SIERRA ONCOLOGY INC

CUSIP: 82640U107 Class: COMMON

PERCEPTIVE ADVISORS LLC's Holding History (CIK: 0001224962)

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

Q4 2019
Shares 2,666,190 Value ($000) $910 Avg Close — Range —
Q3 2019
Shares 2,666,190 Value ($000) $1,041 Avg Close — Range —
Q2 2019
Shares 2,666,190 Value ($000) $1,493 Avg Close — Range —
Q1 2019
Shares 2,666,190 Value ($000) $4,559 Avg Close — Range —
Q4 2018
Shares 2,666,190 Value ($000) $3,413 Avg Close — Range —
Q3 2018
Shares 3,200,000 Value ($000) $5,440 Avg Close — Range —
Q2 2018
Shares 4,500,000 Value ($000) $13,320 Avg Close — Range —
Q1 2018
Shares 5,000,000 Value ($000) $10,350 Avg Close — Range —
Q4 2017
Shares 5,000,000 Value ($000) $18,650 Avg Close — Range —
Q3 2017
Shares 3,655,186 Value ($000) $5,666 Avg Close — Range —
Q2 2017
Shares 3,655,186 Value ($000) $4,277 Avg Close — Range —
Q1 2017
Shares 3,703,704 Value ($000) $5,667 Avg Close — Range —