GREAT PLAINS ENERGY INC

CUSIP: 391164100 Class: COM

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

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

Q1 2018
Shares 2,932 Value ($000) $93 Avg Close — Range —
Q4 2017
Shares 9,865 Value ($000) $318 Avg Close — Range —
Q2 2016
Shares 3,700 Value ($000) $112 Avg Close — Range —
Q3 2014
Shares 760 Value ($000) $18 Avg Close — Range —
Q2 2014
Shares 760 Value ($000) $20 Avg Close — Range —
Q3 2013
Shares 200 Value ($000) $4 Avg Close — Range —
Q2 2013
Shares 100 Value ($000) $2 Avg Close — Range —