RUBIUS THERAPEUTICS INC

CUSIP: 78116T103 Class: COM

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

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

Q4 2019
Shares 525,877 Value ($000) $4,996 Avg Close — Range —
Q3 2019
Shares 260,152 Value ($000) $2,042 Avg Close — Range —
Q2 2019
Shares 463,152 Value ($000) $7,285 Avg Close — Range —
Q1 2019
Shares 646,228 Value ($000) $11,697 Avg Close — Range —
Q4 2018
Shares 592,128 Value ($000) $9,521 Avg Close — Range —
Q3 2018
Shares 592,128 Value ($000) $14,211 Avg Close — Range —