STOCK TITAN

Orion Group Holdings (NYSE: ORN) revises timing in Q2 2026 investor deck

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Form Type
8-K/A

Rhea-AI Filing Summary

Orion Group Holdings, Inc. filed Amendment No. 1 to a prior current report to update slide 17 of its second quarter 2026 investor presentation. The project pipeline timing categories on that slide were revised from “2H2026, 1H2027, Beyond” to “2H2026, FY2027, Beyond” to align with calendar-year periods. The updated presentation, dated July 2026, is furnished under Regulation FD as Exhibit 99.2 and is not deemed filed or incorporated into other securities law reports unless specifically referenced.

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Item 7.01 Regulation FD Disclosure Disclosure
Material non-public information disclosed under Regulation Fair Disclosure, often investor presentations or guidance.
Item 9.01 Financial Statements and Exhibits Exhibits
Financial statements, pro forma financial information, and exhibit attachments filed with this report.
Amendment date July 28, 2026 Date associated with Amendment No. 1 to the current report
Investor presentation posting date July 29, 2026 Date the second quarter 2026 investor presentation was posted to the company website
Pipeline timing labels (prior) 2H2026; 1H2027; Beyond Original timing categories on slide 17 of the project pipeline
Pipeline timing labels (revised) 2H2026; FY2027; Beyond Revised timing categories on slide 17 to align with calendar-year periods
Exhibit 99.2 Investor Presentation, dated July 2026 Furnished investor presentation attached to the amendment
Exhibit 104 Cover Page Interactive Data File Inline XBRL data file embedded with the report
Regulation FD Disclosure regulatory
"Item 7.01 Regulation FD Disclosure furnishes the investor presentation"
Regulation FD disclosure requires public companies to share important, market-moving information with everyone at the same time instead of tipping off analysts or large investors first. Think of it as making sure all players on a field hear the same announcement simultaneously; that fairness helps investors trust that stock prices reflect the same information and reduces the risk of sudden, unfair trading advantages or regulatory penalties for selective leaks.
Emerging growth company regulatory
"Checkbox relates to Emerging growth company status under Rule 12b-2"
An emerging growth company is a recently public or smaller public firm that qualifies for temporary, lighter regulatory and disclosure rules to reduce the cost and effort of being public. For investors, it means the company may provide less historical financial detail and face fewer reporting requirements than larger firms, so it can grow more quickly but also carries higher uncertainty—like buying a promising early-stage product with fewer user reviews.
Inline XBRL technical
"Cover Page Interactive Data File is embedded within the Inline XBRL document"
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Investor Presentation financial
"Investor Presentation, dated July 2026, is attached as Exhibit 99.2"
An investor presentation is a carefully prepared talk or visual display that explains a company's business, goals, and financial performance. It helps investors understand how the company operates and its future prospects, much like a report card or progress update. These presentations are important because they provide transparency and help investors decide whether to support or invest in the company.

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FAQ

What did Orion Group Holdings (ORN) change in its Q2 2026 investor presentation?

Orion Group Holdings updated slide 17 of its Q2 2026 investor presentation. Pipeline timing categories were revised from “2H2026, 1H2027, Beyond” to “2H2026, FY2027, Beyond” so the project pipeline aligns with calendar-year periods.

Why did Orion Group Holdings (ORN) file Amendment No. 1 in July 2026?

Amendment No. 1 was filed solely to update slide 17 of the previously furnished investor presentation. The company states that, except for this timing revision, no other material changes were made to the original current report.

How is the updated Orion Group Holdings (ORN) investor presentation being made available?

The second quarter 2026 investor presentation was posted to the company’s website on July 29, 2026 and is also furnished as Exhibit 99.2 under Item 7.01, Regulation FD Disclosure.

Is the Orion Group Holdings (ORN) investor presentation considered filed with the SEC?

No. The company states that the Item 7.01 information, including Exhibit 99.2, is being furnished and not deemed “filed”, and is not incorporated by reference into other securities law filings unless specifically referenced.

What exhibits are included with Orion Group Holdings’ (ORN) Amendment No. 1?

