Howard Horn - 02 Feb 2026 Form 4 Insider Report for Ultragenyx Pharmaceutical Inc. (RARE)

Signature
/s/ Karah Parschauer, attorney-in-fact
Issuer symbol
RARE
Transactions as of
02 Feb 2026
Net transactions value
-$72,117
Form type
4
Filing time
03 Feb 2026, 12:00:41 UTC
Previous filing
05 Jan 2026
Next filing
03 Mar 2026

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Horn Howard Chief Financial Officer C/O ULTRAGENYX PHARMACEUTICAL INC., 60 LEVERONI COURT, NOVATO /s/ Karah Parschauer, attorney-in-fact 03 Feb 2026 0001786335

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction RARE Common Stock Sale $72,117 -3,061 -3.3% $23.56 88,935 02 Feb 2026 Direct F1
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.

Transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c).

Explanation of Responses:

Id Content
F1 Includes previously reported shares of common stock underlying RSUs granted to the Reporting Person, which are subject to certain vesting conditions.