OASIS PETE INC NEW

CUSIP: 674215108 Class: COMMON STOCK

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

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

Q3 2017
Shares 2,164,852 Value ($000) $19,743 Avg Close — Range —
Q2 2017
Shares 1,579,190 Value ($000) $12,712 Avg Close — Range —
Q1 2017
Shares 1,300,521 Value ($000) $18,545 Avg Close — Range —