PTC THERAPEUTICS INC

Ticker: PTCT CUSIP: 69366J200 Class: Common Stock

Board of Trustees of The Leland Stanford Junior University's Holding History (CIK: 0001315828)

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

Q4 2014

Shares 10,295 Value ($000) $533 Avg Close $44.02 Range $33.02 - $57.50

Q3 2014

Shares 10,295 Value ($000) $453 Avg Close $31.28 Range $22.70 - $47.20

Q2 2014

Shares 10,295 Value ($000) $269 Avg Close $21.40 Range $14.51 - $28.75

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2014	10,295	$533	$44.02	$33.02 - $57.50
Q3 2014	10,295	$453	$31.28	$22.70 - $47.20
Q2 2014	10,295	$269	$21.40	$14.51 - $28.75