Rhythm Pharmaceuticals, Inc.

Historical 13F Holders

Symbol
RYTM
CUSIP
76243J105
All holders as of
Q2 2026
Type
Equity
Class
COM
Reported Value, Excluding Options
Total Filings

13D/G Filers

Investors who own more than 5% of a class must file a Schedule 13D or 13G. Each filer's latest filing for 76243J105 since 12/18/2024, largest first.

Filer % of Class Filed
RA Capital Management, L.P. 13G/A
9.9% 2/17/2026
Event 12/31/2025
Baker Bros. Advisors LP 13G/A
8.9% 5/15/2025
Event 3/31/2025
BlackRock, Inc. 13G/A 6.9% 4/24/2025
Event 3/31/2025
Primecap Management Co/CA/ 13G/A 5.2% 2/12/2026
Event 12/31/2025
Perceptive Advisors LLC 13G/A
5.1% 5/15/2026
Event 3/31/2026
Vanguard Capital Management LLC 13G 5.0% 4/30/2026
Event 3/31/2026
Under 5%, checked the "5 percent or less" box, or amended by a later filing (2)
Goldman Sachs Group Inc 13G/A
3.0% 2/10/2025
Event 12/31/2024
Vanguard Group Inc 13G/A 0% 3/27/2026
Event 3/13/2026

13F Holders by Quarter

Period Filings Shares, Excl. Options Value, Excl. Options
2026 Q3 6 11.0 k $1.05 M
2026 Q2 317 84.5 M $8.64 B
2026 Q1 295 73.6 M $6.42 B
2025 Q4 289 72.9 M $7.80 B
2025 Q3 279 489 M $7.32 B
2025 Q2 244 66.8 M $4.22 B
2025 Q1 244 64.9 M $3.44 B
2024 Q4 216 64.9 M $3.63 B
2024 Q3 195 67.8 M $3.55 B
2024 Q2 182 70.0 M $2.87 B
2024 Q1 186 68.7 M $2.98 B
2023 Q4 187 72.3 M $3.33 B
2023 Q3 157 68.4 M $1.57 B
2023 Q2 121 66.2 M $1.09 B
2023 Q1 138 60.4 M $1.08 B
2022 Q4 127 65.6 M $1.91 B
2022 Q3 116 61.1 M $1.49 B
2022 Q2 95 45.9 M $191 M
2022 Q1 117 48.9 M $563 M
2021 Q4 103 48.6 M $485 M
2021 Q3 100 48.0 M $626 M
2021 Q2 110 47.5 M $906 M
2021 Q1 135 47.6 M $1.01 B
2020 Q4 134 40.9 M $1.21 B
2020 Q3 126 39.2 M $851 M
2020 Q2 93 41.2 M $920 M
2020 Q1 83 40.8 M $621 M
2019 Q4 92 42.8 M $982 M
2019 Q3 87 34.3 M $741 M
2019 Q2 87 31.3 M $689 M
2019 Q1 91 30.9 M $847 M
2018 Q4 76 31.9 M $857 M
2018 Q3 82 31.3 M $912 M
2018 Q2 88 31.1 M $972 M
2018 Q1 56 24.4 M $485 M
2017 Q4 66 24.5 M $672 M