OTTER TAIL CORP

Ticker: OTTR CUSIP: 689648103 Class: Common Stock

Costello Asset Management, INC's Holding History (CIK: 0001760145)

Note: Option positions (PUT/CALL) are excluded.

Q4 2025

Shares 718 Value ($000) $58 Avg Close $80.23 Range $73.20 - $85.91

Q3 2025

Shares 723 Value ($000) $59 Avg Close $79.81 Range $73.77 - $85.12

Q2 2025

Shares 722 Value ($000) $56 Avg Close $76.31 Range $69.94 - $79.78

Q1 2025

Shares 822 Value ($000) $66 Avg Close $76.90 Range $69.36 - $83.20

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	718	$58	$80.23	$73.20 - $85.91
Q3 2025	723	$59	$79.81	$73.77 - $85.12
Q2 2025	722	$56	$76.31	$69.94 - $79.78
Q1 2025	822	$66	$76.90	$69.36 - $83.20