William Blair Investment Management
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William Blair Investment Management’s Biogen BIIB Stock Holding History

William Blair 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
2019
Q1 		– Sell
-28,149
Closed -$8.47M – 409
2018
Q4 		$8.47M Sell
28,149
-39,469
-58% -$12.6M 0.04% 319
2018
Q3 		$23.9M Sell
67,618
-47,078
-41% -$16.2M 0.08% 211
2018
Q2 		$33.3M Sell
114,696
-3,502
-3% -$985K 0.12% 177
2018
Q1 		$32.4M Sell
118,198
-28,427
-19% -$8.82M 0.12% 174
2017
Q4 		$46.7M Sell
146,625
-4,711
-3% -$1.51M 0.18% 148
2017
Q3 		$47.4M Sell
151,336
-53,771
-26% -$15.9M 0.17% 151
2017
Q2 		$55.7M Sell
205,107
-87,940
-30% -$23.3M 0.2% 129
2017
Q1 		$80.1M Sell
293,047
-142,802
-33% -$40.4M 0.3% 105
2016
Q4 		$124M Buy
435,849
+4,118
+1% +$1.22M 0.49% 69
2016
Q3 		$135M Buy
431,731
+67,344
+18% +$19.9M 0.51% 65
2016
Q2 		$88.1M Sell
364,387
-7,059
-2% -$1.86M 0.35% 96
2016
Q1 		$96.7M Buy
371,446
+55,652
+18% +$14.7M 0.38% 90
2015
Q4 		$96.7M Buy
315,794
+73,617
+30% +$21.2M 0.39% 90
2015
Q3 		$70.7M Buy
+242,177
New +$80M 0.14% 215

Other funds holding BIIB

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $169B AUM 114.72% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.38T AUM 44.17% 1-Year Est. Return
ClearBridge Investments
ClearBridge Investments New York $121B AUM 27.52% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return
Capital World Investors
Capital World Investors Los Angeles, California $846B AUM 46.74% 1-Year Est. Return
AQR Capital Management
AQR Capital Management Greenwich, Connecticut $287B AUM 42.33% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

William Blair Investment Management's BIIB Position: Q1 2019 in Review

William Blair Investment Management sold out of Biogen (BIIB) in Q1 2019, closing a stake of 28,149 shares — an estimated $8.47M sold.

William Blair Investment Management first reported a position in BIIB in Q3 2015 and held it in 14 quarters. The position peaked at $135M in Q3 2016. 1,085 funds tracked by Wall St. Rank hold BIIB as of Q1 2019.

  • William Blair Investment Management reported no remaining Biogen position as of Q1 2019 after selling out during the quarter.
  • William Blair Investment Management sold 28,149 Biogen shares in Q1 2019, an estimated $8.47M.
  • William Blair Investment Management first reported a position in Biogen in Q3 2015 and held it in 14 quarters.
  • William Blair Investment Management's Biogen position peaked at $135M in Q3 2016.
  • 1,085 funds tracked by Wall St. Rank held Biogen as of Q1 2019.

Based on William Blair Investment Management's 13F filing for Q1 2019, filed 10 May 2019.