Exhibit 99.1

Drilling Tools International Corp. Reports

2026 First Quarter Results

Completes Transition to Fully Independent, Broadly Held Public Company with Refreshed Board

Reaffirms 2026 Outlook

HOUSTON — May 7, 2026 — Drilling Tools International Corp. (NASDAQ: DTI) (“DTI” or the “Company”), a global oilfield services company that designs, engineers, manufactures and provides a differentiated, rental-focused offering of tools for use in onshore and offshore horizontal and directional drilling operations, as well as other cutting-edge solutions across the well life cycle, today reported its results for the three months ended March 31, 2026.

For the first quarter of 2026, DTI generated total consolidated revenue of $38.0 million. First quarter Tool Rental revenue was $28.9 million, and Product Sales revenue totaled approximately $9.0 million. Net Loss attributable to common stockholders for the first quarter was $1.5 million, or a loss of $0.04 per share. Adjusted Net Loss(1) was $1.0 million and Adjusted Diluted EPS(1) for the first quarter was a loss of $0.03 per diluted share. First quarter Adjusted EBITDA(1) was $7.5 million and Adjusted Free Cash Flow(1)(2) was a loss of $160,000. As of March 31, 2026, DTI had $2.8 million of cash and cash equivalents, and net debt of $48.9 million.

Wayne Prejean, Chairman of the Board and Chief Executive Officer, stated, “Our first quarter results came in largely in-line with our expectations minus some softness in Canada due to the spring breakup arriving earlier this year. While we continue to operate in a complicated market environment, including uncertainty in the Middle East and volatile commodity prices, we are leveraging our differentiated, specialized product suite to capture international market share and preserve our leading position in downhole drilling tools worldwide. I’m also pleased that, despite a 4% year-over-year decline in global rig count, we remain confident in our ability to achieve and reaffirm our full year guidance, which constitutes growth at the midpoint when compared to our 2025 results. Our ClearPath and Drill-N-Ream product lines are gaining significant traction with international offshore operators as well as customers managing complex well configurations, enhancing our mix toward higher-margin, technology-enabled solutions to deliver improved returns for DTI.

“During the first quarter, we reached another important milestone. Our primary private equity sponsor, HHEP, completed the distribution of its remaining DTI shares to its limited partners. This materially increases our public float and trading liquidity. This distribution, together with the recent refreshment to the composition of our Board of Directors, marks a significant transition for DTI into a fully independent public company with broader ownership and a governance framework tailored to our next phase of growth.

“Looking ahead, we continue to expect activity in the first half of 2026 to remain relatively flat, but we see tangible catalysts emerging that should drive improvement later in the year. To capitalize on these opportunities, we plan to make targeted investments in select international markets to capture incremental demand and deploy our specialized technologies more efficiently into regions with complex well requirements. Near term, we expect our second quarter results to benefit from the earlier-than-expected spring break up in Canada, which should translate into an earlier post-breakup rebound. We are excited about the opportunities in front of us, both organic and inorganic, and I look forward to sharing updates on our growth plans in the coming quarters as we build on this solid foundation,” concluded Prejean.

2026 Full Year Outlook

2026 First Quarter Conference Call Information

DTI's 2026 first quarter conference call can be accessed live via dial-in or webcast on Friday, May 8, 2026 at 10:00 a.m. Eastern Time (9:00 a.m. Central Time) by dialing 201-389-0869 and asking for the DTI call at least 10 minutes prior to the start time, or via live webcast by logging onto the webcast at this URL address: https://investors.drillingtools.com/news-events/events. An audio replay will be available through May 15, 2026 by dialing 201-612-7415 and using passcode 13759566#. Also, an archive of the webcast will be available shortly after the call at https://investors.drillingtools.com/news-events/events for 90 days. Please submit any questions for management prior to the call via email to [email protected].

About Drilling Tools International Corp.

