BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

COHEN & STEERS, INC.'s Holding History (CIK: 0001284812)

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

Q3 2018

Shares 26,628 Value ($000) $9,408 Avg Close $344.30 Range $288.13 - $388.67

Q2 2018

Shares 59,312 Value ($000) $17,215 Avg Close $281.15 Range $249.17 - $310.91

Q1 2018

Shares 61,580 Value ($000) $16,862 Avg Close $310.41 Range $259.76 - $370.57

Q4 2017

Shares 57,035 Value ($000) $18,170 Avg Close $320.80 Range $301.81 - $348.84

Q3 2017

Shares 38,695 Value ($000) $12,116 Avg Close $296.11 Range $269.50 - $330.00

Q1 2016

Shares 11,700 Value ($000) $3,046 Avg Close $264.15 Range $242.07 - $301.02

Q4 2015

Shares 24,900 Value ($000) $7,628 Avg Close $287.35 Range $254.00 - $311.65

Q3 2015

Shares 24,900 Value ($000) $7,266 Avg Close $330.23 Range $265.00 - $412.24

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2018	26,628	$9,408	$344.30	$288.13 - $388.67
Q2 2018	59,312	$17,215	$281.15	$249.17 - $310.91
Q1 2018	61,580	$16,862	$310.41	$259.76 - $370.57
Q4 2017	57,035	$18,170	$320.80	$301.81 - $348.84
Q3 2017	38,695	$12,116	$296.11	$269.50 - $330.00
Q1 2016	11,700	$3,046	$264.15	$242.07 - $301.02
Q4 2015	24,900	$7,628	$287.35	$254.00 - $311.65
Q3 2015	24,900	$7,266	$330.23	$265.00 - $412.24