VANGUARD PORTFOLIO MANAGEMENT LLC - 31 Mar 2026 SCHEDULE 13G Report for Ultragenyx Pharmaceutical Inc Common Stock (RARE)

Filing manager: VANGUARD PORTFOLIO MANAGEMENT LLC
Reporting owner: Vanguard Portfolio Management
Security: Ultragenyx Pharmaceutical Inc Common Stock
Beneficially owned shares: 5,410,208 shares
Class ownership: 5.5%
Large-stake signal: Form
SCHEDULE 13G
Passive or exempt beneficial ownership filing.
Ownership
5.5%
Beneficial ownership of this reported class.
Shares
5,410,208 shares
Shares beneficially owned as disclosed.
Event date
31 Mar 2026
Date tied to the ownership event or amendment.
Accepted by SEC
29 Apr 2026
EDGAR acceptance date.
How to read this large-stake filing
Schedule 13D/G filings focus on beneficial ownership stakes, not a full portfolio.
Compare this filing with the holder history and issuer page before treating the percentage as a current position.
Use amendments to understand whether the disclosed stake increased, decreased, or changed reporting status.
Symbol: RARE
Shares outstanding: 98,367,418 shares
Form type: SCHEDULE 13G
Accepted by SEC: 29 Apr 2026, 15:48:02 UTC
Event date: 31 Mar 2026
SEC filing: View on sec.gov

Key filing fact

VANGUARD PORTFOLIO MANAGEMENT LLC disclosed 5.5% ownership in Ultragenyx Pharmaceutical Inc Common Stock (RARE) on 31 Mar 2026.

Key facts

VANGUARD PORTFOLIO MANAGEMENT LLC filed SCHEDULE 13G for Ultragenyx Pharmaceutical Inc Common Stock (RARE).
Disclosed ownership: 5.5%.
Date of event: 31 Mar 2026.

This page turns one Schedule 13D/G filing into a quick large-stake read before the raw reporting-person rows.
Use the linked SEC filing as the source of truth for ownership percentages, shares, and reporting-party details.

Backed by Schedule 13D/13G

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

Reporting persons

Names, ownership percentages, voting power, signatures, titles, and CIKs as disclosed in this Schedule 13D/G filing.

Name	Ownership	Shares owned	Sole voting power	Shared voting power	Signature	Title	CIK
Vanguard Portfolio Management	5.5%	5,410,208	24,216	0	Ashley Grim	Head of Global Fund Administration

CIK / CUSIP context first

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