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Rhythm Pharmaceuticals (RYTM) Institutional Ownership

Rhythm Pharmaceuticals logo
$115.63 +3.53 (+3.15%)
Closing price 08/7/2026 04:00 PM Eastern
Extended Trading
$117.50 +1.87 (+1.62%)
As of 08/7/2026 07:34 PM Eastern
Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Massive. Learn more.
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Institutional Ownership Changes (13F Filings) for Rhythm Pharmaceuticals (NASDAQ:RYTM)

Number of
Institutional Buyers
(last 12 months)
180
Total
Institutional Inflows
(last 12 months)
$2.34B
Number of
Institutional Sellers
(last 12 months)
102
Total
Institutional Outflows
(last 12 months)
$45.36B
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RYTM Institutional Buying and Selling by Quarter

Rhythm Pharmaceuticals Major Shareholders & Ownership History

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Reporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
8/7/2026 BlackRock Inc.6,156,902$683.60M0.0%N/A8.984%
8/7/2026 Deutsche Bank AG115,232$12.79M0.0%N/A0.168%
8/6/2026 Global Retirement Partners LLC460$51K0.0%N/A0.001%
8/6/2026 Bank of New York Mellon Corp394,044$43.75M0.0%N/A0.575%
8/6/2026 State of Wyoming6,354$705K0.1%N/A0.009%
8/3/2026 Walleye Capital LLC5,996$666K0.0%N/A0.009%
7/10/2026 Wedge Capital Management L L P NC23,422$2.60M0.0%-4.5%0.034%
7/10/2026 E. Ohman J or Asset Management AB5,523$613K0.0%+25.3%0.008%
7/10/2026 Handelsbanken Fonder AB18,921$2.10M0.0%+8.0%0.028%
7/8/2026 Assenagon Asset Management S.A.186,491$20.71M0.0%N/A0.272%
7/7/2026 GAMMA Investing LLC364$40K0.0%+36.3%0.001%
7/7/2026 Avior Wealth Management LLC5,440$604K0.0%+17.0%0.008%
5/29/2026Perceptive Advisors LLC2,373,795$206.45M4.0%-6.8%3.464%
5/19/2026Bank of America Corp DE628,667$54.68M0.0%+180.0%0.917%
5/19/2026Janus Henderson Group PLC918,153$79.89M0.0%-18.5%1.340%
5/18/2026ADAR1 Capital Management LLC211,450$18.39M1.1%+311.8%0.309%
5/18/2026Amundi4,017$349K0.0%N/A0.006%
5/18/2026 EverSource Wealth Advisors LLC549$48K0.0%+106.4%0.001%
5/18/2026California State Teachers Retirement System65,806$5.72M0.0%+22.9%0.096%
5/18/2026Rock Springs Capital Management LP689,748$59.99M3.5%-0.8%1.006%
5/18/2026Exome Asset Management LLC40,581$3.53M1.8%N/A0.059%
5/16/2026The Manufacturers Life Insurance Company50,769$4.42M0.0%-14.8%0.074%
5/16/2026First Light Asset Management LLC87,181$7.58M0.7%-70.5%0.127%
5/16/2026SummitTX Capital L.P.165,599$14.40M0.4%+105.1%0.242%
5/16/2026Lazard Asset Management LLC32,888$2.86M0.0%+28.6%0.048%
5/16/2026Castleark Management LLC52,279$4.55M0.2%-18.9%0.076%
5/16/2026Orbimed Advisors LLC314,100$27.32M0.5%+31.0%0.458%
5/15/2026Granahan Investment Management LLC77,709$6.76M0.3%+45.4%0.113%
5/15/2026Entropy Technologies LP10,318$897K0.0%+314.0%0.015%
5/14/2026Renaissance Technologies LLC258,011$22.44M0.0%-24.4%0.376%
5/14/2026Siren L.L.C.725,511$63.10M1.7%+45.1%1.059%
5/14/2026Inceptionr LLC4,379$381K0.1%N/A0.006%
5/14/2026Sei Investments Co.40,685$3.54M0.0%+8.7%0.059%
5/13/2026First Trust Advisors LP85,506$7.44M0.0%-3.4%0.125%
5/8/2026 PNC Financial Services Group Inc.6,938$603K0.0%+48.9%0.010%
5/7/2026WCM Investment Management LLC80,620$7.01M0.0%+79.9%0.118%
5/7/2026Dimensional Fund Advisors LP19,151$1.67M0.0%-40.2%0.028%
5/7/2026 AlphaCentric Advisors LLC9,297$809K0.8%+84.0%0.014%
5/7/2026Swiss National Bank112,200$9.76M0.0%+0.8%0.164%
5/5/2026 Bank of New York Mellon Corp293,298$25.51M0.0%-2.6%0.428%
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5/5/2026Hillsdale Investment Management Inc.40,300$3.51M0.1%-4.7%0.059%
5/4/2026 Principal Financial Group Inc.5,637$490K0.0%-9.1%0.008%
