OTTER TAIL CORP

Ticker: OTTR CUSIP: 689648103 Class: Common Stock

Parallax Volatility Advisers, L.P.'s Holding History (CIK: 0001521001)

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

Q4 2018
Shares 1,900 Value ($000) $94 Avg Close $39.10 Range $36.10 - $42.66
Q4 2017
Shares 6,006 Value ($000) $267 Avg Close $36.46 Range $34.36 - $38.83
Q3 2017
Shares 15 Value ($000) $1 Avg Close $32.68 Range $30.48 - $35.27
Q2 2017
Shares 2,027 Value ($000) $80 Avg Close $30.80 Range $28.67 - $32.99
Q1 2017
Shares 1,526 Value ($000) $58 Avg Close $29.42 Range $27.80 - $31.55
Q4 2016
Shares 725 Value ($000) $30 Avg Close $28.65 Range $25.36 - $32.91
Q3 2016
Shares 476 Value ($000) $16 Avg Close $26.40 Range $24.99 - $27.92
Q4 2014
Shares 457 Value ($000) $14 Avg Close $20.92 Range $18.69 - $23.28
Q3 2014
Shares 689 Value ($000) $18 Avg Close $19.83 Range $18.79 - $21.21