# EDGAR Filing Document

**Accession Number:** 0000866829
**File Stem:** 0001140361-26-024120
**Filing Date:** 2026-6
**Character Count:** 32534
**Document Hash:** 5833332df8d002f0cf7cb037141b0efa
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001140361-26-024120.hdr.sgml**: 20260605

**ACCESSION NUMBER**: 0001140361-26-024120

**CONFORMED SUBMISSION TYPE**: 425

**PUBLIC DOCUMENT COUNT**: 22

**FILED AS OF DATE**: 20260605

**DATE AS OF CHANGE**: 20260605

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** HELIX ENERGY SOLUTIONS GROUP INC
- **CENTRAL INDEX KEY:** 0000866829
- **STANDARD INDUSTRIAL CLASSIFICATION:** OIL, GAS FIELD SERVICES, NBC [1389]
- **ORGANIZATION NAME:** 01 Energy & Transportation
- **EIN:** 953409686
- **STATE OF INCORPORATION:** MN
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 425
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-32936
- **FILM NUMBER:** 261067035

**BUSINESS ADDRESS:**
- **STREET 1:** 3505 W SAM HOUSTON NORTH
- **STREET 2:** SUITE 400
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77043
- **BUSINESS PHONE:** 281-618-0400

**MAIL ADDRESS:**
- **STREET 1:** 3505 W SAM HOUSTON NORTH
- **STREET 2:** SUITE 400
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77043

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** CAL DIVE INTERNATIONAL INC
- **DATE OF NAME CHANGE:** 19960821
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** HELIX ENERGY SOLUTIONS GROUP INC
- **CENTRAL INDEX KEY:** 0000866829
- **STANDARD INDUSTRIAL CLASSIFICATION:** OIL, GAS FIELD SERVICES, NBC [1389]
- **ORGANIZATION NAME:** 01 Energy & Transportation
- **EIN:** 953409686
- **STATE OF INCORPORATION:** MN
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 425

**BUSINESS ADDRESS:**
- **STREET 1:** 3505 W SAM HOUSTON NORTH
- **STREET 2:** SUITE 400
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77043
- **BUSINESS PHONE:** 281-618-0400

**MAIL ADDRESS:**
- **STREET 1:** 3505 W SAM HOUSTON NORTH
- **STREET 2:** SUITE 400
- **CITY:** HOUSTON
- **STATE:** TX
- **ZIP:** 77043

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** CAL DIVE INTERNATIONAL INC
- **DATE OF NAME CHANGE:** 19960821

------

#### Filed by Helix Energy Solutions Group, Inc. pursuant to

#### Rule 425 under the Securities Act of 1933,

#### and deemed filed pursuant to Rule 14a-12

#### under the Securities Exchange Act of 1934

#### Subject Company: Helix Energy Solutions Group, Inc.

#### Commission File No.: 001-32936

#### <br>

**![](ef20075627_425slide1.jpg)

Creating a Premier Integrated Offshore Services Company June 2026

------

![](ef20075627_425slide2.jpg)

