GEVO INC

CUSIP: 374396109 Class: CMN

GROUP ONE TRADING, L.P.'s Holding History (CIK: 0000932540)

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

Q1 2015
Shares 57,319 Value ($000) $12 Avg Close — Range —
Q4 2014
Shares 57,319 Value ($000) $18 Avg Close — Range —
Q3 2014
Shares 57,319 Value ($000) $20 Avg Close — Range —
Q2 2014
Shares 60,919 Value ($000) $52 Avg Close — Range —
Q1 2014
Shares 134,474 Value ($000) $157 Avg Close — Range —
Q4 2013
Shares 25,458 Value ($000) $36 Avg Close — Range —
Q3 2013
Shares 36,820 Value ($000) $71 Avg Close — Range —
Q2 2013
Shares 23,800 Value ($000) $48 Avg Close — Range —