Security record
RYTM
Rhythm Pharmaceuticals, Inc. · Healthcare · Biotechnology
113Tracked holders
+6Δ holders
44.38MShares held
$4.90BReported value
+14New positions
−7Exits
Momentum inputs (comparable managers):
holder breadth +5.6% ·
share flow +6.9% ·
net new positions +6.2%
— formula
Broad accumulation — rising shares across more holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q2 2026
Ownership over time
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 113 | +6 | 44.38M | $4.90B | +14 | −7 |
| Q1 2026 | 109 | +6 | 41.83M | $3.64B | +11 | −6 |
| Q4 2025 | 102 | 0 | 43.14M | $4.62B | +3 | −2 |
| Q3 2025 | 20 | +1 | 28.88M | $2.92B | +2 | −2 |
| Q2 2025 | 17 | 0 | 22.96M | $1.45B | +1 | −1 |
| Q1 2025 | 14 | +2 | 11.52M | $610.22M | +2 | — |
| Q4 2024 | 12 | 0 | 11.40M | $638.39M | — | — |
| Q3 2024 | 11 | +3 | 9.71M | $508.75M | +3 | — |
| Q2 2024 | 8 | — | 9.56M | $392.54M | — | — |
Who holds it · Q2 2026
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | BlackRock ✦ (passive) | 6.16M | -1.3% | $683.60M | 0.0% | ▼ Trim | 5 | SEC ↗ ×16 |
| 2 | PRIMECAP Management ✦ | 3.17M | -7.3% | $351.84M | 0.2% | ▼ Trim | 9 | SEC ↗ |
| 3 | Vanguard Capital Management Llc | 3.01M | +1.3% | $333.75M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 4 | JPMorgan Chase ✦ | 2.65M | +70.7% | $292.18M | 0.0% | ▲ Add | 4 | SEC ↗ ×9 |
| 5 | State Street Global Advisors ✦ (passive) | 2.57M | +13.3% | $285.73M | 0.0% | ▲ Add | 7 | SEC ↗ |
| 6 | T. Rowe Price ✦ | 2.57M | +55.1% | $284.92M | 0.0% | ▲ Add | 9 | SEC ↗ ×2 |
| 7 | Goldman Sachs Group ✦ | 2.13M | +8.2% | $236.11M | 0.0% | ▲ Add | 4 | SEC ↗ ×5 |
| 8 | Federated Hermes, Inc. | 1.79M | +38.8% | $198.27M | 0.3% | ▲ Add | 3 | SEC ↗ ×3 |
| 9 | Geode Capital Management ✦ (passive) | 1.53M | +8.3% | $170.32M | 0.0% | ▲ Add | 9 | SEC ↗ ×2 |
| 10 | Capital Research Global Investors | 1.53M | +37.4% | $170.13M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 11 | Citadel Advisors ✦ | 1.26M | -10.9% | $140.30M | 0.1% | ▼ Trim | 4 | SEC ↗ |
| 12 | Morgan Stanley ✦ | 1.11M | +58.0% | $123.49M | 0.0% | ▲ Add | 4 | SEC ↗ ×8 |
| 13 | Fidelity (FMR) ✦ | 1.03M | -39.3% | $113.90M | 0.0% | ▼ Trim | 5 | SEC ↗ ×4 |
| 14 | Pictet Asset Management Holding SA | 957.78K | +43.6% | $106.25M | 0.1% | ▲ Add | 3 | SEC ↗ |
| 15 | Alliancebernstein L.P. | 894.72K | -1.7% | $77.81M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 16 | Clearbridge Investments, LLC | 696.47K | +14.3% | $77.33M | 0.1% | ▲ Add | 3 | SEC ↗ |
| 17 | Norges Bank ✦ (passive) | 685.84K | New | $76.15M | 0.0% | New | 1 | SEC ↗ |
| 18 | Franklin Resources Inc | 577.03K | -8.0% | $64.07M | 0.0% | ▼ Trim | 3 | SEC ↗ ×4 |
| 19 | Charles Schwab Investment… | 552.74K | +5.0% | $61.37M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 20 | Invesco Ltd. | 543.27K | +49.1% | $60.32M | 0.0% | ▲ Add | 3 | SEC ↗ ×6 |
| 21 | Northern Trust Corp | 540.33K | +8.4% | $59.99M | 0.0% | ▲ Add | 3 | SEC ↗ ×5 |
| 22 | UBS AM, a distinct business unit of… | 514.85K | -4.9% | $57.16M | 0.0% | ▼ Trim | 3 | SEC ↗ ×8 |
| 23 | Wellington Management ✦ | 488.75K | +78.5% | $54.27M | 0.0% | ▲ Add | 9 | SEC ↗ ×7 |
| 24 | Loomis Sayles & Co L P | 434.10K | -6.7% | $48.20M | 0.1% | ▼ Trim | 3 | SEC ↗ ×2 |