DTI is a Houston, Texas based leading oilfield services company that manufactures and rents downhole drilling tools used in horizontal and directional drilling of oil and natural gas wells. With roots dating back to 1984, DTI operates from 15 service and support centers across North America and maintains 11 international service and support centers across the EMEA and APAC regions. To learn more about DTI, please visit: www.drillingtools.com.

Contact:

DTI Investor Relations

Ken Dennard / Natalie Hairston

[email protected]

Forward-Looking Statements

This press release may include, and oral statements made from time to time by representatives of the Company may include, “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. Statements other than statements of historical fact included in this press release are forward-looking statements. The words “anticipate,” “believe,” “continue,” “could,” “estimate,” “expect,” “intends,” “may,” “might,” “plan,” “possible,” “potential,” “predict,” “project,” “should,” “will,” “would” and similar expressions may identify forward-looking statements, but the absence of these words does not mean that a statement is not forward looking. These forward-looking statements include, but are not limited to, statements regarding DTI and its management team’s expectations, hopes, beliefs, intentions or strategies regarding the future. In addition, any statements that refer to projections, forecasts or other characterizations of future events or circumstances, including any underlying assumptions, are forward-looking statements. Forward-looking statements in this press release may include, for example, statements about: (1) the demand for DTI’s products and services, which is influenced by the general level activity in the oil and gas industry; (2) DTI’s ability to retain its customers, particularly those that contribute to a large portion of its revenue; (3) DTI’s ability to employ and retain a sufficient number of skilled and qualified workers, including its key personnel; (4) DTI’s ability to source tools and raw materials at a reasonable cost; (5) DTI’s ability to market its services in a competitive industry; (6) DTI’s ability to execute, integrate and realize the benefits of acquisitions, and manage the resulting growth of its business; (7) potential liability for claims arising from damage or harm caused by the operation of DTI’s tools, or otherwise arising from the dangerous activities that are inherent in the oil and gas industry; (8) DTI’s ability to obtain additional capital; (9) potential political, regulatory, economic and social disruptions in the countries in which DTI conducts business, including changes in tax laws or tax rates; (10) DTI’s dependence on its information technology systems, in particular Customer Order Management Portal and Support System, for the efficient operation of DTI’s business; (11) DTI’s ability to comply with applicable laws, regulations and

rules, including those related to the environment, greenhouse gases and climate change; (12) DTI’s ability to maintain an effective system of disclosure controls and internal control over financial reporting; (13) the potential for volatility in the market price of DTI’s common stock; (14) the impact of increased legal, accounting, administrative and other costs incurred as a public company, including the impact of possible shareholder litigation; (15) the potential for issuance of additional shares of DTI’s common stock or other equity securities; (16) DTI’s ability to maintain the listing of its common stock on Nasdaq; and (17) other risks and uncertainties separately provided to you and indicated from time to time described in DTI’s most recent Forms 10-K, 10-Q and 8-K filed with or furnished to the Securities and Exchange Commission (the “SEC”). You should carefully consider the risks and uncertainties including those described in Part I, Item 1A – “Risk Factors” of our Annual Report on Form 10-K filed on March 6, 2026 and in comparable “Risk Factor” sections of our Quarterly Reports on Form 10-Q filed after such Form 10-K. Such forward-looking statements are based on the beliefs of management of DTI, as well as assumptions made by, and information currently available to DTI’s management and are subject to numerous conditions, many of which are beyond the control of DTI. Actual results could differ materially from those contemplated by the forward-looking statements as a result of certain factors detailed in DTI’s most recent Forms 10-K, 10-Q and 8-K filed with or furnished to the SEC. All subsequent written or oral forward-looking statements attributable to the Company or persons acting on its behalf are qualified in their entirety by this paragraph. The Company undertakes no obligation to update these statements for revisions or changes after the date of this release, except as required by law.

Non-GAAP Financial Measures

This release includes Adjusted EBITDA, Adjusted Free Cash Flow, Net Debt, Adjusted Basic Earnings (Loss) Per Share, Adjusted Diluted Earnings (Loss) Per Share and Adjusted Net Income (Loss) measures. Each of the metrics are “non-GAAP financial measures” as defined in Regulation G of the Securities Exchange Act of 1934.