The amendment includes Exhibit 99.2, an investor presentation dated July 2026, and Exhibit 104, the Cover Page Interactive Data File embedded within the Inline XBRL document.
0001402829false00014028292026-07-282026-07-28

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K/A

Amendment No. 1

Pursuant to Section 13 or 15(d) of the

Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): July 28, 2026

ORION GROUP HOLDINGS, INC.

(Exact name of Registrant as specified in its charter)

Delaware

1-33891

26-0097459

(State or other jurisdiction of incorporation)

(Commission File Number)

(IRS Employer Identification Number)

2940 Riverby Road, Suite 400

Houston, Texas 77020

(Address of principal executive offices)

(713) 852-6500

(Registrant's telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

    Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

    Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

    Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

    Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)

Title of Each Class

  ​ ​ ​

Trading Symbol(s)

  ​ ​ ​

Name of Each Exchange
on Which Registered

Common stock, $0.01 par value per share

ORN

The New York Stock Exchange

Common stock, $0.01 par value per share

ORN

NYSE Texas

Indicate by check mark whether the registrant is an emerging growth company as defined in as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.

Explanatory Note

This Amendment No. 1 to the Current Report on Form 8-K filed on July 29, 2026 (the “Original Form 8-K”) is being filed solely to update slide 17 of the pipeline presentation. The timing categories on that slide have been revised from “2H2026,” “1H2027” and “Beyond” to “2H2026,” “FY2027” and “Beyond.” This revision is intended solely to align the presentation with calendar-year periods. Except as described herein, no other material changes have been made to the Original Form 8-K.

Item 7.01 Regulation FD Disclosure.

On July 29, 2026, the Company posted the second quarter 2026 investor presentation to its website. The presentation is attached as Exhibit 99.2 to this Current Report on Form 8-K and is incorporated herein by reference. All information included in the presentation is presented as of the dates indicated, and the Company does not assume any obligation to correct or update such information in the future. In addition, the Company disclaims any inferences regarding the materiality of such information that may arise as a result of it furnishing such information under Item 7.01 of this Current Report on Form 8-K.

The information contained in this Item 7.01, including Exhibit 99.2 attached hereto, is being furnished and shall not be deemed “filed” for any purpose, and shall not be deemed incorporated by reference in any filing under the Securities Act or the Exchange Act, except as expressly set forth by specific reference in such filing.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits

Exhibit No.

Description

99.2

Investor Presentation, dated July 2026.

104

Cover Page Interactive Data File (embedded within the Inline XBRL document).

EXHIBIT INDEX

Exhibit No.

Description

99.2

Investor Presentation, dated July 2026.

104

Cover Page Interactive Data File (embedded within the Inline XBRL document).

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Orion Group Holdings, Inc.

Dated: August 4, 2026

By:

/s/ Travis J. Boone

President and Chief Executive Officer

Exhibit 99.2

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MARINE | CONCRETE | ENGINEERING & CONSULTING Investor Presentation July 2026

