ARES MANAGEMENT LLC - 01 Sep 2026 Form 3 Insider Report for HORNBECK OFFSHORE SERVICES, INC. (HOS)

Reporting relationship: 10%+ Owner
Issuer ticker: HOS
Reported as of: 01 Sep 2026
Net transaction value: $0
SEC form: 3
Accepted by SEC: 09 Sep 2026, 17:30:21 UTC
Prior SEC filing: 17 Aug 2026
Source filing: View source filing
Reporting owner signature: Ares Management LLC, By: /s/ Anton Feingold, Authorized Signatory

Key filing fact

ARES MANAGEMENT LLC filed Form 3 for HORNBECK OFFSHORE SERVICES, INC. (HOS) on 09 Sep 2026.

Key facts

This page summarizes ARES MANAGEMENT LLC's Form 3 filing for HORNBECK OFFSHORE SERVICES, INC. (HOS).
0 reported transactions and 14 derivative rows are listed below.
Accepted by SEC: 09 Sep 2026, 17:30.

Change

Previous filing in this sequence was filed on 17 Aug 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Official SEC source

Ownership activity is grounded in SEC Form 3 disclosures.

View source filing

Reporting Owners (7)

CIK 0001259313 Primary reporting owner

ARES MANAGEMENT LLC

Relationship: 10%+ Owner
Address: 1800 AVENUE OF THE STARS, SUITE 1400, LOS ANGELES
Signature: Ares Management LLC, By: /s/ Anton Feingold, Authorized Signatory
Signature date: 09 Sep 2026

CIK 0001620263

Ares Partners Holdco LLC

Relationship: 10%+ Owner
Address: C/O ARES MANAGEMENT LLC, 1800 AVENUE OF THE STARS, SUITE 1400, LOS ANGELES
Signature: Ares Partners Holdco LLC, By: /s/ Anton Feingold, Authorized Signatory
Signature date: 09 Sep 2026

CIK 0001761656

Ares Voting LLC

Relationship: 10%+ Owner
Address: C/O ARES MANAGEMENT LLC, 1800 AVENUE OF THE STARS, SUITE 1400, LOS ANGELES
Signature: Ares Voting LLC, By: Ares Partners Holdco LLC, its sole member, By: /s/ Anton Feingold, Authorized Signatory
Signature date: 09 Sep 2026

CIK 0001620264

Ares Management GP LLC

Relationship: 10%+ Owner
Address: C/O ARES MANAGEMENT LLC, 1800 AVENUE OF THE STARS, SUITE 1400, LOS ANGELES
Signature: Ares Management GP LLC, By: /s/ Anton Feingold, Authorized Signatory
Signature date: 09 Sep 2026

CIK 0001176948

Ares Management Corp

Relationship: 10%+ Owner
Address: C/O ARES MANAGEMENT LLC, 1800 AVENUE OF THE STARS, SUITE 1400, LOS ANGELES
Signature: Ares Management Corporation, By: /s/ Anton Feingold, Authorized Signatory
Signature date: 09 Sep 2026

CIK 0001669983

Ares Holdco LLC

Relationship: 10%+ Owner
Address: C/O ARES MANAGEMENT LLC, 1800 AVENUE OF THE STARS, SUITE 1400, LOS ANGELES
Signature: Ares Holdco LLC, By: /s/ Anton Feingold, Authorized Signatory
Signature date: 09 Sep 2026

CIK 0001536937

Ares Management Holdings L.P.

Relationship: 10%+ Owner
Address: C/O ARES MANAGEMENT LLC, 1800 AVENUE OF THE STARS, SUITE 1400, LOS ANGELES
Signature: Ares Management Holdings L.P., By: Ares Holdco LLC, its general partner, By: /s/ Anton Feingold, Authorized Signatory
Signature date: 09 Sep 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

HOS holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 3,585,001
Date: 01 Sep 2026
Ownership: See Footnotes
Footnotes: F1, F2, F3

HOS holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 3,585,001
Date: 01 Sep 2026
Ownership: See Footnotes
Footnotes: F1, F2, F3

HOS holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 3,585,001
Date: 01 Sep 2026
Ownership: See Footnotes
Footnotes: F1, F2, F3

HOS holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 3,585,001
Date: 01 Sep 2026
Ownership: See Footnotes
Footnotes: F1, F2, F3

HOS holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 3,585,001
Date: 01 Sep 2026
Ownership: See Footnotes
Footnotes: F1, F2, F3

HOS holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 3,585,001
Date: 01 Sep 2026
Ownership: See Footnotes
Footnotes: F1, F2, F3

