares following activity on 06/16/2026. The filing lists reporting persons ICS Opportunities, Ltd., Millennium Management LLC, Millennium Group Management LLC and Israel A. Englander and shows shared dispositive/control positions of 7,800 and 58,621 shares for certain filers. The filing states the reporting persons held more than 5% on 06/16/2026 but ceased to be beneficial owners of more than 5% by the filing date and attaches a joint filing agreement dated 06/22/2026.
Positive
None.
Negative
None.
Insights
Schedule 13G reports group holdings below the 5% reporting threshold by filing.
The filing lists multiple reporting persons and quantifies shared voting/dispositive positions of 7,800 and 58,621 shares respectively as shown on the cover pages. It also states the group exceeded 5% on 06/16/2026 and later fell below that level by the filing date.
Implications are limited: this is a passive ownership schedule that documents positions and a joint filing agreement dated 06/22/2026. Subsequent filings would show any material changes in ownership.
Key Figures
Date of >5% ownership:06/16/2026Joint filing agreement date:06/22/2026ICS Opportunities shared position:7,800 shares+4 more
7 metrics
Date of >5% ownership06/16/2026Date when reporting persons acquired beneficial ownership of more than 5%
Joint filing agreement date06/22/2026Date of Joint Filing Agreement among reporting persons
ICS Opportunities shared position7,800 sharesShared voting and dispositive power reported on cover page
Millennium-related shared position58,621 sharesShared voting and dispositive power reported for Millennium filers
Reported percent of class0.0% / 0.3%Percent of class shown on cover pages for filers
Class of securitiesOrdinary SharesOrdinary Shares, par value $0.0025 per share
CUSIPG0567U127CUSIP number for the Ordinary Shares
"Item 1. (a) Name of issuer: Arqit Quantum Inc.; form type is SCHEDULE 13G"
A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.
beneficially ownedregulatory
"Item 4. (a) Amount beneficially owned: See response to Item 9 on each cover page"
Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.
shared dispositive powerfinancial
"Cover pages list Shared Dispositive Power 58,621.00 and 7,800.00"
Rule 13d-3(d)(1)(i)regulatory
"Item 4(b) references shares deemed outstanding as provided in Rule 13d-3(d)(1)(i)"
See more from StockTitan in Google Search and AI answers.Adds StockTitan as a preferred source · opens Google
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
Arqit Quantum Inc.
(Name of Issuer)
Ordinary Shares, par value $0.0025 per share
(Title of Class of Securities)
G0567U127
(CUSIP Number)
06/16/2026
(Date of Event Which Requires Filing of this Statement)
Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
Rule 13d-1(b)
Rule 13d-1(c)
Rule 13d-1(d)
schemaVersion:
SCHEDULE 13G
CUSIP Number(s):
G0567U127
1
Names of Reporting Persons
ICS Opportunities, Ltd.
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
CAYMAN ISLANDS
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
7,800.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
7,800.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
7,800.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
0.0 %
12
Type of Reporting Person (See Instructions)
CO
SCHEDULE 13G
CUSIP Number(s):
G0567U127
1
Names of Reporting Persons
Millennium Management LLC
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
DELAWARE
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
58,621.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
58,621.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
58,621.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
0.3 %
12
Type of Reporting Person (See Instructions)
OO
SCHEDULE 13G
CUSIP Number(s):
G0567U127
1
Names of Reporting Persons
Millennium Group Management LLC
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
DELAWARE
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
58,621.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
58,621.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
58,621.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
0.3 %
12
Type of Reporting Person (See Instructions)
OO
SCHEDULE 13G
CUSIP Number(s):
G0567U127
1
Names of Reporting Persons
Israel A. Englander
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
UNITED STATES
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
58,621.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
58,621.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
58,621.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
0.3 %
12
Type of Reporting Person (See Instructions)
IN
SCHEDULE 13G
Item 1.
(a)
Name of issuer:
Arqit Quantum Inc.
(b)
Address of issuer's principal executive offices:
2nd Floor, 3 Orchard Place, London SW1H 0BF, United Kingdom
Item 2.
(a)
Name of person filing:
ICS Opportunities, Ltd.
