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Castleark Management’s Biogen BIIB Stock Holding History

Castleark 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
2020
Q2 		– Sell
-2,190
Closed -$693K – 347
2020
Q1 		$693K Buy
+2,190
New +$665K 0.04% 209
2019
Q1 		– Sell
-20,759
Closed -$6.25M – 365
2018
Q4 		$6.25M Sell
20,759
-17,306
-45% -$5.52M 0.27% 120
2018
Q3 		$13.4M Buy
38,065
+21,619
+131% +$7.44M 0.39% 87
2018
Q2 		$4.77M Sell
16,446
-140
-0.8% -$39.4K 0.15% 196
2018
Q1 		$4.54M Sell
16,586
-750
-4% -$233K 0.14% 194
2017
Q4 		$5.52M Sell
17,336
-24,488
-59% -$7.86M 0.17% 176
2017
Q3 		$13.1M Sell
41,824
-40,202
-49% -$11.9M 0.41% 78
2017
Q2 		$22.3M Sell
82,026
-38,820
-32% -$10.3M 0.73% 36
2017
Q1 		$33M Buy
120,846
+16,450
+16% +$4.65M 1.04% 19
2016
Q4 		$29.6M Sell
104,396
-11,984
-10% -$3.55M 0.94% 24
2016
Q3 		$36.4M Buy
116,380
+49,890
+75% +$14.8M 1.1% 24
2016
Q2 		$16.1M Buy
+66,490
New +$17.5M 0.51% 48
2015
Q4 		– Sell
-23,005
Closed -$6.71M – 391
2015
Q3 		$6.71M Sell
23,005
-48,125
-68% -$15.9M 0.22% 122
2015
Q2 		$28.7M Buy
+71,130
New +$28.5M 0.77% 31
2014
Q4 		– Sell
-134,770
Closed -$41.2M – 345
2014
Q3 		$41.2M Buy
+134,770
New +$44.4M 1.17% 27
2014
Q2 		– Sell
-134,770
Closed -$41.2M – 319
2014
Q1 		$41.2M Sell
134,770
-82,053
-38% -$26M 1.17% 27
2013
Q4 		$60.6M Buy
+216,823
New +$56.1M 1.76% 17

Other funds holding BIIB

Primecap Management
Primecap Management Pasadena, California $127B AUM 44.11% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return
ClearBridge Investments
ClearBridge Investments New York $115B AUM 24.78% 1-Year Est. Return
Renaissance Technologies
Renaissance Technologies New York $63.9B AUM 45.56% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Northern Trust
Northern Trust Chicago, Illinois $757B AUM 28.64% 1-Year Est. Return
Bank of New York Mellon
Bank of New York Mellon New York $544B AUM 28.31% 1-Year Est. Return

Castleark Management's BIIB Position: Q2 2020 in Review

Castleark Management sold out of Biogen (BIIB) in Q2 2020, closing a stake of 2,190 shares — an estimated $693K sold.

Castleark Management first reported a position in BIIB in Q4 2013 and held it in 17 quarters. The position peaked at $60.6M in Q4 2013. 1,060 funds tracked by Wall St. Rank hold BIIB as of Q2 2020.

  • Castleark Management reported no remaining Biogen position as of Q2 2020 after selling out during the quarter.
  • Castleark Management sold 2,190 Biogen shares in Q2 2020, an estimated $693K.
  • Castleark Management first reported a position in Biogen in Q4 2013 and held it in 17 quarters.
  • Castleark Management's Biogen position peaked at $60.6M in Q4 2013.
  • 1,060 funds tracked by Wall St. Rank held Biogen as of Q2 2020.

Based on Castleark Management's 13F filing for Q2 2020, filed 14 Aug 2020.