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2 DISCLAIMER This presentation contains, and the officers and directors of the Company may from time to time make, statements that are considered forward looking statements within the meaning of the Securities Act of 1933 and the Securities Exchange Act of 1934. These forward-looking statements are subject to a number of risks and uncertainties, many of which are beyond our control, which may include statements about: our business strategy; our financial strategy; our industry outlook; and our expected margin growth; our pipeline of opportunity; the expected benefits, results, growth and integration of our acquisition of J.E. McAmis; and our plans, objectives, expectations, forecasts, outlook and intentions. All of these types of statements, other than statements of historical fact included in this presentation, are forward-looking statements. In some cases, forward-looking statements can be identified by terminology such as “may,” “will,” “could,” “should,” “expect,” “plan,” “project,” “intend,” “anticipate,” “believe,” “estimate,” “predict,” “potential,” “pursue,” “target,” “continue,” the negative of such terms or other comparable terminology. The forward-looking statements contained in this presentation are largely based on our expectations, which reflect estimates and assumptions made by our management. These estimates and assumptions reflect our best judgment based on currently known market conditions and other factors. Although we believe such estimates and assumptions to be reasonable, they are inherently uncertain and involve a number of risks and uncertainties that are beyond our control. In addition, management’s assumptions about future events may prove to be inaccurate. Management cautions all readers that the forward-looking statements contained in this presentation are not guarantees of future performance, and we cannot assure any reader that such statements will be realized or the forward-looking events and circumstances will occur. Actual results may differ materially from those anticipated or implied in the forward-looking statements due to factors listed in the “Risk Factors” section in our filings with the U.S. Securities and Exchange Commission and elsewhere in those filings. Additional factors or risks that we currently deem immaterial, that are not presently known to us or that arise in the future could also cause our actual results to differ materially from our expected results. Given these uncertainties, investors are cautioned that many of the assumptions upon which our forward-looking statements are based are likely to change after the date the forward-looking statements are made. The forward-looking statements speak only as of the date made, and we undertake no obligation to publicly update or revise any forward-looking statements for any reason, whether as a result of new information, future events or developments, changed circumstances, or otherwise, notwithstanding any changes in our assumptions, changes in business plans, actual experience or other changes. These cautionary statements qualify all forward-looking statements attributable to us or persons acting on our behalf. This presentation may contain the financial measures: adjusted net income, EBITDA, adjusted EBITDA, and adjusted EPS, which are not calculated in accordance with U.S. GAAP. If presented, a reconciliation of the non-GAAP financial measures to the most directly comparable GAAP financial measure will be provided in the Appendix to this presentation.

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AT A GLANCE Orion is a leading specialty construction company focused on mission-critical projects on, over, and under the water KEY STATISTICS $852M 2025 Revenue $45M 2025 Adj. EBITDA $722M June 2026 Backlog ~2,000 Employees Marine Comprehensive engineering, construction, jetty & breakwater construction, dredging and specialty services SERVICES Concrete Construction services for commercial, structural, high-rise residential and industrial SAFETY RECORD AND RECOGNITIONS $900M - $950M 2026 Revenue Guidance $50M - $54M 2026 Adj. EBITDA Guidance World-class safety record 2025 Lost Time Incident Rate (LTIR): 0.13 vs. industry average of 2.3 Recognitions • #2 in Marine Ports (ENR) - 2025 • #15 in Concrete (ENR) - 2025 • NASA Causeway: 2025 ENR Best Project in the Southeast • CEO Travis Boone named EY Entrepreneur Of The Year® 2025 Finalist

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4 ORION INVESTMENT APPEALS Mission critical specialty construction provider with sustainable competitive advantages 1 Poised to benefit from multiple powerful demand drivers and a robust, growing $27B pipeline 2 Clear, disciplined strategy built on strengthened foundation to drive increased value creation 3 Strong balance sheet that provides flexibility for strategic investment Experienced management team focused on strategy, execution and growth 4 5

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High Barriers to Entry • Jones Act prohibits foreign competition in the U.S. marine market • Marine specialty equipment is unique and requires significant upfront investment to enter the market • Orion owns 1000+ pieces of specialty equipment with a replacement value of $600M • Legacy of high customer satisfaction on complex concrete projects • Long-standing, deep customer relationships Why We Win MISSION-CRITICAL SPECIALTY CONSTRUCTION PROVIDER WITH COMPETITIVE ADVANTAGES • Over 100 years of marine and civil engineering experience • Over 40 years of concrete construction expertise for a variety of industries • World-class safety record • Excellent reputation for delivering on time, on budget, with quality • Creative problem solver leveraging engineering group to deliver custom solutions • High-caliber leadership team and skilled workforce driving disciplined execution and growth

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Opportunity Expansion • Ability to pursue larger, more complex projects • Expanded site civil earthwork capabilities • Deep relationships with strategic customers • J.E. McAmis add additional marine construction capabilities and West Coast presence Investor Value POSITIONED TO BENEFIT FROM DURABLE, LONG-TERM INFRASTRUCTURE INVESTMENT TRENDS Long-term demand. Proven capabilities. Sustainable growth. Industry Demand • Port and transportation infrastructure modernization • Defense readiness and national security • AI and cloud infrastructure investment • Supply chain resiliency and manufacturing reshoring • Coastal resilience & water infrastructure • Access to larger, more complex, high value projects • High barriers to entry support competitive positioning • Greater visibility through durable backlog • Opportunities for margin expansion • Sustainable shareholder value creation