HOS holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 3,585,001
Date: 01 Sep 2026
Ownership: See Footnotes
Footnotes: F1, F2, F3

HOS holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 23,840,862
Date: 01 Sep 2026
Ownership: See Footnotes
Footnotes: F4, F5

HOS holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 23,840,862
Date: 01 Sep 2026
Ownership: See Footnotes
Footnotes: F4, F5

HOS holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 23,840,862
Date: 01 Sep 2026
Ownership: See Footnotes
Footnotes: F4, F5

HOS holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 23,840,862
Date: 01 Sep 2026
Ownership: See Footnotes
Footnotes: F4, F5

HOS holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 23,840,862
Date: 01 Sep 2026
Ownership: See Footnotes
Footnotes: F4, F5

HOS holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 23,840,862
Date: 01 Sep 2026
Ownership: See Footnotes
Footnotes: F4, F5

HOS holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 23,840,862
Date: 01 Sep 2026
Ownership: See Footnotes
Footnotes: F4, F5

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

HOS holding Derivative

Warrants

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date: 01 Sep 2026
Ownership: See Footnotes
Underlying class: Common Stock
Underlying amount: 5,031,943
Exercise price
Footnotes: F1, F2, F3, F6, F7

HOS holding Derivative

Warrants

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date: 01 Sep 2026
Ownership: See Footnotes
Underlying class: Common Stock
Underlying amount: 5,031,943
Exercise price
Footnotes: F1, F2, F3, F6, F7

HOS holding Derivative

Warrants

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date: 01 Sep 2026
Ownership: See Footnotes
Underlying class: Common Stock
Underlying amount: 5,031,943
Exercise price
Footnotes: F1, F2, F3, F6, F7

HOS holding Derivative

Warrants

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date: 01 Sep 2026
Ownership: See Footnotes
Underlying class: Common Stock
Underlying amount: 5,031,943
Exercise price
Footnotes: F1, F2, F3, F6, F7

HOS holding Derivative

Warrants

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date: 01 Sep 2026
Ownership: See Footnotes
Underlying class: Common Stock
Underlying amount: 5,031,943
Exercise price
Footnotes: F1, F2, F3, F6, F7

HOS holding Derivative

Warrants

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date: 01 Sep 2026
Ownership: See Footnotes
Underlying class: Common Stock
Underlying amount: 5,031,943
Exercise price
Footnotes: F1, F2, F3, F6, F7

HOS holding Derivative

Warrants

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date: 01 Sep 2026
Ownership: See Footnotes
Underlying class: Common Stock
Underlying amount: 5,031,943
Exercise price
Footnotes: F1, F2, F3, F6, F7

HOS holding Derivative

Warrants

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date: 01 Sep 2026
Ownership: See Footnotes
Underlying class: Common Stock
Underlying amount: 37,897,551
Exercise price
Footnotes: F4, F5, F6, F7

HOS holding Derivative

Warrants

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date: 01 Sep 2026
Ownership: See Footnotes
Underlying class: Common Stock
Underlying amount: 37,897,551
Exercise price
Footnotes: F4, F5, F6, F7

HOS holding Derivative

Warrants

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date: 01 Sep 2026
Ownership: See Footnotes
Underlying class: Common Stock
Underlying amount: 37,897,551
Exercise price
Footnotes: F4, F5, F6, F7

HOS holding Derivative

Warrants

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date: 01 Sep 2026
Ownership: See Footnotes
Underlying class: Common Stock
Underlying amount: 37,897,551
Exercise price
Footnotes: F4, F5, F6, F7

HOS holding Derivative

Warrants

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date: 01 Sep 2026
Ownership: See Footnotes
Underlying class: Common Stock
Underlying amount: 37,897,551
Exercise price
Footnotes: F4, F5, F6, F7

HOS holding Derivative

Warrants

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date: 01 Sep 2026
Ownership: See Footnotes
Underlying class: Common Stock
Underlying amount: 37,897,551
Exercise price
Footnotes: F4, F5, F6, F7

HOS holding Derivative

Warrants

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date: 01 Sep 2026
Ownership: See Footnotes
Underlying class: Common Stock
Underlying amount: 37,897,551
Exercise price
Footnotes: F4, F5, F6, F7

