Oceaneering officer proposes $1.69M share sale

The prior-sales record lists 26,053 shares sold on May 12, 2026, and the acquisition history identifies restricted-stock vesting as compensation.

Accepted by SEC EDGAR 05/13/2026 - 04:09 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Oceaneering International Inc. (OII) officer Martin J. McDonald reported a proposed sale of 43,947 common shares, with an aggregate market value of $1,691,468.69 and an approximate sale date of May 13, 2026. The prior-sales record lists 26,053 shares sold on May 12, 2026, for gross proceeds of $998,679.77. The acquisition history lists restricted stock vesting as compensation.

Key Figures

Proposed sale: 43,947 common shares Aggregate market value: $1,691,468.69 Shares sold: 26,053 common shares +2 more

5 metrics

Proposed sale 43,947 common shares Approximate sale date: May 13, 2026

Aggregate market value $1,691,468.69 Proposed sale

Shares sold 26,053 common shares May 12, 2026

Gross proceeds $998,679.77 Sale on May 12, 2026

Shares outstanding 99,745,249 shares Reported in the securities information

Key Terms

Restricted Stock Vesting, Aggregate Market Value, Gross Proceeds

3 terms

Restricted Stock Vesting financial

"Restricted Stock Vesting"

Restricted stock vesting is the timetable and conditions under which shares granted to employees or insiders become fully owned and can be sold, typically requiring continued work or meeting performance goals. It matters to investors because large blocks of shares can become tradable at once, which can change share supply and price, and because vesting aligns insiders’ incentives with the company’s long‑term performance—think of it like a timed unlock that both rewards and locks in key people.

Aggregate Market Value financial

"Aggregate Market Value"

Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.

Gross Proceeds financial

"Gross Proceeds"

The total amount of cash a company receives from a financing event or sale before any fees, expenses, taxes or deductions are taken out. Investors watch gross proceeds because it shows the raw scale of new capital being raised—think of it as the paycheck amount before withholdings—which helps assess how much funding is available for operations, growth, debt payoff or how much shareholder dilution might occur once costs are removed.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many OII shares did Martin J. McDonald report as a proposed sale?

OII officer Martin J. McDonald reported a proposed sale of 43,947 common shares, with an aggregate market value of $1,691,468.69 and an approximate sale date of May 13, 2026.

How many OII shares did Martin J. McDonald sell in the prior three months?

Martin J. McDonald sold 26,053 common shares on May 12, 2026, for gross proceeds of $998,679.77.

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

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Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001661420
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	OCEANEERING INTERNATIONAL INC
SEC File Number	001-10945
Address of Issuer	5875 NORTH SAM HOUSTON PARKWAY WEST SUITE 400 HOUSTON TEXAS 77086
Phone	713-329-4500
Name of Person for Whose Account the Securities are To Be Sold	MCDONALD MARTIN J
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	43947	1691468.69	99745249	05/13/2026	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	02/24/2020	Restricted Stock Vesting	Issuer			3422	02/24/2020	Compensation
Common	03/01/2021	Restricted Stock Vesting	Issuer			6975	03/01/2021	Compensation
Common	02/28/2022	Restricted Stock Vesting	Issuer			9851	02/28/2022	Compensation
Common	02/27/2023	Restricted Stock Vesting	Issuer			11571	02/27/2023	Compensation
Common	02/26/2024	Restricted Stock Vesting	Issuer			12128	02/26/2024	Compensation

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
Martin Mcdonald 5875 North Sam Houston Parkway West Suite 400 Houston TX 77086	Common	05/12/2026	26053	998679.77

144: Remarks and Signature

Remarks
Date of Notice	05/13/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Emily Navaro, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Martin Mcdonald.
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)