SCHEDULE 13D

ITEOS THERAPEUTICS INC

Common Stock · CUSIP: 46565G104

Event date: 2025-05-15

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

• EcoR1 Capital, LLCReported CIK 0001587114

  Shares: 10,688,978.00 · Class: 27.9%

• Oleg NodelmanReported CIK 0001454385

  Shares: 10,688,978.00 · Class: 27.9%

• EcoR1 Capital Fund Qualified, L.P.Reported CIK 0001598292

  Shares: 10,020,210.00 · Class: 26.2%

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