LMR Investment Managers report beneficial ownership of 1,915,455 Class A Ordinary Shares of Blue Acquisition Corp. As of March 31, 2026, those shares represent approximately 9.2% of the Class A Ordinary Shares outstanding, based on 20,892,250 shares outstanding as of February 19, 2026. The holdings are held directly by LMR Multi-Strategy Master Fund (1,540,455 shares) and LMR CCSA Master Fund (375,000 shares). Each fund also holds rights to receive 75,000 Class A Ordinary Shares upon the consummation of the issuer's initial business combination.
Positive
None.
Negative
None.
Insights
LMR reports a concentrated, passive stake of 1,915,455 Class A shares (9.2%) in Blue Acquisition Corp.
These shares are held by two master funds — 1,540,455 and 375,000 — with shared voting and dispositive power reported as of March 31, 2026. The filing is a standard Schedule 13G/A disclosure of beneficial ownership rather than an active trading notice.
Key dependencies include the issuer's outstanding share count (20,892,250 as of February 19, 2026) and the 75,000-share contingent rights held by each fund that vest upon the issuer's initial business combination. Subsequent filings would show any changes.
Key Figures
LMR aggregate holdings:1,915,455 sharesLMR Master Fund holdings:1,540,455 sharesLMR CCSA Master Fund holdings:375,000 shares+3 more
6 metrics
LMR aggregate holdings1,915,455 sharesBeneficial ownership as of March 31, 2026
LMR Master Fund holdings1,540,455 sharesHeld directly by LMR Multi-Strategy Master Fund
LMR CCSA Master Fund holdings375,000 sharesHeld directly by LMR CCSA Master Fund
Contingent rights75,000 shares (each fund)Rights to receive upon issuer's initial business combination
Percent of class9.2%Based on 20,892,250 shares outstanding as of February 19, 2026
Shares outstanding (context)20,892,250 sharesOutstanding as of February 19, 2026 (issuer 10-K)
Key Terms
Schedule 13G/A, beneficially owned, shared dispositive power, initial business combination
4 terms
Schedule 13G/Aregulatory
"Statement is filed by the LMR Investment Managers (cover page excerpt)"
A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.
beneficially ownedfinancial
"The Class A Ordinary Shares beneficially owned by the Reporting Persons are directly held by LMR Multi-Strategy Master Fund"
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 powerregulatory
"Shared Dispositive Power 1,915,455.00 (cover page excerpt)"
initial business combinationcorporate
"rights to receive 75,000 Class A Ordinary Shares upon the consummation of the Issuer's initial business combination"
An initial business combination is the deal in which a special-purpose acquisition company (SPAC) merges with or acquires an operating business to bring that business onto public markets. Think of the SPAC as an empty shell that raises money from investors, then uses that cash to buy a private company—this transaction turns the private company into a public one and often changes its ownership, valuation, and access to capital, so investors should watch for shifts in risk, future growth prospects, and shareholder rights.
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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
(Amendment No. 1)
Blue Acquisition Corp
(Name of Issuer)
Class A Ordinary Shares, par value $0.0001 per share
(Title of Class of Securities)
G1331A108
(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):
G1331A108
1
Names of Reporting Persons
LMR Partners LLP
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 KINGDOM
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
1,915,455.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
1,915,455.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
1,915,455.00
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)
9.2 %
12
Type of Reporting Person (See Instructions)
IA, PN
SCHEDULE 13G
CUSIP Number(s):
G1331A108
1
Names of Reporting Persons
LMR PARTNERS 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
HONG KONG
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
1,915,455.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
1,915,455.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
1,915,455.00
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)
9.2 %
12
Type of Reporting Person (See Instructions)
CO, IA
SCHEDULE 13G
CUSIP Number(s):
G1331A108
1
Names of Reporting Persons
LMR Partners 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
1,915,455.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
1,915,455.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
1,915,455.00
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)
9.2 %
12
Type of Reporting Person (See Instructions)
IA, OO
SCHEDULE 13G
CUSIP Number(s):
G1331A108
1
Names of Reporting Persons
LMR Partners AG
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
SWITZERLAND
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
1,915,455.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
1,915,455.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
1,915,455.00
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)
9.2 %
12
Type of Reporting Person (See Instructions)
CO, IA
SCHEDULE 13G
CUSIP Number(s):
G1331A108
1
Names of Reporting Persons
LMR PARTNERS (DIFC) 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
UNITED ARAB EMIRATES
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
1,915,455.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
1,915,455.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
1,915,455.00
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)
9.2 %
12
Type of Reporting Person (See Instructions)
CO, IA
SCHEDULE 13G
CUSIP Number(s):
G1331A108
1
Names of Reporting Persons
LMR Partners (Ireland) Limited
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
IRELAND
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
1,915,455.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
1,915,455.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
1,915,455.00
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)
9.2 %
12
Type of Reporting Person (See Instructions)
CO, IA
SCHEDULE 13G
CUSIP Number(s):
G1331A108
1
Names of Reporting Persons
Ben Levine
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 KINGDOM
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
1,915,455.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
1,915,455.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
1,915,455.00
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)
9.2 %
12
Type of Reporting Person (See Instructions)
HC, IN
SCHEDULE 13G
CUSIP Number(s):
G1331A108
1
Names of Reporting Persons
Stefan Renold
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
SWITZERLAND
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
1,915,455.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
1,915,455.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
1,915,455.00
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)
9.2 %
12
Type of Reporting Person (See Instructions)
HC, IN
SCHEDULE 13G
Item 1.
(a)
Name of issuer:
Blue Acquisition Corp
(b)
Address of issuer's principal executive offices:
1601 Anita Lane, Newport Beach, California, 92660-4803
Item 2.
