GAMCO Investors’s Biogen BIIB Stock Holding History

GAMCO Investors’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
2018 Q1	–	Sell	-1,650	Closed	-$526K	–	837
2017 Q4	$526K	Sell	1,650 -25	-1%	-$8.02K	﹤0.01%	675
2017 Q3	$524K	Sell	1,675 -75	-4%	-$22.2K	﹤0.01%	678
2017 Q2	$475K	Sell	1,750 -22	-1%	-$5.82K	﹤0.01%	697
2017 Q1	$485K	Sell	1,772 -100	-5%	-$28.3K	﹤0.01%	686
2016 Q4	$531K	Sell	1,872 -25	-1%	-$7.41K	﹤0.01%	667
2016 Q3	$594K	Sell	1,897 -2,900	-60%	-$859K	﹤0.01%	648
2016 Q2	$1.16M	Sell	4,797 -13	-0.3%	-$3.43K	0.01%	577
2016 Q1	$1.25M	Buy	4,810 +5	+0.1%	+$1.32K	0.01%	562
2015 Q4	$1.47M	Buy	4,805 +8	+0.2%	+$2.3K	0.01%	539
2015 Q3	$1.4M	Hold	4,797	–	–	0.01%	561
2015 Q2	$1.94M	Sell	4,797 -135	-3%	-$54.2K	0.01%	534
2015 Q1	$2.08M	Sell	4,932 -3	-0.1%	-$1.18K	0.01%	533
2014 Q4	$1.68M	Buy	4,935 +300	+6%	+$97.1K	0.01%	561
2014 Q3	$1.53M	Buy	4,635 +460	+11%	+$152K	0.01%	590
2014 Q2	$1.32M	Buy	4,175 +590	+16%	+$178K	0.01%	606
2014 Q1	$1.1M	Sell	3,585 -125	-3%	-$39.7K	0.01%	606
2013 Q4	$1.04M	Buy	3,710 +400	+12%	+$103K	0.01%	609
2013 Q3	$797K	Buy	3,310 +1,490	+82%	+$333K	﹤0.01%	643
2013 Q2	$392K	Buy	+1,820	New	+$389K	﹤0.01%	695

Other funds holding BIIB

BlackRock New York $5.7T AUM 30.48% 1-Year Est. Return

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

Primecap Management

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

ClearBridge Investments

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

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

Fidelity Investments

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

Wellington Management Group

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

AllianceBernstein

AllianceBernstein Nashville, Tennessee $309B AUM 23.92% 1-Year Est. Return

T. Rowe Price Associates

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

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