# EDGAR Filing Document

**Accession Number:** 0001466593
**File Stem:** 0001466593-23-000081
**Filing Date:** 2023-3
**Character Count:** 2153
**Document Hash:** 5a409801794db0c6df388ef7a8547d75
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001466593-23-000081.hdr.sgml**: 20230307

**ACCESSION NUMBER**: 0001466593-23-000081

**CONFORMED SUBMISSION TYPE**: DEFA14A

**PUBLIC DOCUMENT COUNT**: 3

**FILED AS OF DATE**: 20230307

**DATE AS OF CHANGE**: 20230307

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Otter Tail Corp
- **CENTRAL INDEX KEY:** 0001466593
- **STANDARD INDUSTRIAL CLASSIFICATION:** ELECTRIC SERVICES [4911]
- **IRS NUMBER:** 270383995
- **STATE OF INCORPORATION:** MN
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** DEFA14A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 000-53713
- **FILM NUMBER:** 23711904

**BUSINESS ADDRESS:**
- **STREET 1:** 215 S CASCADE ST
- **STREET 2:** PO BOX 496
- **CITY:** FERGUS FALLS
- **STATE:** MN
- **ZIP:** 56538-0496
- **BUSINESS PHONE:** 866-410-8780

**MAIL ADDRESS:**
- **STREET 1:** 215 S CASCADE ST
- **STREET 2:** PO BOX 496
- **CITY:** FERGUS FALLS
- **STATE:** MN
- **ZIP:** 56538-0496

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Otter Tail Holding Co
- **DATE OF NAME CHANGE:** 20090618

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C. 20549**

**SCHEDULE 14A**

Proxy Statement Pursuant to Section 14(a) of the Securities

Exchange Act of 1934 (Amendment No.)

Filed by the Registrant ☑

Filed by a Party other than the Registrant ☐

Check the appropriate box:

☐ Preliminary Proxy Statement

☐ **Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))**

☐ Definitive Proxy Statement

☑ Definitive Additional Materials

☐ Soliciting Material Pursuant to §240.14a-12

**OTTER TAIL CORPORATION**

(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check all boxes that apply):

☑ No fee required

☐ Fee paid previously with preliminary materials

☐ Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11

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![ottertailcorporation_vxnax.jpg](ottertailcorporation_vxnax.jpg)

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![ottertailcorporation_vxnaxa.jpg](ottertailcorporation_vxnaxa.jpg)

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