DRW Securities’s Biogen BIIB Stock Holding History

DRW Securities’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	–	Sell	-1,335	Closed	-$244K	–	1000
2026 Q1	$244K	Sell	1,335 -620	-32%	-$114K	﹤0.01%	1002
2025 Q4	$338K	Buy	+1,955	New	+$319K	0.01%	615
2025 Q3	–	Sell	-2,578	Closed	-$321K	–	1304
2025 Q2	$321K	Buy	+2,578	New	+$321K	0.01%	699
2024 Q2	–	Sell	-961	Closed	-$207K	–	530
2024 Q1	$207K	Buy	+961	New	+$225K	0.01%	333
2021 Q3	–	Sell	-730	Closed	-$253K	–	260
2021 Q2	$253K	Sell	730 -41	-5%	-$12.4K	0.01%	247
2021 Q1	$216K	Buy	+771	New	+$208K	0.01%	168
2020 Q2	–	Sell	-1,130	Closed	-$350K	–	178
2020 Q1	$350K	Buy	+1,130	New	+$343K	0.01%	192
2018 Q1	–	Sell	-2,952	Closed	-$940K	–	209
2017 Q4	$940K	Buy	+2,952	New	+$947K	0.1%	127
2015 Q4	–	Sell	-3,000	Closed	-$875K	–	78
2015 Q3	$875K	Buy	+3,000	New	+$991K	0.1%	33
2015 Q1	–	Sell	-7,800	Closed	-$2.65M	–	108
2014 Q4	$2.65M	Buy	+7,800	New	+$2.52M	0.3%	31
2014 Q3	–	Sell	-31,700	Closed	-$9.99M	–	93
2014 Q2	$9.99M	Buy	+31,700	New	+$9.54M	1.83%	11

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

DRW Securities's BIIB Position: Q2 2026 in Review

DRW Securities sold out of Biogen (BIIB) in Q2 2026, closing a stake of 1,335 shares — an estimated $244K sold.

DRW Securities first reported a position in BIIB in Q2 2014 and held it in 11 quarters. The position peaked at $9.99M in Q2 2014. 1,036 funds tracked by Wall St. Rank hold BIIB as of Q2 2026.

DRW Securities reported no remaining Biogen position as of Q2 2026 after selling out during the quarter.
DRW Securities sold 1,335 Biogen shares in Q2 2026, an estimated $244K.
DRW Securities first reported a position in Biogen in Q2 2014 and held it in 11 quarters.
DRW Securities's Biogen position peaked at $9.99M in Q2 2014.
1,036 funds tracked by Wall St. Rank held Biogen as of Q2 2026.

Based on DRW Securities's 13F filing for Q2 2026, filed 14 Aug 2026.