PTC THERAPEUTICS INC

Ticker: PTCT CUSIP: 69366J200 Class: Common Stock

MACKAY SHIELDS LLC's Holding History (CIK: 0000061227)

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

Q1 2021

Shares 24,227 Value ($000) $1,147 Avg Close $59.38 Range $46.51 - $70.82

Q4 2020

Shares 39,110 Value ($000) $2,386 Avg Close $58.94 Range $46.86 - $68.81

Q3 2020

Shares 44,310 Value ($000) $2,072 Avg Close $49.23 Range $44.19 - $58.13

Q2 2020

Shares 46,610 Value ($000) $2,365 Avg Close $49.14 Range $40.03 - $55.00

Q1 2020

Shares 47,910 Value ($000) $2,137 Avg Close $50.35 Range $30.79 - $59.89

Q4 2019

Shares 46,210 Value ($000) $2,219 Avg Close $42.49 Range $31.49 - $50.96

Q3 2019

Shares 49,610 Value ($000) $1,678 Avg Close $43.52 Range $33.05 - $48.81

Q2 2019

Shares 48,310 Value ($000) $2,174 Avg Close $39.49 Range $34.51 - $45.00

Q1 2019

Shares 16,327 Value ($000) $614 Avg Close $33.58 Range $27.53 - $39.67

Q4 2018

Shares 16,127 Value ($000) $554 Avg Close $35.96 Range $28.91 - $48.99

Q3 2018

Shares 17,800 Value ($000) $837 Avg Close $41.38 Range $32.13 - $48.85

Q2 2018

Shares 18,300 Value ($000) $618 Avg Close $31.18 Range $24.60 - $52.95

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2021	24,227	$1,147	$59.38	$46.51 - $70.82
Q4 2020	39,110	$2,386	$58.94	$46.86 - $68.81
Q3 2020	44,310	$2,072	$49.23	$44.19 - $58.13
Q2 2020	46,610	$2,365	$49.14	$40.03 - $55.00
Q1 2020	47,910	$2,137	$50.35	$30.79 - $59.89
Q4 2019	46,210	$2,219	$42.49	$31.49 - $50.96
Q3 2019	49,610	$1,678	$43.52	$33.05 - $48.81
Q2 2019	48,310	$2,174	$39.49	$34.51 - $45.00
Q1 2019	16,327	$614	$33.58	$27.53 - $39.67
Q4 2018	16,127	$554	$35.96	$28.91 - $48.99
Q3 2018	17,800	$837	$41.38	$32.13 - $48.85
Q2 2018	18,300	$618	$31.18	$24.60 - $52.95