5/4/2026 Chicago Partners Investment Group LLC3,125$266K0.0%+14.1%0.005%
5/1/2026 Fifth Third Bancorp5,260$457K0.0%N/A0.008%
5/1/2026Candriam S.C.A.464,340$40.38M0.2%+61.3%0.680%
4/30/2026Hsbc Holdings PLC14,307$1.23M0.0%N/A0.021%
4/28/2026 Abel Hall LLC4,015$349K0.1%+87.6%0.006%
4/25/2026 Strs Ohio28,914$2.52M0.0%+141.0%0.042%
4/22/2026 Pictet Asset Management Holding SA667,046$57.33M0.1%+8.5%0.977%
4/16/2026 SG Americas Securities LLC18,760$1.63M0.0%+59.8%0.027%
4/16/2026 E. Ohman J or Asset Management AB4,409$383K0.0%-33.1%0.006%
3/17/2026Rockefeller Capital Management L.P.11,771$1.26M0.0%+32.7%0.017%
2/19/2026Invesco Ltd.291,150$31.17M0.0%+102.8%0.436%
2/18/2026Empowered Funds LLC4,164$446K0.0%+94.1%0.006%
2/18/2026XTX Topco Ltd10,433$1.12M0.0%N/A0.016%
2/18/2026Voloridge Investment Management LLC60,575$6.48M0.0%-83.6%0.091%
2/18/2026Virtus Investment Advisers LLC6,017$644K0.2%-14.7%0.009%
2/18/2026Wellington Management Group LLP250,156$26.78M0.0%+922.0%0.375%
2/18/2026SummitTX Capital L.P.80,729$8.64M0.3%+580.2%0.121%
2/18/2026Orbimed Advisors LLC239,800$25.67M0.5%+11.5%0.359%
2/18/2026Opaleye Management Inc.330,000$35.32M4.6%-28.5%0.494%
2/18/2026Perceptive Advisors LLC2,546,391$272.57M4.9%-99.4%3.816%
2/18/2026Millennium Management LLC186,709$19.99M0.0%+17.7%0.280%
2/18/2026Man Group plc9,558$1.02M0.0%-92.6%0.014%
2/18/2026Janus Henderson Group PLC1,126,125$120.59M0.1%-3.0%1.687%
2/18/2026Caption Management LLC4,614$494K0.0%-83.3%0.007%
2/18/2026Cinctive Capital Management LP3,225$345K0.0%-90.8%0.005%
2/18/2026Balyasny Asset Management L.P.72,282$7.74M0.0%-79.3%0.108%
2/17/2026Guggenheim Capital LLC12,401$1.33M0.0%+442.7%0.019%
2/17/2026Logos Global Management LP190,000$20.34M1.2%-5.0%0.285%
2/17/2026ADAR1 Capital Management LLC51,349$5.50M0.4%+3.6%0.077%
2/17/2026PDT Partners LLC59,436$6.36M0.4%-31.0%0.089%
2/17/2026AQR Capital Management LLC70,046$7.50M0.0%-12.2%0.105%
2/17/2026 Abel Hall LLC2,140$229K0.1%N/A0.003%
2/17/2026EFG International AG29,291$3.14M0.1%N/A0.044%
2/17/2026Lazard Asset Management LLC25,571$2.74M0.0%-15.4%0.038%
2/17/2026First Light Asset Management LLC295,844$31.67M2.4%+63.9%0.443%
2/17/2026RA Capital Management L.P.6,666,837$713.62M7.3%+17.3%9.989%
2/17/2026 Quantedge Capital Pte Ltd5,600$599K0.3%-68.5%0.008%
2/17/2026Jump Financial LLC6,759$723K0.0%N/A0.010%
2/17/2026Price T Rowe Associates Inc. MD1,560,847$167.07M0.0%+11.5%2.339%
2/17/2026Rock Springs Capital Management LP695,010$74.39M3.8%-3.1%1.041%
2/17/2026Integral Health Asset Management LLC475,000$50.84M2.5%+115.9%0.712%
2/17/2026Adage Capital Partners GP L.L.C.621,585$66.53M0.1%+14.3%0.931%
2/17/2026California State Teachers Retirement System53,537$5.73M0.0%+9.4%0.080%
2/17/2026 Russell Investments Group Ltd.134,180$14.36M0.0%-14.9%0.201%
2/17/2026Atom Investors LP22,929$2.45M0.2%N/A0.034%
2/17/2026Granahan Investment Management LLC53,452$5.72M0.2%+7.5%0.080%
2/17/2026State of Wisconsin Investment Board36,079$3.86M0.0%-11.5%0.054%
2/17/2026Artisan Partners Limited Partnership263,591$28.22M0.0%+11.3%0.395%
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2/17/2026Fred Alger Management LLC9,301$996K0.0%-24.6%0.014%
2/17/2026ExodusPoint Capital Management LP75,141$8.04M0.1%N/A0.113%
2/17/2026Royal Bank of Canada1,676$180K0.0%-98.7%0.003%
2/17/2026Magnetar Financial LLC29,598$3.17M0.0%N/A0.044%
2/17/2026 Persistent Asset Partners Ltd1,446$155K0.1%N/A0.002%
2/17/2026Polar Capital Holdings Plc1,185,392$126.88M0.5%-4.8%1.776%
2/16/2026Squarepoint Ops LLC32,829$3.51M0.0%N/A0.049%
2/16/2026Sofinnova Investments Inc.271,394$29.05M1.2%+9.9%0.407%
2/16/2026Verition Fund Management LLC4,504$482K0.0%N/A0.007%
2/16/2026NEXTBio Capital Management LP67,586$7.23M4.2%N/A0.101%