Disclaimer Forward-Looking Statements This presentation contains forward-looking statements. All statements, other than statements of present or historical fact included in this presentation, regarding Helix Energy Solutions Group, Inc.'s ("Helix") proposed merger with Hornbeck Offshore Services, Inc. ("Hornbeck"), Helix's ability to consummate the transaction, the benefits of the transaction and the combined company's future financial performance, as well as the combined company's strategy, future operations, estimated financial position, estimated revenues and losses, estimated synergies, projected costs, prospects, plans and objectives of management are forward-looking statements. These statements are based on current expectations and assumptions and are subject to risks and uncertainties that could cause actual results to differ materially. Words such as "anticipate," "believe," "expect," "intend," "may," "plan," "project," "should," "will" and similar expressions are intended to identify forward-looking statements, though not all forward-looking statements contain these identifying words, and the absence of these words does not mean that a statement is not forward-looking. Such forward-looking statements include, but are not limited to, statements regarding: Helix's and Hornbeck's expectations, hopes, beliefs, intentions or strategies regarding the completion of the proposed transaction on the anticipated terms and timing, or at all, including obtaining regulatory and shareholder approvals, and the satisfaction of other conditions to the completion of the proposed transaction; timeline and ability to realize anticipated benefits of the proposed transaction (including expected synergies and balance sheet balances); and governance of the combined company. These forward-looking statements are based largely on Helix's and Hornbeck's current expectations. These forward-looking statements involve known and unknown risks, uncertainties and other important factors that may cause Helix's or Hornbeck's actual results, performance or achievements to be materially different from any future results, performance or achievements expressed or implied by the forward-looking statements, including, but not limited to, risks related to potential litigation relating to the proposed transaction, including the effects of any outcomes related thereto; the risk that disruptions from the proposed transaction (including the ability of certain customers to terminate or amend contracts upon a change of control) will harm Helix's or Hornbeck's business, including current plans and operations, including during the pendency of the proposed transaction; the ability of Helix or Hornbeck to retain and hire key personnel, to retain customers or maintain relationships with their respective suppliers and customers; the diversion of management's time and attention from ordinary course business operations to completion of the proposed transaction; potential adverse reactions or changes to business relationships resulting from the announcement or completion of the proposed transaction; legislative, regulatory and economic developments; potential business uncertainty, including changes to existing business relationships, during the pendency of the proposed transaction that could affect Helix's or Hornbeck's financial performance as well as unforeseen liabilities, future capital expenditures, revenues, expenses, earnings, synergies, economic performance, indebtedness, financial condition, losses, future prospects, business and management strategies, expansion and growth of Helix's or Hornbeck's businesses; the inability of Helix and Hornbeck to achieve expected synergies from the transaction or that it may take longer or be more costly than expected to achieve those synergies; an inability to de-leverage on the expected timeline, or at all; the imposition of any terms and conditions on any required governmental and regulatory approvals that could reduce the anticipated benefits to Helix and Hornbeck of the acquisition; the inability to successfully integrate Hornbeck's operations with those of Helix without unexpected cost or delay; certain restrictions during the pendency of the proposed transaction that may impact Helix's or Hornbeck's ability to pursue certain business opportunities or strategic transactions; the possibility that the proposed transaction may be more expensive to complete than anticipated, including as a result of unexpected factors or events; the occurrence of any event, change or other circumstance that could give rise to the termination of the proposed transaction, including in circumstances requiring Helix or Hornbeck to pay a termination fee and expense reimbursement; the risk that Helix's or Hornbeck's share price may decline significantly if the proposed transaction is not consummated; there may be liabilities that are not known, probable or estimable at this time or unexpected costs, charges or expenses; actions by governments, regulatory authorities, customers, suppliers and partners; market conditions; results from acquired properties; demand for services; the performance of contracts by suppliers, customers and partners; operating hazards and delays, which includes delays in delivery, chartering or customer acceptance of assets or terms of their acceptance; ultimate ability to realize current backlog; employee management issues; complexities of global political and economic developments; geologic risks; volatility of oil and gas prices and other risks described from time to time in Helix's filings with the Securities and Exchange Commission ("SEC"). In addition, Helix and Hornbeck caution you that the forward-looking statements contained in this presentation are subject to the following factors: (i) the occurrence of any event, change or other circumstances that could delay the proposed transaction or give rise to the termination of the agreements related thereto; (ii) the outcome of any legal proceedings that may be instituted against Helix or Hornbeck following announcement of the proposed transaction; (iii) the inability to complete the proposed transaction due to the failure to obtain approval of the shareholders of Helix or Hornbeck, or other conditions to closing in the merger agreement; (iv) the risk that the proposed transaction disrupts Helix's or Hornbeck current plans and operations as a result of the announcement of the proposed transaction; (v) Helix's and Hornbeck's ability to realize the anticipated benefits of the proposed transaction, which may be affected by, among other things, competition and the ability of Helix and Hornbeck to grow and manage growth profitably following the proposed transaction; and (vi) costs related to the proposed transaction. The forward-looking statements in this presentation are based upon information available to Helix and Hornbeck as of the date of