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Livermore
Livermore
ZHEN

Rafferty Asset Management, LLC

SEC CIK
0001389426
Latest filing
Aug 14, 2026

BIIB holding history

Biogen Inc. in every 13F filed by Rafferty Asset Management, LLC, including the quarters it was sold out or no filing was made. Changes compare share counts with the previous calendar quarter.

BIIB overviewAll 13F holders of BIIBFull Q2 2026 holdings

Shares (Q2 2026)
30,461
Value
$6.58M
% of portfolio
<0.1%
Quarters held
22
Since Q1 2021
Holdings of BIIB by Rafferty Asset Management, LLC, by quarter
QuarterSharesValue% of portfolioShare changeActionAll holders
Q2 202630,461$6.58M<0.1%−4,557−13.0%ReducedHolders
Q1 202635,018$6.42M<0.1%−13,541−27.9%ReducedHolders
Q4 202548,559$8.55M<0.1%−110,068−69.4%ReducedHolders
Q3 2025158,627$22.2M0.1%−21,813−12.1%ReducedHolders
Q2 2025180,440$22.7M0.1%−335−0.2%ReducedHolders
Q1 2025180,775$24.7M0.1%−8,745−4.6%ReducedHolders
Q4 2024189,520$29.0M0.1%+29,319+18.3%AddedHolders
Q3 2024160,201$31.1M0.1%+8,906+5.9%AddedHolders
Q2 2024151,295$35.1M0.1%+38,479+34.1%AddedHolders
Q1 2024112,816$24.3M0.1%+16,934+17.7%AddedHolders
Q4 202395,882$24.8M0.1%+13,335+16.2%AddedHolders
Q3 202382,547$21.2M0.1%+17,754+27.4%AddedHolders
Q2 202364,793$18.5M0.1%+5,628+9.5%AddedHolders
Q1 202359,165$16.4M0.1%+2,794+5.0%AddedHolders
Q4 202256,371$15.6M0.1%−16,459−22.6%ReducedHolders
Q3 202272,830$19.4M0.2%+17,895+32.6%AddedHolders
Q2 202254,935$11.2M0.1%−8,299−13.1%ReducedHolders
Q1 202263,234$13.3M0.1%+18,274+40.6%AddedHolders
Q4 202144,960$10.8M0.1%+15,793+54.1%AddedHolders
Q3 202129,167$8.25M0.1%+9,718+50.0%AddedHolders
Q2 202119,449$6.74M<0.1%−9,647−33.2%ReducedHolders
Q1 202129,096$8.14M0.1%––Holders

Livermore's 13F data starts with Q1 2021, so Q1 2021 has no change from the previous quarter.