Otter Tail Corporation will issue a news release announcing first quarter 2022 earnings results on Monday, May 2, 2022 and will host a live conference call and webcast on Tuesday, May 3, 2022 at 10:00 a.m. CT to discuss the corporation's financial and operating performance.

Accompanying slides will be posted on the corporation's website before the webcast begins. To access the live webcast, go to www.ottertail.com/presentations and select "Webcast." Please allow time prior to the call to visit the site and download any software required to listen. A copy of the webcast will be available on the corporation's website shortly after the call.

Dial 877-312-8789 to be able to ask a question during the conference call, or dial 866-634-1342 to listen only. Please contact Tyler Akerman at 218-998-7110 or takerman@ottertail.com with any questions on how to participate.

About Otter Tail Corporation: Otter Tail Corporation has interests in diversified operations that include an electric utility and manufacturing businesses. Otter Tail Corporation stock trades on the NASDAQ Global Select Market under the symbol OTTR. The latest investor and corporate information is available at www.ottertail.com. Corporate offices are located in Fergus Falls, Minnesota, and Fargo, North Dakota.

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Otter Tail Corporation Will Host Conference Call on First Quarter 2022 Financial Results