Otter Tail faces antitrust class actions over PVC pricing; Q1 profit up 6.6% on rate hikes

Filed May 6, 2026 · Period ending March 31, 2026 · Compared to 10-Q May 7, 2025 · ~2 min read

Key Changes

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  Multiple class action lawsuits filed against Otter Tail and subsidiaries Northern Pipe Products and Vinyltech alleging conspiracy to fix PVC pipe prices in violation of U.S. and Canadian antitrust laws.

  Legal Proceedings verify on EDGAR →
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  Minnesota rate case seeks $44.8M annual revenue increase (17.7%), including accelerated Coyote Station cost recovery due to MPUC order to discontinue plant capacity by December 2031; interim rates of $28.6M took effect January 2026.

  MD&A: Minnesota Rate Case verify on EDGAR →
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  South Dakota rate case settled for $3.3M annual increase (7.7%), below $5.7M requested, with rate moratorium through December 2029; new rates effective April 2026.

  MD&A: South Dakota Rate Case verify on EDGAR →