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Muzero Acquisition Corp reports a disclosed 7.64% stake held by Adage-related reporting persons. The statement shows 1,575,000 Class A Ordinary Shares beneficially owned by Adage Capital Management, L.P., Robert Atchinson and Phillip Gross, calculated on 20,611,875 shares outstanding as of March 27, 2026.
The filings identify shared voting and dispositive power of 1,575,000 shares and list the reporting persons' business address. The submission is a Schedule 13G disclosure filed on March 31, 2026 with signatures dated May 13, 2026.
Insights
Adage reports a passive >5% holding with shared dispositive power.
Adage Capital Management, L.P., together with Robert Atchinson and Phillip Gross, report beneficial ownership of 1,575,000 shares, representing 7.64% of the class based on March 27, 2026 outstanding shares. The filing is a Schedule 13G, commonly used for passive investor disclosures.
Key dependencies include whether the position is maintained as passive under the schedule's conditions; subsequent amendments or conversion of status would require updated filings. Future filings may clarify any changes in voting or disposition arrangements.
Shared voting/dispositive power suggests entity-level control, not sole control by individuals.
The cover rows show 0 sole voting power and 1,575,000 shared voting and dispositive power. This attribution reflects holdings through Adage entities and confirms the reported 7.64% threshold for Schedule 13G treatment.
Watch for any future Schedule 13D or amendments that would indicate active intent; until then, the position is documented as a passive, shared-interest holding in public records.
Key Figures
Shares beneficially owned:1,575,000 sharesPercent of class:7.64%Shares outstanding:20,611,875 shares+1 more
4 metrics
Shares beneficially owned1,575,000 sharesdisclosed by Adage reporting persons
Percent of class7.64%based on outstanding shares as of March 27, 2026
Shares outstanding20,611,875 sharesas of March 27, 2026 (used for percent calculation)
"This statement is filed by: Adage Capital Management, L.P."
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.
Shared dispositive powerfinancial
"Shared Dispositive Power 1,575,000.00"
Beneficially ownedfinancial
"Amount beneficially owned: The information required by Item 4(a) is set forth"
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.
FAQ
AI-generated questions and answers. How Rhea-AI works. Not financial advice.
What stake does Adage report in Muzero Acquisition (MUZE)?
Adage-related reporting persons disclose ownership of 1,575,000 shares, equal to 7.64% of the class, measured against 20,611,875 shares outstanding as of March 27, 2026. The disclosure is on a Schedule 13G.
Which entities and individuals are listed as reporting persons?
The filing is made by Adage Capital Management, L.P. and individuals Robert Atchinson and Phillip Gross, each reported in their capacities tied to Adage entity management and shared dispositive power over the 1,575,000 shares.
How was the percent ownership calculated for MUZE?
The 7.64% figure is calculated using an aggregate of 20,611,875 Class A Ordinary Shares outstanding as of March 27, 2026, as reported in the company’s Form 10-K referenced in the Schedule 13G.
Does the filing indicate sole voting control of the shares?
No. The cover rows report 0 sole voting power and list 1,575,000 shared voting power, indicating the reported influence is shared among the Adage reporting persons.
When was the Schedule 13G filed and signed?
The Schedule 13G disclosure is dated March 31, 2026 on the cover and bears signatures dated May 13, 2026 from the reporting persons and entity representatives.
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
Muzero Acquisition Corp
(Name of Issuer)
Class A Ordinary Shares, par value $0.0001 per share
(Title of Class of Securities)
G8775A106
(CUSIP Number)
03/31/2026
(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):
G8775A106
1
Names of Reporting Persons
Adage Capital Management, L.P.
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
1,575,000.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
1,575,000.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
1,575,000.00
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)
7.64 %
12
Type of Reporting Person (See Instructions)
IA, PN
SCHEDULE 13G
CUSIP Number(s):
G8775A106
1
Names of Reporting Persons
Robert Atchinson
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
1,575,000.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
1,575,000.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
1,575,000.00
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)
7.64 %
12
Type of Reporting Person (See Instructions)
HC, IN
SCHEDULE 13G
CUSIP Number(s):
G8775A106
1
Names of Reporting Persons
Phillip Gross
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
1,575,000.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
1,575,000.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
1,575,000.00
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)
7.64 %
12
Type of Reporting Person (See Instructions)
HC, IN
SCHEDULE 13G
Item 1.