this presentation and, while Helix and Hornbeck believe such information forms a reasonable basis for such statements, these statements are inherently uncertain, and you are cautioned not to unduly rely upon these statements. Except as required by applicable law, Helix and Hornbeck do not plan to publicly update or revise any forward-looking statements contained in this presentation, whether as a result of any new information, future events or otherwise. Additional information concerning these and other factors that may impact the operations and projections discussed herein can be found in Helix's periodic filings with the SEC, including Helix's Annual Report on Form 10-K for the fiscal year ended December 31, 2025, Helix's subsequent Quarterly Reports on Form 10-Q and in the Form S-4. Helix's SEC filings are available publicly on the SEC's website at www.sec.gov. Participants in the Solicitation Helix and certain of its directors and executive officers and Hornbeck and certain of its directors and executive officers, may be deemed to be participants in the solicitation of proxies from the shareholders of Helix (the "Helix Shareholders") with respect to the proposed transaction under the rules of the SEC. Information regarding the names, affiliations and interests of certain of Helix's directors and executive officers in the solicitation by reading Helix's Annual Report on Form 10-K for the fiscal year ended December 31, 2025 filed with the SEC on February 26, 2026, Helix's subsequent Quarterly Reports on form 10-Q filed with the SEC, Helix's definitive proxy statement for the 2026 annual meeting of shareholders filed with the SEC on April 1, 2026, the proxy statement/prospectus (as defined below) and other relevant materials filed with the SEC in connection with the proposed transaction when they become available. Free copies of these documents may be obtained as described in the paragraphs above. Information regarding the persons who may, under the rules of the SEC, be deemed participants in the solicitation of the Helix Shareholders in connection with the proposed transaction, including a description of their direct and indirect interests, by security holdings or otherwise, is included in the proxy statement/prospectus and will also be set forth in other relevant materials when filed with the SEC. Important Information About the Proposed Transaction and Where to Find It In connection with the proposed transaction, Helix has filed with the SEC a registration statement on Form S-4 to register the common stock of Helix to be issued in connection with the proposed transaction. The registration statement includes a document that serves as a proxy statement and prospectus of Helix (the "proxy statement/prospectus"), and Helix will file other documents regarding the proposed transaction with the SEC. This document is not a substitute for the registration statement, the proxy statement/prospectus, or any other document that Helix has filed or may file with the SEC. BEFORE MAKING ANY VOTING DECISION, INVESTORS AND SECURITY HOLDERS ARE URGED TO READ THE REGISTRATION STATEMENT, THE PROXY STATEMENT/PROSPECTUS, AND ANY OTHER RELEVANT DOCUMENTS THAT HAVE BEEN OR MAY BE FILED WITH THE SEC, AS WELL AS ANY AMENDMENTS OR SUPPLEMENTS TO THOSE DOCUMENTS, CAREFULLY AND IN THEIR ENTIRETY IF AND WHEN THEY BECOME AVAILABLE BECAUSE THEY DO AND WILL CONTAIN IMPORTANT INFORMATION ABOUT HELIX AND HORNBECK, THE PROPOSED TRANSACTION, THE RISKS RELATED THERETO, AND RELATED MATTERS. After the registration statement has been declared effective, a definitive proxy statement will be mailed to the Helix Shareholders. Investors and security holders will be able to obtain free copies of the registration statement and the proxy statement/prospectus, as each may be amended or supplemented from time to time, and other relevant documents filed by Helix with the SEC (if and when they become available) through the website maintained by the SEC at www.sec.gov. Copies of documents filed with the SEC by Helix, including the proxy statement/prospectus, will be available free of charge from Helix's website at helixesg.com under the "Investors" tab. No Offer or Solicitation This presentation is not intended to and does not constitute an offer to buy or sell or the solicitation of an offer to buy or sell any securities, or a solicitation of any vote or approval, nor shall there be any sale of securities in any jurisdiction in which such offer, solicitation, or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction. No offer of securities shall be made except by means of a prospectus meeting the requirements of Section 10 of the Securities Act of 1933, as amended Non-GAAP Financial Measures This presentation contains certain financial measures not presented in accordance with U.S. generally accepted accounting principles ("GAAP"), including, but not limited to, Adjusted EBITDA and Adjusted EBITDA Margin. These non-GAAP financial measures are not measures of financial performance in accordance with GAAP and may exclude items that are significant in understanding and assessing the financial results of Helix, Hornbeck or the pro forma combined company if the proposed transaction is consummated. Therefore, these measures should not be considered in isolation or as an alternative to net income, cash flows from operations or other measures of profitability, liquidity or performance under GAAP. You should be aware that the presentation of these measures may not be comparable to similarly-titled measures used by other companies. A reconciliation of these non-GAAP financial measures to the most directly comparable GAAP measure is included in the Appendix to this presentation. Helix and Hornbeck's management teams believe the non-GAAP financial measures contained in this presentation provide useful information to the management teams and investors regarding certain financial and business trends relating to Helix and Hornbeck's respective financial conditions and results of operations. However, these non-GAAP financial measures are subject to inherent uncertainty and reflect the exercise of judgments by Helix and Hornbeck's management teams about which items of expense and income are excluded or included in determining these non-GAAP financial measures. Please refer to the Appendix to this presentation for additional information about the items of expense and income that are included in determining the non-GAAP financial measures contained in this presentation and for a reconciliation of non-GAAP financial measures contained in this presentation to the most directly comparable GAAP measure. For purposes of this presentation, Helix's presentation of non-GAAP metrics has been aligned to Hornbeck's historical calculation and presentation of such non-GAAP metrics and may therefore differ from Helix's presentation of non-GAAP metrics elsewhere.

