WESTERN GAS PARTNERS LP

CUSIP: 958254104 Class: COM

MASSACHUSETTS FINANCIAL SERVICES CO /MA/'s Holding History (CIK: 0000912938)

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

Q4 2016
Shares 431,274 Value ($000) $25,342 Avg Close — Range —
Q3 2016
Shares 7,700 Value ($000) $424 Avg Close — Range —