| 25 | Squarepoint Ops LLC | 422.92K | +60.8% | $46.96M | 0.1% | ▲ Add | 3 | SEC ↗ |
| 26 | Point72 Asset Management ✦ | 414.21K | -51.1% | $45.99M | 0.1% | ▼ Trim | 3 | SEC ↗ |
| 27 | Ameriprise Financial Inc | 401.63K | +4.6% | $44.59M | 0.0% | ▲ Add | 3 | SEC ↗ ×5 |
| 28 | Adage Capital Partners ✦ | 397.00K | -45.3% | $44.08M | 0.1% | ▼ Trim | 5 | SEC ↗ |
| 29 | Bank of New York Mellon Corp | 394.04K | +34.4% | $43.75M | 0.0% | ▲ Add | 3 | SEC ↗ ×14 |
| 30 | Assenagon Asset Management S.A. | 372.98K | New | $41.41M | 0.0% | New | 1 | SEC ↗ ×2 |
| 31 | Artisan Partners Limited Partnership | 354.82K | -9.2% | $39.40M | 0.1% | ▼ Trim | 3 | SEC ↗ |
| 32 | Bank Of America Corp /De/ | 325.47K | -48.2% | $36.14M | 0.0% | ▼ Trim | 3 | SEC ↗ ×6 |
| 33 | Millennium Management ✦ | 316.72K | -29.9% | $35.17M | 0.0% | ▼ Trim | 8 | SEC ↗ |
| 34 | Voya Investment Management Llc | 272.97K | +16.8% | $30.31M | 0.0% | ▲ Add | 3 | SEC ↗ ×3 |
| 35 | Capital World Investors ✦ | 221.45K | +91.4% | $24.59M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 36 | Duquesne Family Office ✦ | 203.62K | New | $22.61M | 0.5% | New | 1 | SEC ↗ |
| 37 | Nuveen, LLC | 203.08K | +73.0% | $22.55M | 0.0% | ▲ Add | 3 | SEC ↗ ×3 |
| 38 | Bnp Paribas Financial Markets | 197.37K | -20.4% | $21.91M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 39 | Schroder Investment Management Group | 160.52K | +21.9% | $17.66M | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 40 | New York State Common Retirement… | 148.15K | +18.3% | $16.45M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 41 | UBS Group AG | 144.38K | -37.7% | $16.03M | 0.0% | ▼ Trim | 3 | SEC ↗ ×3 |
| 42 | Connor, Clark & Lunn Investment… | 135.87K | -10.5% | $15.09M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 43 | Qube Research & Technologies Ltd | 134.41K | -51.6% | $14.92M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 44 | Deutsche Bank Ag\ | 115.23K | -18.6% | $12.79M | 0.0% | ▼ Trim | 3 | SEC ↗ ×3 |
| 45 | Swiss National Bank | 109.70K | -2.2% | $12.18M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 46 | Aberdeen Group plc | 94.95K | +19.6% | $10.54M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 47 | Russell Investments Group, Ltd. | 86.71K | -25.1% | $9.63M | 0.0% | ▼ Trim | 3 | SEC ↗ ×5 |
| 48 | Neuberger Berman Group LLC | 83.03K | +13.1% | $9.22M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 49 | Wcm Investment Management, Llc | 80.55K | -0.1% | $8.86M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 50 | Rhumbline Advisers | 73.33K | +5.0% | $8.14M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 51 | Wells Fargo & Company/Mn | 72.15K | +111.5% | $8.01M | 0.0% | ▲ Add | 3 | SEC ↗ ×4 |
| 52 | Prudential Financial Inc | 69.14K | +129.0% | $7.68M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 53 | Renaissance Technologies ✦ | 68.28K | -73.5% | $7.58M | 0.0% | ▼ Trim | 6 | SEC ↗ |
| 54 | AQR Capital Management ✦ | 59.21K | -0.1% | $6.57M | 0.0% | ▼ Trim | 9 | SEC ↗ ×6 |
| 55 | Citigroup Inc | 58.35K | +373.0% | $6.48M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 56 | Raymond James Financial Inc | 58.07K | +16.3% | $6.45M | 0.0% | ▲ Add | 3 | SEC ↗ ×4 |
