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Livermore
Livermore
ZHEN

Mariner, LLC

SEC CIK
0001373442
Latest filing
Aug 13, 2026

BIIB holding history

Biogen Inc. in every 13F filed by Mariner, 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)
87,374
Value
$18.9M
% of portfolio
<0.1%
Quarters held
22
Since Q1 2021
Holdings of BIIB by Mariner, LLC, by quarter
QuarterSharesValue% of portfolioShare changeActionAll holders
Q2 202687,374$18.9M<0.1%+15,338+21.3%AddedHolders
Q1 202672,036$13.2M<0.1%+19,561+37.3%AddedHolders
Q4 202552,475$9.24M<0.1%+4,961+10.4%AddedHolders
Q3 202547,514$6.66M<0.1%+11,599+32.3%AddedHolders
Q2 202535,915$4.51M<0.1%+11,910+49.6%AddedHolders
Q1 202524,005$3.29M<0.1%+5,039+26.6%AddedHolders
Q4 202418,966$2.90M<0.1%−1,001−5.0%ReducedHolders
Q3 202419,967$3.87M<0.1%−3,147−13.6%ReducedHolders
Q2 202423,114$5.36M<0.1%+2,038+9.7%AddedHolders
Q1 202421,076$4.54M<0.1%−453−2.1%ReducedHolders
Q4 202321,529$5.57M<0.1%+1,868+9.5%AddedHolders
Q3 202319,661$5.05M<0.1%−282−1.4%ReducedHolders
Q2 202319,943$5.68M<0.1%+1,921+10.7%AddedHolders
Q1 202318,022$5.01M<0.1%−1,891−9.5%ReducedHolders
Q4 202219,913$5.51M<0.1%+525+2.7%AddedHolders
Q3 202219,388$5.18M<0.1%+4,671+31.7%AddedHolders
Q2 202214,717$3.00M<0.1%+245+1.7%AddedHolders
Q1 202214,472$3.05M<0.1%+1,635+12.7%AddedHolders
Q4 202112,837$3.08M<0.1%−696−5.1%ReducedHolders
Q3 202113,533$3.83M<0.1%+2,074+18.1%AddedHolders
Q2 202111,459$3.97M<0.1%−452−3.8%ReducedHolders
Q1 202111,911$3.33M<0.1%––Holders

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