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 7 footnotes

Footnote F1

Includes: (i) 10,107 shares of Common Stock and 134,887 warrants held by ASOF II A (DE) Holdings I, L.P., (ii) 56,103 shares of Common Stock and 748,260 warrants held by ASOF II Holdings I, L.P., (iii) 1,020,227 shares of Common Stock and 1,095,124 warrants held by ASOF Holdings I, L.P. (together with ASOF II A (DE) Holdings I, L.P. and ASOF II Holdings I, L.P., the "Ares SOF Holders"), (iv) 2,264,402 shares of Common Stock and 79,841 warrants held by ASSF IV AIV B Holdings III, L.P., (v) 72,506 shares of Common Stock and 2,208,429 warrants held by ASSF IV AIV B, L.P. (together with ASSF IV AIV B Holdings III, L.P., the "Ares SSF Holders") and (vi) 161,656 shares of Common Stock and 765,402 warrants held by two accounts managed or subadvised by Ares Management LLC with respect to which the Ares Entities (as defined below) may be deemed to have shared voting or dispositive power with the owners of such accounts (the "Ares Managed Accounts" and, such shares, the "Ares Managed Shares").

Footnote F2

Ares Partners Holdco LLC ("Ares Partners") is the sole member of each of Ares Management GP LLC and Ares Voting LLC, which are respectively the holders of the Class B and Class C common stock of Ares Management Corporation ("Ares Management"), which common stock allows them, collectively, to generally have the majority of the votes on any matter submitted to the stockholders of Ares Management if certain conditions are met. Ares Management is the sole member of Ares Holdco LLC, which is the general partner of Ares Management Holdings L.P., which is the sole member of Ares Management LLC, which is (x) the general partner of ASSF Operating Manager IV, L.P., which is the manager of each of the Ares SSF Holders, (y) the sole member of ASOF Investment Management LLC, which is the manager of each of the Ares SOF Holders and (z) the investment manager or investment subadvisor of each of the Ares Managed Accounts.

Footnote F3

We refer to all of the foregoing entities collectively as the Ares Entities. Each of the Ares Entities may be deemed to share beneficial ownership of the securities reported herein, but each disclaims any such beneficial ownership of securities not held of record by it. Ares Partners is managed by a board of managers, which is composed of Michael J Arougheti, R. Kipp deVeer, David B. Kaplan, Antony P. Ressler and Bennett Rosenthal (collectively, the "Board Members"). Mr. Ressler generally has veto authority over Board Members' decisions. Each of these individuals disclaims beneficial ownership of the securities that may be deemed to be beneficially owned by Ares Partners. The Ares Entities disclaim beneficial ownership of the Ares Managed Shares for purposes of Section 16 and this report shall not be deemed an admission that any of the Ares Entities are the beneficial owner of the Ares Managed Shares for purposes of Section 16 or for any other purpose.

Footnote F4

Includes: (i) 4,749,024 shares of Common Stock held by ASOF HOS AIV 1, L.P., (ii) 1,871,251 shares of Common Stock and 16,507,261 warrants held by ASOF HOS AIV 2, L.P. (together with ASOF HOS AIV 1, L.P., the "Ares SOF HOS Holders"), (iii) 14,314,404 shares of Common Stock held by ASSF IV HOS AIV 1, L.P. and (iv) 2,906,183 shares of Common Stock and 21,390,290 warrants held by ASSF IV HOS AIV 2, L.P. (together with ASSF IV HOS AIV 1, L.P., the "Ares SSF HOS Holders").

Footnote F5

ASOF HOS GP, LLC is managed by a board of managers, which is composed of Evan Hoole, Matthew Jill and Naseem Sagati Aghili. Each of these individuals disclaims beneficial ownership of the securities that may be deemed to be beneficially owned by ASOF HOS GP, LLC. ASOF HOS GP, LLC is the general partner of each of the Ares SSF HOS Holders and the Ares SOF HOS Holders. Accordingly, ASOF HOS GP, LLC may be deemed to share beneficial ownership of the securities held of record by the Ares SSF HOS Holders and the Ares SOF HOS Holders, but disclaims such beneficial ownership.

Footnote F6

The warrants are immediately exercisable but are subject to certain citizenship rules and limitations on exercise, sale, transfer or other disposition. The warrants do not expire.

Footnote F7

The exercise price of the warrants is $0.00001.

SEC remarks

Due to the limitations of the electronic filing system, ASOF HOS AIV 1, L.P., ASOF HOS AIV 2, L.P., ASSF IV HOS AIV 1, L.P., ASSF IV HOS AIV 2, L.P., ASOF HOS GP, LLC, ASOF II A (DE) Holdings I, L.P., ASOF II Holdings I, L.P., ASOF Holdings I, L.P., ASOF Investment Management LLC, ASSF IV AIV B Holdings III, L.P., ASSF IV AIV B, L.P. and ASSF Operating Manager IV, L.P. are filing on a separate Form 3.

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