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7 MASSIVE U.S. NAVY OPPORTUNITY IN THE PACIFIC • U.S. Navy is procuring Multiple Award Construction Contracts for many billions in infrastructure projects throughout the Pacific • Scope includes new facilities, repair/renovation and upgrades to existing facilities, including wharves/piers, dredging, aprons, and more • Orion (with our partners) was selected on several MACC1 contracts, allowing ORN to compete on future task orders, limiting competition landscape Orion anticipates U.S. Navy funding for Pacific Deterrence and shipyard renovations to accelerate and continue for several years 1. MACC, or ‘Multiple Award Construction Contract’ is Indefinite-Delivery/Indefinite-Quantity (IDIQ) vehicle used by NAVFAC (Naval Facilities Engineering Systems Command) to award construction projects—such as waterfront work, piers, dredging support, facilities upgrades, utilities, etc.—to a pool of pre-qualified contractors.

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• Strategic, accretive M&A Criteria: • Augment, add or enhance a capability • Strategic SMEs or equipment • Geographic expansion • Disciplined valuation • Earnings accretive • Capitalize on long-term demand across marine infrastructure and defense modernization and AI infrastructure • Win larger, higher-value projects with expanded capabilities and deep customer relationships 8 CLEAR, DISCIPLINED STRATEGY BUILT ON A STRENGTHENED FOUNDATION TO DRIVE GROWTH • Expand geographically and into adjacent market offerings • Leverage an investment-light approach to geographic expansion through strong client/partner relationships Organic Growth Expansion Geographic Expansion Disciplined Operational Foundation Strategic Acquisitions • Prioritize high-quality projects at healthy margins • Execute with predictable excellence • Recruit, develop, and retain highly-skilled talent • Leverage technology to drive scale and efficiency

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Deploy capital to drive profitable organic growth Maintain leverage ratio <2.5x Capitalize on strategic opportunities Structure and execute to maximize long-term shareholder value 9 Dec 2030 Senior Credit Facility Maturity a) Net Leverage Ratio calculated as Total Debt less Cash, divided by TTM Adjusted EBITDA OPTIMIZING CAPITAL DEPLOYMENT FOR FUTURE GROWTH AND SHAREHOLDER VALUE Capital Deployment Priorities 1 2 3 4 2.3x Net Leverage as of June 30, 2026(a)

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Heavy Civil | Jetty & Breakwater | Marine | Environmental • 50 years of experience delivering Federal heavy civil construction-- recognized as jetty construction experts and “go-to” provider in harsh environments • Extends and strengthens geographic footprint in Washington, Oregon, Canada, Florida, Alaska, and Hawaii • Augments Orion’s equipment fleet with strategic, high-value marine assets, including multiple Jones Act Vessels • High cultural and values alignment • Consideration paid of $60M, plus additional contingent consideration; expected to be accretive to adj. EBITDA and margin • Closed February 3, 2026 Acquisition of J.E. MCAMIS, Strengthening Marine Capabilities

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11 EXPERIENCED MANAGEMENT TEAM FOCUSED ON GROWTH AND FINANCIAL PERFORMANCE Travis Boone, PE Chief Executive Officer • Transformational leader with significant leadership and management experience across the civil, utility / pipeline and commercial building engineering and construction industries • Prior to joining Orion, served as Regional Chief Executive of AECOM (NYSE:ACM) Travis Boone, PE Chief Executive Officer 30 Years of Experience • Multi-disciplinary finance leader across accounting, tax, FP&A, treasury, financial systems, investor relations, and government compliance. • Further experience in mergers, acquisitions and financial transactions • Former CAO of KBR, Inc. (NYSE:KBR) and previously held leadership positions within KBR finance organization Alison Vasquez Chief Financial Officer 25 Years of Experience • Experience spans global legal, compliance, risk management and oversight across multiple industries • Further experience in corporate and securities law, M&A, corporate governance, legal operations, compliance and contract management • Previous roles have included GC of Newpark Resources and Bristow Group and executive leadership at Transocean Chip Earle General Counsel 25 Years of Experience • Senior Vice President of Strategy & Growth since July 2023 • Experience spans project development, business development leadership, organizational efficiency and innovative & alternative delivery • Prior to joining Orion, held leadership positions at AECOM, most notably as VP of Business Development for ten years Alan Eckman Senior Vice President, Strategy & Growth 25 Years of Experience • SVP of Operations since 2019 • Prior experience in implementing cost savings strategies and project forecasting / controls improvements • Has held multiple construction, project management positions with companies including Kiewit and Zachry Construction Ardell Allred Executive Vice President, Concrete 30 Years of Experience • Most recently SVP at Texas Sterling Construction • Executive-level experience in restructuring, negotiation and resolution as well as division level management with profit and loss responsibilities • Previously held construction and project management positions at companies including Kiewit, Zachry Construction Scott Cromack Executive Vice President, Marine 30 Years of Experience

