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Rhythm Pharmaceuticals Ownership | Who Owns Rhythm Pharmaceuticals?

OverviewForecastRevenueFinancialsChartTranscripts

Rhythm Pharmaceuticals Ownership Summary

Rhythm Pharmaceuticals is owned by 48.61% institutional investors, 0.76% insiders, and 50.63% retail investors. Blackrock is the largest institutional shareholder, holding 11.21% of RYTM shares. Vanguard Total Stock Mkt Idx Inv is the top mutual fund, with 3.19% of its assets in Rhythm Pharmaceuticals shares.

RYTM Ownership Benchmark

TypeName% Inst% Insiders% Retail
StockRhythm Pharmaceuticals48.61%0.76%50.63%
SectorHealthcare Stocks 35.34%11.88%52.77%
IndustryBiotech Stocks 35.37%11.83%52.80%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

HolderShares% HoldingValue
Blackrock6.74M11.21%$276.82M
Ra capital management6.67M9.97%$579.81M
Vanguard group6.21M9.65%$664.82M
Blackrock funding, inc. /de6.24M9.33%$542.45M
Baker bros. advisors lp5.60M8.38%$487.42M
Primecap management co/ca/3.42M5.11%$297.22M
Perceptive advisors2.37M3.55%$206.45M
State street2.27M3.40%$197.58M
Goldman sachs group1.97M2.94%$170.93M
Westfield capital management co lp1.93M2.88%$167.78M

Top Institutional Shareholders by % of Total Assets

HolderShares% AssetsValue
Checkpoint capital1.23M38.30%$106.73M
Ra capital management6.67M6.14%$579.81M
Opaleye management123.00K4.65%$35.32M
Perceptive advisors2.37M4.04%$206.45M
Rock springs capital management lp689.75K3.54%$59.99M
Nan fung group49.12K3.52%$4.27M
Baker bros. advisors lp5.60M2.80%$487.42M
Silverarc capital management306.00K2.72%$26.61M
Integral health asset management600.00K2.50%$52.18M
Logos global management lp450.00K1.95%$39.14M

Top Buyers

HolderShares% AssetsChange
Citadel advisors1.42M0.02%1.27M
Vanguard group6.21M0.01%1.21M
Westfield capital management co lp1.93M0.70%661.97K
Polar capital1.62M0.50%430.19K
Vanguard fiduciary trust421.91K0.01%421.91K

Top Sellers

HolderShares% AssetsChange
Nea management company---2.91M
Healthcare of ontario pension plan trust fund---1.11M
Jennison associates---918.57K
Driehaus capital management436.55K0.28%-848.68K
Frazier life sciences management---678.76K

New Positions

HolderShares% AssetsChangeValue
Vanguard fiduciary trust421.91K0.01%421.91K$36.69M
Braidwell lp310.63K0.90%310.63K$27.02M
Nomura157.30K0.01%157.30K$6.46M
Hap trading109.80K0.04%109.80K$312.93K
Norges bank66.21K0.00%66.21K$7.09M

Sold Out

HolderChange
Rialto wealth management-1.00
Dunhill financial-1.00
Td private client wealth-1.00
Wealthspire advisors-1.00
Sjs investment consulting-2.00

Institutional Ownership Trends

DateHoldingsChange %SharesChange %OwnershipChange %Increased PositionChange %Decreased PositionChange %
Mar 31, 2026182-35.69%32,508,228-55.40%480.38%101-36.88%54-41.30%
Dec 31, 202578-71.53%8,801,414-87.66%130.11%45-71.88%21-73.42%
Sep 30, 202584-63.48%10,580,828-83.50%160.16%42-65.85%29-60.27%
Jun 30, 2025236-0.42%66,529,0344.29%1041.02%124-3.88%767.04%
Mar 31, 202523812.26%64,653,938-0.38%1020.91%13011.11%7226.32%

Top Mutual Funds Shareholders

HolderShares% HoldingChange
Vanguard Total Stock Mkt Idx Inv2.18M3.19%63.43K
PRIMECAP Odyssey Aggressive Growth2.12M3.10%-32.46K
Vanguard US Total Market Shares ETF1.92M3.03%2.33K
Vanguard Small Cap Index1.58M2.31%60.93K
Polar Capital Biotech S Inc1.53M2.23%526.44K
iShares Russell 2000 ETF1.24M1.81%10.48K
American Funds SMALLCAP World A1.12M1.64%132.37K
PRIMECAP Odyssey Growth1.11M1.61%-29.40K
State Street® SPDR® S&P® Biotech ETF1.05M1.53%-10.38K
Vanguard Small Cap Growth Index Inv882.89K1.29%41.19K

Recent Insider Transactions

DateNameRoleActivityValue
May 15, 2026German Christopher Paul Corporate Controller & CAOSell$428.13K
Mar 04, 2026German Christopher Paul Corporate Controller & CAOSell$502.79K
Feb 17, 2026Smith Hunter C Chief Financial OfficerSell$91.53K
Feb 17, 2026Smith Hunter C Chief Financial OfficerSell$119.30K
Feb 17, 2026Smith Hunter C Chief Financial OfficerSell$20.10K

Insider Transactions Trends

DateBuySell
2026 Q2-1
2026 Q1-24
2025 Q4-9
2025 Q3-19
2025 Q2-16

RYTM Ownership FAQ

Who Owns Rhythm Pharmaceuticals?

Rhythm Pharmaceuticals shareholders are primarily institutional investors at 48.61%, followed by 0.76% insiders and 50.63% retail investors. The average institutional ownership in Rhythm Pharmaceuticals's industry, Biotech Stocks , is 35.37%, which Rhythm Pharmaceuticals exceeds.

Who owns the most shares of Rhythm Pharmaceuticals?

Rhythm Pharmaceuticals’s largest shareholders are Blackrock (6.74M shares, 11.21%), Ra capital management (6.67M shares, 9.97%), and Vanguard group (6.21M shares, 9.65%). Together, they hold 30.83% of Rhythm Pharmaceuticals’s total shares outstanding.

Does Blackrock own Rhythm Pharmaceuticals?

Yes, BlackRock owns 11.21% of Rhythm Pharmaceuticals, totaling 6.74M shares as of Jun 2024. This represents 0.01% of BlackRock's total assets, with a market value of 276.82M$. In the last quarter, BlackRock increased its holdings by 212.28K shares, a 3.25% change.

Who is Rhythm Pharmaceuticals’s biggest shareholder by percentage of total assets invested?

Checkpoint capital is Rhythm Pharmaceuticals’s biggest shareholder by percentage of total assets invested, with 38.30% of its assets in 1.23M Rhythm Pharmaceuticals shares, valued at 106.73M$.

Who is the top mutual fund holder of Rhythm Pharmaceuticals shares?

Vanguard Total Stock Mkt Idx Inv is the top mutual fund holder of Rhythm Pharmaceuticals shares, with 3.19% of its total shares outstanding invested in 2.18M Rhythm Pharmaceuticals shares.

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