SCHEDULE 13G/A

DIANTHUS THERAPEUTICS INC COM

Common Stock, $0.001 par value · CUSIP: 252828108

Event date: 2025-09-30

Reporting persons may disclose overlapping interests. Their amounts are shown individually and are not added into a filing total.

Filing-level shares

Unavailable

Percent of class

Unavailable

• Octagon Capital Advisors LP

  Shares: 2,416,667.00 · Class: 6.1%

• Octagon Investments Master Fund LP

  Shares: 2,125,000.00 · Class: 5.3%

• Octagon Private Opportunities Fund II LP

  Shares: 291,667.00 · Class: 0.7%

• Ting Jia

  Shares: 2,416,667.00 · Class: 6.1%

Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.