------

![](ef20075627_425slide3.jpg)

Combination Rationale Combines Two Market Leaders Into an Integrated Deepwater Offshore Services Platform Complementary Businesses Expanded Service Offerings and Customer Diversification Growth Platform with Scale Significant Revenue and Cost Synergies Aligned Cultures and Proven Leadership Team + Well Intervention, Subsea Robotics and Technical Services High-Specification Fleet of Specialty Vessels The Combined Company will be renamed Hornbeck Offshore Services and trade on the NYSE under the Ticker Symbol "HOS"

------

![](ef20075627_425slide4.jpg)

Transaction Summary Transaction Structure All-stock transaction Pre-merger Helix shareholders will own 45% and pre-merger Hornbeck securityholders will own 55% of the combined company1 Leadership and Governance Todd Hornbeck will serve as CEO William Transier will serve as Chairman 7-member board with 3 Directors from Helix and 4 Directors from Hornbeck Headquarters and Listing Company will be headquartered in Houston, TX and Covington, LA Combined Company to be named Hornbeck Offshore Services and will trade on the NYSE under the ticker symbol "HOS"; Helix brand to be retained for Well Intervention Services Timing Transaction approved by directors of both boards Hornbeck principal stockholders (including funds affiliated with Ares) have approved the transaction Helix shareholder approval required Transaction expected to close in the second half of 2026, subject to regulatory, Helix shareholder and other customary approvals 15 Multi-Purpose Support Vessels (MPSVs)(2) 58 Offshore Supply Vessels (OSVs) 7 Well Intervention Vessels 48 Robotics and Trenching Assets $2.0bn Total Backlog YE 2025 85+(2) Total Vessels > $500mm Cash at Closing 0.1x Leverage Current Net Debt(3) / LTM Adjusted EBITDA(4) Select Combination Highlights 1 Pro Forma ownership is based on a fully diluted basis. \| 2 Includes two new build Multi-Purpose Support Vessels. \| 3 As of 3/31/2026, pro forma for sale of Alliance prior to transaction related costs. \| 4 Reflects the sum of Hornbeck Q1 LTM Adjusted EBITDA plus Helix Q1 LTM Adjusted EBITDA as of 31-March-2026. Adjusted EBITDA is a non-GAAP financial measure. See Appendix for reconciliations.

