Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ Annual Report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the fiscal year ended December 31, 2021 or ☐ Transition Report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Commission File Number 0-53713 OTTER TAIL CORPORATION (Exact name of registrant as specified in its charter) Minnesota (State or other jurisdiction of incorporation or organiza ...

2021 EARNINGS CONFERENCE CALL February 15, 2022 FORWARD-LOOKING STATEMENT Except for historical information contained here, the statements in this presentation are forward-looking and made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. The words "anticipate," "believe," "could," "estimate," "expect," "goal," "intend," "may," "outlook," "plan," "possible," "potential," "projected," "should," "will," "would" and similar words and expressions are intended to ide ...

Otter Tail Corporation (NASDAQ:OTTR) Q4 2021 Earnings Conference Call February 15, 2022 10:00 AM ET Company Participants Tyler Akerman - Investor Relations Chuck MacFarlane - President and Chief Executive Officer Kevin Moug - Senior Vice President and Chief Financial Officer Conference Call Participants Brian Russo - Sidoti Disclaimer*: This transcript is designed to be used alongside the freely available audio recording on this page. Timestamps within the transcript are designed to help you navigate the au ...

SIDOTI VIRTUAL INVESTOR CONFERENCE January 19-20, 2022 RGB COLORS FORWARD-LOOKING STATEMENT Except for historical information contained here, the statements in this presentation are forward-looking and made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. The words "anticipate," "believe," "could," "estimate," "expect," "intend," "may," "outlook," "plan," "possible," "potential," "should," "will," "would" and similar words and expressions are intended to identi ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ Quarterly Report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended September 30, 2021 or ☐ Transition Report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Commission File Number 0-53713 OTTER TAIL CORPORATION (Exact name of registrant as specified in its charter) Minnesota (State or other jurisdiction of incorporation or ...

Otter Tail Corporation (NASDAQ:OTTR) Q3 2021 Earnings Conference Call November 2, 2021 11:00 AM ET Company Participants Tyler Akerman - Manager of Investor Relations Chuck MacFarlane - President & Chief Executive Officer Kevin Moug - Senior Vice President & Chief Financial Officer Conference Call Participants Brian Russo - Sidoti Sophie Karp - KeyBanc Operator Good morning, and welcome to the Otter Tail Corporation's Q3 2021 Earnings Conference Call. Today's call is being recorded and we will hold a questi ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ Quarterly Report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the quarterly period ended June 30, 2021 or ☐ Transition Report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Commission File Number 0-53713 OTTER TAIL CORPORATION (Exact name of registrant as specified in its charter) Minnesota (State or other jurisdiction of incorporation or orga ...

2021 Q2 EARNINGS CONFERENCE CALL August 3, 2021 RGB COLORS FORWARD-LOOKING STATEMENT Except for historical information contained here, the statements in this presentation are forward-looking and made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. The words "anticipate," "believe," "could," "estimate," "expect," "intend," "may," "outlook," "plan," "possible," "potential," "should," "will," "would" and similar words and expressions are intended to identify forw ...

Otter Tail Corporation (NASDAQ:OTTR) Q2 2021 Earnings Conference Call August 3, 2021 11:00 AM ET Company Participants Loren Hanson - Investor Relations Chuck MacFarlane - President and CEO Kevin Moug - Senior Vice President and Chief Financial Officer Conference Call Participants Chris Ellinghaus - Siebert Williams Brian Russo - Sidoti Sophie Karp - KeyBanc Operator Good morning, and welcome to the Otter Tail Corporation's Q2 2021 Earnings Conference Call. Today's call is being recorded and we will hold a q ...

Otter Tail Corporation (NASDAQ:OTTR) Q1 2021 Earnings Conference Call May 4, 2021 11:00 AM ET Company Participants Loren Hanson - Investor Relations Chuck MacFarlane - President and CEO Kevin Moug - CFO Conference Call Participants Chris Ellinghaus - Siebert Williams Brian Russo - Sidoti Operator Good morning, and welcome to the Otter Tail Corporation's Q1 2021 Earnings Conference Call. Today's call is being recorded. [Operator Instructions] I will now turn the call over to the company for their opening com ...