13F

Stock

Rhythm Pharmaceuticals, Inc.

RYTM · held by 280 managers

Reported value

$7.54B

Holders

280

+3 new · −0 exited

Holders’ est. mark

$8.56M

Price effect on 8 books still in the name

Largest holder

$713.6M

RA CAPITAL MANAGEMENT, L.P.

Notable conviction

Share of each notable manager’s 13F book.

Holder count by quarter

Who holds it

Notable only
InvestorSharesValueEst. markChange
RA CAPITAL MANAGEMENT, L.P.6.67M$713.6M—Held
BlackRock, Inc.6.3M$674.1M—Held
Vanguard6.21M$664.8M—Held
BAKER BROS. ADVISORS LP5.6M$599.9M—Held
PRIMECAP MANAGEMENT CO/CA/3.48M$372.4M—Held
NEA Management Company, LLC2.91M$311.5M—Held
PERCEPTIVE ADVISORS LLC2.55M$272.6M—Held
State Street2.2M$235.3M—Held
GOLDMAN SACHS GROUP INC1.83M$196M—Held
Fidelity1.71M$182.6M—Held
FEDERATED HERMES, INC.1.62M$173.8M—Held
JPMORGAN CHASE & CO1.42M$152.4M—Held
GEODE CAPITAL MANAGEMENT, LLC1.38M$147.3M—Held
Driehaus Capital Management LLC1.29M$137.6M—Held
WESTFIELD CAPITAL MANAGEMENT CO LP1.27M$135.6M—Held
Polar Capital Holdings Plc1.19M$126.9M—Held
JANUS HENDERSON GROUP PLC1.13M$120.6M—Held
Checkpoint Capital L.P.992.2K$106.2M—Held
Capital Research Global Investors985.1K$105.4M—Held
ALLIANCEBERNSTEIN L.P.930.2K$99.6M—Held
JENNISON ASSOCIATES LLC918.6K$98.3M—Held
FRANKLIN RESOURCES INC695.7K$74.5M—Held
Rock Springs Capital Management LP695K$74.4M—Held
Woodline Partners LP688.8K$73.7M—Held
MORGAN STANLEY651.4K$69.7M$2.81MAdded$22.7M
ADAGE CAPITAL PARTNERS GP, L.L.C.621.6K$66.5M—Held
Pictet Asset Management Holding SA614.7K$66.2M—Held
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC549K$58.8M—Held
CHARLES SCHWAB INVESTMENT MANAGEMENT INC532.4K$57M—Held
Clearbridge Investments, LLC506.1K$54.2M—Held
LOOMIS SAYLES & CO L P503.9K$53.9M—Held
Siren, L.L.C.500K$53.5M—Held
NORTHERN TRUST CORP488.2K$52.3M—Held
Integral Health Asset Management, LLC475K$50.8M—Held
Point72 Asset Management, L.P.429.4K$46M—Held
UBS Group AG427.2K$45.7M—Held
Renaissance Technologies341.2K$36.5M—Held
Opaleye Management Inc.330K$35.3M—Held
Qube Research & Technologies Ltd310.9K$33.3M—Held
Bank of New York Mellon Corp301.1K$32.2M—Held
First Light Asset Management, LLC295.8K$31.7M—Held
Invesco Ltd.291.1K$31.2M—Held
Candriam S.C.A.287.9K$30.8M—Held
Sofinnova Investments, Inc.271.4K$29.1M—Held
Artisan Partners Limited Partnership263.6K$28.2M—Held
AMERIPRISE FINANCIAL INC261.2K$28M—Held
WELLINGTON MANAGEMENT GROUP LLP250.2K$26.8M—Held
VOYA INVESTMENT MANAGEMENT LLC249.9K$26.7M—Held
ORBIMED ADVISORS LLC239.8K$25.7M—Held
Hood River Capital Management LLC237K$25.4M—Held
BANK OF AMERICA CORP /DE/224.5K$24M$1.36MAdded$482.9K
Logos Global Management LP190K$20.3M—Held
MILLENNIUM MANAGEMENT LLC186.7K$20M—Held
BNP PARIBAS FINANCIAL MARKETS164.6K$17.6M—Held
Citadel153.3K$16.4M—Held
Connor, Clark & Lunn Investment Management Ltd.149.4K$16M—Held
First Turn Management, LLC146.3K$15.7M—Held