------

![](ef20075627_425slide5.jpg)

Post-Merger Executive Leadership Todd M. Hornbeck President, Chief Executive Officer & Director Scotty Sparks EVP & Chief Operating Officer, Subsea Services and Well Intervention Ben Todd EVP & Chief Operating Officer, Marine Transportation and Specialty Daniel Stuart EVP & Chief Commercial Officer Brian Cook EVP & Chief Accounting Officer Sam Giberga EVP, General Counsel and Secretary Priscilla Heistad EVP & Chief Human Resources Officer Potter Adams EVP & Chief Financial Officer

------

![](ef20075627_425slide6.jpg)

Global Presence in Key Offshore Markets Transaction Merges Two Industry Leaders with Complementary Businesses and Geographic Presence providing Diversified Services to the Full Deepwater Life Cycle Revenue by Region(1) Source of world map – slide is an image copy to crop top of map 1 Represents 2025 Revenue. Hornbeck Helix

------

![](ef20075627_425slide7.jpg)

&nbsp;&nbsp;&nbsp;&nbsp;Drilling Support Oilfield Specialty Military & Other Non-Oilfield Decommissioning Subsea IRM Integration of complementary service offerings increases customer relevance and creates unique cross-selling opportunities that drive growth and improve margins Combined fleet of vessels and specialty equipment enables comprehensive suite of combined services as a "one-stop shop" for customers while enhancing profitability through asset optimization and scale Oil and Gas Non – Oil and Gas Operational logistics for submarine fleet Submarine rescue, training & support Long range acoustic survey support Autonomous vessels Defense Offshore wind farm survey & installation support Windfarm operation and maintenance support Submarine cable survey Bubble curtains / Boulder and Unexploded Ordinance (UXO) removal Renewable Energy Rocket component landing and recovery platform Vessel support for testing and retrieval Aerospace Hurricane relief Aircraft disasters Vessel salvage operations Environmental response Humanitarian Assistance and Disaster Relief (HADR) Drilling Support Oilfield Specialty Well Intervention & Decommissioning Subsea Services / Inspection Repair and Maintenance (IRM) 2025 Combined Revenue Mix Complementary Businesses Providing Diversified Service Offerings

------

![](ef20075627_425slide8.jpg)

World Class Deepwater Fleet Combined Company Forms an Expanded and Enhanced High-Specification Fleet with a Focus on Well Intervention, Subsea & Specialty Services, Robotics, Marine Transportation, and Emerging Technologies to Support the Energy, Defense and Renewable Markets 7 Total Well Intervention Vessels 2 monohull riserless vessels 3 semi-submersible riser-based vessels 2 monohull riser-based vessels(1) 12 Subsea systems Well Intervention Vessels 15 Total MPSVs 5 Subsea MPSVs 5 Specialty MPSVs 3 Flotels 2 Newbuild MPSVs arriving in 2027 Multipurpose Support Vessels 6 Subsea trenching systems 39 work class remotely operated vehicles (ROVs) 6 trenching and subsea light construction vessels(1) Robotics and Trenching 58 Total OSVs 22 Ultra High-Spec OSVs 18 High-Spec OSVs 18 Mid-Spec OSVs(2) Offshore Support Vessels 1 Chartered vessels \| 2 Includes two low-spec vessels.

