Rhythm Pharmaceuticals Ownership | Who Owns Rhythm Pharmaceuticals?
Rhythm Pharmaceuticals Ownership Summary
Rhythm Pharmaceuticals is owned by 104.47% institutional investors, 0.65% insiders. Blackrock is the largest institutional shareholder, holding 11.21% of RYTM shares. PRIMECAP Odyssey Aggressive Growth is the top mutual fund, with 4.68% of its assets in Rhythm Pharmaceuticals shares.
RYTM Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | Rhythm Pharmaceuticals | 104.47% | 0.65% | -5.11% |
| Sector | Healthcare Stocks | 488.17% | 11.08% | -399.26% |
| Industry | Biotech Stocks | 306.59% | 11.10% | -217.69% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Blackrock | 6.74M | 11.21% | $276.82M |
| Blackrock funding, inc. /de | 6.27M | 9.84% | $396.05M |
| Baker bros. advisors lp | 5.60M | 8.80% | $354.15M |
| Ra capital management | 5.56M | 8.73% | $351.42M |
| Primecap management co/ca/ | 4.88M | 7.66% | $308.24M |
| Vanguard group | 3.44M | 5.62% | $192.72M |
| Nea management company | 2.91M | 4.57% | $183.88M |
| Perceptive advisors | 2.42M | 3.80% | $152.81M |
| State street | 2.00M | 3.33% | $82.28M |
| Goldman sachs group | 1.81M | 2.96% | $101.45M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Checkpoint capital | 727.98K | 20.74% | $40.75M |
| Nea management company | 2.91M | 13.84% | $183.88M |
| Ra capital management | 5.56M | 5.92% | $351.42M |
| Perceptive advisors | 2.42M | 5.67% | $152.81M |
| Opaleye management | 500.00K | 4.90% | $27.99M |
| Nan fung group | 49.12K | 4.89% | $3.10M |
| Silverarc capital management | 400.77K | 4.67% | $25.32M |
| Stempoint capital lp | 176.75K | 3.58% | $11.17M |
| Baker bros. advisors lp | 5.60M | 3.44% | $354.15M |
| Rock springs capital management lp | 861.15K | 3.39% | $54.42M |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Polar capital | 1.25M | 0.41% | 750.87K |
| Janus henderson group | 1.22M | 0.03% | 621.43K |
| Adage capital partners gp | 341.00K | 0.04% | 341.00K |
| Morgan stanley | 475.65K | 0.00% | 292.78K |
| Westfield capital management co lp | 1.63M | 0.43% | 288.38K |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Goldman sachs group | 1.81M | 0.02% | -2.07M |
| Healthcare of ontario pension plan trust fund | - | - | -1.11M |
| State street | 2.00M | 0.00% | -1.01M |
| Primecap management co/ca/ | 4.88M | 0.24% | -909.28K |
| Frazier life sciences management | - | - | -678.76K |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Adage capital partners gp | 341.00K | 0.04% | 341.00K | $21.55M |
| Norges bank | 205.65K | 0.00% | 205.65K | $11.51M |
| Artisan partners limited partnership | 174.48K | 0.02% | 174.48K | $11.03M |
| Nomura | 157.30K | 0.01% | 157.30K | $6.46M |
| Logos global management lp | 130.00K | 0.91% | 130.00K | $8.21M |
Sold Out
| Holder | Change |
|---|---|
| Ifp advisors | -1.00 |
| Innealta capital | -7.00 |
| Covestor | -10.00 |
| Hexagon capital partners | -11.00 |
| Ronald blue trust | -15.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Jun 30, 2025 | 236 | -0.42% | 66,529,034 | 4.29% | 104 | 1.02% | 124 | -3.88% | 76 | 7.04% |
| Mar 31, 2025 | 238 | 12.26% | 64,653,938 | -0.38% | 102 | 0.91% | 130 | 11.11% | 72 | 26.32% |
| Dec 31, 2024 | 197 | 5.35% | 58,110,291 | -14.09% | 94 | 0.78% | 112 | 20.43% | 50 | -12.28% |
| Sep 30, 2024 | 187 | 7.47% | 67,638,955 | -2.40% | 110 | 0.83% | 93 | 3.33% | 57 | 9.62% |
| Jun 30, 2024 | 174 | -1.14% | 69,303,085 | 1.97% | 115 | 0.90% | 90 | 2.27% | 52 | -5.45% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| PRIMECAP Odyssey Aggressive Growth | 3.09M | 4.68% | -779.65K |
| Vanguard Total Stock Mkt Idx Inv | 2.02M | 3.05% | -51.22K |
| Vanguard US Total Market Shares ETF | 1.92M | 3.03% | 2.33K |
| PRIMECAP Odyssey Growth | 1.53M | 2.32% | -111.43K |
| iShares Russell 2000 ETF | 1.28M | 1.93% | -24.36K |
| Polar Capital Biotech S Inc | 1.25M | 1.89% | - |
| Federated Hermes Kaufmann Small Cap A | 742.00K | 1.12% | 1.93K |
| Federated Hermes Kaufmann Small Cap Grow | 742.00K | 1.12% | 1.93K |
| Federated Hermes Kaufmann R | 733.00K | 1.11% | 41.70K |
| Federated Hermes Kaufmann Growth | 733.00K | 1.11% | 41.70K |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| Sep 02, 2025 | Shulman Joseph | Chief Technical Officer | Sell | $1.77M |
| Aug 21, 2025 | Shulman Joseph | Chief Technical Officer | Sell | $419.09K |
| Aug 12, 2025 | Smith Hunter C | Chief Financial Officer | Sell | $2.37M |
| Aug 13, 2025 | Smith Hunter C | Chief Financial Officer | Sell | $333.79K |
| Aug 12, 2025 | German Christopher Paul | Corporate Controller & CAO | Sell | $142.50K |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2025 Q3 | - | 19 |
| 2025 Q2 | - | 16 |
| 2025 Q1 | - | 35 |
| 2024 Q4 | - | 9 |
| 2024 Q3 | - | 17 |
RYTM Ownership FAQ
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