Otter Tail Corp

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G)

General form for quarterly reports under Section 13 or 15(d)

Results of Operations and Financial Condition

Entry into a Material Definitive Agreement

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

Entry into a Material Definitive Agreement

Specialized Disclosure Report

Other Events

General form for quarterly reports under Section 13 or 15(d)

Results of Operations and Financial Condition

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G)

Beneficial ownership report for a passive holder of more than 5% (Schedule 13G)

Submission of Matters to a Vote of Security Holders

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

Entry into a Material Definitive Agreement

Annual Report Scanned (Paper)

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Annual report pursuant to Section 13 or 15(d) (amendment)

Annual report pursuant to Section 13 or 15(d)

Preliminary Proxy Statement

Results of Operations and Financial Condition

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

General form for quarterly reports under Section 13 or 15(d)

Results of Operations and Financial Condition

General form for quarterly reports under Section 13 or 15(d)

Results of Operations and Financial Condition

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

Other Events

Specialized Disclosure Report

General form for quarterly reports under Section 13 or 15(d)

Results of Operations and Financial Condition

Submission of Matters to a Vote of Security Holders

Entry into a Material Definitive Agreement

Annual Report Scanned (Paper)

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Annual report pursuant to Section 13 or 15(d)

Results of Operations and Financial Condition

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

Specialized Disclosure Report

General form for quarterly reports under Section 13 or 15(d)

Automatic Shelf Registration

Automatic Shelf Registration

Annual Report Scanned (Paper)

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Annual report pursuant to Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

Specialized Disclosure Report

General form for quarterly reports under Section 13 or 15(d)

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Additional Information for Proxy Statement/ Votes

Required Information in Proxy Statement

Annual Report Scanned (Paper)

Definitive Proxy Statement

Annual report pursuant to Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

General form for quarterly reports under Section 13 or 15(d)

Specialized Disclosure Report

General form for quarterly reports under Section 13 or 15(d)

Definitive Proxy Statement

Annual report pursuant to Section 13 or 15(d)

Specialized Disclosure Report

Automatic Shelf Registration

Automatic Shelf Registration

Definitive Proxy Statement

Preliminary Proxy Statement

Specialized Disclosure Report

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Prospectus Supplement for Primary Offering

Specialized Disclosure Report

Definitive Proxy Statement

Specialized Disclosure Report

Automatic Shelf Registration

Automatic Shelf Registration

Definitive Proxy Statement

No description available

Specialized Disclosure Report

Definitive Proxy Statement

Specialized Disclosure Report

Definitive Proxy Statement

Post-effective amendment to an automatic shelf registration statement

No description available

Specialized Disclosure Report

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Automatic Shelf Registration

Automatic Shelf Registration

Prospectus Supplement for Primary Offering

Annual Report Scanned (Paper)

Definitive Proxy Statement

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Post Effective Amendment to S-8

Prospectus Supplement for Primary Offering

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Certification of termination of registration of a class of securities (Section 12(g))

Prospectus Supplement for Primary Offering

Automatic Shelf Registration

KNUTSON PAUL L

KNUTSON PAUL L

KNUTSON PAUL L

Nelson Tyler J

Smestad Jennifer O.

ROGELSTAD TIMOTHY J

Wahlund Todd R

PARTAIN NATHAN I

Nelson Tyler J

Rasche Steven P

Ludford Mary E

Crain Jeanne H

LeBeau Michael E

Clark Christopher B

Johnson Kathryn O

WEBB THOMAS J

ERICKSON JOHN D