M&G PLC137.1K$14.7M—Held
SILVERARC CAPITAL MANAGEMENT, LLC135.9K$14.6M—Held
Russell Investments Group, Ltd.134.2K$14.4M—Held
BARCLAYS PLC131.4K$14.1M$795.2KCut−$310.6K
DEUTSCHE BANK AG\129.1K$13.8M—Held
Universal- Beteiligungs- und Servicegesellschaft mbH123.5K$13.2M—Held
Nuveen, LLC115.9K$12.4M—Held
Capital World Investors115.7K$12.4M—Held
Swiss National Bank111.3K$11.9M—Held
NEW YORK STATE COMMON RETIREMENT FUND93.7K$10M—Held
FIRST TRUST ADVISORS LP88.5K$9.47M—Held
AXIOM INVESTORS LLC /DE83.6K$8.94M—Held
Zweig-DiMenna Associates LLC81.6K$8.73M—Held
SummitTX Capital, L.P.80.7K$8.64M—Held
ExodusPoint Capital Management, LP75.1K$8.04M—Held
NEUBERGER BERMAN GROUP LLC73.6K$7.88M—Held
WELLS FARGO & COMPANY/MN72.6K$7.77M—Held
Balyasny Asset Management L.P.72.3K$7.74M—Held
RHUMBLINE ADVISERS71.2K$7.62M—Held
Icahn Capital70K$7.5M—Held
NEXTBio Capital Management LP67.6K$7.23M—Held
NORGES BANK66.2K$7.09M$3.58MCut−$4.75M
CASTLEARK MANAGEMENT LLC64.5K$6.9M—Held
VOLORIDGE INVESTMENT MANAGEMENT, LLC60.6K$6.48M—Held
MANUFACTURERS LIFE INSURANCE COMPANY, THE59.6K$6.37M—Held
PDT Partners, LLC59.4K$6.36M—Held
STEMPOINT CAPITAL LP58.9K$6.31M—Held
Informed Momentum Co LLC57.3K$6.14M—Held
Rafferty Asset Management, LLC55.5K$5.94M—Held
Legal & General Group Plc55.1K$5.9M—Held
TD Asset Management Inc55K$5.89M—Held
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM53.5K$5.73M—Held
Granahan Investment Management, LLC53.5K$5.72M—Held
PRUDENTIAL FINANCIAL INC53.1K$5.69M—Held
ADAR1 Capital Management, LLC51.3K$5.5M—Held
Nan Fung Group Holdings Ltd49.1K$5.26M—Held
VICTORY CAPITAL MANAGEMENT INC45.4K$4.86M—Held
WCM INVESTMENT MANAGEMENT, LLC44.8K$4.78M—Held
Harvest Investment Services, LLC44K$4.7M—Held
HighVista Strategies LLC42.9K$4.59M—Held
Hillsdale Investment Management Inc.42.3K$4.53M—Held
RAYMOND JAMES FINANCIAL INC41.1K$4.4M—Held
PFM Health Sciences, LP40.2K$4.3M—Held
KENNEDY CAPITAL MANAGEMENT LLC39.9K$4.27M—Held
SEI INVESTMENTS CO37.4K$4.01M—Held
STATE OF WISCONSIN INVESTMENT BOARD36.1K$3.86M—Held
Rhenman & Partners Asset Management AB35K$3.75M—Held
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.34.9K$3.73M—Held
Nicholas Investment Partners, LP34.7K$3.72M—Held
SILVERCREST ASSET MANAGEMENT GROUP LLC34.1K$3.65M—Held
Squarepoint Ops LLC32.8K$3.51M—Held
DIMENSIONAL FUND ADVISORS LP32K$3.43M—Held
D. E. Shaw & Co., Inc.31.4K$3.36M—Held
Magnetar Financial LLC29.6K$3.17M—Held
EFG International AG29.3K$3.14M—Held
MetLife Investment Management, LLC29.2K$3.12M—Held
LAZARD ASSET MANAGEMENT LLC25.6K$2.74M—Held
LOS ANGELES CAPITAL MANAGEMENT LLC24.3K$2.72M—Held
Creative Planning25.2K$2.7M—Held
Atom Investors LP22.9K$2.45M—Held
INTECH INVESTMENT MANAGEMENT LLC21.4K$2.29M—Held
PROFUND ADVISORS LLC21K$2.25M—Held
State of New Jersey Common Pension Fund D19.3K$2.06M—Held
WEDGE CAPITAL MANAGEMENT L L P/NC19.2K$2.06M—Held
Advisors Asset Management, Inc.18.5K$1.98M—Held
