BlackRock Investment Management’s Biogen BIIB Stock Holding History

BlackRock Investment Management’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	$314M	Buy	1,107,758 +158,870	+17%	+$47.1M	0.36%	45
2016 Q3	$297M	Buy	948,888 +398,171	+72%	+$118M	0.37%	48
2016 Q2	$133M	Sell	550,717 -258,258	-32%	-$68.1M	0.17%	123
2016 Q1	$211M	Sell	808,975 -288,772	-26%	-$76.3M	0.27%	79
2015 Q4	$336M	Buy	1,097,747 +8,756	+0.8%	+$2.52M	0.43%	47
2015 Q3	$318M	Buy	1,088,991 +508,272	+88%	+$168M	0.43%	48
2015 Q2	$235M	Buy	580,719 +53,079	+10%	+$21.3M	0.29%	72
2015 Q1	$223M	Sell	527,640 -14,713	-3%	-$5.8M	0.29%	77
2014 Q4	$184M	Sell	542,353 -512,662	-49%	-$166M	0.24%	88
2014 Q3	$349M	Sell	1,055,015 -107,411	-9%	-$35.4M	0.49%	40
2014 Q2	$367M	Buy	1,162,426 +418,438	+56%	+$126M	0.49%	37
2014 Q1	$228M	Buy	743,988 +80,277	+12%	+$25.5M	0.33%	66
2013 Q4	$186M	Sell	663,711 -18,505	-3%	-$4.79M	0.28%	86
2013 Q3	$164M	Buy	682,216 +30,462	+5%	+$6.82M	0.27%	83
2013 Q2	$140M	Buy	+651,754	New	+$139M	0.25%	90

Other funds holding BIIB

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

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

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

BIT

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

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

BFA

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

BlackRock Investment Management's BIIB Position: Q4 2016 in Review

BlackRock Investment Management increased its Biogen (BIIB) stake by 17% in Q4 2016, buying an estimated $47.1M and bringing the position to 1,107,758 shares worth $314M. The position accounts for 0.36% of the portfolio, ranked #45.

BlackRock Investment Management first reported a position in BIIB in Q2 2013 and has held it in 15 quarters since. The position peaked at $367M in Q2 2014. 1,025 funds tracked by Wall St. Rank hold BIIB as of Q4 2016.

BlackRock Investment Management held 1,107,758 shares of Biogen worth $314M as of Q4 2016.
BlackRock Investment Management bought 158,870 Biogen shares in Q4 2016, an estimated $47.1M.
Biogen made up 0.36% of BlackRock Investment Management's portfolio in Q4 2016, its #45 holding.
BlackRock Investment Management first reported a position in Biogen in Q2 2013 and has held it in 15 quarters since.
BlackRock Investment Management's Biogen position peaked at $367M in Q2 2014.
1,025 funds tracked by Wall St. Rank held Biogen as of Q4 2016.

Based on BlackRock Investment Management's 13F filing for Q4 2016, filed 10 Feb 2017.