PTC THERAPEUTICS INC

Ticker: PTCT CUSIP: 69366J200 Class: Common Stock

Kerrisdale Advisers, LLC's Holding History (CIK: 0001569688)

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

Q2 2018

Shares 40,122 Value ($000) $1,353 Avg Close $31.18 Range $24.60 - $52.95

Q1 2018

Shares 35,565 Value ($000) $962 Avg Close $25.34 Range $16.38 - $33.22

Q4 2017

Shares 35,000 Value ($000) $584 Avg Close $16.93 Range $14.87 - $21.58

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2018	40,122	$1,353	$31.18	$24.60 - $52.95
Q1 2018	35,565	$962	$25.34	$16.38 - $33.22
Q4 2017	35,000	$584	$16.93	$14.87 - $21.58