| 57 | Manufacturers Life Insurance… | 57.17K | +12.6% | $6.35M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 58 | Man Group plc | 50.79K | +1162.8% | $5.64M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 59 | Canada Pension Plan Investment Board | 47.40K | New | $5.26M | 0.0% | New | 1 | SEC ↗ |
| 60 | Legal & General Group Plc | 43.91K | -6.6% | $4.88M | 0.0% | ▼ Trim | 3 | SEC ↗ ×3 |
| 61 | BNP Paribas Asset Management… | 41.93K | -4.4% | $4.66M | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
| 62 | Td Asset Management Inc | 38.78K | 0.0% | $4.31M | 0.0% | Held | 3 | SEC ↗ |
| 63 | First Trust Advisors Lp | 32.48K | -62.0% | $3.61M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 64 | State Of Wisconsin Investment Board | 32.19K | -12.0% | $3.57M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 65 | D. E. Shaw & Co. ✦ | 30.17K | -7.6% | $3.35M | 0.0% | ▼ Trim | 8 | SEC ↗ ×2 |
| 66 | MIRAE ASSET GLOBAL ETFS HOLDINGS… | 29.16K | -15.9% | $3.23M | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
| 67 | Creative Planning | 25.84K | +22.5% | $2.87M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 68 | Zurcher Kantonalbank (Zurich… | 23.11K | +48.1% | $2.57M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 69 | Sei Investments Co | 22.09K | -45.7% | $2.45M | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
| 70 | Captrust Financial Advisors | 19.95K | +9.9% | $2.21M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 71 | Dimensional Fund Advisors Lp | 18.97K | -0.9% | $2.11M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 72 | Lazard Asset Management Llc | 18.32K | -44.3% | $2.03M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 73 | State Board Of Administration Of… | 15.34K | +4.7% | $1.70M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 74 | Tudor Investment Corp Et Al | 13.89K | -29.3% | $1.54M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 75 | Barclays Plc | 13.21K | +24.0% | $1.47M | 0.0% | ▲ Add | 3 | SEC ↗ ×4 |
| 76 | Stifel Financial Corp | 12.69K | +2.8% | $1.41M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 77 | Jones Financial Companies Lllp | 12.07K | +145.3% | $1.33M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 78 | Mackenzie Financial Corp | 10.94K | New | $1.21M | 0.0% | New | 1 | SEC ↗ |
| 79 | ProShare Advisors LLC | 9.48K | -11.6% | $1.05M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 80 | Universal- Beteiligungs- und… | 9.39K | -85.1% | $1.04M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 81 | Marshall Wace ✦ | 8.17K | -15.1% | $907,560 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 82 | Victory Capital Management Inc | 7.68K | -62.5% | $852,599 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 83 | Pnc Financial Services Group, Inc. | 7.66K | +10.4% | $850,156 | 0.0% | ▲ Add | 3 | SEC ↗ ×4 |
| 84 | LPL Financial LLC | 6.28K | +1.4% | $697,713 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 85 | Rockefeller Capital Management L.P. | 5.95K | +22.7% | $660,073 | 0.0% | ▲ Add | 3 | SEC ↗ ×3 |
| 86 | Gotham Asset Management ✦ | 5.52K | +13.8% | $612,441 | 0.0% | ▲ Add | 9 | SEC ↗ |
