PAUL L. KNUTSON - 10 Feb 2026 Form 4 Insider Report for Otter Tail Corp (OTTR)

Role
VP, Human Resources
Signature
/s/ Paul L. Knutson by James A. Versteeg, Attorney-in-Fact
Issuer symbol
OTTR
Transactions as of
10 Feb 2026
Net transactions value
+$173,551
Form type
4
Filing time
12 Feb 2026, 09:42:19 UTC
Previous filing
09 Feb 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
KNUTSON PAUL L VP, Human Resources 215 SOUTH CASCADE STREET, FERGUS FALLS /s/ Paul L. Knutson by James A. Versteeg, Attorney-in-Fact 12 Feb 2026 0001559334

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction OTTR Common Stock Award $311,148 +3,600 +16% $86.43 26,575 11 Feb 2026 Direct F1
transaction OTTR Common Stock Tax liability $137,597 -1,592 -6% $86.43 24,983 11 Feb 2026 Direct F2, F3

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 Award $0 +800 $0.000000 800 10 Feb 2026 Common Stock 800 Direct F4, F5
holding OTTR Restricted Stock Units 200 10 Feb 2026 Common Stock 200 Direct F4, F5
holding OTTR Restricted Stock Units 300 10 Feb 2026 Common Stock 300 Direct F4, F5
holding OTTR Restricted Stock Units 525 10 Feb 2026 Common Stock 525 Direct F4, F5
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Represents shares received upon the vesting of certain performance criteria in connection with a Performance Share Award (granted in 2023).
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 Each restricted stock unit represents a contingent right to receive one share of Otter Tail Corporation stock.
F5 The restricted stock units vest in four equal annual installments beginning the date shown above.