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RYTM — RHYTHM PHARMACEUTICALS INC

Reported value held$3.44B
Funds holding (latest)42
SectorHealth Care
Funds holding (Q2 2026)37
Institutional value$2.59B · 25.89M sh
New / Add / Cut / Exit2 / 18 / 16 / 2
Top-5 / Top-10 concentration60.0% / 80.2%
Institutional holdings change Accumulating +13.6% (+3.09M sh)
Institutional value change Up +40.7%

As of Q2 2026, 37 SEC-registered investment managers reported holding RYTM (RHYTHM PHARMACEUTICALS INC) in their latest 13F filings, with a combined reported value of $2.59B across 25.89M shares. That is +13.6% by share count (+3.09M shares) versus the previous quarter, while reported value moved +40.7%. Ownership is concentrated: the five largest holders account for 60.0% of reported value and the top ten for 80.2%.

Compared with the prior quarter, 2 opened new positions, 18 added to existing stakes, 16 trimmed, 2 exited entirely. 13F holdings are quarter-end snapshots, so these moves reflect positioning as of Q2 2026, not real-time trading.

RYTM is classified in the Health Care sector.

All figures on this page are computed from SEC Form 13F quarterly filings. 13F filers disclose long positions of $100,000 or more within 45 days of quarter end; short positions, options overlays and intra-quarter trades are not included, so treat the numbers as a quarterly snapshot of institutional ownership rather than real-time positioning.

FundQuarterSharesValuePortfolio WeightChange
BlackRock Inc history Q2 2026 6.16M $683.60M 0.01% Reduce
Vanguard Group history Q4 2025 6.21M $664.82M 0.01% Add
JPMorgan Chase & Co history Q2 2026 2.65M $292.18M 0.03% New
Goldman Sachs Group history Q2 2026 2.13M $236.11M 0.02% Add
Geode Capital Management history Q2 2026 1.53M $170.32M 0.01% Add
Capital Research Global Investors history Q2 2026 1.53M $170.13M 0.03% Add
Citadel Advisors history Q2 2026 1.31M $145.36M 0.02% Reduce
Morgan Stanley history Q2 2026 1.11M $123.49M 0.01% Add
Fidelity Management & Research (FMR) history Q2 2026 1.03M $113.90M 0.01% Reduce
Alkeon Capital Management history Q3 2025 1.02M $102.78M 0.15% Hold
Janus Henderson Group history Q1 2026 918.15K $79.89M 0.04% Reduce
Norges Bank Investment Management history Q2 2026 685.84K $76.15M 0.01% Add
Franklin Resources history Q2 2026 577.03K $64.07M 0.01% Reduce
Charles Schwab Investment Management history Q2 2026 552.74K $61.37M 0.01% Add
Invesco Ltd history Q2 2026 543.27K $60.32M 0.01% Add
Northern Trust Corp history Q2 2026 540.33K $59.99M 0.01% Add
Wellington Management Group history Q2 2026 488.75K $54.27M 0.01% Add
Point72 Asset Management history Q2 2026 414.21K $45.99M 0.05% Reduce
BNY Mellon history Q2 2026 394.04K $43.75M 0.01% Add
Bank of America Corp history Q2 2026 325.47K $36.14M 0.00% Reduce

View all 42 fund holders →

New Positions (Q2 2026)

Fully Exited (vs previous quarter)

Fund Position History — shares by quarter (top 20 funds)

