ULTRAGENYX PHARMACEUTICAL IN

Ticker: RARE CUSIP: 90400D108 Class: EQTY

EcoR1 Capital, LLC's Holding History (CIK: 0001587114)

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

Q2 2020

Shares 519,119 Value ($000) $40,605 Avg Close $66.19 Range $42.32 - $79.67

Q1 2020

Shares 371,208 Value ($000) $16,493 Avg Close $51.92 Range $31.99 - $64.24

Q4 2019

Shares 261,554 Value ($000) $11,171 Avg Close $41.26 Range $35.41 - $46.06

Q3 2019

Shares 61,554 Value ($000) $2,633 Avg Close $54.32 Range $41.35 - $65.00

Q2 2019

Shares 497,899 Value ($000) $31,617 Avg Close $63.65 Range $54.41 - $74.50

Q1 2019

Shares 497,899 Value ($000) $34,534 Avg Close $57.14 Range $39.78 - $71.63

Q3 2018

Shares 254,000 Value ($000) $19,390 Avg Close $81.34 Range $69.73 - $90.98

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2020	519,119	$40,605	$66.19	$42.32 - $79.67
Q1 2020	371,208	$16,493	$51.92	$31.99 - $64.24
Q4 2019	261,554	$11,171	$41.26	$35.41 - $46.06
Q3 2019	61,554	$2,633	$54.32	$41.35 - $65.00
Q2 2019	497,899	$31,617	$63.65	$54.41 - $74.50
Q1 2019	497,899	$34,534	$57.14	$39.78 - $71.63
Q3 2018	254,000	$19,390	$81.34	$69.73 - $90.98