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SEC Form 4 research

Ultragenyx Pharmaceutical Inc. insider transactions

Inspect Ultragenyx Pharmaceutical Inc.'s public SEC insider acquisitions and sales, reporting owners and source receipts.

As of 2026-10-14T07:26:40.310Z

Issuer CIK
0001515673
Reporting owners
31
Officers and directors
18
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What is a Form 4?

Animation: what a Form 4 is, shown with one real example. Sonic Automotive (SAH) reporting owner Paul P. Rusnak bought 13,701 shares at $59.78 on Wednesday, October 7, 2026, transaction code P, an open-market purchase (S is a sale and A is an award from the company). A timeline marks the SEC's two-business-day filing deadline, which ends Friday, October 9. The SEC accepted the Form 4 at 4:33:21 PM ET on October 9, and NexusTrade treats it as public one minute later, at 4:34:21 PM ET. A lamp for NexusTrade's InsiderTrades indicator stays off from the trade date until that moment, then counts one purchase worth 13,701 × $59.78 = $819,045.78.
In this example the shares were bought on Oct 7, 2026, and NexusTrade's InsiderTrades indicator can count the purchase starting at 4:34:21 PM ET on Oct 9, one minute after the SEC accepted the Form 4.

A Form 4 is the SEC filing a company insider, such as an officer, director or 10% owner, uses to report a trade in the company's stock, generally within two business days. The animation follows one real filing as an example: Paul P. Rusnak's purchase of Sonic Automotive (SAH) shares on October 7, 2026.

The same reading applies to every row on this page. The trade date is when the shares changed hands. The available date is when NexusTrade treats the filing as public, and a NexusTrade InsiderTrades indicator counts a purchase (code P) or sale (code S) only from that moment. Code A awards are not counted as purchases.

Read one actual disclosure before using it

Show the table · 1 row, 7 columns

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2026-09-152026-09-15Huizenga Theodore AlanS1,283$13.57Not reported

First displayed source row from Recent insider disclosures. The full bounded history and coverage notes remain below.

The displayed observation date is 2026-09-15 and its public availability date is 2026-09-15. Subtracting those calendar dates gives 0 days of disclosure lag. Historical public research can use the record from the availability date, rather than backdating knowledge to the observation date. The calendar-day difference does not assert an intraday publication time.

This row is code S: a sale. A purchase-following rule excludes this sale even if the reported dollar amount is large.

Open the linked original receipts to verify the row, then inspect a second record before drawing a pattern. This public filing observation supplies source evidence, not a completed copy-trading return.

SEC accession 0001193125-26-392233 ↗SEC accession 0001193125-26-384878 ↗SEC accession 0001193125-26-332547 ↗

Recent insider disclosures

This table includes purchases, sales and awards in the public filing record. Awards and open-market purchases are distinct transaction codes. For historical research, use the public availability date to determine when the transaction was knowable.

Read code P as a purchase, S as a sale and A as an award. An award is an acquisition, but it is not an open-market purchase. Open the filing receipt to check the transaction details.

Show the table · 4 rows, 7 columns

Scroll sideways to compare all columns. Select a heading to sort.

2026-09-152026-09-15Huizenga Theodore AlanS1,283$13.57Not reported
2026-09-082026-09-03Huizenga Theodore AlanS161$13.99Not reported
2026-08-052026-08-03Parschauer Karah HerdmanS1,900$24.92Not reported
2026-08-052026-08-03Horn HowardS4,696$24.92Not reported

Most recent 90-day source activity, up to 50 rows. No rows means no matching recent records, not no historical activity.

Officers and directors in the directory

Inspect all 18 displayed rows: Officers and directors in the directory

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SIEGALL CLAY B0001167496435
Horn Howard000178633526
Sanders Corazon (Corsee) D.00017965367
Fust Matthew K000139726653
SULIMAN SHEHNAAZ000171307018
Bedrosian Camille L000132696920
Sharp Shalini000137720267
Pinion John Richard000164809612
Harris Erik000178011319
Dier Mardi000157459163
AGARWAL SUNIL000161664021
Aliski William000159842619
Crombez Eric000165305211
Huang Dennis Karl00016412177
Huizenga Theodore Alan000160334740
KAKKIS EMIL D0001248093222
Kassberg Thomas Richard000130381134
Parschauer Karah Herdman000167745538
SIEGALL CLAY B ↗Horn Howard ↗Sanders Corazon (Corsee) D. ↗Fust Matthew K ↗SULIMAN SHEHNAAZ ↗Bedrosian Camille L ↗Sharp Shalini ↗Pinion John Richard ↗Harris Erik ↗Dier Mardi ↗AGARWAL SUNIL ↗Aliski William ↗Crombez Eric ↗Huang Dennis Karl ↗Huizenga Theodore Alan ↗KAKKIS EMIL D ↗Kassberg Thomas Richard ↗Parschauer Karah Herdman ↗

Which transactions qualify for the company tracker

The company strategy uses verified officers and directors with qualifying acquisitions at this issuer. Other reporting owners may appear in source records without becoming strategy signals.

The source profile remains readable even when the issuer does not meet the company-strategy eligibility rules.

Historical follower simulations are separate from these source transactions. They do not establish live trading results.