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RYTM
5 quarters

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

Quarter-by-Quarter History
QuarterActionSharesChangeValueWeightPriceConviction
2026-Q1
Latest
Increased
1.9M
+52.2%
$167.8M0.7%$89.56
60
2025-Q4
Increased
1.3M
+18.5%
$135.6M0.6%$106.76
50
2025-Q3
Decreased
1.1M
-34.4%
$108M0.5%$100.64
0
2025-Q2
Increased
1.6M
+21.5%
$103M0.4%$62.73
43
2025-Q1
New
1.3M
-
$71M0.3%$54.80
49

Other major holders of RYTM: RA CAPITAL MANAGEMENT, L.P., BlackRock, Inc., VANGUARD GROUP INC, BAKER BROS. ADVISORS LP

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