GEVO INC

CUSIP: 374396208 Class: COM

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

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

Q1 2016
Shares 35,996 Value ($000) $10 Avg Close — Range —
Q4 2015
Shares 32,498 Value ($000) $20 Avg Close — Range —