BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

Casdin Capital, LLC's Holding History (CIK: 0001534261)

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

Q1 2016
Shares 5,000 Value ($000) $1,302 Avg Close $264.15 Range $242.07 - $301.02
Q4 2015
Shares 9,000 Value ($000) $2,757 Avg Close $287.35 Range $254.00 - $311.65