SINTANA ENERGY INC.

CUSIP: 82937H108 Class: FOR

Chesley Taft & Associates LLC's Holding History (CIK: 0001164632)

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

Q2 2015
Shares 65,000 Value ($000) $3 Avg Close — Range —
Q1 2015
Shares 95,000 Value ($000) $4 Avg Close — Range —
Q4 2014
Shares 95,000 Value ($000) $8 Avg Close — Range —
Q3 2014
Shares 95,000 Value ($000) $12 Avg Close — Range —