Adjusted EBITDA is a supplemental non-GAAP financial measure that is used by management and external users of our financial statements, such as industry analysts, investors, lenders and rating agencies. Adjusted EBITDA is not a measure of net earnings or cash flows as determined by GAAP. We define Adjusted EBITDA as net earnings (loss) before interest, taxes, depreciation and amortization, further adjusted for (i) goodwill and/or long-lived asset impairment charges, (ii) stock-based compensation expense, (iii) restructuring charges, (iv) transaction and integration costs related to acquisitions and (v) other expenses or charges to exclude certain items that we believe are not reflective of ongoing performance of our business.

We believe Adjusted EBITDA and Adjusted EBITDA Margin are useful because it allows us to supplement the GAAP measures in order to more effectively evaluate our operating performance and compare the results of our operations from period to period without regard to our financing methods or capital structure. We exclude the items listed above in arriving at Adjusted EBITDA because these amounts can vary substantially from company to company within our industry depending upon accounting methods and book values of assets, capital structures and the method by which the assets were acquired. Adjusted EBITDA should not be considered as an alternative to, or more meaningful than, net income as determined in accordance with GAAP, or as an indicator of our operating performance or liquidity. Certain items excluded from Adjusted EBITDA are significant components in understanding and assessing a company’s financial performance, such as a company’s cost of capital and tax structure, as well as the historic costs of depreciable assets, none of which are components of Adjusted EBITDA. Our computations of Adjusted EBITDA may not be comparable to other similarly titled measures of other companies.

Adjusted Free Cash Flow is a supplemental non-GAAP financial measure, and we define Adjusted Free Cash Flow as Adjusted EBITDA less Gross Capital Expenditures. We use Adjusted Free Cash Flow as a financial performance measure used for planning, forecasting, and evaluating our performance. We believe that Adjusted Free Cash Flow is useful to enable investors and others to perform comparisons of current and historical performance of the Company. As a performance measure, rather than a liquidity measure, the most closely comparable GAAP measure is net income (loss).

Net Debt is a supplemental non-GAAP financial measure, and we define Net Debt as total debt less cash and cash equivalents. We use Net Debt to determine our outstanding debt obligations that would not be readily satisfied by our cash and cash equivalents on hand. We believe this metric is useful to analysts and investors in determining our leverage position since we have the ability to, and may decide to, use a portion of our cash and cash equivalents to reduce debt.

We define Adjusted Net Income (Loss) as consolidated net income (loss) adjusted for (i) goodwill and/or long-lived asset impairment charges, (ii) restructuring charges, (iii) transaction and integration costs related to acquisitions, (iv) income tax expense which is calculated by applying a 25% effective tax rate to adjusted pre-tax income, and (v) other expenses or charges to exclude certain items that we believe are not reflective of the ongoing performance of our business. We believe Adjusted Net Income (Loss) is useful because it allows us to exclude non-recurring items in evaluating our operating performance.

We define Adjusted Basic Earnings (Loss) and Adjusted Diluted Earnings (Loss) per share as the quotient of adjusted net income (loss) and diluted weighted average common shares. We believe that Adjusted Diluted Earnings (Loss) per share provides useful information to investors because it allows us to exclude non-recurring items in evaluating our operating performance on a diluted per share basis.

This release also includes certain projections of non-GAAP financial measures. Reconciliation of these items to net income include gains or losses on sale or consolidation transactions, accelerated depreciation, impairment charges, gains or losses on retirement of debt, variations in effective tax rate and fluctuations in net working capital, which are difficult to predict and estimate and are primarily dependent on future events.

The following tables present a reconciliation of the non-GAAP financial measures of Adjusted EBITDA, Adjusted Free Cash Flow and Adjusted Net Income to the most directly comparable GAAP financial measures for the periods indicated: