M&G plc’s Biogen BIIB Stock Holding History

M&G plc’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 Q2	$1.86M	Hold	8,593	–	–	0.01%	299
2026 Q1	$1.57M	Hold	8,593	–	–	0.01%	317
2025 Q4	$1.51M	Hold	8,593	–	–	0.01%	313
2025 Q3	$1.2M	Hold	8,593	–	–	0.01%	325
2025 Q2	$1.08M	Sell	8,593 -64,119	-88%	-$7.99M	0.01%	332
2025 Q1	$9.96M	Buy	72,712 +3,873	+6%	+$554K	0.05%	198
2024 Q4	$10.5M	Buy	68,839 +60,246	+701%	+$10.2M	0.07%	197
2024 Q3	$1.67M	Hold	8,593	–	–	0.01%	325
2024 Q2	$1.99M	Hold	8,593	–	–	0.01%	312
2024 Q1	$1.86M	Buy	+8,593	New	+$2.01M	0.01%	333

Other funds holding BIIB

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Primecap Management Pasadena, California $169B AUM 114.72% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return

Norges Bank Oslo, Norway $1T AUM

Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return

M&G plc's BIIB Position: Q2 2026 in Review

M&G plc held its Biogen (BIIB) position steady in Q2 2026 at 8,593 shares worth $1.86M. The position accounts for 0.01% of the portfolio, ranked #299.

M&G plc first reported a position in BIIB in Q1 2024 and has held it in 10 quarters since. The position peaked at $10.5M in Q4 2024. 1,043 funds tracked by Wall St. Rank hold BIIB as of Q2 2026.

M&G plc held 8,593 shares of Biogen worth $1.86M as of Q2 2026.
M&G plc left its Biogen share count unchanged in Q2 2026.
Biogen made up 0.01% of M&G plc's portfolio in Q2 2026, its #299 holding.
M&G plc first reported a position in Biogen in Q1 2024 and has held it in 10 quarters since.
M&G plc's Biogen position peaked at $10.5M in Q4 2024.
1,043 funds tracked by Wall St. Rank held Biogen as of Q2 2026.

Based on M&G plc's 13F filing for Q2 2026, filed 6 Aug 2026.