Otter Tail Corp — Director's Dealing 2024

Feb 8, 2024

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Otter Tail Corp (OTTR)
CIK: 0001466593
Period of Report: 2024-02-06

Reporting Person: KNUTSON PAUL L (VP, Human Resources)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2024-02-06	Common Stock	A	5100	$93.33	Acquired	26108	Direct
2024-02-06	Common Stock	F	2233	$93.33	Disposed	23875	Direct
2024-02-06	Common Stock	M	800	$93.33	Acquired	24675	Direct
2024-02-06	Common Stock	F	320	$93.33	Disposed	24355	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2024-02-06	Restricted Stock Units	$	A	600	Acquired		Common Stock (600)	Direct
2024-02-06	Restricted Stock Units	$	M	175	Disposed		Common Stock (0)	Direct
2024-02-06	Restricted Stock Units	$	M	250	Disposed		Common Stock (250)	Direct
2024-02-06	Restricted Stock Units	$	M	175	Disposed		Common Stock (350)	Direct
2024-02-06	Restricted Stock Units	$	M	200	Disposed		Common Stock (600)	Direct

Footnotes

F1: Represents shares received upon the vesting of certain performance criteria in connection with a Performance Share Award (granted in 2021).

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

F4: 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.

F5: The restricted stock units vest in four equal annual installments beginning the date shown above.