CAPTRUST FINANCIAL ADVISORS18.3K$1.96M—Held
ARIZONA STATE RETIREMENT SYSTEM15.8K$1.69M—Held
STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM14.7K$1.57M—Held
Police & Firemen's Retirement System of New Jersey14.2K$1.52M—Held
STIFEL FINANCIAL CORP13.2K$1.42M—Held
NISA INVESTMENT ADVISORS, LLC13.1K$1.41M—Held
CITIGROUP INC12.7K$1.36M—Held
ProShare Advisors LLC12.6K$1.35M—Held
Zurcher Kantonalbank (Zurich Cantonalbank)12.4K$1.33M—Held
GUGGENHEIM CAPITAL LLC12.4K$1.33M—Held
KLP KAPITALFORVALTNING AS12K$1.28M—Held
STRS OHIO12K$1.28M—Held
Rockefeller Capital Management L.P.11.8K$1.26M—Held
DNB Asset Management AS11.2K$1.19M—Held
Hennion & Walsh Asset Management, Inc.10.9K$1.17M—Held
China Universal Asset Management Co., Ltd.10.9K$1.16M—Held
XTX Topco Ltd10.4K$1.12M—Held
Knights of Columbus Asset Advisors LLC10.3K$1.1M—Held
Cannon Financial Strategists, Inc.10K$1.07M—Held
TOTH FINANCIAL ADVISORY CORP10K$1.07M—Held
Man Group plc9.56K$1.02M—Held
FRED ALGER MANAGEMENT, LLC9.3K$995.6K—Held
VIRGINIA RETIREMENT SYSTEMS ET Al9.2K$984.8K—Held
Headlands Technologies LLC8.63K$924K—Held
TEACHER RETIREMENT SYSTEM OF TEXAS8.36K$894.7K—Held
Allianz Asset Management GmbH8K$856.3K—Held
Bellevue Group AG7.5K$803.2K—Held
Leo Wealth, LLC6.95K$744.1K—Held
Jump Financial, LLC6.76K$723.5K—Held
E. Ohman J:or Asset Management AB6.59K$705.3K—Held
PRINCIPAL FINANCIAL GROUP INC6.2K$663.4K—Held
EXCHANGE TRADED CONCEPTS, LLC6.08K$650.8K—Held
Virtus Investment Advisers, LLC6.02K$644.1K—Held
Legato Capital Management LLC5.72K$612.6K—Held
Jasper Ridge Partners, L.P.5.64K$603.6K—Held
Quantedge Capital Pte Ltd5.6K$599.4K—Held
LPL Financial LLC5.43K$580.9K—Held
AlphaCentric Advisors LLC5.05K$540.8K—Held
Voleon Capital Management LP5.03K$537.9K—Held
TWO SIGMA SECURITIES, LLC4.94K$529.1K—Held
Gotham Asset Management, LLC4.85K$519.3K—Held
PSP Research LLC4.74K$507.2K—Held
PNC Financial Services Group, Inc.4.66K$498.7K—Held
Caption Management, LLC4.61K$493.9K—Held
Vestmark Advisory Solutions, Inc.4.56K$488.1K—Held
Verition Fund Management LLC4.5K$482.1K—Held
MACKENZIE FINANCIAL CORP4.4K$468.6K—Held
Ameritas Investment Partners, Inc.4.37K$467.2K—Held
XPONANCE LLC4.27K$457K—Held
Empowered Funds, LLC4.16K$445.7K—Held
SUSQUEHANNA INTERNATIONAL GROUP, LLP4.1K$438.5K—Held
COMERICA BANK4.01K$429.6K—Held
Ensign Peak Advisors, Inc3.86K$413.1K—Held
Quantinno Capital Management LP3.83K$410.1K—Held
Freestone Capital Holdings, LLC3.7K$396K—Held
Cerity Partners LLC3.66K$392.2K—Held
O'SHAUGHNESSY ASSET MANAGEMENT, LLC3.58K$383.2K—Held
Avior Wealth Management, LLC3.57K$382.3K—Held
CIBC WORLD MARKETS CORP3.5K$374.9K—Held
Tidal Investments LLC3.34K$357.1K—Held
KEYBANK NATIONAL ASSOCIATION/OH3.27K$350.1K—Held
Mirae Asset Global Investments Co., Ltd.3.24K$347.1K—Held
Cinctive Capital Management LP3.23K$345.2K—Held
Yorktown Management & Research Co Inc3.05K$326.5K—Held