RYTM Institutional Ownership - Frequently Asked Questions

During the previous two years, 285 institutional investors and hedge funds held shares of Rhythm Pharmaceuticals. The most heavily invested institutionals were RA Capital Management L.P. ($713.62M), BlackRock Inc. ($683.60M), Vanguard Group Inc. ($664.82M), Primecap Management Co. CA ($372.36M), Baker BROS. Advisors LP ($296.87M), State Street Corp ($235.34M), and Perceptive Advisors LLC ($206.45M).Learn more on Rhythm Pharmaceuticals' institutional investors.

Of the 247 institutional investors that purchased Rhythm Pharmaceuticals' stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: BlackRock Inc. ($6.16M), Vanguard Group Inc. ($2.62M), Westfield Capital Management Co. LP ($1.83M), JPMorgan Chase & Co. ($1.46M), RA Capital Management L.P. ($1.11M), Capital Research Global Investors ($985.09K), and Alliancebernstein L.P. ($920.11K).

Institutional investors have bought a total of 23,297,945 shares in the last 24 months. This purchase volume represents approximately $2.34B in transactions.

Of the 101 institutional investors that sold Rhythm Pharmaceuticals' stock in the last 24 months, the following investors and hedge funds have sold the highest volume of shares: Perceptive Advisors LLC ($416.86M), Primecap Management Co. CA ($2.31M), Balyasny Asset Management L.P. ($579.35K), Westfield Capital Management Co. LP ($560.46K), Marshall Wace LLP ($363.27K), Voloridge Investment Management LLC ($307.69K), and Comerica Bank ($297.65K).

Institutional investors have sold a total of 424,972,966 shares in the last 24 months. This volume of shares sold represents approximately $45.36B in transactions.


Related Companies

Institutional ownership data for NASDAQ:RYTM is compiled from quarterly 13F filings submitted to the U.S. Securities and Exchange Commission (SEC), with the most recent received on 8/7/2026. New 13F filings are added each quarter as they're published.
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