Exhibit 99.1

Contact:

Michael G. McAuley

Senior Vice President, Chief Financial Officer and Treasurer

(412) 429-2472

mmcauley@ampcopgh.com

FOR IMMEDIATE RELEASE

CARNEGIE, PA

July 18, 2025

Ampco-Pittsburgh Corporation Issues Reminder Regarding Warrant Expiration

Carnegie, PA, July 18, 2025 – Ampco-Pittsburgh Corporation (NYSE: AP, the “Corporation”) is advising holders of its publicly traded Series A warrants (NYSE American: AP WS) that the warrants will expire and not be exercisable after 5:00 p.m., New York time, on August 1, 2025 (the “Expiration Date”), in accordance with the warrant agreement.

The NYSE has notified the Corporation that trading in the warrants on the NYSE American will be suspended prior to the opening of trading on July 31, 2025 to ensure all trades in the warrants settle in time to allow the purchasers of such warrants to exercise the warrants on or before the Expiration Date.

Further information regarding the warrants is available on the Corporation’s website at www.ampcopgh.com under the heading, Investors.

This news release is not intended to and does not constitute an offer to sell or the solicitation of an offer to subscribe for or buy or an invitation to purchase or subscribe for any securities or the solicitation of any vote or approval in any jurisdiction, nor shall there be any sale, issuance or transfer of securities in any jurisdiction in contravention of applicable law. 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.

About Ampco-Pittsburgh Corporation

Ampco-Pittsburgh Corporation manufactures and sells highly engineered, high-performance specialty metal products and customized equipment utilized by industry throughout the world. Through its operating subsidiary, Union Electric Steel Corporation, it is a leading producer of forged and cast rolls for the global steel and aluminum industries. It also manufactures open-die

forged products that are sold principally to customers in the steel distribution market, oil and gas industry, and the aluminum and plastic extrusion industries. The Corporation is also a producer of air and liquid processing equipment, primarily custom-engineered finned tube heat exchange coils, large custom air handling systems and centrifugal pumps. It operates manufacturing facilities in the United States, England, Sweden, and Slovenia and participates in three operating joint ventures located in China. It has sales offices in North America, Asia, Europe, and the Middle East. Corporate headquarters is located in Carnegie, Pennsylvania.

FORWARD-LOOKING STATEMENTS

The Private Securities Litigation Reform Act of 1995 (the “Act”) provides a safe harbor for forward-looking statements made by us or on behalf of Ampco-Pittsburgh Corporation and its subsidiaries (collectively, “we,” “us,” “our,” or the “Corporation”). This press release may include, but is not limited to, statements about operating performance, trends and events we expect or anticipate will occur in the future, statements about sales and production levels, timing of orders for our products, restructurings, the impact from pandemics and geopolitical conflicts, profitability and anticipated expenses, inflation, the global supply chain, tariffs and global trade, future proceeds from the exercise of outstanding warrants, and cash outflows. All statements in this document other than statements of historical fact are statements that are, or could be, deemed “forward-looking statements” within the meaning of the Act and words such as “may,” “will,” “intend,” “believe,” “expect,” “anticipate,” “estimate, “project,” “target,” “goal,” “forecast” and other terms of similar meaning that indicate future events and trends are also generally intended to identify forward-looking statements. Forward-looking statements speak only as of the date on which such statements are made, are not guarantees of future performance or expectations, and involve risks and uncertainties. For us, these risks and uncertainties include, but are not limited to: inability to maintain adequate liquidity to meet our operating cash flow requirements, repay maturing debt and meet other financial obligations; economic downturns, cyclical demand for our products and insufficient demand for our products; excess global capacity in the steel industry; inability to successfully restructure our operations and/or invest in operations that will yield the best long-term value to our shareholders; liability of our subsidiaries for claims alleging personal injury from exposure to asbestos-containing components historically used in certain products of our subsidiaries; inability to obtain necessary capital or financing on satisfactory terms to acquire capital expenditures that may be necessary to support our growth strategy; inoperability of certain equipment on which we rely; increases in commodity prices or insufficient hedging against increases in commodity prices, reductions in electricity and natural gas supply or shortages of key production materials for us or our customers; inability to satisfy the continued listing requirements of the New York Stock Exchange or the NYSE American Exchange; potential attacks on information technology infrastructure and other cyber-based business disruptions; fluctuations in the value of the U.S. dollar relative to other currencies; changes in the existing regulatory environment; consequences of pandemics and geopolitical conflicts; work stoppage or another industrial action on the part of any of our unions; failure to maintain an effective system of internal control; changes in the global economic environment, inflation, elevated interest rates, recessions or prolonged periods of slow economic growth, and global instability and actual and threatened geopolitical conflict; and those discussed more fully elsewhere in

Item 1A, Risk Factors, in Part I of the Corporation’s latest Annual Report on Form 10-K and Part II of the latest Quarterly Report on Form 10-Q. We cannot guarantee any future results, levels of activity, performance or achievements. In addition, there may be events in the future that we are not able to predict accurately or control which may cause actual results to differ materially from expectations expressed or implied by forward-looking statements. Except as required by applicable law, we assume no obligation, and disclaim any obligation, to update forward-looking statements whether as a result of new information, events or otherwise.

AMPCO PITTSBURGH CORP 8-K