SCHEDULE 13G

Ultragenyx Pharmaceutical Inc

COMMON STOCK · CUSIP: 90400D108

Event date: 2026-09-30

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

• STATE STREET CORPORATION

  Shares: 7,538,078.00 · Class: 7.6%

• SSGA FUNDS MANAGEMENT, INC.

  Shares: 5,318,630.00 · Class: 5.4%

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