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12 MISSION-CRITICAL MARINE INFRASTRUCTURE PLATFORM ALIGNED WITH LONG-TERM DEFENSE AND PORT INVESTMENT Construction Dredging Specialty General construction, restoration, maintenance & repair of ports and docks, jetty & breakwater, marine pipelines, marine transportation facilities, bridges and environmental structures Removal of soil, sand and rock from waterways to enhance and preserve navigability Design, salvage, demolition, towing and diving as well as underwater inspection, excavation, repair and engineering $545M $80M 14.7% 2025 Revenue 2025 Adj. EBITDA 2025 Adj. EBITDA Margin Construction solutions spanning port expansion & maintenance, jetty & breakwater, bridge, causeway and marine infrastructure construction services to customers across diversified end markets in the U.S., Pacific Islands, Western Canada, and Caribbean $120M Grand Bahama Shipyard contract: building the first floating dry docks in Atlantic to lift the largest cruise ships in the world $460M U.S. Navy contract to build submarine dry dock at Pearl Harbor 2025 Results

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Data centers, office buildings and complexes, tilt wall warehouses, airport facilities, medical facilities, retail sites, cold storage, and education facilities High-rise buildings, complexes, and stadiums Commercial Structural Wastewater treatment, tank foundations, site work, and terminals and manufacturing sites Industrial Turnkey concrete construction services including place and finish, site work, layout, forming and rebar for clients across manufacturing, data center, institutional, industrial, commercial construction, and multi-family construction end markets with hubs in Texas, Florida, and Arizona 13 DIVERSIFIED CONCRETE CAPABILITIES ALIGNED WITH DATA CENTER, INDUSTRIAL AND COMMERCIAL GROWTH Data centers and campuses High Rise Buildings 50+ 2025 Results $307M $12M 3.9% 2025 Revenue 2025 Adj. EBITDA 2025 Adj. EBITDA Margin

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FINANCIAL PERFORMANCE 14

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$17 $23 $24 $42 2021 2022 2023 2024 2025 2026E Adjusted EBITDA $45 $52 15 HISTORICAL ANNUAL FINANCIAL SUMMARY ($ in millions) $601 $748 $712 $796 $852 $925 2021 2022 2023 2024 2025 2026E Revenue 2021 Guidance Midpoint Guidance Midpoint • 2026 Revenue guidance midpoint signals expected growth • 2026 Revenue guidance represents 54% growth since 2021 • 9% CAGR from 2021-2026 • 2026 Adjusted EBITDA guidance more than triples from 2021 • Adjusted EBITDA guidance represents 25% CAGR from 2021-2026

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16 SECOND QUARTER 2026 RESULTS Q2 2026 Q2 2025 Revenue $222M $205M GAAP Net (Loss) Income per share ($0.10) $0.02 Adjusted EBITDA $8M $11M Adjusted EPS $0.02 $0.07 Adjusted EBITDA Margin 3.5% 5.3%

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17 RECORD $27B OPPORTUNITY PIPELINE TO SUPPORT FUTURE GROWTH $6B $8B $13B $0-$50M $50M-$200M $200M+ Total Pipeline by Anticipated Opportunity Size 70% 30% Total Pipeline by Sector Public Private Total Pipeline by Segment Marine Concrete 12% 88% $5B $11B $11B 2H2026 FY2027 Beyond Total Pipeline by Anticipated Date