(a)
Name of person filing:
This statement is filed by: (i) LMR Partners LLP, LMR Partners Limited, LMR Partners LLC, LMR Partners AG, LMR Partners (DIFC) Limited and LMR Partners (Ireland) Limited (collectively, the "LMR Investment Managers"), which serve as the investment managers to certain funds with respect to the shares of Class A Ordinary Shares, par value $0.0001 per share ("Class A Ordinary Shares"), held by certain funds; and (ii) Ben Levine and Stefan Renold, who are ultimately in control of the investment and voting decisions of the LMR Investment Managers with respect to the securities held by certain funds. The foregoing persons are hereinafter sometimes collectively referred to as the "Reporting Persons."
(b)
Address or principal business office or, if none, residence:
The address of the principal business office of each of the Reporting Persons is c/o LMR Partners LLP, 9th Floor, Devonshire House, 1 Mayfair Place, London, W1J 8AJ, United Kingdom.
(c)
Citizenship:
LMR Partners LLP is a United Kingdom limited liability partnership. LMR Partners Limited is a Hong Kong corporation. LMR Partners LLC is a Delaware limited liability company. LMR Partners AG is a Swiss corporation. LMR Partners (DIFC) Limited is a United Arab Emirates corporation. LMR Partners (Ireland) Limited is a limited company incorporated in Ireland. Ben Levine is a citizen of the United Kingdom. Stefan Renold is a citizen of Switzerland.
(d)
Title of class of securities:
Class A Ordinary Shares, par value $0.0001 per share
(e)
CUSIP No.:
G1331A108
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).
Investment Adviser
Item 4.
Ownership
(a)
Amount beneficially owned:
The information required by Items 4(a) - (c) is set forth in Rows 5 - 11 of the cover page for each of the Reporting Persons and is incorporated herein by reference.
As of March 31, 2026:
The Class A Ordinary Shares beneficially owned by the Reporting Persons are directly held by LMR Multi-Strategy Master Fund Limited ("LMR Master Fund") and LMR CCSA Master Fund Ltd ("LMR CCSA Master Fund"). LMR Master Fund directly holds 1,540,455 Class A Ordinary Shares and LMR CCSA Master Fund directly holds 375,000 Class A Ordinary Shares, with a total of 1,915,455 Class A Ordinary Shares in the aggregate (the "LMR Shares").
In addition to the LMR Shares, each of LMR Master Fund and LMR CCSA Master Fund also directly holds rights to receive 75,000 Class A Ordinary Shares upon the consummation of the Issuer's initial business combination.
(b)
Percent of class:
As of March 31, 2026:
The Class A Ordinary Shares held by LMR Master Fund and LMR CCSA Master Fund represent approximately 7.4% and 1.8%, respectively, and the LMR Shares in the aggregate represent approximately 9.2% of the outstanding Class A Ordinary Shares, based on 20,892,250 Class A Ordinary Shares of the Issuer outstanding as of February 19, 2026, as reported in the Issuer's Form 10-K filed with the Securities and Exchange Commission on February 19, 2026.
(c)
Number of shares as to which the person has:
(i) Sole power to vote or to direct the vote:
As of March 31, 2026, each of the Reporting Persons had sole power to vote or direct the vote of 0 Class A Ordinary Shares.
(ii) Shared power to vote or to direct the vote:
As of March 31, 2026, each of the Reporting Persons had shared power to vote or direct the vote of 1,915,455 Class A Ordinary Shares.
(iii) Sole power to dispose or to direct the disposition of:
As of March 31, 2026, each of the Reporting Persons had sole power to dispose or to direct the disposition of 0 Class A Ordinary Shares.
(iv) Shared power to dispose or to direct the disposition of:
As of March 31, 2026, each of the Reporting Persons had shared power to dispose or to direct the disposition of 1,915,455 Class A Ordinary Shares.
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.
The securities beneficially owned by the Reporting Persons are directly held by LMR Master Fund and LMR CCSA Master Fund, for which the LMR Investment Managers serve as the investment managers.
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.
By signing below I certify that, to the best of my knowledge and belief, the foreign regulatory scheme applicable to LMR Partners LLP, LMR Partners Limited, LMR Partners AG, LMR Partners (DIFC) Limited and LMR Partners (Ireland) Limited is substantially comparable to the regulatory scheme applicable to the functionally equivalent U.S. institution(s). I also undertake to furnish to the Commission staff, upon request, information that would otherwise be disclosed in a Schedule 13D.
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.
How many Blue Acquisition (BACC) shares does LMR report owning?
LMR reports beneficial ownership of 1,915,455 Class A Ordinary Shares. These are held as 1,540,455 and 375,000 shares by two master funds, totaling 1,915,455 as of March 31, 2026.
What percentage of BACC does the 1,915,455 shares represent?
The 1,915,455 shares represent approximately 9.2% of Class A Ordinary Shares outstanding. That percentage is calculated using 20,892,250 shares outstanding as of February 19, 2026, per the filing.
Are there any additional contingent share rights disclosed by LMR?
Yes. Each master fund also directly holds rights to receive 75,000 Class A Ordinary Shares upon the consummation of the issuer's initial business combination, as disclosed in the filing.
Who controls the investment decisions for the reported shares?
The filing states the shares are managed by the LMR Investment Managers collectively, with Ben Levine and Stefan Renold ultimately in control of investment and voting decisions for those managers.
Does the filing indicate sole voting or disposal power for LMR?
No. The filing reports 0 shares as sole power to vote or dispose; it discloses 1,915,455 shares under shared voting and dispositive power as of March 31, 2026.
