SEACOR Marine (SMHI) SVP Rossmiller sells 3,223 shares under 10b5-1

Rhea-AI Filing Summary

SEACOR Marine Holdings Inc. officer Gregory Scott Rossmiller, SVP & CAO, reported selling 3,223 shares of Common Stock on July 15, 2026 at $8.50 per share in an open market or private transaction. The sale occurred automatically under a Rule 10b5-1 trading plan adopted on March 13, 2026, and left him holding 272,247 shares directly.

Insider Trade Summary 10b5-1

Net Seller: 3,223 shares

Net Sell 1 txn

Insider Rossmiller Gregory Scott

Role SVP & CAO

Sold 3,223 shs ($27K)

Type	Security	Shares	Price	Value
Sale	Common Stock F1	3,223	$8.50	$27K

Holdings After Transaction: Common Stock — 272,247 shares (Direct)

Footnotes (1)

1. F1. The reported sale of 3,223 shares occurred automatically pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 13, 2026.

Key Figures

Shares sold: 3,223 shares Sale price: $8.50 per share Shares held after transaction: 272,247 shares

3 metrics

Shares sold 3,223 shares Common Stock sale on July 15, 2026 by SVP & CAO

Sale price $8.50 per share Price for 3,223 Common Stock shares sold

Shares held after transaction 272,247 shares Direct Common Stock holdings after reported sale

Key Terms

Rule 10b5-1 trading plan, open market or private transaction, Common Stock

3 terms

Rule 10b5-1 trading plan regulatory

"occurred automatically pursuant to a Rule 10b5-1 trading plan"

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

open market or private transaction financial

"Sale in open market or private transaction"

Common Stock financial

"security_title: Common Stock for the reported sale"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 07/17/2026 - 05:10 PM Accepted by SEC EDGAR 07/17/2026 - 05:10 PM Learn about SEC filing dates

FAQ

What insider transaction did SMHI report for Gregory Scott Rossmiller?

SEACOR Marine’s SVP & CAO Gregory Scott Rossmiller sold 3,223 shares of Common Stock at $8.50 per share on July 15, 2026. After this automatic Rule 10b5-1 plan sale, he directly holds 272,247 shares.

At what price did the SMHI insider shares sell and on what date?

The reported SMHI insider sale executed at $8.50 per share on July 15, 2026. Gregory Scott Rossmiller disposed of 3,223 Common Stock shares in an open market or private transaction under a Rule 10b5-1 plan.

How many SEACOR Marine (SMHI) shares does Rossmiller hold after the sale?

Following the transaction, Gregory Scott Rossmiller directly holds 272,247 shares of SEACOR Marine Common Stock. This reflects his position after selling 3,223 shares at $8.50 per share under a Rule 10b5-1 trading plan.

Was the SMHI insider sale made under a Rule 10b5-1 trading plan?

Yes. The sale of 3,223 shares by Gregory Scott Rossmiller occurred automatically under a Rule 10b5-1 trading plan. The plan was adopted on March 13, 2026, and governed this July 15, 2026 transaction.

What role does the SMHI insider involved in this transaction hold?

The insider is Gregory Scott Rossmiller, who serves as SVP & CAO of SEACOR Marine Holdings Inc. He reported an automatic Rule 10b5-1 sale of 3,223 Common Stock shares, remaining with 272,247 shares directly owned.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

X

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Rossmiller Gregory Scott

(Last) (First) (Middle)

C/O SEACOR MARINE HOLDINGS INC.

12121 WICKCHESTER LANE, SUITE 500

(Street)

HOUSTON TEXAS 77079

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
SEACOR Marine Holdings Inc. [ SMHI ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP & CAO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
07/15/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	07/15/2026		S		3,223	D	$8.5	272,247	D(1)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The reported sale of 3,223 shares occurred automatically pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 13, 2026.

	/s/ Andrew H. Everett II, Attorney-in-Fact	07/17/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)