Mosaic Bankruptcy Filing Disrupts Silica Exposure Lawsuits Against Walker Zanger

On July 8, 2025, Mosaic Companies LLC and several affiliates, including Walker Zanger LLC, filed for Chapter 11 bankruptcy protection in the U.S. Bankruptcy Court for the District of Delaware. Walker Zanger, a luxury tile and stone supplier, is named in more than 150 lawsuits filed by fabrication workers alleging exposure to hazardous silica and other toxins.

With the bankruptcy filing, all ongoing litigation against Walker Zanger, including these silica-related personal injury cases, is now stayed under the Bankruptcy Code. Plaintiffs and their counsel must now navigate the Chapter 11 process to preserve their clients’ rights and position themselves for potential recovery.

Plaintiffs’ Counsel Should Take Action Now

The courts have not formally designated the silica claims as a mass tort. However, the number of claims, the shared factual allegations, and the central role of a single defendant strongly suggest that these claims may ultimately be grouped and treated collectively within Mosaic's bankruptcy case.

Walker Zanger’s silica litigation is now part of a broader Chapter 11 strategy that includes:

• A proposed $17.5 million sale of Walker Zanger and Anthology to a third-party buyer
• A wind-down of Mosaic’s remaining business lines
• A DIP financing package and milestones designed to expedite case resolution

At this stage, there is no indication that the bankruptcy plan will include provisions to resolve or compensate silica-related claims. No trust, claims resolution process, or other dedicated treatment for tort claimants has been proposed. Plaintiffs’ counsel should engage early in the Chapter 11 process to ensure their clients’ rights are protected and their voices heard.

Morris James Can Help

At Morris James, we routinely represent tort claimants, mass tort committees, and referring counsel in large-scale bankruptcy proceedings that involve personal injury litigation. Our team has advised on bankruptcies including:

• Boy Scouts of America (gross misconduct)
• Mallinckrodt Pharmaceuticals (opioids)
• Shiloh Industries Inc. (toxic exposure and product liability)
• Proterra Inc. (product recalls and supply chain disputes)
• The Weinstein Company (gross misconduct)

We work in partnership with mass tort firms and referring lawyers to:

• Monitor filings, deadlines, and sale activity
• Advocate for tort claimants in the plan process
• Secure committee representation or negotiate settlements
• Protect and position claims for maximum recovery

Learn More or Connect With Our Team

For plaintiffs’ counsel and others tracking the Mosaic bankruptcy and silica exposure litigation against Walker Zanger, we developed a dedicated resource with key filings, case developments, and strategic insights.

If you represent plaintiffs in silica-related cases or clients facing similar risks, we encourage you to connect with us to assess the implications of the Mosaic bankruptcy on your current and future matters. For more information, please contact Eric Monzo.

While the courts have not formally designated the silica claims as a mass tort, the number of claims, the shared factual allegations, and the central role of a single defendant strongly suggest that these claims may ultimately be grouped and treated collectively within the bankruptcy case.