Otter Tail Corp — Director's Dealing 2026

Feb 12, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Otter Tail Corp (OTTR)
CIK: 0001466593
Period of Report: 2026-02-10

Reporting Person: Wahlund Todd R (Chief Financial Officer)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2026-02-10	Restricted Stock Units	$	A	1400	Acquired		Common Stock (1400)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	10029	Direct
Common Stock	3048	Indirect
Common Stock	7	Indirect

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Restricted Stock Units	$		Common Stock (1125)	1125	Direct
Restricted Stock Units	$		Common Stock (600)	600	Direct
Restricted Stock Units	$		Common Stock (460)	460	Direct
Restricted Stock Units	$		Common Stock (600)	600	Direct

Footnotes

F1: Total direct holdings include shares acquired through the dividend reinvestment plan, the Employee Stock Purchase Plan, and shares acquired pursuant to restricted stock unit distributions.

F2: Each restricted stock unit represents a contingent right to receive one share of Otter Tail Corporation stock.

F3: The restricted stock units vest in four equal annual installments beginning the date shown above.

F4: Restricted stock units vest four years from date shown above.