CIM INVESTMENT MANAGEMENT INC2.99K$320.4K—Held
Tower Research Capital LLC (TRC)2.96K$317.1K—Held
TWO SIGMA ADVISERS, LP2.9K$310.4K—Held
Blueshift Asset Management, LLC2.88K$308.4K—Held
JGP Global Gestao de Recursos Ltda.2.87K$306.8K—Held
CIBC Asset Management Inc2.85K$304.9K—Held
Swiss Life Asset Management Ltd2.65K$284K$14.9KAdded$35.4K
Chicago Partners Investment Group LLC2.74K$281.8K—Held
Entropy Technologies, LP2.49K$266.7K—Held
State of Wyoming2.44K$261.3K—Held
Vanguard Personalized Indexing Management, LLC2.38K$254.6K—Held
Abel Hall, LLC2.14K$229.1K—Held
M&T Bank Corp2.1K$224.9K—Held
Cambria Investment Management, L.P.2K$213.8K—New
ELEVATION WEALTH PARTNERS, LLC1.97K$211K—Held
JANE STREET GROUP, LLC1.96K$209.8K—Held
WHITTIER TRUST CO1.81K$180.1K—Held
ROYAL BANK OF CANADA1.68K$180K—Held
PRICE T ROWE ASSOCIATES INC /MD/1.56M$167.1K—Held
AlphaQuest LLC1.51K$161.4K—Held
Persistent Asset Partners Ltd1.45K$154.8K—New
GF FUND MANAGEMENT CO. LTD.1.31K$140.2K—Held
Clearstead Advisors, LLC1.25K$133.4K—Held
DANSKE BANK A/S1.1K$117.7K—New
OSAIC HOLDINGS, INC.1.04K$111.2K—Held
US BANCORP \DE\953$102K—Held
Global Retirement Partners, LLC857$91.7K—Held
CFG Wealth Management Services, Inc.800$85.6K—Held
Farther Finance Advisors, LLC642$68.7K—Held
LORD, ABBETT & CO. LLC619.5K$66.3K—Held
Smartleaf Asset Management LLC399$42.6K—Held
Arax Advisory Partners381$40.8K—Held
GAMMA Investing LLC361$38.6K—Held
Sterling Capital Management LLC344$36.8K—Held
SBI Securities Co., Ltd.343$36.7K—Held
EverSource Wealth Advisors, LLC266$28.5K—Held
SIGNATUREFD, LLC232$24.8K—Held
JONES FINANCIAL COMPANIES LLLP231$24.7K—Held
Essential Partners LLC223$23.9K$1.2KAdded$3.87K
Kemnay Advisory Services Inc.207$22.2K—Held
True Wealth Design, LLC147$15.7K—Held
Truvestments Capital LLC138$14.8K—Held
AdvisorNet Financial, Inc137$14.7K—Held
Bayforest Capital Ltd134$14.3K—Held
Allworth Financial LP109$11.7K$660Cut−$1.56K
Optiver Holding B.V.92$9.85K—Held
ROTHSCHILD INVESTMENT LLC91$9.74K—Held
ALGERT GLOBAL LLC88.3K$9.45K—Held
Quarry LP77$8.24K—Held
Larson Financial Group LLC77$8.24K—Held
HARBOUR INVESTMENTS, INC.60$6.42K—Held
WPG Advisers, LLC60$6.42K—Held
EASTERN BANK59$6.32K—Held
Root Financial Partners, LLC43$4.6K—Held
HARBOR CAPITAL ADVISORS, INC.40.9K$4.38K—Held
ORG Partners LLC37$3.96K—Held
IFP Advisors, Inc36$3.85K$115Added$1.93K
Versant Capital Management, Inc36$3.85K—Held
Parkside Financial Bank & Trust33$3.53K—Held
SageView Advisory Group, LLC30$3.21K—Held
FIRST HORIZON CORP30$3.21K—Held
Parallel Advisors, LLC25$2.68K—Held
Bare Financial Services, Inc22$2.35K—Held
Penserra Capital Management LLC21.5K$2.3K—Held

Positions as of Q4 2025. 13F filings arrive up to 45 days after quarter-end and omit shorts. Values are quarter-end marks, as filed. Estimated mark is the price effect on shares still held — not realized P&L or investment advice.