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Otter Tail Corp

For the period ended Mar 31, 2026. Filed May 6, 2026.

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A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.

Mar 31, 2026 · Filed May 6, 2026

OTTR$79.86+1.8%Stored close · as of Nov 9, 2026

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Item 1A. Risk Factors

ITEM 1A.RISK FACTORS

There have been no material changes from the risk factors disclosed in Item 1A, Risk Factors, of our Annual Report on Form 10-K for the year ended December 31, 2025.

Purchases of Otter Tail Corporation common shares were made on the open market during the three months ended March 31, 2026 as follows:

PeriodTotal Number of Shares PurchasedAverage Price Paid per ShareTotal Number of Shares Purchased as Part of Publicly Announced Plans or Programs(3)Maximum Number (or Approximate Dollar Value) of Shares that May Yet Be Purchased Under the Plans or Programs(3)
January 2026(1)16,875$81.41—$—
February 2026(2)3,15786.11——
March 2026————
Total20,032$82.15—$—
(1) These purchases were made to satisfy obligations under our Employee Stock Purchase Plan as we elected to acquire shares in the open market to fulfill share issuances to plan participants.
(2) These purchases were made in connection with our Employee Stock Ownership Plan as we elected to acquire shares in the open market to fulfill share contributions to the plan.
(3) We do not have any publicly announced share repurchase plans or programs.
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The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.