Hornbeck Offshore ex-officer plans $2.24M stock sale

HORNBECK OFFSHORE SERVICES, INC.

Rhea-AI Filing Summary

HORNBECK OFFSHORE SERVICES, INC. (HOS) is the issuer of common stock for which former officer Erik S. Staffeldt has filed a notice to sell shares under Rule 144. The notice covers 253,723 shares of common stock, with an aggregate market value of $2,237,671.86, based on an outstanding share count of 147,382,447 shares. The proposed sales are expected to occur on or about September 15, 2026 on the NYSE. The filing also lists several prior common stock sales by Staffeldt during the past three months.

Key Figures

Shares to be sold under Rule 144: 253,723 shares Aggregate market value of planned sale: $2,237,671.86 Shares outstanding: 147,382,447 shares +4 more

7 metrics

Shares to be sold under Rule 144 253,723 shares Planned sale of HORNBECK OFFSHORE SERVICES, INC. common stock

Aggregate market value of planned sale $2,237,671.86 Estimated value of 253,723 shares to be sold

Shares outstanding 147,382,447 shares Outstanding HORNBECK OFFSHORE SERVICES, INC. common stock referenced in the notice

Sale on September 2, 2026 117,619 shares for $1,222,070.09 Past 3 months’ sale of HOS common stock by Erik S. Staffeldt

Sale on September 3, 2026 130,635 shares for $1,275,873.45 Past 3 months’ sale of HOS common stock by Erik S. Staffeldt

Sale on September 8, 2026 50,911 shares for $464,512.11 Past 3 months’ sale of HOS common stock by Erik S. Staffeldt

Sale on September 9, 2026 107,081 shares for $976,149.08 Past 3 months’ sale of HOS common stock by Erik S. Staffeldt

Key Terms

Rule 144, Restricted Stock Vesting, aggregate market value, attorney-in-fact

4 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Restricted Stock Vesting financial

"Common | 01/02/2021 | Restricted Stock Vesting | Issuer"

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

"253723 | 2237671.86 | 147382447 | 09/15/2026"

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.

attorney-in-fact regulatory

"as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Erik"

An attorney-in-fact is the person or entity given legal authority through a power of attorney to act on behalf of another for specific tasks, such as signing documents, voting shares, or handling transactions. For investors, this matters because it lets a trusted representative make timely decisions or complete paperwork when the owner cannot, much like handing keys to someone to run errands on your behalf—so checks on scope and limits of that authority are important.

FAQ

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

What does the Form 144 filing for HOS disclose about planned share sales?

The filing states that 253,723 shares of HORNBECK OFFSHORE SERVICES, INC. common stock are planned to be sold under Rule 144, with an aggregate market value of $2,237,671.86, and an anticipated sale date of September 15, 2026 on the NYSE.

How many HOS shares are outstanding according to this Form 144?

The Form 144 lists 147,382,447 shares of HORNBECK OFFSHORE SERVICES, INC. common stock as outstanding, providing context for the size of the proposed Rule 144 sale.

Who is selling HOS shares under this Form 144 notice?

The notice is filed for the account of Erik S. Staffeldt, identified as a former officer of HORNBECK OFFSHORE SERVICES, INC. Fidelity Brokerage Services LLC is involved as the broker, and the form is signed by an attorney-in-fact for Staffeldt.

What prior HOS share sales by Erik S. Staffeldt are disclosed?

The filing lists four recent sales: 117,619 shares on September 2, 2026 for $1,222,070.09; 130,635 shares on September 3, 2026 for $1,275,873.45; 50,911 shares on September 8, 2026 for $464,512.11; and 107,081 shares on September 9, 2026 for $976,149.08.

What is the source of the HOS shares to be sold under Rule 144?

The shares derive from restricted stock vesting granted by the issuer. The filing lists multiple vesting dates, including January 3, 2014, January 2, 2019, January 2, 2021, January 2, 2022, and January 2, 2023, each described as compensation from the issuer.

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

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Available on EDGAR 09/15/2026 - 04:38 PM Accepted by SEC EDGAR 09/15/2026 - 04:38 PM Learn about SEC filing dates

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	0001648839
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	HORNBECK OFFSHORE SERVICES, INC.
SEC File Number	001-32936
Address of Issuer	103 NORTHPARK BOULEVARD SUITE 300 COVINGTON LOUISIANA 70433
Phone	985-727-2000
Name of Person for Whose Account the Securities are To Be Sold	Staffeldt Erik
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	Former 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	253723	2237671.86	147382447	09/15/2026	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	01/03/2014	Restricted Stock Vesting	Issuer			1109	01/03/2014	Compensation
Common	01/03/2015	Restricted Stock Vesting	Issuer			1109	01/03/2015	Compensation
Common	01/02/2019	Restricted Stock Vesting	Issuer			9175	01/02/2019	Compensation
Common	01/03/2019	Restricted Stock Vesting	Issuer			3137	01/03/2019	Compensation
Common	01/04/2019	Restricted Stock Vesting	Issuer			4758	01/04/2019	Compensation
Common	01/02/2021	Restricted Stock Vesting	Issuer			100072	01/02/2021	Compensation
Common	01/02/2022	Restricted Stock Vesting	Issuer			124066	01/02/2022	Compensation
Common	01/02/2023	Restricted Stock Vesting	Issuer			10297	01/02/2023	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
Erik S. Staffeldt 103 Northpark Boulevard Suite 300 Covington LA 70433	Common	09/02/2026	117619	1222070.09
Erik S. Staffeldt 103 Northpark Boulevard Suite 300 Covington LA 70433	Common	09/03/2026	130635	1275873.45
Erik S. Staffeldt 103 Northpark Boulevard Suite 300 Covington LA 70433	Common	09/08/2026	50911	464512.11
Erik S. Staffeldt 103 Northpark Boulevard Suite 300 Covington LA 70433	Common	09/09/2026	107081	976149.08

144: Remarks and Signature

Remarks
Date of Notice	09/15/2026
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/ Joshua Schmitt, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Erik S. Staffeldt.
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)