BAM
BIIB icon

Byrne Asset Management’s Biogen BIIB Stock Holding History

Byrne Asset 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
2026
Q1 		– Sell
-30
Closed -$5.28K – 573
2025
Q4 		$5.28K Sell
30
-8
-21% -$1.31K ﹤0.01% 478
2025
Q3 		$5.32K Buy
+38
New +$5.14K ﹤0.01% 471
2024
Q4 		– Sell
-10
Closed -$1.94K – 541
2024
Q3 		$1.94K Hold
10
– – ﹤0.01% 506
2024
Q2 		$2.29K Hold
10
– – ﹤0.01% 495
2024
Q1 		$2.16K Hold
10
– – ﹤0.01% 489
2023
Q4 		$2.62K Sell
10
-14
-58% -$3.44K ﹤0.01% 477
2023
Q3 		$6K Buy
24
+3
+14% +$802 0.01% 377
2023
Q2 		$6K Buy
+21
New +$6.25K ﹤0.01% 445

Other funds holding BIIB

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $127B AUM 44.11% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return

Byrne Asset Management's BIIB Position: Q1 2026 in Review

Byrne Asset Management sold out of Biogen (BIIB) in Q1 2026, closing a stake of 30 shares — an estimated $5.28K sold.

Byrne Asset Management first reported a position in BIIB in Q2 2023 and held it in 8 quarters. The position peaked at $6K in Q3 2023. 1,002 funds tracked by Wall St. Rank hold BIIB as of Q1 2026.

  • Byrne Asset Management reported no remaining Biogen position as of Q1 2026 after selling out during the quarter.
  • Byrne Asset Management sold 30 Biogen shares in Q1 2026, an estimated $5.28K.
  • Byrne Asset Management first reported a position in Biogen in Q2 2023 and held it in 8 quarters.
  • Byrne Asset Management's Biogen position peaked at $6K in Q3 2023.
  • 1,002 funds tracked by Wall St. Rank held Biogen as of Q1 2026.

Based on Byrne Asset Management's 13F filing for Q1 2026, filed 2 Apr 2026.