PROTEOSTASIS THERAPEUTICS IN

CUSIP: 74373B109 Class: COM

Rock Springs Capital Management LP's Holding History (CIK: 0001595725)

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

Q3 2019
Shares 400,000 Value ($000) $338 Avg Close — Range —
Q2 2019
Shares 400,000 Value ($000) $390 Avg Close — Range —
Q1 2019
Shares 400,000 Value ($000) $504 Avg Close — Range —
Q4 2018
Shares 400,000 Value ($000) $1,296 Avg Close — Range —
Q2 2018
Shares 471,321 Value ($000) $1,315 Avg Close — Range —
Q1 2018
Shares 675,000 Value ($000) $3,206 Avg Close — Range —
Q4 2017
Shares 675,000 Value ($000) $3,935 Avg Close — Range —
Q3 2017
Shares 450,000 Value ($000) $945 Avg Close — Range —
Q2 2017
Shares 450,000 Value ($000) $2,106 Avg Close — Range —
Q1 2017
Shares 450,000 Value ($000) $3,519 Avg Close — Range —
Q4 2016
Shares 450,000 Value ($000) $5,517 Avg Close — Range —
Q3 2016
Shares 450,000 Value ($000) $7,016 Avg Close — Range —
Q2 2016
Shares 415,000 Value ($000) $5,034 Avg Close — Range —
Q1 2016
Shares 470,000 Value ($000) $4,531 Avg Close — Range —