Blue Water Acquisition IV LLC and Joseph Hernandez report beneficial ownership of 5,066,667 Ordinary Shares. This consists of 275,000 Class A Ordinary Shares and 4,791,667 Class B Ordinary Shares (convertible one‑for‑one into Class A upon a business combination). The reported position represents 27.8% of 18,216,667 Ordinary Shares outstanding as of March 23, 2026. Joseph Hernandez is the sole managing member of the Sponsor and disclaims beneficial ownership of the Sponsor‑held securities except for any pecuniary interest.
Positive
None.
Negative
None.
Insights
Large sponsor stake disclosed; governance control via Class B shares is evident.
The filing shows 5,066,667 Ordinary Shares held of record by the Sponsor, including 4,791,667 Class B shares convertible into Class A on a one‑for‑one basis. The convertible Class B position typically conveys governance influence at key corporate events such as a business combination.
Watch subsequent filings for any change in voting arrangements or transfers; timing of conversion is tied to a business combination or holder option, per the issuer's charter.
The statement and joint filing agreement indicate the Sponsor and Mr. Hernandez filed jointly under Rule 13d‑1(k). Mr. Hernandez expressly disclaims beneficial ownership of securities held of record by the Sponsor except to the extent of any pecuniary interest.
Legal implications center on voting/dispositive power shown in Item 4; future amendments would be expected if transfers, exercises, or conversion events occur.
Key Figures
Total ordinary shares reported:5,066,667 sharesClass A ordinary shares:275,000 sharesClass B ordinary shares (convertible):4,791,667 shares+4 more
7 metrics
Total ordinary shares reported5,066,667 sharesreported in Items 5, 7 and 9
Class A ordinary shares275,000 sharesincluded in units acquired March 19, 2026
Class B ordinary shares (convertible)4,791,667 sharesconvertible one‑for‑one into Class A upon business combination
Percent of class27.8%based on 18,216,667 Ordinary Shares outstanding as of March 23, 2026
Shares outstanding (context)18,216,667 Ordinary Sharesas reported on the issuer's balance sheet as of March 23, 2026
Warrants issuable (excluded)137,500 sharesClass A Ordinary Shares issuable upon exercise of units' warrants
Warrant exercise price$11.50/shareexercise price for warrants comprising the units
Key Terms
Class B ordinary shares convertible, Private Units Subscription Agreement, redeemable warrant
3 terms
Class B ordinary shares convertiblefinancial
"4,791,667 Class B ordinary shares, which are convertible into Class A Ordinary Shares"
Private Units Subscription Agreementregulatory
"units acquired pursuant to a Private Units Subscription Agreement, dated March 19, 2026"
redeemable warrantfinancial
"one‑half of one redeemable warrant (each whole warrant entitles the holder to purchase one Class A Ordinary Share)"
A redeemable warrant is a financial tool that gives its holder the right to buy shares of a company at a fixed price within a certain period. If the holder chooses to do so, the company can buy back or cancel the warrant before it expires, often to encourage investment or manage share issuance. For investors, it provides an option to potentially buy shares at a favorable price while offering some flexibility for the issuing company.
What ownership stake does BWIV report for Blue Water Acquisition IV LLC and Joseph Hernandez?
They report beneficial ownership of 5,066,667 Ordinary Shares, representing 27.8% of outstanding shares based on March 23, 2026. This includes 275,000 Class A and 4,791,667 Class B shares convertible one‑for‑one into Class A.
How are the 5,066,667 Ordinary Shares composed in the BWIV filing?
The total comprises 275,000 Class A Ordinary Shares and 4,791,667 Class B Ordinary Shares. Class B shares convert one‑for‑one into Class A upon a business combination or earlier at the holder's option, per the issuer's charter.
Does Joseph Hernandez claim direct beneficial ownership of the Sponsor's shares in BWIV?
No. Mr. Hernandez states he is the sole managing member of the Sponsor and holds voting and investment discretion, but he expressly disclaims beneficial ownership of the Sponsor‑held securities except for any direct or indirect pecuniary interest.
Are there warrants or other exercisable securities referenced in the BWIV disclosure?
Yes. The filing excludes 137,500 Class A Ordinary Shares issuable upon exercise of warrants comprising units, and each whole warrant is exercisable at $11.50 per share, subject to adjustment as described in the issuer's charter.
