ZIOPHARM ONCOLOGY INC

CUSIP: 98973P101 Class: COMMON

Douglass Winthrop Advisors, LLC's Holding History (CIK: 0001308527)

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

Q4 2014
Shares 14,000 Value ($000) $71 Avg Close — Range —
Q3 2014
Shares 12,000 Value ($000) $32 Avg Close — Range —
Q2 2014
Shares 12,000 Value ($000) $48 Avg Close — Range —
Q1 2014
Shares 10,000 Value ($000) $46 Avg Close — Range —
Q4 2013
Shares 10,000 Value ($000) $43 Avg Close — Range —