13F

BIIB BIOGEN INC

2026Q1 · CUSIP 09062X103

🟡 Cooling · Breadth rolling over
Holders
997
Δ holders QoQ
+1
Breadth percentile
Top 58%
Whale holders
288
Δ whales
-8
Inst. holding value
$24.2B
New positions
135
Closed positions
134
Price momentum (1Q)
-1.9%
Put / Call
24/23

Breadth history (34 quarters)

2018Q1: Δ-13 · h=1065 2018Q2: Δ-8 · h=1057 2018Q3: Δ+54 · h=1111 2018Q4: Δ-6 · h=1105 2019Q1: Δ-51 · h=1054 2019Q2: Δ-71 · h=983 2019Q3: Δ-14 · h=969 2019Q4: Δ+102 · h=1071 2020Q1: Δ+1 · h=1072 2020Q2: Δ-38 · h=1034 2020Q3: Δ-7 · h=1027 2020Q4: Δ+16 · h=1043 2021Q1: Δ+28 · h=1071 2021Q2: Δ+17 · h=1088 2021Q3: Δ-59 · h=1029 2021Q4: Δ-26 · h=1003 2022Q1: Δ-55 · h=948 2022Q2: Δ-30 · h=918 2022Q3: Δ+57 · h=975 2022Q4: Δ+44 · h=1019 2023Q1: Δ-25 · h=994 2023Q2: Δ+1 · h=995 2023Q3: Δ-45 · h=950 2023Q4: Δ+42 · h=992 2024Q1: Δ-48 · h=944 2024Q2: Δ-4 · h=940 2024Q3: Δ-25 · h=915 2024Q4: Δ-41 · h=874 2025Q1: Δ+1 · h=875 2025Q2: Δ-14 · h=861 2025Q3: Δ+43 · h=904 2025Q4: Δ+92 · h=996 2026Q1: Δ+1 · h=997 2018Q1: holders=1065 2018Q2: holders=1057 2018Q3: holders=1111 2018Q4: holders=1105 2019Q1: holders=1054 2019Q2: holders=983 2019Q3: holders=969 2019Q4: holders=1071 2020Q1: holders=1072 2020Q2: holders=1034 2020Q3: holders=1027 2020Q4: holders=1043 2021Q1: holders=1071 2021Q2: holders=1088 2021Q3: holders=1029 2021Q4: holders=1003 2022Q1: holders=948 2022Q2: holders=918 2022Q3: holders=975 2022Q4: holders=1019 2023Q1: holders=994 2023Q2: holders=995 2023Q3: holders=950 2023Q4: holders=992 2024Q1: holders=944 2024Q2: holders=940 2024Q3: holders=915 2024Q4: holders=874 2025Q1: holders=875 2025Q2: holders=861 2025Q3: holders=904 2025Q4: holders=996 2026Q1: holders=997 -102 -51 +0 +51 +102 7749711167 18Q119Q120Q121Q122Q123Q124Q125Q126Q1 Δ holders (bar) Holders (line)

Past Lit Events & Aftermath 9 lit events

Period Percentile Next-1Q return Next-2Q return
2025Q4 Top 4% -1.9%
2025Q3 Top 6% +16.6% +14.0%
2023Q4 Top 12% +5.2% -5.9%
2022Q4 Top 8% +12.5% -3.8%
2022Q3 Top 1% -7.2% +2.8%
2021Q2 Top 17% -21.3% -37.7%
2021Q1 Top 12% +22.5% -3.6%
2019Q4 Top 3% -6.3% -14.2%
2018Q3 Top 1% -0.9% -27.5%
Put holders / Call holders: 24 / 23