Rhythm Pharmaceuticals Ownership | Who Owns Rhythm Pharmaceuticals?
Rhythm Pharmaceuticals Ownership Summary
Rhythm Pharmaceuticals is owned by 94.92% institutional investors, 0.53% insiders, and 4.55% retail investors. Blackrock funding, inc. /de is the largest institutional shareholder, holding 11.35% of RYTM shares. PRIMECAP Odyssey Aggressive Growth is the top mutual fund, with 7.28% of its assets in Rhythm Pharmaceuticals shares.
RYTM Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | Rhythm Pharmaceuticals | 94.92% | 0.53% | 4.55% |
| Sector | Healthcare Stocks | 57.39% | 9.93% | 32.68% |
| Industry | Biotech Stocks | 68.48% | 9.65% | 21.87% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Blackrock funding, inc. /de | 6.95M | 11.35% | $389.10M |
| Blackrock | 6.74M | 11.21% | $276.82M |
| Primecap management co/ca/ | 6.57M | 10.73% | $367.86M |
| Ra capital management | 6.08M | 9.94% | $340.61M |
| Baker bros. advisors lp | 6.08M | 9.94% | $340.60M |
| Perceptive advisors | 3.68M | 6.01% | $206.03M |
| Vanguard group | 3.44M | 5.62% | $192.72M |
| Nea management company | 2.91M | 4.75% | $162.90M |
| Frazier life sciences management | 2.37M | 3.94% | $97.37M |
| State street | 2.00M | 3.33% | $82.28M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Checkpoint capital | 727.98K | 20.74% | $40.75M |
| Nea management company | 2.91M | 9.19% | $162.90M |
| Perceptive advisors | 3.68M | 5.68% | $206.03M |
| Opaleye management | 500.00K | 4.90% | $27.99M |
| Frazier life sciences management | 2.37M | 4.55% | $97.37M |
| Ra capital management | 6.08M | 4.53% | $340.61M |
| Baker bros. advisors lp | 6.08M | 3.64% | $340.60M |
| Silverarc capital management | 273.90K | 3.35% | $15.33M |
| Stempoint capital lp | 208.02K | 2.91% | $11.64M |
| Rock springs capital management lp | 1.16M | 2.48% | $65.09M |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Janus henderson group | 1.22M | 0.03% | 621.43K |
| Driehaus capital management | 1.18M | 0.47% | 326.87K |
| Morgan stanley | 475.65K | 0.00% | 292.78K |
| Marshall wace, llp | 692.80K | 0.05% | 286.19K |
| Nisa investment advisors | 374.35K | 0.10% | 229.06K |
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 |
| Commodore capital lp | - | - | -650.00K |
| Primecap management co/ca/ | 6.57M | 0.28% | -645.72K |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Norges bank | 205.65K | 0.00% | 205.65K | $11.51M |
| Nomura | 157.30K | 0.01% | 157.30K | $6.46M |
| Walleye capital | 144.34K | 0.02% | 144.34K | $8.08M |
| Balyasny asset management | 138.36K | 0.01% | 138.36K | $7.75M |
| Hap trading | 109.80K | 0.04% | 109.80K | $312.93K |
Sold Out
| Holder | Change |
|---|---|
| Innealta capital | -7.00 |
| Nelson, van denburg & campbell wealth management group | -10.00 |
| Capital performance advisors llp | -16.00 |
| Allspring global investments | -26.00 |
| Global retirement partners | -35.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| 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% |
| Mar 31, 2024 | 176 | -0.56% | 67,967,471 | 1.91% | 113 | 0.84% | 88 | 2.33% | 55 | -15.38% |
| Dec 31, 2023 | 177 | 15.69% | 66,693,635 | -2.13% | 115 | 0.83% | 86 | -4.44% | 65 | 71.05% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| PRIMECAP Odyssey Aggressive Growth | 4.48M | 7.28% | -314.92K |
| Vanguard Total Stock Mkt Idx Inv | 1.93M | 3.05% | 1.55K |
| Vanguard US Total Market Shares ETF | 1.92M | 3.03% | 2.33K |
| PRIMECAP Odyssey Growth | 1.81M | 2.94% | -284.97K |
| iShares Russell 2000 ETF | 1.44M | 2.27% | -12.43K |
| Polar Capital Biotech S Inc | 1.25M | 1.98% | - |
| Vanguard Institutional Extnd Mkt Idx Tr | 790.27K | 1.25% | 1.16K |
| Federated Hermes Kaufmann Small Cap Grow | 740.07K | 1.20% | -59.93K |
| Federated Hermes Kaufmann Small Cap A | 740.07K | 1.20% | -59.93K |
| Federated Hermes Kaufmann R | 691.29K | 1.12% | -148.71K |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| Apr 08, 2025 | Cramer Pamela J. | Chief Human Resources Officer | Sell | $435.86K |
| Apr 08, 2025 | Cramer Pamela J. | Chief Human Resources Officer | Sell | $402.00K |
| Apr 08, 2025 | Cramer Pamela J. | Chief Human Resources Officer | Sell | $375.23K |
| Apr 08, 2025 | Cramer Pamela J. | Chief Human Resources Officer | Sell | $35.40K |
| Apr 08, 2025 | Mazabraud Yann | EVP, Head of International | Sell | $509.43K |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2025 Q2 | - | 6 |
| 2025 Q1 | - | 35 |
| 2024 Q4 | - | 9 |
| 2024 Q3 | - | 17 |
| 2024 Q2 | - | 3 |
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