Timothy J. Rogelstad - 13 Apr 2026 Form 4 Insider Report for Otter Tail Corp (OTTR)

Reporting relationship: President
Issuer ticker: OTTR
Reported as of: 13 Apr 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 15 Apr 2026, 11:43:23 UTC
Prior SEC filing: 12 Feb 2026
Source filing: View source filing
Reporting owner signature: /s/ Timothy J. Rogelstad by James A. Versteeg, Attorney-in-Fact

Key filing fact

Timothy J. Rogelstad filed Form 4 for Otter Tail Corp (OTTR) on 15 Apr 2026.

Key facts

This page summarizes Timothy J. Rogelstad's Form 4 filing for Otter Tail Corp (OTTR).
1 reported transaction and 5 derivative rows are listed below.
Accepted by SEC: 15 Apr 2026, 11:43.

Change

Previous filing in this sequence was filed on 12 Feb 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001605621 Primary reporting owner

ROGELSTAD TIMOTHY J

Relationship: President
Address: 215 SOUTH CASCADE STREET, FERGUS FALLS
Signature: /s/ Timothy J. Rogelstad by James A. Versteeg, Attorney-in-Fact
Signature date: 15 Apr 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

OTTR holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 61,089
Date: 13 Apr 2026
Ownership: Direct
Footnotes: F1

OTTR holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 3,371
Date: 13 Apr 2026
Ownership: By ESOP

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

OTTR transaction Derivative

Restricted Stock Units

Award

Transaction value
Shares: +1,400
Change %
Price: $0.000000^*
Shares after: 1,400
Date: 13 Apr 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 1,400
Exercise price
Footnotes: F2, F3

OTTR holding Derivative

Restricted Stock Units

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 450
Date: 13 Apr 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 450
Exercise price
Footnotes: F3, F4

OTTR holding Derivative

Restricted Stock Units

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 700
Date: 13 Apr 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 700
Exercise price
Footnotes: F3, F4

OTTR holding Derivative

Restricted Stock Units

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 1,275
Date: 13 Apr 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 1,275
Exercise price
Footnotes: F3, F4

OTTR holding Derivative

Restricted Stock Units

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 1,600
Date: 13 Apr 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 1,600
Exercise price
Footnotes: F2, F3

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 4 footnotes

Footnote F1

Total direct holdings include shares acquired individually through dividend reinvestment, Employee Stock Purchase Plan, and acquired pursuant to Restricted Stock Awards and Performance Share Awards.

Footnote F2

Each restricted stock unit represents a contingent right to receive a cash payment equal to the fair market value of one share of Otter Tail Corporation common stock upon vesting.

Footnote F3

The restricted stock units vest in four equal annual installments beginning the date shown above.

Footnote F4

Each restricted stock unit represents a contingent right to receive one share of Otter Tail Corporation stock.