BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

D.B. Root & Company, LLC's Holding History (CIK: 0001731717)

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

Q3 2018

Shares 897 Value ($000) $317 Avg Close $344.30 Range $288.13 - $388.67

Q2 2018

Shares 917 Value ($000) $266 Avg Close $281.15 Range $249.17 - $310.91

Q1 2018

Shares 1,707 Value ($000) $467 Avg Close $310.41 Range $259.76 - $370.57

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2018	897	$317	$344.30	$288.13 - $388.67
Q2 2018	917	$266	$281.15	$249.17 - $310.91
Q1 2018	1,707	$467	$310.41	$259.76 - $370.57