Rhea-AI Sentiment reads the wording of the document, how positive or negative its language is on a 1 to 5 scale. The balance of points shown with the takes weighs what the document actually discloses, so the two can disagree, for example when a trial that missed its main goal is described in upbeat language.
SEACOR Marine Holdings Inc. common stock is reported as beneficially owned by P. Oppenheimer Investment Partnership, LP (530,010 shares), Oppenheimer-Close Investment Partnership, LP (147,961 shares), Oppenheimer + Close, LLC (705,086 shares), Oppvest, LLC (677,971 shares), and Carl K. Oppenheimer (1,383,057 shares).
Carl K. Oppenheimer’s reported beneficial ownership is 5.1% of the class; sole voting and dispositive power is reported over 780,737 shares. For Oppenheimer + Close, LLC, sole voting and dispositive power is reported over 102,766 shares.
Beneficial ownership — Oppvest, LLC677,971 sharesReported common stock ownership
Beneficial ownership — Carl K. Oppenheimer1,383,057 sharesReported common stock ownership
Beneficial ownership percentage — Carl K. Oppenheimer5.1%Percentage of the class
Key Terms
beneficially owned, Sole Voting Power, Sole Dispositive Power
3 terms
beneficially ownedregulatory
"Amount beneficially owned: 530,010"
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.
Sole Voting Powerregulatory
"Sole Voting Power 530,010.00"
Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.
Sole Dispositive Powerregulatory
"Sole Dispositive Power 530,010.00"
Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.
FAQ
AI-generated questions and answers. How Rhea-AI works. Not financial advice.
How many SMHI shares does Carl K. Oppenheimer beneficially own?
Carl K. Oppenheimer is reported as beneficially owning 1,383,057 shares, or 5.1% of SEACOR Marine Holdings Inc. common stock. Sole voting and dispositive power is reported over 780,737 shares.
How many SMHI shares are reported for the Oppenheimer-related entities?
Reported beneficial ownership is 530,010 shares for P. Oppenheimer Investment Partnership, LP; 147,961 shares for Oppenheimer-Close Investment Partnership, LP; 705,086 shares for Oppenheimer + Close, LLC; and 677,971 shares for Oppvest, LLC. Oppenheimer + Close, LLC has sole voting and dispositive power over 102,766 shares.
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
SEACOR Marine Holdings Inc.
(Name of Issuer)
Common Stock, par value $.01 per share
(Title of Class of Securities)
78413P101
(CUSIP Number)
09/30/2026
(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):
78413P101
1
Names of Reporting Persons
P. Oppenheimer Investment Parternship, LP
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
530,010.00
6
Shared Voting Power
0.00
7
Sole Dispositive Power
530,010.00
8
Shared Dispositive Power
0.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
530,010.00
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)
1.95 %
12
Type of Reporting Person (See Instructions)
PN
SCHEDULE 13G
CUSIP Number(s):
78413P101
1
Names of Reporting Persons
Oppenheimer-Close Investment Partnership, LP
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
147,961.00
6
Shared Voting Power
0.00
7
Sole Dispositive Power
147,961.00
8
Shared Dispositive Power
0.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
147,961.00
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)
0.55 %
12
Type of Reporting Person (See Instructions)
PN
SCHEDULE 13G
CUSIP Number(s):
78413P101
1
Names of Reporting Persons
Oppenheimer + Close, 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
102,766.00
6
Shared Voting Power
0.00
7
Sole Dispositive Power
102,766.00
8
Shared Dispositive Power
0.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
705,086.00
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)
2.6 %
12
Type of Reporting Person (See Instructions)
IA
SCHEDULE 13G
CUSIP Number(s):
78413P101
1
Names of Reporting Persons
Oppvest, 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
677,971.00
6
Shared Voting Power
0.00
7
Sole Dispositive Power
677,971.00
8
Shared Dispositive Power
0.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
677,971.00
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)
2.5 %
12
Type of Reporting Person (See Instructions)
OO, IA
SCHEDULE 13G
CUSIP Number(s):
78413P101
1
Names of Reporting Persons
Carl K. Oppenheimer
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
780,737.00
6
Shared Voting Power
0.00
7
Sole Dispositive Power
780,737.00
8
Shared Dispositive Power
0.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
1,383,057.00
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)
5.1 %
12
Type of Reporting Person (See Instructions)
IN
SCHEDULE 13G
Item 1.
(a)
Name of issuer:
SEACOR Marine Holdings Inc.
(b)
Address of issuer's principal executive offices:
12121 Wickchester Lane, Suite 500, Houston, TEXAS 77079
Item 2.
(a)
Name of person filing:
P. Oppenheimer Investment Partnership, LP
Oppenheimer-Close Investment Partnership, LP
Oppenheimer + Close, LLC
Oppvest, LLC
Carl K. Oppenheimer
(b)
Address or principal business office or, if none, residence:
119 West 57th Street
Suite 1515
New York, NY 10019
(c)
Citizenship:
Delaware
Delaware
Delaware
Delaware
USA
(d)
Title of class of securities:
Common Stock, par value $.01 per share
(e)
CUSIP Number(s):
78413P101
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:
530,010
147,961
705,086
677,971
1,383,057
(b)
Percent of class:
2.0%
0.6%
2.6%
2.5%
5.1%
(c)
Number of shares as to which the person has:
(i) Sole power to vote or to direct the vote:
530,010
147,961
102,766
677,971
780,737
(ii) Shared power to vote or to direct the vote:
0
0
0
0
0
(iii) Sole power to dispose or to direct the disposition of:
530,010
147,961
102,766
677,971
780,737
(iv) Shared power to dispose or to direct the disposition of:
0
0
0
0
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.