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
Blue Water Acquisition Corp. IV
(Name of Issuer)
Class A Ordinary Shares, par value $0.0001 per share
(Title of Class of Securities)
G1368A104
(CUSIP Number)
03/19/2026
(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):
G1368A104
1
Names of Reporting Persons
Blue Water Acquisition IV 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
5,066,667.00
6
Shared Voting Power
0.00
7
Sole Dispositive Power
5,066,667.00
8
Shared Dispositive Power
0.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
5,066,667.00
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)
27.8 %
12
Type of Reporting Person (See Instructions)
OO
Comment for Type of Reporting Person: 5,066,667 Ordinary Shares (defined below) reported in Items 5, 7 and 9 consist of (1) 275,000 Class A ordinary shares, $0.0001 par value ("Class A Ordinary Shares") and (2) 4,791,667 Class B ordinary shares, $0.0001 par value ("Class B Ordinary Shares" and together with the Class A Ordinary Shares, the "Ordinary Shares"), which are convertible into Class A Ordinary Shares on a one-for-one basis upon the consummation of a business combination or earlier at the option of the holder, subject to adjustment as described in the Issuer's amended and restated memorandum and articles of association. The 275,000 Class A Ordinary Shares are included in units acquired pursuant to a Private Units Subscription Agreement, dated March 19, 2026, by and between Blue Water Acquisition IV LLC (the "Sponsor") and the Issuer. Each unit consists of one Class A Ordinary Share and one-half of one redeemable warrant (each whole warrant entitles the holder thereof to purchase one Class A Ordinary Share at a price of $11.50 per share, subject to adjustment). Excludes the 137,500 Class A Ordinary Shares issuable upon exercise of the warrants that comprise the units.
SCHEDULE 13G
CUSIP Number(s):
G1368A104
1
Names of Reporting Persons
Joseph Hernandez
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
5,066,667.00
6
Shared Voting Power
0.00
7
Sole Dispositive Power
5,066,667.00
8
Shared Dispositive Power
0.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
5,066,667.00
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)
27.8 %
12
Type of Reporting Person (See Instructions)
IN
Comment for Type of Reporting Person: 5,066,667 Ordinary Shares reported in Items 5, 7 and 9 consist of (1) 275,000 Class A Ordinary Shares and (2) 4,791,667 Class B Ordinary Shares, which are convertible into Class A Ordinary Shares on a one-for-one basis upon the consummation of a business combination or earlier at the option of the holder, subject to adjustment as described in the Issuer's amended and restated memorandum and articles of association. The 275,000 Class A Ordinary Shares are included in units acquired pursuant to a Private Units Subscription Agreement, dated March 19, 2026, by and between the Sponsor and the Issuer. Each unit consists of one Class A Ordinary Share and one-half of one redeemable warrant (each whole warrant entitles the holder thereof to purchase one Class A Ordinary Share at a price of $11.50 per share, subject to adjustment). Excludes the 137,500 Class A Ordinary Shares issuable upon exercise of the warrants that comprise the units. Joseph Hernandez, is the sole managing member of the Sponsor and holds voting and investment discretion with respect to the Ordinary Shares held of record by the Sponsor. Mr. Hernandez disclaims any beneficial ownership of the securities held by the Sponsor other than to the extent of any pecuniary interest he may have therein, directly or indirectly.
SCHEDULE 13G
Item 1.
(a)
Name of issuer:
Blue Water Acquisition Corp. IV
(b)
Address of issuer's principal executive offices:
15 E. Putnam Avenue, Suite 363, Greenwich, CT 06830
Item 2.
(a)
Name of person filing:
(i) Blue Water Acquisition IV LLC (the "Sponsor") and (ii) Joseph Hernandez. The Sponsor and Joseph Hernandez have entered into a Joint Filing Agreement, dated the date hereof, pursuant to which the Sponsor and Joseph Hernandez have agreed to file this statement and any subsequent amendments hereto jointly in accordance with the provisions of Rule 13d-1(k)(1) under the Act. Any disclosures herein with respect to persons other than the Sponsor and Joseph Hernandez are made on information and belief after making inquiry to the appropriate party. The filing of this statement should not be construed as an admission that any of the forgoing persons is, for the purposes of Section 13 of the Act, the beneficial owner of the Ordinary Shares reported herein.
