OTTER TAIL CORP

Ticker: OTTR CUSIP: 689648103 Class: Common Stock

Spark Investment Management LLC's Holding History (CIK: 0001554871)

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

Q1 2015

Shares 6,800 Value ($000) $218 Avg Close $22.79 Range $21.77 - $24.03

Q1 2014

Shares 10,300 Value ($000) $317 Avg Close $20.25 Range $18.41 - $21.88

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2015	6,800	$218	$22.79	$21.77 - $24.03
Q1 2014	10,300	$317	$20.25	$18.41 - $21.88