Glancy Prongay Wolke & Rotter LLP, a leading national shareholder rights law firm, today announced that it has commenced an investigation on behalf of Arq, Inc. (“Arq” or the “Company”) (NASDAQ: ARQ) investors concerning the Company’s possible violations of the federal securities laws.

IF YOU ARE AN INVESTOR WHO LOST MONEY ON ARQ, INC. (ARQ), CLICK HERE TO INQUIRE ABOUT POTENTIALLY PURSUING CLAIMS TO RECOVER YOUR LOSS.

What Happened?

On November 5, 2025, Arq released its third quarter 2025 financial results. Among other items, Arq reported a net loss of $0.7 million, and EPS of -$0.01, missing consensus estimates. Further, the Company disclosed that Arq’s granular activated carbon (“GAC”) facility in Corbin, Kentucky operated “well below capacity, which significantly reduced [the Company’s] financial results,” due to “design issues.” Management revealed it would “now expect to reach full GAC capacity sometime around mid-2026.”

On this news, Arq’s stock price fell $2.25, or 35.4%, to close at $4.10 per share on November 6, 2025, thereby injuring investors.

Then, on March 9, 2026, Arq released its fourth quarter and full year 2025 financial results, reporting a net loss of $50 million, and an EPS of -$0.11, missing consensus estimates. Further, the Company disclosed that it had decided "to pause [its] GAC production project to conduct a comprehensive engineering and production process optimization review” and, as a result, “there will be no GAC production in 2026.” Management further described “fundamental design flaws in the plant.”

On this news, Arq’s stock price fell $1.56, or 48.8%, to close at $1.64 per share on March 10, 2026, thereby injuring investors further.

Contact Us To Participate or Learn More:

If you wish to learn more about this action, or if you have any questions concerning this announcement or your rights or interests with respect to these matters, please contact us.

Charles Linehan, Esq.,
Glancy Prongay Wolke & Rotter LLP,
1925 Century Park East, Suite 2100,
Los Angeles California 90067
Email: shareholders@glancylaw.com
Telephone: 310-201-9150 (Toll-Free: 888-773-9224)
Visit our website at www.glancylaw.com.
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Whistleblower Notice

Persons with non-public information regarding Arq should consider their options to aid the investigation or take advantage of the SEC Whistleblower Program. Under the program, whistleblowers who provide original information may receive rewards totaling up to 30 percent of any successful recovery made by the SEC. For more information, call Charles H. Linehan at 310-201-9150 or 888-773-9224 or email shareholders@glancylaw.com.

About Glancy Prongay Wolke & Rotter LLP

GPWR is a premier law firm with decades of experience representing investors and consumers in securities litigation and other complex class action litigation. Recognizing the firm’s recent successes, GPWR was named one of Law360’s Securities Groups of the Year and ranked second-highest in total investor recoveries by Institutional Shareholder Services Securities Class Action Services in 2025. GPWR’s lawyers have handled cases covering a wide spectrum of corporate misconduct and relating to nearly all industries and sectors. GPWR’s past successes have been widely covered by leading news and industry publications such as The Wall Street Journal, The Financial Times, Bloomberg Businessweek, Reuters, the Associated Press, Barron’s, Investor’s Business Daily, Forbes, and Money. Prior results do not guarantee a similar outcome.

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