WAHLUND TODD R (Chief Financial Officer) exercised options at OTTER TAIL CORP

Option exercise — a mechanical event triggered by vesting or expiry. Not a discretionary conviction trade.

M · 1 exercise

WAHLUND TODD R

Filed: 4/9/2025ACC: 0001466593-25-000056

InsiderWAHLUND TODD RCIK 2002077

→

IssuerOTTER TAIL CORPCIK 1466593

Officer· Chief Financial Officer

Since Feb 2026

-308.00

Net shares

Net seller

$23.2K

Total sold

Open market trades

0B · 0S

Total transactions

600.00 acquired · 908.00 disposed

Non-Derivative Transactions2

Common Stock

Direct

M · Option Exercise

+600.00

Price / share

$75.39

Trade value

$45.23K

% of position

6.9%

4/8/2025

8.75K→9.35K

Common Stock

Direct

F · Tax Withholding

−308.00

Price / share

$75.39

Trade value

$23.22K

% of position

3.3%

4/8/2025

9.35K→9.04K

Total

Net shares

+292.00

Net value

$22.01K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	4/8/2025	M · Option Exercise	+600.00	$75.39	$45.23K	6.9%	8.75K	9.35K
Common Stock Direct	4/8/2025	F · Tax Withholding	−308.00	$75.39	$23.22K	3.3%	9.35K	9.04K
Total			+292.00		$22.01K

Derivative Transactions1

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Common Stock

600.00 shares

−600.00

Strike price

Held after

0.00

Exercisable

—

4/8/2025

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Restricted Stock Units Direct	Common Stock600.00 shares	4/8/2025	M · Option Exercise	−600.00		—	0.00

Non-Derivative Holdings (Post-Transaction)2

Common Stock

Indirect

Shares owned7.00

Common Stock

Indirect

Shares owned2.99K

Total

3K indirect3K

Security Title	Shares Owned	Ownership Type
Common Stock	7.00	Indirect
Common Stock	2.99K	Indirect
Total	3K	3K indirect

Derivative Holdings (Post-Transaction)4

Restricted Stock Units

Direct

Underlying security

Common Stock

Underlying shares

460.00

Shares owned

460.00

Exercise price

Expiration

—

Exercise window

—

Restricted Stock Units

Direct

Underlying security

Common Stock

Underlying shares

600.00

Shares owned

600.00

Exercise price

Expiration

—

Exercise window

—

Restricted Stock Units

Direct

Underlying security

Common Stock

Underlying shares

1.50K

Shares owned

1.50K

Exercise price

Expiration

—

Exercise window

—

Restricted Stock Units

Direct

Underlying security

Common Stock

Underlying shares

900.00

Shares owned

900.00

Exercise price

Expiration

—

Exercise window

—

Total

Underlying

3.46K

Owned

3.46K

Security	Underlying	Exercise Window	Expiration	Underlying Shares	Shares Owned
Restricted Stock Units Direct	Common Stock	—	—	460.00	460.00
Restricted Stock Units Direct	Common Stock	—	—	600.00	600.00
Restricted Stock Units Direct	Common Stock	—	—	1.50K	1.50K
Restricted Stock Units Direct	Common Stock	—	—	900.00	900.00
Total				3.46K	3.46K