WHITING PETE CORP NEW

CUSIP: 966387102 Class: COM

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC's Holding History (CIK: 0001644956)

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

Q1 2017
Shares 33,029 Value ($000) $312 Avg Close — Range —
Q4 2016
Shares 33,345 Value ($000) $401 Avg Close — Range —
Q3 2016
Shares 35,669 Value ($000) $312 Avg Close — Range —
Q2 2016
Shares 35,743 Value ($000) $331 Avg Close — Range —
Q1 2016
Shares 13,655 Value ($000) $109 Avg Close — Range —
Q4 2015
Shares 15,673 Value ($000) $148 Avg Close — Range —
Q3 2015
Shares 28,277 Value ($000) $432 Avg Close — Range —