GEVO INC

CUSIP: 374396109 Class: CMN

STATE OF MICHIGAN RETIREMENT SYSTEM's Holding History (CIK: 0000762152)

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

Q1 2015
Shares 6,472,222 Value ($000) $1,301 Avg Close — Range —
Q4 2014
Shares 4,822,222 Value ($000) $1,543 Avg Close — Range —
Q3 2014
Shares 4,822,222 Value ($000) $1,652 Avg Close — Range —
Q2 2014
Shares 3,072,222 Value ($000) $2,642 Avg Close — Range —
Q1 2014
Shares 2,872,222 Value ($000) $3,360 Avg Close — Range —
Q4 2013
Shares 2,872,222 Value ($000) $4,107 Avg Close — Range —
Q3 2013
Shares 150,000 Value ($000) $288 Avg Close — Range —