------

![](ef20075627_425slide9.jpg)

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;MPSV & OSV Vessels Subsea Systems ROVs Well Intervention Vessels Customers procured one or more discrete services Multiple vendors and fragmented margin pool Less efficient asset deployment Integrated, end-to-end service offering Single counterparty for multiple services Streamlined execution through comprehensive project management Optimized asset deployment Differentiated Integrated Services Offering After Merger Before Merger Customers Procure MPSV & OSV Vessels ROVs Subsea Systems Engineering Serving multiple growing end markets: Oil & Gas Renewables Defense Well Intervention Vessels Engineering Integrated Services /

------

![](ef20075627_425slide10.jpg)

Note: $ in millions. Excludes impact of MPSV newbuilds, stacked fleet and any potential additional ROV purchases. \| 1 Assumes increases in EBITDA margin across the fleet. \| 2 Assumes 85% contribution margin for incremental utilization. \| 3 Adjusted EBITDA is a non-GAAP financial measure. See Appendix for reconciliations. ~ ~ ~ Increase in Margin1 Incremental Utilization2 Incremental Utilization: Increase in Margin: High Synergy Potential from Incremental Utilization and Margin Expansion Incremental Adj. EBITDA3 Asset 2025A Utilization HOS MPSVs 65 % HOS OSVs 75 % HLX Well InterventionVessels 75 % HLX ROVs 60 % HLX Robotics Vessels 55 % ~

------

![](ef20075627_425slide11.jpg)

Global Presence with Strong Exposure to Key Deepwater and Specialty Offshore Markets Complementary Innovative Marine Solutions Growth Platform with Scale Value Creation via Organic Growth, Operational Efficiencies and Strategic M&A Aligned Cultures with Proven Leadership The Premier Integrated Offshore Services Company

------

![](ef20075627_425slide12.jpg)

Appendix

------

![](ef20075627_425slide13.jpg)

Supplemental Updates 1 Adjusted EBITDA is a non-GAAP financial measure. See Appendix for reconciliations. Transaction Synergies At least ~$75 million of annual synergies within three years of closing consisting of: At least ~$45 million of annual revenue synergies driven by increased asset utilization and margin expansion At least ~$30 million of cost synergies Alliance Divestiture As previously communicated on May 4, 2026, Helix announced the sale of all of the equity interests of its Gulf of America-focused Shallow Water Abandonment business to C-Dive, LLC, a member of the Chouest group of companies, for expected total proceeds of ~$135mm in cash, comprised of $107.5mm at closing plus estimated future working capital adjustments Alliance generated ~$200mm of Revenue and ~$35mm of Adj. EBITDA1 in 2025A and ~$204mm of Revenue and ~$38mm of Adj. EBITDA1 for the last twelve months ended Q1 2026 Excluding Alliance, Helix generated ~$1,092mm of Revenue and ~$252mm of Adj. EBITDA1 in 2025A and ~$1,097mm of Revenue and ~$232mm of Adj. EBITDA1 for the last twelve months ended Q1 2026 Hornbeck Q1 2026 Financial Results Hornbeck Q1 actual results are included in the following slides In Q1 2026, Hornbeck generated Revenue and Adj. EBITDA1 of $173mm and $65mm, respectively, representing an increase of ~24% and ~126% YOY vs. Q1 2025 On an LTM basis as of 3/31/2026, Hornbeck generated $753mm of Revenue and $324mm of Adj. EBITDA1

------

![](ef20075627_425slide14.jpg)

Transaction Process Update Note: Illustrative timeline assumes no second request or "pull and refile" for US HSR filing and simple case under foreign regulatory approvals. Item / Event Date Signing of Merger Agreement April 22 Sale of Alliance May 1 Helix Annual Meeting of Shareholders May 13 File HSR Notification May 20 File ex-US regulatory filings in UK, Brazil and Poland May 20 File Form S-4 and Proxy Statement / Prospectus June 4 S-4 Declared Effective, 424b Filed and Proxy Statement Mailing Commenced ~ 2nd half 2026 Ex-US Regulatory Approval ~ 2nd half 2026 Helix Shareholder Vote ~ 2nd half 2026 Closing ~ 2nd half 2026 Completed Key Events to Closing

