Wilmington Savings Fund Society’s Biogen BIIB Stock Holding History

Wilmington Savings Fund Society’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	$192K	Buy	889 +22	+3%	+$4.21K	﹤0.01%	593
2026 Q1	$159K	Hold	867	–	–	﹤0.01%	640
2025 Q4	$153K	Hold	867	–	–	﹤0.01%	653
2025 Q3	$121K	Sell	867 -1,068	-55%	-$144K	﹤0.01%	697
2025 Q2	$243K	Buy	1,935 +1,129	+140%	+$141K	﹤0.01%	762
2025 Q1	$110K	Buy	806 +64	+9%	+$9.15K	﹤0.01%	972
2024 Q4	$113K	Sell	742 -31	-4%	-$5.23K	﹤0.01%	1009
2024 Q3	$150K	Buy	+773	New	+$162K	﹤0.01%	899
2021 Q2	–	Sell	-2,612	Closed	-$731K	–	394
2021 Q1	$731K	Sell	2,612 -21	-0.8%	-$5.66K	0.03%	245
2020 Q4	$645K	Sell	2,633 -911	-26%	-$235K	0.03%	252
2020 Q3	$1M	Hold	3,544	–	–	0.05%	215
2020 Q2	$948K	Sell	3,544 -20	-0.6%	-$6.01K	0.05%	218
2020 Q1	$1.13M	Buy	+3,564	New	+$1.08M	0.07%	187
2019 Q1	–	Sell	-669	Closed	-$201K	–	349
2018 Q4	$201K	Buy	669 +45	+7%	+$14.4K	0.01%	324
2018 Q3	$220K	Buy	+624	New	+$215K	0.01%	334

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

Wilmington Savings Fund Society's BIIB Position: Q2 2026 in Review

Wilmington Savings Fund Society increased its Biogen (BIIB) stake by 2.5% in Q2 2026, buying an estimated $4.21K and bringing the position to 889 shares worth $192K. The position accounts for ﹤0.01% of the portfolio, ranked #593.

Wilmington Savings Fund Society first reported a position in BIIB in Q3 2018 and has held it in 15 quarters since. The position peaked at $1.13M in Q1 2020. 1,038 funds tracked by Wall St. Rank hold BIIB as of Q2 2026.

Wilmington Savings Fund Society held 889 shares of Biogen worth $192K as of Q2 2026.
Wilmington Savings Fund Society bought 22 Biogen shares in Q2 2026, an estimated $4.21K.
Biogen made up ﹤0.01% of Wilmington Savings Fund Society's portfolio in Q2 2026, its #593 holding.
Wilmington Savings Fund Society first reported a position in Biogen in Q3 2018 and has held it in 15 quarters since.
Wilmington Savings Fund Society's Biogen position peaked at $1.13M in Q1 2020.
1,038 funds tracked by Wall St. Rank held Biogen as of Q2 2026.

Based on Wilmington Savings Fund Society's 13F filing for Q2 2026, filed 28 Jul 2026.