Exhibit 99.1

NWPX Infrastructure, Inc. Announces Third Quarter 2025 Financial Results

VANCOUVER, Washington—October 29, 2025—NWPX Infrastructure, Inc. (NASDAQ: NWPX) (the “Company”), a leading manufacturer of water-related infrastructure products, today announced its financial results for the third quarter ended September 30, 2025. The Company will broadcast its third quarter 2025 earnings conference call on Thursday, October 30, 2025 at 7:00 a.m. PT.

Management Commentary

“We delivered our strongest quarter in Company history, achieving consolidated revenue of $151.1 million, up 13.4% compared to the previous quarter, and a gross margin of 21.3%, reflecting 230 basis points of sequential quarter margin expansion,” said Scott Montross, President and Chief Executive Officer of NWPX Infrastructure, Inc. “Our enhanced profitability led to another quarter of strong operating cash flow generation totaling $21.0 million. These results reflect the continued strength of our WTS and Precast businesses and the exceptional execution of our teams.”

Mr. Montross continued, “Our WTS business delivered record revenue of $103.9 million and record gross profit of $22.1 million, with gross margin expanding nearly 350 basis points over the prior quarter to 21.3%. These results were driven by stronger than anticipated customer shipping requirements and strong project pricing levels. Our backlog including confirmed orders remained above $300 million at quarter-end, despite the elevated shipping activity, positioning us well for continued strength throughout the fourth quarter. Our Precast business also continued to perform well with revenue only slightly below the record level achieved last quarter on relatively consistent margins. We have continued to see improving momentum in the non-residential portion of our Precast business, which should be a key driver for Precast margin improvement moving forward.”

Mr. Montross concluded, “As we look ahead into the fourth quarter and manage through the seasonally slower period impacted by weather and holidays, we anticipate WTS revenue and margins comparable to last year’s levels, while Precast revenue and margins are expected to show a modest year-over-year improvement. In addition, we expect the fourth quarter to be the strongest project bidding period of 2025 which should result in backlog growth and enable us to enter 2026 from a position of strength. Our record third quarter 2025 results continue to demonstrate the resilience of our business model, the durability of our end markets, and the exceptional commitment of our employees who continue to drive performance across both segments.”

Third Quarter 2025 Financial Results

Consolidated

Water Transmission Systems Segment (WTS)

Precast Infrastructure and Engineered Systems Segment (Precast)

Balance Sheet, Cash Flow, and Capital Allocation

1 NWPX Infrastructure, Inc. defines “backlog” as the balance of remaining performance obligations under signed contracts for Water Transmission Systems products for which revenue is recognized over time.

2 NWPX Infrastructure, Inc. defines “confirmed orders” as Water Transmission Systems projects for which the Company has been notified that it is the successful bidder, but a binding agreement has not been executed.

3 NWPX Infrastructure, Inc. defines “order book” as unfulfilled orders outstanding at the measurement date for its Precast Infrastructure and Engineered Systems segment.

4 In the third quarter of 2018 the Company reported net income of $27.8 million, or $2.86 per diluted share which, amongst other non-recurring items, included a bargain purchase gain of $21.9 million associated with our acquisition of Ameron Water Transmission Group, LLC. Without this non-cash item and other non-recurring items reported for that quarter, the adjusted net income reconciled to $2.1 million, or $0.21 per share. See reconciliation of Non-GAAP Financial Measures in our Form 8‑K filed on November 8, 2018 for additional information.

Conference Call Details

A conference call and simultaneous webcast to discuss the Company’s third quarter 2025 financial results will be held on Thursday, October 30, 2025, at 7:00 a.m. Pacific Time. The call will be broadcast live on the Investor Relations section of the Company’s website at investor.nwpipe.com and will be archived online upon completion of the conference call. For those unable to listen to the live call, a replay will be available approximately three hours after the event and will remain available until Thursday, November 13, 2025, by dialing 1‑844‑512‑2921 in the U.S. or 1‑412‑317‑6671 internationally and entering the replay access code: 13756400.

About NWPX Infrastructure, Inc.

