BlackRock Group’s Biogen BIIB Stock Holding History

BlackRock Group’s Portfolio BIIB Stock Details BIIB Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2016 Q4	$621M	Buy	2,191,369 +165,228	+8%	+$49M	0.3%	69
2016 Q3	$634M	Sell	2,026,141 -71,647	-3%	-$21.2M	0.32%	58
2016 Q2	$507M	Buy	2,097,788 +86,534	+4%	+$22.8M	0.26%	85
2016 Q1	$524M	Sell	2,011,254 -139,747	-6%	-$36.9M	0.28%	76
2015 Q4	$659M	Sell	2,151,001 -61,261	-3%	-$17.6M	0.36%	56
2015 Q3	$646M	Buy	2,212,262 +58,083	+3%	+$19.2M	0.38%	54
2015 Q2	$870M	Buy	2,154,179 +10,809	+0.5%	+$4.34M	0.47%	43
2015 Q1	$905M	Sell	2,143,370 -51,690	-2%	-$20.4M	0.49%	44
2014 Q4	$745M	Buy	2,195,060 +25,939	+1%	+$8.39M	0.4%	50
2014 Q3	$718M	Sell	2,169,121 -2,868	-0.1%	-$946K	0.42%	49
2014 Q2	$685M	Sell	2,171,989 -10,683	-0.5%	-$3.22M	0.39%	55
2014 Q1	$668M	Buy	2,182,672 +309,642	+17%	+$98.3M	0.42%	49
2013 Q4	$524M	Sell	1,873,030 -21,899	-1%	-$5.66M	0.34%	64
2013 Q3	$456M	Buy	1,894,929 +156,294	+9%	+$35M	0.31%	71
2013 Q2	$374M	Buy	+1,738,635	New	+$372M	0.28%	77

Other funds holding BIIB

Primecap Management

Primecap Management Pasadena, California $127B AUM 44.11% 1-Year Est. Return

Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

ClearBridge Investments

ClearBridge Investments New York $115B AUM 24.78% 1-Year Est. Return

T. Rowe Price Associates

T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return

Fidelity Investments

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

BlackRock Institutional Trust San Francisco, California $675B AUM 16.07% 1-Year Est. Return

Wellington Management Group

Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return

BlackRock Fund Advisors San Francisco, California $542B AUM 18.13% 1-Year Est. Return

Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return