OTTER TAIL CORP

Ticker: OTTR CUSIP: 689648103 Class: Common Stock

Grantham, Mayo, Van Otterloo & Co. LLC's Holding History (CIK: 0001352662)

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

Q1 2020

Shares 5,700 Value ($000) $253 Avg Close $42.27 Range $26.34 - $48.43

Q4 2019

Shares 18,200 Value ($000) $933 Avg Close $43.72 Range $40.72 - $48.47

Q3 2019

Shares 29,200 Value ($000) $1,570 Avg Close $43.78 Range $40.10 - $46.25

Q2 2019

Shares 12,900 Value ($000) $681 Avg Close $42.32 Range $40.14 - $44.48

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2020	5,700	$253	$42.27	$26.34 - $48.43
Q4 2019	18,200	$933	$43.72	$40.72 - $48.47
Q3 2019	29,200	$1,570	$43.78	$40.10 - $46.25
Q2 2019	12,900	$681	$42.32	$40.14 - $44.48