RA CAPITAL MANAGEMENT, L.P. - 30 Jun 2025 SCHEDULE 13G/A Report for RHYTHM PHARMACEUTICALS, INC. Common Stock, $0.001 par value per share (RYTM)

Filing Manager
RA CAPITAL MANAGEMENT, L.P.
Reporting Manager
RA Capital Management, L.P.
Security
RHYTHM PHARMACEUTICALS, INC. Common Stock, $0.001 par value per share
Symbol
RYTM
Shares outstanding
63,923,667 shares
Disclosed Ownership
5,561,359 shares
Ownership
8.7%
Form type
SCHEDULE 13G/A
Filing time
14 Aug 2025, 18:04:34 UTC
Date of event
30 Jun 2025
Next filing
17 Feb 2026
SEC
View on sec.gov

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Quoteable Key Fact

"RA CAPITAL MANAGEMENT, L.P. disclosed 8.7% ownership in RHYTHM PHARMACEUTICALS, INC. Common Stock, $0.001 par value per share (RYTM) on 30 Jun 2025."

Quick Takeaways

  • RA CAPITAL MANAGEMENT, L.P. filed SCHEDULE 13G/A for RHYTHM PHARMACEUTICALS, INC. Common Stock, $0.001 par value per share (RYTM).
  • Disclosed ownership: 8.7%.
  • Date of event: 30 Jun 2025.

What Changed

  • No earlier schedule filing is available for direct comparison.
  • Current filing was accepted on 14 Aug 2025, 18:04.

Why This Matters

  • This page explains what this Schedule 13D/13G filing tells you before manager-level rows.
  • You can verify ownership claims directly against the original SEC filing.

Source Evidence

Backed by Schedule 13D/13G

Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.

See Original Filing

Reporting Managers (4)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
RA Capital Management, L.P. 8.7% 5,561,359 0 5,561,359 /s/ Peter Kolchinsky By Peter Kolchinsky, Authorized Signatory
Peter Kolchinsky 8.7% 5,561,359 0 5,561,359 /s/ Peter Kolchinsky Peter Kolchinsky
Rajeev Shah 8.7% 5,561,359 0 5,561,359 /s/ Rajeev Shah Rajeev Shah
RA Capital Healthcare Fund, L.P. 8.7% 5,561,359 0 5,561,359 /s/ Peter Kolchinsky By RA Capital Healthcare Fund GP, LLC, its General Partner, By Peter Kolchinsky, Manager

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