QUESTAR CORP

CUSIP: 748356102 Class: COM

Robeco Schweiz AG's Holding History (CIK: 0001418427)

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

Q3 2015
Shares 26,000 Value ($000) $495 Avg Close — Range —
Q2 2015
Shares 135,000 Value ($000) $2,847 Avg Close — Range —
Q1 2015
Shares 224,000 Value ($000) $5,331 Avg Close — Range —
Q4 2014
Shares 244,000 Value ($000) $6,281 Avg Close — Range —