------

![](ef20075627_425slide15.jpg)

Combined Historical Financials ($ in millions) Source: Helix and Hornbeck Financial Disclosures 1 Adjusted EBITDA is a non-GAAP financial measure. See Appendix for reconciliations. \| 2 Total proceeds of ~$135mm in cash, comprised of $107.5mm at closing plus $27.9mm of estimated net working capital adjustments. Q1 2026 Balance Sheet \| Pro Forma for Alliance Sale Revenue \| (Excludes Alliance) Adj. EBITDA1 \| (Excludes Alliance) Funded Debt $778 Cash (570) Alliance Proceeds2 (135) Net Debt $73 Hornbeck Helix

------

![](ef20075627_425slide16.jpg)

Scale and Growth Platform Active Organic Growth \| (Excludes Alliance) Key Growth Expectations Increased scale, lower cost of capital and higher cash generation Strong balance sheet and low leverage Lower earnings volatility and greater resilience through-cycle Positioned for organic and inorganic growth Commissioning Service Operation Vehicle (C/SOV) came online in 4Q 2025 Two 400-Class MPSV newbuilds expected to come online in 2027 Potential reactivation of stacked Mid-, High- and Ultra High-Spec OSVs Potential future increases in effective dayrates for active fleet of OSVs and MPSVs, respectively Potential well intervention vessel dayrate expansion with improving offshore workover market Well-Positioned for Future Growth and Sustained Shareholder Value Supported by Increased Scale, Balance Sheet Strength and Robust Free Cash Flow Generation (1) Hornbeck Helix ($ in millions) 1 Reflects the sum of Hornbeck Q1 LTM Adjusted EBITDA plus Helix Q1 LTM Adjusted EBITDA as of 31-March-2026. Adjusted EBITDA is a non-GAAP financial measure. See Appendix for reconciliations.

------

![](ef20075627_425slide17.jpg)

Pre-Transaction Hornbeck 57 U.S. Jones Act-Qualified vessels Represents 78% of Hornbeck's pro forma fleet of 73 vessels +2 = 73 New MPSVs expected to be delivered in 2027 ~$324mm LTM Adjusted EBITDA(2) 43% LTM Adjusted EBITDA Margin(2) Company Overview Hornbeck by the Numbers Tailored subsea and logistics solutions that address a broad spectrum of unique customer "life-of-field" requirements Leading Deepwater High - and Ultra High-Spec footprint across the U.S. GoA, Mexico, the Caribbean, Northern South America and Brazil High barriers to entry with key legislative flag protections, such as the U.S. Jones Act Diversified revenue base at market-leading dayrates with large, blue-chip customers Proven, consistent operational performance with an unwavering commitment to safety One of the preeminent, market-leading providers of deepwater Ultra High-Spec marine transportation services to a broad range of offshore energy, infrastructure and defense customers 71 Vessels in Current Fleet 58 Multi-class Offshore Support Vessels ("OSVs" or "PSVs") 13 Multi-Purpose Support Vessels ("MPSVs")(1) 20+ Year Average expected remaining economic useful life of currently active fleet(4) $5.8B Total Fleet Replacement Value(3) $2.7B Appraised Fair Value(3) 1 Includes the MPSV HOS Rocinante that was recently placed in service in November 2025; does not include four non-owned managed OSVs. \| 2 Adjusted EBITDA Margin represents Adjusted EBITDA divided by total revenue. Adjusted EBITDA is a non-GAAP financial measure. See Appendix for reconciliation. \| 3 Reflects the fair market value and replacement value provided by VesselsValueTM for pro forma fleet of 58 OSVs and 15 MPSVs as of April 2026. \| 4 Based on a 35-year economic useful life.

