BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

YHB Investment Advisors, Inc.'s Holding History (CIK: 0001469219)

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

Q4 2018

Shares 772 Value ($000) $232 Avg Close $319.14 Range $278.46 - $358.41

Q3 2018

Shares 817 Value ($000) $289 Avg Close $344.30 Range $288.13 - $388.67

Q2 2018

Shares 822 Value ($000) $239 Avg Close $281.15 Range $249.17 - $310.91

Q1 2018

Shares 872 Value ($000) $239 Avg Close $310.41 Range $259.76 - $370.57

Q4 2017

Shares 827 Value ($000) $263 Avg Close $320.80 Range $301.81 - $348.84

Q3 2017

Shares 897 Value ($000) $281 Avg Close $296.11 Range $269.50 - $330.00

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2018	772	$232	$319.14	$278.46 - $358.41
Q3 2018	817	$289	$344.30	$288.13 - $388.67
Q2 2018	822	$239	$281.15	$249.17 - $310.91
Q1 2018	872	$239	$310.41	$259.76 - $370.57
Q4 2017	827	$263	$320.80	$301.81 - $348.84
Q3 2017	897	$281	$296.11	$269.50 - $330.00