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Midwest Insulation Services Inc. v. Johns Manville Corporation
Case Number:
1:25-cv-00534
Court:
Nature of Suit:
Multi Party Litigation:
Class Action
Judge:
Firms
Companies
Sectors & Industries:
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November 14, 2025
Buyer Defends Antitrust Claims Against Berkshire Subsidiary
A Nebraska-based insulation company has urged a Colorado federal judge to keep alive the company's proposed antitrust class action against a Berkshire Hathaway-owned firm, arguing its claims are timely and plausibly show the subsidiary illegally monopolized calcium silicate insulation.
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October 23, 2025
Judge Stays Discovery In Berkshire Subsidiary Antitrust Case
A federal judge on Thursday opted to stay the majority of discovery in a proposed antitrust class action against a Berkshire Hathaway-owned maker of calcium silicate insulation, or calsil, finding the cost of discovery in the case would be too "voluminous" to sort through with a pending motion for dismissal.
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February 19, 2025
Buyers Say Berkshire Unit's Threats Raised Prices
A company that buys calsil insulation filed a proposed class action on Wednesday against a Berkshire Hathaway-owned maker of the insulation, claiming a Colorado jury's antitrust verdict shows the manufacturer engaged in anticompetitive practices and passed on monopoly prices to buyers.