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18 FISCAL YEAR 2026 GUIDANCE (AS OF JULY 28, 2026) FY2026 Guidance Annual Growth at Midpoint Revenue $900 to $950 9% Adjusted EBITDA $50 to $54 15% Adjusted EPS $0.23 to $0.30 6% Capex $25 to $35 __ Table in millions, except EPS and percentage changes

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0 100 200 300 400 500 600 700 800 900 1000 New management joined Orion 19 RECENT EVOLUTION OF BACKLOG BACKLOG ($ in millions) RECENT WINS USVI Dredging Project USACE Sargent Beach Jetty and Beach Renourishment Project Bridge Replacement Terminal Wharf Expansion Contract in Texas

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APPENDIX 20

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21 VALUED PARTNER TO HIGHLY DIVERSIFIED CUSTOMER BASE ENERGY DATA CENTERS GOVERNMENT OTHER Long-tenured relationships with customers across federal, state & local government and private enterprise

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NON-GAAP SUPPLEMENTAL INFORMATION 22 Orion Group Holdings, Inc. and Subsidiaries Adjusted EBITDA and Adjusted EBITDA Margin Reconciliations (In Thousands, Except Margin Data) (Unaudited) Three Months Ended Six Months Ended June 30, June 30, 2026 2025 2026 2025 Net (loss) income $ (4,145) $ 841 $ 542 $ (573) Income tax expense (benefit) 474 (212) (6,378) (72) Interest expense, net 2,449 2,827 3,893 4,968 Depreciation and amortization 7,004 5,231 13,391 10,634 EBITDA(1) 5,782 8,687 11,448 14,957 Non-cash share-based compensation 2,006 1,519 3,393 2,642 ERP implementation 54 225 135 830 Severance — 547 — 577 Process improvement initiatives — — — 138 Acquisition and integration costs 21 — 1,634 — Adjusted EBITDA(2) $ 7,863 $ 10,978 $ 16,610 $ 19,144 Adjusted EBITDA margin(2) 3.5 % 5.3 % 3.8 % 4.9 % (1) EBITDA is a non-GAAP measure that represents earnings before interest, taxes, depreciation and amortization. (2) Adjusted EBITDA is a non-GAAP measure that represents EBITDA adjusted for non-cash share-based compensation, ERP implementation, severance, process improvement initiatives and acquisition and integration costs. Adjusted EBITDA margin is a non-GAAP measure calculated by dividing Adjusted EBITDA by contract revenues.

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23 Orion Group Holdings, Inc. and Subsidiaries Reconciliation of Adjusted Net (Loss) Income (In Thousands Except Per Share Information) (Unaudited) Three Months Ended Six Months Ended June 30, June 30, 2026 2025 2026 2025 Net (loss) income $ (4,145) $ 841 $ 542 $ (573) Adjusting items and the tax effects: Non-cash share-based compensation 2,006 1,519 3,393 2,642 Enterprise resource planning (“ERP”) implementation 54 225 135 830 Severance — 547 — 577 Process improvement initiatives — — — 138 Acquisition and integration costs 21 — 1,634 — Amortization of purchased intangibles 395 — 785 — Tax rate of 23% applied to adjusting items(1) (570) (527) (1,368) (963) Reversal of the impact of valuation allowances 3,208 76 (2,187) 290 Adjusted net income $ 969 $ 2,681 $ 2,934 $ 2,941 Adjusted EPS $ 0.02 $ 0.07 $ 0.07 $ 0.07 (1) Items are taxed discretely using the Company's blended tax rate. NON-GAAP SUPPLEMENTAL INFORMATION

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24 (1) EBITDA is a non-GAAP measure that represents earnings before interest, taxes, depreciation and amortization. (2) Adjusted EBITDA is a non-GAAP measure that represents EBITDA adjusted for non-cash share-based compensation, ERP implementation, severance, process improvement initiatives and acquisition and integration costs. Adjusted EBITDA margin is a non-GAAP measure calculated by dividing Adjusted EBITDA by contract revenues. Orion Group Holdings, Inc. and Subsidiaries Adjusted EBITDA and Adjusted EBITDA Margin Reconciliations (In Thousands, Except Margin Data) (Unaudited) NON-GAAP SUPPLEMENTAL INFORMATION