Millennium Management LLC
Millennium Group Management LLC
Israel A. Englander
(b)
Address or principal business office or, if none, residence:
ICS Opportunities, Ltd.
c/o Millennium Management LLC
399 Park Avenue
New York, New York 10022
Millennium Management LLC
399 Park Avenue
New York, New York 10022
Millennium Group Management LLC
399 Park Avenue
New York, New York 10022
Israel A. Englander
c/o Millennium Management LLC
399 Park Avenue
New York, New York 10022
(c)
Citizenship:
ICS Opportunities, Ltd. - Cayman Islands
Millennium Management LLC - Delaware
Millennium Group Management LLC - Delaware
Israel A. Englander - United States
(d)
Title of class of securities:
Ordinary Shares, par value $0.0025 per share
(e)
CUSIP Number(s):
G0567U127
Item 3.
If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)
Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)
Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)
Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)
Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)
An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)
An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)
A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)
A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)
A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)
A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J),
please specify the type of institution:
(k)
Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.
Ownership
(a)
Amount beneficially owned:
See response to Item 9 on each cover page.
After acquiring beneficial ownership of more than 5% of the outstanding Ordinary Shares on June 16, 2026, the reporting persons ceased to be beneficial owners of more than 5% of the outstanding Ordinary Shares by the date of this filing.
(b)
Percent of class:
See response to Item 11 on each cover page.
For each reporting person, the percent of the class reported herein as beneficially owned by such reporting person gives effect to shares deemed to be outstanding as provided in Rule 13d-3(d)(1)(i), if any, presuming that all those warrants to purchase shares of the class reported herein that are held or otherwise controlled by any reporting person are exercisable within sixty days of the date hereof.
(c)
Number of shares as to which the person has:
(i) Sole power to vote or to direct the vote:
See response to Item 5 on each cover page.
(ii) Shared power to vote or to direct the vote:
See response to Item 6 on each cover page.
(iii) Sole power to dispose or to direct the disposition of:
See response to Item 7 on each cover page.
(iv) Shared power to dispose or to direct the disposition of:
See response to Item 8 on each cover page.
The securities disclosed herein as potentially beneficially owned by Millennium Management LLC, Millennium Group Management LLC and Mr. Englander are held by entities subject to voting control and investment discretion by Millennium Management LLC and/or other investment managers that may be controlled by Millennium Group Management LLC (the managing member of Millennium Management LLC) and Mr. Englander (the sole voting trustee of the managing member of Millennium Group Management LLC). The foregoing should not be construed in and of itself as an admission by Millennium Management LLC, Millennium Group Management LLC or Mr. Englander as to beneficial ownership of the securities held by such entities.
Item 5.
Ownership of 5 Percent or Less of a Class.
Ownership of 5 percent or less of a class
Item 6.
Ownership of more than 5 Percent on Behalf of Another Person.
Not Applicable
Item 7.
Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
Not Applicable
Item 8.
Identification and Classification of Members of the Group.
If a group has filed this schedule pursuant to §240.13d-1(b)(1)(ii)(K), so indicate under Item 3(k) and attach an exhibit stating the identity and Item 3 classification of each member of the group. If a group has filed this schedule pursuant to §240.13d-1(c) or §240.13d-1(d), attach an exhibit stating the identity of each member of the group.
See Exhibit I
Item 9.
Notice of Dissolution of Group.
Not Applicable
Item 10.
Certifications:
By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.
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.
Exhibit I: Joint Filing Agreement, dated as of June 22, 2026, by and among ICS Opportunities, Ltd., Millennium Management LLC, Millennium Group Management LLC and Israel A. Englander.
What does Arqit Quantum (ARQQ) Schedule 13G disclose about ownership?
The filing lists reporting persons and shared positions of 7,800 and 58,621 shares and notes the group held over 5% on 06/16/2026. It also states they ceased to be beneficial owners of more than 5% by the filing date.
Who filed the Schedule 13G for ARQQ?
The filing was submitted by ICS Opportunities, Ltd., Millennium Management LLC, Millennium Group Management LLC and Israel A. Englander, with signatures dated 06/22/2026 and an attached joint filing agreement.
Does the Schedule 13G indicate active trading or passive ownership for ARQQ?
This Schedule 13G is a passive ownership disclosure; it reflects beneficial/shared voting and dispositive positions of the reporting persons rather than an active acquisition narrative. The filing documents positions and a joint filing agreement dated 06/22/2026.
What shares and percentages are shown in the ARQQ filing?
Cover pages list shared dispositive/voting positions of 7,800 (ICS Opportunities) and 58,621 (Millennium-related filers) with reported percentage figures of 0.0% and 0.3% respectively as provided on those cover pages.