Founded in 1966, NWPX Infrastructure, Inc. is a leading manufacturer of water-related infrastructure products. Under the Northwest Pipe Company brand, the Company is the largest manufacturer of engineered water transmission systems in North America and produces steel casing pipe, bar-wrapped concrete cylinder pipe, and pipeline system joints and fittings. The Company also provides solution-based products for a wide range of markets including high-quality reinforced precast concrete products and lined precast sanitary sewer system components, which are manufactured under the NWPX Geneva brand, as well as water distribution and management equipment including pump lift stations, wastewater pretreatment, and stormwater quality products through the NWPX Park brand. Strategically positioned to meet growing water and wastewater infrastructure needs, the Company’s skilled team is committed to quality and innovation while upholding its core values of accountability, commitment, and teamwork. Headquartered in Vancouver, Washington, the Company operates 13 manufacturing facilities across North America. For more information, please visit www.nwpx.com.

Forward-Looking Statements

Statements in this press release by Scott Montross contain “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995 and Section 21E of the Securities Exchange Act of 1934, as amended, that are based on current expectations, estimates, and projections about the Company’s business, management’s beliefs, and assumptions made by management. These statements are not guarantees of future performance and involve risks and uncertainties that are difficult to predict. Therefore, actual outcomes and results may differ materially from what is expressed or forecasted in such forward-looking statements as a result of a variety of important factors. While it is impossible to identify all such factors, those that could cause actual results to differ materially from those estimated by the Company include changes in demand and market prices for its products, product mix, bidding activity and order modifications or cancelations, timing of customer orders and deliveries, production schedules, price and availability of raw materials, excess or shortage of production capacity, product quality assurance failures that result in decreased sales and operating margin, product returns, product liability, warranty, or other claims, international trade policy and regulations, changes in trade policy (in particular with Canada and Mexico) and duties imposed on imports and exports and the related impacts on the Company, economic uncertainty and associated trends in macroeconomic conditions, including potential recession, inflation, and the state of the housing and commercial construction markets, interest rate risk and changes in market interest rates, including the impact on the Company’s customers and related demand for its products, the Company’s ability to identify and complete internal initiatives and/or acquisitions in order to grow its business, the Company’s ability to effectively integrate future acquisitions into its business and operations that produce accretive financial results, effects of security breaches, computer viruses, and cybersecurity incidents, timing and amount of share repurchases, impacts of U.S. tax reform legislation on the Company’s results of operations, and the impact on its customers and related demand for its products, delays or reductions in state or local government spending due to revisions to federal appropriations brought on by policy changes, staffing levels or the inability to pass budget reconciliation legislation, adequacy of the Company’s insurance coverage, supply chain challenges, the Company’s ability to attract and retain talented employees, impact of geopolitical trends, changes, and events, including the various military conflicts or tensions and the regional and global ramifications of these conditions, operating problems at the Company’s manufacturing operations including fires, explosions, inclement weather, and floods and other natural disasters, effectiveness of future implementations or conversions of enterprise resource planning or other key system, material weaknesses in the Company’s internal control over financial reporting and its ability to remediate such weaknesses, impacts of pandemics, epidemics, or other public health emergencies, and other risks discussed in the Company’s Annual Report on Form 10‑K for the year ended December 31, 2024 and from time to time in its other Securities and Exchange Commission filings and reports. Such forward-looking statements speak only as of the date on which they are made, and the Company does not undertake any obligation to update any forward-looking statement to reflect events or circumstances after the date of this release. If the Company does update or correct one or more forward-looking statements, investors and others should not conclude that it will make additional updates or corrections with respect thereto or with respect to other forward-looking statements.

Non-GAAP Financial Measures

The Company is presenting backlog including confirmed orders. This non-GAAP financial measure is provided to better enable investors and others to assess the Company’s ongoing operating results and compare them with its competitors. This should be considered a supplement to, and not a substitute for, or superior to, financial measures calculated in accordance with GAAP.

For more information, visit www.nwpx.com.

Contact:

Aaron Wilkins

Chief Financial Officer

NWPX Infrastructure, Inc.

investors@nwpx.com

Or

Addo Investor Relations

nwpx@addo.com

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