BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

East Coast Asset Management, LLC.'s Holding History (CIK: 0001579254)

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

Q2 2013
Shares 44 Value ($000) $9 Avg Close $213.68 Range $191.80 - $242.64
Q1 2013
Shares 44 Value ($000) $8 Avg Close $161.63 Range $139.72 - $192.92
Q4 2012
Shares 44 Value ($000) $6 Avg Close — Range —