SCHEDULE 13G/A

ITEOS THERAPEUTICS INC

Common Stock · CUSIP: 46565G104

Event date: 2025-05-13

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, LLC

  Shares: 5,730,000.00 · Class: 14.9%

• Oleg Nodelman

  Shares: 5,730,000.00 · Class: 14.9%

• EcoR1 Capital Fund Qualified, L.P.

  Shares: 5,371,661.00 · Class: 14.0%

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