------

![](ef20075627_425slide18.jpg)

Operations Overview Key Attributes of Hornbeck Defense Operations Long-standing tenor (20 years since original military vessel tender) Trusted relationships with key ranking members of military History of providing creative solutions Robust and flexible fleet capable of diverse operations Submarine Support Vessel Support Blocking Vessel Emerging Technologies:Autonomy / AI Submarine support training General logistical services/special missions Vessel support for sea-based, X-band radar system (SBX) Proof of concept design by HOS Transportation Auxiliary General Submarine Escort (T-AGSE) O&M contract Submarine security and resupply Surveillance Towed Array Sensor System – Expeditionary (SURTASS-E) sonar system support and transportation Autonomous Vessel Prototypes Stern-Landing Vessel: Transportation and landing of military mobile equipment for USMC 5.0 yrs / 2.4 yrs 7.0 yrs 10.0 yrs (each) 5.0 yrs (each) Avg. Contract Duration(1) Combined Company expected to hold strong advantages in the Defense Services business, a growing percentage of revenue Defense Fleet and Representative Functions High-level security clearances for personnel and facilities 1 Inception to date, inclusive of expected renewals. Pro Forma Company is a Market Leader in Maritime Services for the Defense Industry

------

![](ef20075627_425slide19.jpg)

Helix \| Non-GAAP Reconciliation Note: All amounts exclude Alliance. March 31, 2026 March 31, 2025 March 31, 2026 December 31, 2025

------

![](ef20075627_425slide20.jpg)

Hornbeck \| Non-GAAP Reconciliation ($ in thousands, unaudited) Three Months Ended Twelve Months Ended March 31, 2026&nbsp;&nbsp;&nbsp;&nbsp; March 31, 2025 March 31, 2026&nbsp;&nbsp;&nbsp;&nbsp; December 31, 2025 Reconciliation from Net Income to EBITDA and Adjusted EBITDA:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Net income $19,103 $106 $192,387 $173,390 Interest, net&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Interest expense 9,259 8,002 33,816 32,559 Interest income 634&nbsp;&nbsp;&nbsp;&nbsp; 1,283&nbsp;&nbsp;&nbsp;&nbsp; 5,869&nbsp;&nbsp;&nbsp;&nbsp; 6,518 Total interest, net 8,625&nbsp;&nbsp;&nbsp;&nbsp; 6,719 27,947 26,041 Income tax expense 6,831 &nbsp;&nbsp;&nbsp;&nbsp; (244)&nbsp;&nbsp;&nbsp;&nbsp; (3,907)&nbsp;&nbsp;&nbsp;&nbsp; (10,982) Depreciation 12,025 10,007 43,572 41,554 Amortization 12,775&nbsp;&nbsp;&nbsp;&nbsp; 9,827&nbsp;&nbsp;&nbsp;&nbsp; 46,763&nbsp;&nbsp;&nbsp;&nbsp; 43,815 EBITDA $59,359 &nbsp;&nbsp;&nbsp;&nbsp; $26,415 $306,762 $273,818 Loss on early extinguishment of debt -&nbsp;&nbsp;&nbsp;&nbsp; -&nbsp;&nbsp;&nbsp;&nbsp; 67&nbsp;&nbsp;&nbsp;&nbsp; 67 Stock-based compensation expense 1,160 1,114 7,769 7,723 Interest income 634 &nbsp;&nbsp;&nbsp;&nbsp; 1,283 &nbsp;&nbsp;&nbsp;&nbsp; 5,869 &nbsp;&nbsp;&nbsp;&nbsp; 6,518 Merger and integration costs 3,931 - 3,931 - Research and development expense 13 &nbsp;&nbsp;&nbsp;&nbsp; -&nbsp;&nbsp;&nbsp;&nbsp; 13 &nbsp;&nbsp;&nbsp;&nbsp; - Adjusted EBITDA $65,097 &nbsp;&nbsp;&nbsp;&nbsp; $28,812 $324,411 $288,126

------

![](ef20075627_425slide21.jpg)

Alliance Financials March 31, 2026 December 31, 2025 March 31, 2026 March 31, 2025

------**