PTC THERAPEUTICS INC

CUSIP: 69366j200 Class: COM

Zuckerman Investment Group, LLC's Holding History (CIK: 0001423296)

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

Q1 2018
Shares 73,683 Value ($000) $1,994 Avg Close — Range —
Q4 2017
Shares 73,683 Value ($000) $1,229 Avg Close — Range —