MCM
BIIB icon

Mainstay Capital Management’s Biogen BIIB Stock Holding History

Mainstay Capital 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
2021
Q3 		– Sell
-3,615
Closed -$1.25M – 102
2021
Q2 		$1.25M Sell
3,615
-160
-4% -$48.5K 0.29% 54
2021
Q1 		$1.06M Sell
3,775
-247
-6% -$66.6K 0.33% 59
2020
Q4 		$985K Buy
4,022
+70
+2% +$18.1K 0.29% 58
2020
Q3 		$1.12M Sell
3,952
-293
-7% -$81.7K 0.29% 53
2020
Q2 		$1.14M Buy
4,245
+34
+0.8% +$10.2K 0.33% 57
2020
Q1 		$1.27M Sell
4,211
-416
-9% -$126K 0.41% 31
2019
Q4 		$1.37M Sell
4,627
-130
-3% -$36.1K 0.32% 53
2019
Q3 		$1.11M Buy
4,757
+362
+8% +$84.3K 0.61% 49
2019
Q2 		$1.03M Buy
4,395
+978
+29% +$226K 0.54% 52
2019
Q1 		$807K Sell
3,417
-470
-12% -$148K 0.62% 54
2018
Q4 		$1.16M Buy
3,887
+194
+5% +$61.9K 0.84% 34
2018
Q3 		$1.3M Buy
3,693
+550
+17% +$189K 0.83% 35
2018
Q2 		$912K Buy
3,143
+50
+2% +$14.1K 0.72% 44
2018
Q1 		$846K Buy
3,093
+654
+27% +$203K 0.64% 48
2017
Q4 		$777K Buy
+2,439
New +$782K 0.64% 45

Other funds holding BIIB

Primecap Management
Primecap Management Pasadena, California $169B AUM 114.72% 1-Year Est. Return
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
State Street
State Street Boston, Massachusetts $3.38T AUM 44.17% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return
ClearBridge Investments
ClearBridge Investments New York $121B AUM 27.52% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return
Northern Trust
Northern Trust Chicago, Illinois $860B AUM 41.15% 1-Year Est. Return

Mainstay Capital Management's BIIB Position: Q3 2021 in Review

Mainstay Capital Management sold out of Biogen (BIIB) in Q3 2021, closing a stake of 3,615 shares — an estimated $1.25M sold.

Mainstay Capital Management first reported a position in BIIB in Q4 2017 and held it in 15 quarters. The position peaked at $1.37M in Q4 2019. 1,041 funds tracked by Wall St. Rank hold BIIB as of Q3 2021.

  • Mainstay Capital Management reported no remaining Biogen position as of Q3 2021 after selling out during the quarter.
  • Mainstay Capital Management sold 3,615 Biogen shares in Q3 2021, an estimated $1.25M.
  • Mainstay Capital Management first reported a position in Biogen in Q4 2017 and held it in 15 quarters.
  • Mainstay Capital Management's Biogen position peaked at $1.37M in Q4 2019.
  • 1,041 funds tracked by Wall St. Rank held Biogen as of Q3 2021.

Based on Mainstay Capital Management's 13F filing for Q3 2021, filed 12 Nov 2021.