Position history for WESTFIELD CAPITAL MANAGEMENT CO LP's holdings in RHYTHM PHARMACEUTICALS INC
WESTFIELD CAPITAL MANAGEMENT CO LP holds 1.9M shares of RYTM (RHYTHM PHARMACEUTICALS INC), worth $167.8M as of 2026-Q1. The position was increased (+52.2% shares). RYTM represents 0.7% of WESTFIELD CAPITAL MANAGEMENT CO LP's portfolio.
Current Value
$167.8M
Current Shares
1.9M
Total Value Change
+$96.7M
Total Shares Change
+588,031
Other major holders of RYTM: BNP PARIBAS FINANCIAL MARKETS, UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC, RA CAPITAL MANAGEMENT, L.P.
Increased |
| 1.9M |
+52.2% |
| $167.8M |
| 0.7% |
| $89.56 |
60 |
| 2025-Q4 | Increased | 1.3M | +18.5% | $135.6M | 0.6% | $106.76 | 50 |
| 2025-Q3 | Decreased | 1.1M | -34.4% | $108M | 0.5% | $100.64 | 0 |
| 2025-Q2 | Increased | 1.6M | +21.5% | $103M | 0.4% | $62.73 | 43 |
| 2025-Q1 | New | 1.3M | - | $71M | 0.3% | $54.80 | 49 |