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RYTM

Rhythm Pharmaceuticals, Inc.
$111.68 -2.49 (-2.18%) At close · Jul 6
Market Cap
$7.65B
Shares
68,532,607

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

The Jun 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out.
Holders: 286
Total Value: $6,149,987,878
Total Shares: 70,713,875
Showing 1–100 of 291 holdings by value · page 1 of 3

Institutional Ownership Trend

26 quarters

Superinvestors Holding RYTM

All superinvestors →
Joel Greenblatt $421,630

Holder Concentration

Across 286 13F filers
Top Holder
9.4%
Jun 2023 → Mar 2026 · range 9.1% – 85.8%
of institutional value
Top 5
35.2%
Jun 2023 → Mar 2026 · range 35.2% – 90.5%
of institutional value
Top 10
49.7%
Jun 2023 → Mar 2026 · range 49.7% – 93.2%
of institutional value
HHI
368
Jun 2023 → Mar 2026 · range 368 – 7,378
Broadly held
Showing 100 of 291
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Open
Mid RA CAPITAL MANAGEMENT, L.P. $579,814,813 9.43% 6,666,837
Mega BlackRock, Inc. $542,445,015 8.82% 6,237,151
Large BAKER BROS. ADVISORS LP $487,421,886 7.93% 5,604,483
Mega PRIMECAP MANAGEMENT CO/CA/ $297,220,757 4.83% 3,417,509
Mega VANGUARD CAPITAL MANAGEMENT LLC $258,111,740 4.20% 2,967,825
Mid PERCEPTIVE ADVISORS LLC $206,448,951 3.36% 2,373,795
Mega STATE STREET CORP $197,582,881 3.21% 2,271,851
Mega GOLDMAN SACHS GROUP INC $170,933,620 2.78% 1,965,432
Large WESTFIELD CAPITAL MANAGEMENT CO LP $167,775,827 2.73% 1,929,123
Mega FMR LLC $146,950,685 2.39% 1,689,671
Mega PRICE T ROWE ASSOCIATES INC /MD/ $143,924,565 2.34% 1,654,876
Large Polar Capital Holdings Plc $140,507,514 2.28% 1,615,586
Mega JPMORGAN CHASE & CO $135,120,415 2.20% 1,553,644
Mega CITADEL ADVISORS LLC $123,377,293 2.01% 1,418,619
Mega GEODE CAPITAL MANAGEMENT, LLC $123,172,914 2.00% 1,416,269
Large FEDERATED HERMES, INC. $111,869,771 1.82% 1,286,303
Small Checkpoint Capital L.P. $106,729,584 1.74% 1,227,200
Mega Capital Research Global Investors $97,011,556 1.58% 1,115,460
Mega JANUS HENDERSON GROUP PLC $79,851,765 1.30% 918,153
Mega ALLIANCEBERNSTEIN L.P. $79,178,618 1.29% 910,413
Large Point72 Asset Management, L.P. $73,646,282 1.20% 846,801
Large Woodline Partners LP $66,000,750 1.07% 758,891
Large ADAGE CAPITAL PARTNERS GP, L.L.C. $63,117,955 1.03% 725,744
Mid Siren, L.L.C. $63,097,691 1.03% 725,511
Mega MORGAN STANLEY $61,224,962 1.00% 703,978
Mid Rock Springs Capital Management LP $59,987,383 0.98% 689,748
Large Pictet Asset Management Holding SA $58,012,990 0.94% 667,046
Mega BANK OF AMERICA CORP /DE/ Bank $54,675,166 0.89% 628,667
Mega FRANKLIN RESOURCES INC $54,516,706 0.89% 626,845
Mega Clearbridge Investments, LLC $53,002,735 0.86% 609,437
Mid Integral Health Asset Management, LLC $52,182,000 0.85% 600,000
Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC $47,089,903 0.77% 541,450
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $45,786,139 0.74% 526,459
Mega NORTHERN TRUST CORP Bank $43,355,759 0.70% 498,514
Large LOOMIS SAYLES & CO L P $40,449,920 0.66% 465,102
Large Candriam S.C.A. $40,383,649 0.66% 464,340
Mega MILLENNIUM MANAGEMENT LLC $39,295,220 0.64% 451,825
Mid Sofinnova Investments, Inc. $39,144,849 0.64% 450,096
Mid Logos Global Management LP $39,136,500 0.64% 450,000
Large Driehaus Capital Management LLC $37,966,405 0.62% 436,546
Mega VANGUARD FIDUCIARY TRUST CO Bank $36,693,599 0.60% 421,911
Large Artisan Partners Limited Partnership $33,976,482 0.55% 390,669
Mega AMERIPRISE FINANCIAL INC $33,392,738 0.54% 383,957
