Timothy J. Rogelstad - 06 Feb 2026 Form 4 Insider Report for Otter Tail Corp (OTTR)

Role
Sr VP, Electric Platform
Signature
/s/ Timothy J. Rogelstad by James A. Versteeg, Attorney-in-Fact
Issuer symbol
OTTR
Transactions as of
06 Feb 2026
Net transactions value
-$67,014
Form type
4
Filing time
09 Feb 2026, 17:17:47 UTC
Previous filing
13 Feb 2025
Next filing
12 Feb 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
ROGELSTAD TIMOTHY J Sr VP, Electric Platform 215 SOUTH CASCADE STREET, FERGUS FALLS /s/ Timothy J. Rogelstad by James A. Versteeg, Attorney-in-Fact 09 Feb 2026 0001605621

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction OTTR Common Stock Options Exercise +1,625 +2.9% 57,655 06 Feb 2026 Direct F1
transaction OTTR Common Stock Tax liability $67,014 -763 -1.3% $87.83 56,892 06 Feb 2026 Direct F2, F3
holding OTTR Common Stock 3,337 06 Feb 2026 By ESOP

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction OTTR Restricted Stock Units Options Exercise $0 -400 -100% $0.000000 0 06 Feb 2026 Common Stock 0 Direct F1, F4
transaction OTTR Restricted Stock Units Options Exercise $0 -450 -50% $0.000000 450 06 Feb 2026 Common Stock 450 Direct F1, F4
transaction OTTR Restricted Stock Units Options Exercise $0 -350 -33% $0.000000 700 06 Feb 2026 Common Stock 700 Direct F1, F4
transaction OTTR Restricted Stock Units Options Exercise $0 -425 -25% $0.000000 1,275 06 Feb 2026 Common Stock 1,275 Direct F1, F4
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Each restricted stock unit represents a contingent right to receive one share of Otter Tail Corporation stock.
F2 These shares were withheld by the Corporation to pay taxes due upon vesting of this award, exempt pursuant to Rule 16b-3(e).
F3 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.
F4 The restricted stock units vest in four equal annual installments beginning the date shown above.