WESTERN GAS PARTNERS LP

CUSIP: 958254104 Class: COM

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

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

Q1 2016
Shares 20,365 Value ($000) $884 Avg Close — Range —
Q3 2015
Shares 9,500 Value ($000) $445 Avg Close — Range —
Q3 2014
Shares 239 Value ($000) $18 Avg Close — Range —