Mega Invesco Ltd. $31,683,691 0.52% 364,306
Large LORD, ABBETT & CO. LLC $30,348,442 0.49% 348,953
Mid ORBIMED ADVISORS LLC $27,317,277 0.44% 314,100
Mid BRAIDWELL LP $27,015,317 0.44% 310,628
Small SILVERARC CAPITAL MANAGEMENT, LLC $26,612,820 0.43% 306,000
Mega Bank of New York Mellon Corp Bank $25,508,121 0.41% 293,298
Large Qube Research & Technologies Ltd $24,172,702 0.39% 277,943
Mega WELLINGTON MANAGEMENT GROUP LLP $23,808,642 0.39% 273,757
Large Squarepoint Ops LLC $22,870,326 0.37% 262,968
Large RENAISSANCE TECHNOLOGIES LLC $22,439,216 0.36% 258,011
Mega BNP PARIBAS ARBITRAGE, SA $21,557,775 0.35% 247,876
Mid Hood River Capital Management LLC $20,865,146 0.34% 239,912
Large VOYA INVESTMENT MANAGEMENT LLC $20,334,454 0.33% 233,810
Mega UBS Group AG $20,146,599 0.33% 231,650
Mid ADAR1 Capital Management, LLC $18,389,806 0.30% 211,450
Mid SummitTX Capital, L.P. $14,402,145 0.23% 165,599
Large Connor, Clark & Lunn Investment Management Ltd. $13,205,698 0.21% 151,842
Mega DEUTSCHE BANK AG\ Bank $12,315,038 0.20% 141,601
Large M&G PLC $12,051,171 0.20% 138,567
Small PFM Health Sciences, LP $11,881,928 0.19% 136,621
Mega SCHRODER INVESTMENT MANAGEMENT GROUP $11,451,687 0.19% 131,674
Small NEXTBio Capital Management LP $10,965,003 0.18% 126,078
Large NEW YORK STATE COMMON RETIREMENT FUND Pension $10,889,252 0.18% 125,207
Small Opaleye Management Inc. $10,697,310 0.17% 123,000
Mega Nuveen, LLC $10,208,190 0.17% 117,376
Large Russell Investments Group, Ltd. $10,063,469 0.16% 115,712
Mega Capital World Investors $10,061,820 0.16% 115,693
Mega Swiss National Bank Bank $9,758,034 0.16% 112,200
Mid AXIOM INVESTORS LLC /DE $7,979,410 0.13% 91,749
Mid First Light Asset Management, LLC $7,582,131 0.12% 87,181
Mega FIRST TRUST ADVISORS LP $7,436,456 0.12% 85,506
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $7,209,813 0.12% 82,900
Large WCM INVESTMENT MANAGEMENT, LLC $7,011,521 0.11% 80,620
Large Aberdeen Group plc $6,901,678 0.11% 79,357
Mid Granahan Investment Management, LLC $6,758,351 0.11% 77,709
Mega NEUBERGER BERMAN GROUP LLC $6,386,554 0.10% 73,434
Mega RHUMBLINE ADVISERS $6,075,550 0.10% 69,858
Mid KENNEDY CAPITAL MANAGEMENT LLC $5,724,191 0.09% 65,818
Large CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Pension $5,723,147 0.09% 65,806
Large Universal- Beteiligungs- und Servicegesellschaft mbH $5,473,543 0.09% 62,936
Small Blue Owl Capital Holdings LP $5,344,741 0.09% 61,455
Mid XTX Topco Ltd $5,174,888 0.08% 59,502
Mega AQR CAPITAL MANAGEMENT LLC $5,155,490 0.08% 59,279
Mid ALGERT GLOBAL LLC $5,088,875 0.08% 58,513
Mid Atom Investors LP $4,957,290 0.08% 57,000
Large Balyasny Asset Management L.P. $4,606,539 0.07% 52,967
Mid CASTLEARK MANAGEMENT LLC $4,546,704 0.07% 52,279
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $4,416,684 0.07% 50,784
Mega MANUFACTURERS LIFE INSURANCE COMPANY, THE Insurance $4,415,379 0.07% 50,769
Mid PICTON MAHONEY ASSET MANAGEMENT $4,380,852 0.07% 50,372
Large Rafferty Asset Management, LLC $4,357,631 0.07% 50,105
Mega RAYMOND JAMES FINANCIAL INC $4,341,541 0.07% 49,920
Mega VANGUARD ASSET MANAGEMENT, Ltd $4,321,452 0.07% 49,689
Small Nan Fung Group Holdings Ltd $4,271,966 0.07% 49,120
Small Harvest Investment Services, LLC $4,215,261 0.07% 48,468
Mega Legal & General Group Plc $4,090,371 0.07% 47,032
Large SILVERCREST ASSET MANAGEMENT GROUP LLC $4,077,762 0.07% 46,887
Key facts CIK 1649904 CUSIP 76243J105 13F (30d) 6 filings 5 filers Visit website Investor relations

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