(a)
Name of issuer:
Muzero Acquisition Corp
(b)
Address of issuer's principal executive offices:
136 Madison Avenue, 6th Floor, New York, NY 10016
Item 2.
(a)
Name of person filing:
This statement is filed by:
(i) Adage Capital Management, L.P., a Delaware limited partnership ("ACM"), as the investment manager of Adage Capital Partners, L.P., a Delaware limited partnership ("ACP"), with respect to the Class A Ordinary Shares, par value $0.0001 per share ("Class A Ordinary Shares") of Muzero Acquisition Corp, a Cayman Islands exempted company (the "Company") directly held by ACP;
(ii) Robert Atchinson ("Mr. Atchinson"), as (1) managing member of Adage Capital Advisors, L.L.C., a limited liability company organized under the laws of the State of Delaware ("ACA"), managing member of Adage Capital Partners GP, L.L.C., a limited liability company organized under the laws of the State of Delaware ("ACPGP"), general partner of ACP, and (2) managing member of Adage Capital Partners, L.L.C., a Delaware limited liability company ("ACPLLC"), general partner of ACM, with respect to the Class A Ordinary Shares directly held by ACP; and
(iii) Phillip Gross ("Mr. Gross"), as (1) managing member of ACA, managing member of ACPGP, and (2) managing member of ACPLLC, general partner of ACM, with respect to the Class A Ordinary Shares directly held by ACP.
The foregoing persons are hereinafter sometimes collectively referred to as the "Reporting Persons." Any disclosures herein with respect to persons other than the Reporting Persons are made on information and belief after making inquiry to the appropriate party.
The filing of this statement should not be construed in and of itself as an admission by any Reporting Person as to beneficial ownership of the securities reported herein.
(b)
Address or principal business office or, if none, residence:
The address of the business office of each of the Reporting Persons is 200 Clarendon Street, 52nd Floor, Boston, Massachusetts 02116.
(c)
Citizenship:
ACM is a limited partnership organized under the laws of the State of Delaware. Messrs. Gross and Atchinson are citizens of the United States.
(d)
Title of class of securities:
Class A Ordinary Shares, par value $0.0001 per share
(e)
CUSIP Number(s):
G8775A106
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:
The information required by Item 4(a) is set forth in Row 9 of the cover page for each of the Reporting Persons and is incorporated herein by reference.
The percentage set forth in this Schedule 13G is calculated based upon an aggregate of 20,611,875 Class A Ordinary Shares outstanding as of March 27, 2026, as reported in the Company's Annual Report on Form 10-K for the year ended December 31, 2025, filed with the Securities and Exchange Commission on March 27, 2026.
(b)
Percent of class:
7.64%
(c)
Number of shares as to which the person has:
(i) Sole power to vote or to direct the vote:
The information required by Item 4(c)(i) is set forth in Row 5 of the cover page for each of the Reporting Persons and is incorporated herein by reference.
(ii) Shared power to vote or to direct the vote:
The information required by Item 4(c)(ii) is set forth in Row 6 of the cover page for each of the Reporting Persons and is incorporated herein by reference.
(iii) Sole power to dispose or to direct the disposition of:
The information required by Item 4(c)(iii) is set forth in Row 7 of the cover page for each of the Reporting Persons and is incorporated herein by reference.
(iv) Shared power to dispose or to direct the disposition of:
The information required by Item 4(c)(iv) is set forth in Row 8 of the cover page for each of the Reporting Persons and is incorporated herein by reference.
Item 5.
Ownership of 5 Percent or Less of a Class.
Not Applicable
Item 6.
Ownership of more than 5 Percent on Behalf of Another Person.
If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required.
See Item 2(a).
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.
Not Applicable
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 acquired and are held in the ordinary course of business and 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.
Adage Capital Management, L.P.
Signature:
/s/ Robert Atchinson
Name/Title:
By: Adage Capital Partners, L.L.C., its General Partner, By: Robert Atchinson, its Managing Member