FundQ3 2021Q4 2021Q1 2022Q2 2022Q3 2022Q4 2022Q1 2023Q2 2023Q3 2023Q4 2023Q1 2024Q2 2024Q3 2024Q4 2024Q1 2025Q2 2025Q3 2025Q4 2025Q1 2026Q2 2026
BlackRock Inc — — — — — — — — — — — — 6.89M 6.95M 6.85M 6.27M 6.30M 6.30M 6.24M 6.16M
JPMorgan Chase & Co 22.50K 22.28K 26.98K 441 2.21K 19.64K 484 69.59K 72.41K 77.60K 54.50K 140.15K 81.59K 264.58K 143.64K 783.56K 1.19M 1.42M — 2.65M
Goldman Sachs Group 2.91M 3.10M 3.34M 3.16M 4.78M 5.20M 5.31M 5.19M 5.16M 5.05M 5.11M 5.29M 3.88M 1.81M 1.64M 1.73M 1.89M 1.83M 1.97M 2.13M
Geode Capital Management 667.66K 714.03K 740.89K 399.79K 388.11K 458.51K 472.76K 973.35K 1.05M 1.12M 1.18M 1.25M 1.26M 1.26M 1.29M 1.31M 1.36M 1.38M 1.42M 1.53M
Capital Research Global Investors — — — — — — — — — — — — — — — — 598.25K 985.09K 1.12M 1.53M
Citadel Advisors 12.70K 11.20K 445.22K 384.76K 262.63K 119.80K 417.94K 214.33K 279.83K 201.22K 92.10K 61.60K 162.28K 181.32K 108.37K 45.70K 186.83K 191.22K 1.45M 1.31M
Morgan Stanley 205.47K 268.36K 255.49K 430.75K 230.20K 243.69K 216.62K 103.18K 436.41K 231.66K 182.87K 475.65K 464.60K 560.09K 504.05K 524.48K 465.19K 651.40K 703.98K 1.11M
Fidelity Management & Research (FMR) 83.28K 546.32K 553.87K 556.99K 1.37M 773.03K 698.82K 701.53K 868.47K 529.13K 29.02K 27.99K 50.30K 113.11K 1.69M 1.95M 2.15M 1.71M 1.69M 1.03M
Norges Bank Investment Management — — — — — — — — — — — 43.24K — 205.65K — 207.39K — 66.21K — 685.84K
Franklin Resources 168.08K 1.54M 1.78M 1.78M — — — — — 5.88K 220.91K 232.68K 259.42K 268.20K 326.16K 543.80K 567.78K 695.74K 626.85K 577.03K
Charles Schwab Investment Management 266.36K 289.11K 298.32K 172.73K 204.27K 229.92K 228.04K 350.56K 384.75K 397.69K 406.75K 427.96K 433.87K 440.25K 445.43K 461.44K 527.92K 532.45K 526.46K 552.74K
Invesco Ltd 27.33K 24.25K 16.51K — — 334.27K — 28.28K 28.37K 135.73K 88.20K 276.70K 264.42K 302.85K 261.90K 68.92K 143.56K 291.15K 364.31K 543.27K
Northern Trust Corp 420.43K 429.07K 416.89K 111.25K 114.11K 138.10K 142.14K 494.20K 504.02K 501.09K 502.86K 499.45K 498.47K 545.31K 536.21K 510.25K 510.91K 488.22K 498.51K 540.33K
Wellington Management Group 845.95K 745.88K 85.81K 85.56K 153.21K 106.92K 111.63K 140.22K 137.44K 139.80K 193.52K 202.33K 27.72K 25.55K 23.56K 22.43K 24.48K 250.16K 273.76K 488.75K
Point72 Asset Management — — — — — — 11.96K — 4.15K — — — — — 63.84K 170.83K — 429.42K 846.80K 414.21K
BNY Mellon 156.42K 156.92K 152.35K 21.50K 39.91K 32.28K 26.73K 187.80K 177.38K 180.22K 167.84K 191.87K 148.93K 148.25K 146.59K 184.11K 182.37K 301.08K 293.30K 394.04K
Bank of America Corp 204.46K 122.64K 39.62K 49.11K 218.41K 266.15K 359.67K 140.12K 110.24K 69.87K 111.11K 92.04K 116.55K 110.99K 111.75K 222.15K 233.15K 224.48K 628.67K 325.47K
Millennium Management 256.92K 313.70K 360.59K 489.12K — 42.30K 626.91K — 104.17K 34.83K 10.00K — 36.98K 15.26K 232.38K 208.11K 158.66K 186.71K 451.82K 316.72K
Capital World Investors — — — — — — — — — — — — — — — — — 115.69K 115.69K 221.45K
UBS Group AG 80.97K 103.58K 500 7.51K 12.63K 191.26K 84.08K 87.85K 26.65K 85.95K 171.56K 65.94K 76.63K 254.26K 280.21K 252.58K 420.34K 427.24K 231.65K 144.38K

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