(b)
Address or principal business office or, if none, residence:
c/o Blue Water Acquisition Corp. IV, 15 E. Putnam Avenue, Suite 363, Greenwich, CT 06830
(c)
Citizenship:
(i) Blue Water Acquisition IV LLC - Delaware (ii) Joseph Hernandez - United States
(d)
Title of class of securities:
Class A Ordinary Shares, par value $0.0001 per share
(e)
CUSIP Number(s):
G1368A104
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:
5,066,667 Ordinary Shares reported in Items 5, 7 and 9 consist of (1) 275,000 Class A Ordinary Shares and (2) 4,791,667 Class B Ordinary Shares, which are convertible into Class A Ordinary Shares on a one-for-one basis upon the consummation of a business combination or earlier at the option of the holder, subject to adjustment as described in the Issuer's amended and restated memorandum and articles of association. The 275,000 Class A Ordinary Shares are included in units acquired pursuant to a Private Units Subscription Agreement, dated March 19, 2026, by and between the Sponsor and the Issuer. Each unit consists of one Class A Ordinary Share and one-half of one redeemable warrant (each whole warrant entitles the holder thereof to purchase one Class A Ordinary Share at a price of $11.50 per share, subject to adjustment). Excludes the 137,500 Class A Ordinary Shares issuable upon exercise of the warrants that comprise the units.
Joseph Hernandez is the sole managing member of the Sponsor and holds voting and investment discretion with respect to the Ordinary Shares held of record by the Sponsor. Mr. Hernandez disclaims any beneficial ownership of the securities held by the Sponsor other than to the extent of any pecuniary interest he may have therein, directly or indirectly.
(b)
Percent of class:
27.8% (based on 18,216,667 Ordinary Shares outstanding as reported in the Issuer's Balance Sheet as of March 23, 2026 filed as Exhibit 99.1 to Form 8-K filed on March 27, 2026).
(c)
Number of shares as to which the person has:
(i) Sole power to vote or to direct the vote:
5,066,667 Ordinary Shares consisting of (i) 275,000 Class A Ordinary Shares and (ii) 4,791,667 Class B Ordinary Shares, which are convertible into Class A Ordinary Shares on a one-for-one basis upon the consummation of a business combination or earlier at the option of the holder, subject to adjustment as described in the Issuer's amended and restated memorandum and articles of association. Excludes the 137,500 Class A Ordinary Shares issuable upon exercise of the warrants that comprise the units owned of record by the Sponsor. Joseph Hernandez is the sole managing member of the Sponsor and holds voting and investment discretion with respect to the Ordinary Shares held of record by the Sponsor. Mr. Hernandez disclaims any beneficial ownership of the securities held by the Sponsor other than to the extent of any pecuniary interest he may have therein, directly or indirectly.
(ii) Shared power to vote or to direct the vote:
0
(iii) Sole power to dispose or to direct the disposition of:
5,066,667 Ordinary Shares consisting of (i) 275,000 Class A Ordinary Shares and (ii) 4,791,667 Class B Ordinary Shares, which are convertible into Class A Ordinary Shares on a one-for-one basis upon the consummation of a business combination or earlier at the option of the holder, subject to adjustment as described in the Issuer's amended and restated memorandum and articles of association. Excludes the 137,500 Class A Ordinary Shares issuable upon exercise of the warrants that comprise the units owned of record by the Sponsor. Joseph Hernandez is the sole managing member of the Sponsor and holds voting and investment discretion with respect to the Ordinary Shares held of record by the Sponsor. Mr. Hernandez disclaims any beneficial ownership of the securities held by the Sponsor other than to the extent of any pecuniary interest he may have therein, directly or indirectly.
(iv) Shared power to dispose or to direct the disposition of:
0
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.
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.
Not Applicable
Item 9.
Notice of Dissolution of Group.
Not Applicable
Item 10.
Certifications:
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.
Blue Water Acquisition IV LLC
Signature:
/s/ Joseph Hernandez
Name/Title:
Managing Member
Date:
04/15/2026
Joseph Hernandez
Signature:
/s/ Joseph Hernandez
Name/Title:
Joseph Hernandez
Date:
04/15/2026
Comments accompanying signature: Exhibit Information
Exhibit 1. Joint Filing Agreement pursuant to Rule 13d-1(k)
