Transaction · 0001193125-26-384878

Huizenga Theodore Alan

Huizenga Theodore Alan, SVP, CAO, reported an open-market or private sale at Ultragenyx Pharmaceutical Inc. involving 161.000000 shares for an estimated $2252.39. Reported holdings after the transaction were 69146.000000 shares. A 10b5-1 reference was not detected in the stored filing text.

Open-market sellSEC transaction code SSVP, CAO
RAREUltragenyx Pharmaceutical Inc.
Filing timeSep 08
Trade dateSep 03, 2026
Filing · SECView on SEC
InsiderProfile

Price performance since filing

Close on the filing date, the pre-filing context, and the forward return at standard windows
Price at filing
$26.67
Pre-filing
1mo ago -3.2%1w ago +0.0%1d ago +0.0%
Returns since
7d +0.0%30d +0.0%90d +0.0%180d +0.0%1y +0.0%

RARE price since this filing

30 days of pre-filing context and vertical markers at the filing date plus 7d / 30d / 90d / 180d / 1y afterwards
RARE since 2026-09-08Filed yesterday · 1 day of post-filing data
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Filing datePost-filing windows (7d, 30d, 90d, 180d, 1y)30 days of pre-filing context

Transaction facts

Stored Form 4 columns with their raw values

Non-derivative
Type
Sell
Code S
Identifier
0001193125-26-384878
Common Stock
Transaction date
Sep 03, 2026
Filed Sep 08, 2026, 04:29 PM · 5d delay
Shares
161 sh
$1.39k per share
Estimated value
-$225k
Computed from shares × price
Holdings after
69.1k sh
Direct

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $10.0MLarge $100M
Direct Ownership
+6score
Filing-only score

+6

Compact filing score computed from stored Form 4 facts. Version v1.

Positive filing signal

This filing has a modest positive filing-only score. Treat it as a useful flag for review, not as a buy signal.

Reported relationships & other filings

Form 4 relationship flags and nearby filing context

Reported roles

SVP, Chief Accounting Officer

Officer YesDirector No10% NoOther No
Footnotes & amended
  1. F1

    Represents shares sold to pay required tax withholdings due to the vesting of RSUs.

  2. F2

    Includes 396 shares acquired under the Company's Amended and Restated Employee Stock Purchase Place on April 30, 2026.

  3. F3

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

Original filing · 0001193125-26-384878
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