| 87 | Two Sigma Investments ✦ | 4.60K | +7.0% | $510,738 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 88 | Susquehanna International Group, Llp | 4.37K | -91.4% | $485,423 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 89 | Fifth Third Bancorp | 4.29K | -18.4% | $476,364 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 90 | Principal Financial Group Inc | 4.22K | -25.1% | $468,547 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 91 | Mitsubishi UFJ Trust & Banking Corp | 3.86K | New | $428,576 | 0.0% | New | 1 | SEC ↗ |
| 92 | Quantinno Capital Management LP | 3.84K | -0.3% | $426,133 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 93 | Envestnet Asset Management Inc | 3.77K | New | $418,472 | 0.0% | New | 1 | SEC ↗ |
| 94 | Ensign Peak Advisors, Inc | 3.71K | -3.9% | $411,810 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 95 | Simplex Trading, Llc | 3.44K | New | $381,388 | 0.0% | New | 1 | SEC ↗ |
| 96 | Amundi | 3.42K | -14.8% | $379,945 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 97 | Cerity Partners LLC | 3.14K | -2.4% | $348,300 | 0.0% | ▼ Trim | 3 | SEC ↗ ×3 |
| 98 | Mirae Asset Global Investments Co.… | 3.07K | -13.9% | $340,640 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 99 | CIBC Bancorp USA Inc. | 3.05K | +14.5% | $338,419 | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 100 | Capstone Investment Advisors, Llc | 3.00K | New | $333,645 | 0.0% | New | 1 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Norges Bank | $76.15M | 0.0% |
| Assenagon Asset Management… | $41.41M | 0.0% |
| Duquesne Family Office | $22.61M | 0.5% |
| Canada Pension Plan… | $5.26M | 0.0% |
| Mackenzie Financial Corp | $1.21M | 0.0% |
| Mitsubishi UFJ Trust &… | $428,576 | 0.0% |
| Envestnet Asset Management Inc | $418,472 | 0.0% |
| Simplex Trading, Llc | $381,388 | 0.0% |
| Capstone Investment Advisors… | $333,645 | 0.0% |
Exited
| Balyasny Asset Management L.P. | $4.61M | was 0.0% |
| Alyeska Investment Group, L.P. | $2.83M | was 0.0% |
| Hsbc Holdings Plc | $1.22M | was 0.0% |
| HighTower Advisors, LLC | $787,774 | was 0.0% |
| IMC-Chicago, LLC | $582,438 | was 0.0% |
| Bank Of Montreal /Can/ | $330,574 | was 0.0% |
| Toronto Dominion Bank | $522 | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 284 holders, 72.02M shares, $6.12B reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
Frequently co-owned
What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.
Open-market purchases (P)
No open-market insider purchases in our coverage window.
Open-market sales (S)
Sep 14
Meeker David P
Officer, Director · 1.82K sh · $189,965
Sep 14
Meeker David P
Officer, Director · 8.70K sh · $899,634
Sep 14
Meeker David P
Officer, Director · 30.75K sh · $3.15M
Sep 14
Meeker David P
Officer, Director · 6.44K sh · $655,145
Sep 14
Meeker David P
Officer, Director · 2.30K sh · $241,937
Aug 31
Smith Hunter C
Officer · 11.51K sh · $1.21M
Aug 31
Smith Hunter C
Officer · 23.07K sh · $2.41M
Aug 31
Smith Hunter C
Officer · 28.19K sh · $2.99M
Aug 13
Garfield Alastair
Officer · 2.01K sh · $233,031
Aug 13
Garfield Alastair
Officer · 1.56K sh · $182,170
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology
Provenance: Ownership from parsed 13F common-stock positions (tracked universe, comparable sets for changes); insider rows from Forms 3/4/5; stakes from Schedules 13D/13G; every filing links to its original on SEC EDGAR.
Reporting period: Q2 2026 ·
Methodology ·
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