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25 (1) EBITDA is a non-GAAP measure that represents earnings before interest, taxes, depreciation and amortization. (2) Adjusted EBITDA is a non-GAAP measure that represents EBITDA adjusted for non-cash share-based compensation, ERP implementation, severance, process improvement initiatives and acquisition and integration costs. Adjusted EBITDA margin is a non-GAAP measure calculated by dividing Adjusted EBITDA by contract revenues. Orion Group Holdings, Inc. and Subsidiaries Adjusted EBITDA and Adjusted EBITDA Margin Reconciliations (In Thousands, Except Margin Data) (Unaudited) NON-GAAP SUPPLEMENTAL INFORMATION

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26 Orion Group Holdings, Inc. and Subsidiaries Adjusted EBITDA and Adjusted EBITDA Margin Reconciliations (In Thousands, Except Margin Data) (Unaudited) Year Ending December 31, 2021 2022 2023 2024 2025 Net (loss) income $ (14,560) $ (12,612) $ (17,875) $ (1,644) $ 2,488 Income tax expense 502 429 330 348 419 Interest expense, net 4,940 4,352 11,556 13,174 8,223 Depreciation and amortization 25,430 24,057 23,878 22,765 22,262 EBITDA(1) 16,312 16,226 17,889 34,643 33,392 Non-cash share-based compensation 2,401 2,754 2,042 4,009 5,450 Net gain on Port Lavaca South Yard property sale — — (5,202) — — ERP implementation 4,925 1,867 1,378 2,129 1,367 Professional fees related to management transition — 1,118 — — — Severance 96 948 809 104 620 Intangible asset impairment loss — — 6,890 — — Process improvement initiatives — — — 982 138 Acquisition and integration — — — — 494 Loss on extinguishment of debt — — — — 3,777 Net gain on Tampa property sale (6,435) — — — — Adjusted EBITDA(2) $ 17,299 $ 22,913 $ 23,806 $ 41,867 $ 45,238 Adjusted EBITDA margin(2) 2.9 % 3.1 % 5.3 % 5.3 % 5.3 % (1) EBITDA is a non-GAAP measure that represents earnings before interest, taxes, depreciation and amortization. (2) Adjusted EBITDA is a non-GAAP measure that represents EBITDA adjusted for non-cash share-based compensation, net gain on Port Lavaca South Yard property sale, ERP implementation, professional fees related to management transition, severance, intangible impairment loss, process improvement initiatives, acquisition and integration, loss on extinguishment of debt and net gain on Tampa property sale. Adjusted EBITDA margin is a non-GAAP measure calculated by dividing Adjusted EBITDA by contract revenues. NON-GAAP SUPPLEMENTAL INFORMATION

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27 NON-GAAP SUPPLEMENTAL INFORMATION

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28 Orion Group Holdings, Inc. and Subsidiaries Guidance – Adjusted EPS Reconciliation (In Thousands except per share information) (Unaudited) Year Ending December 31, 2026 Low Estimate High Estimate Net income $ 6,600 $ 10,600 Adjusting items and the tax effects: Non-cash share-based compensation 7,300 7,300 ERP implementation 1,100 1,100 Acquisition and integration costs 1,600 1,600 Amortization of purchased intangibles 2,000 2,000 Tax rate of 23% applied to adjusting items(1) (2,800) (2,800) Reversal of the impact of valuation allowances (6,700) (7,600) Adjusted net income(2) $ 9,100 $ 12,200 Adjusted EPS(2) $ 0.23 $ 0.30 (1) Items are taxed discretely using the Company's blended tax rate. (2) Adjusted net income and Adjusted EPS are non-GAAP measures that represent net income adjusted for share-based compensation, ERP implementation, acquisition and integration costs and amortization of purchased intangibles. NON-GAAP SUPPLEMENTAL INFORMATION

Filing Exhibits & Attachments

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