Public ownership evidence

Ultragenyx Pharmaceutical Inc. (RARE) Ownership Disclosures

Read RARE insider transactions, institutional 13F filings and Congressional disclosures with report dates, public availability and original receipts.

As of 2026-10-10T12:08:28.848Z

Separate the three disclosure sources

Step 1 of 3

Recent Form 4 activity

Ultragenyx Pharmaceutical Inc.: source evidence dated 2026-10-10T12:08:28.848Z.

Available
2026-09-15
Trade date
2026-09-15
Reporting owners
Huizenga Theodore Alan
Code
S
Shares
1,283
Reported value
Not reported
What you should see

The displayed owner or issuer and source fields identify the receipt to verify; keep reporting and availability dates separate.

Step 2 of 3

Is this an insider transaction, 13F holding, or Congressional event?

Each source has different dates and units. Raw ticker-matched receipts, including amendments, are not deduplicated current ownership totals.

SEC 0001193125-26-392233
What you should see

Follow the source receipt or manager/member profile. Avoid combining transaction value and 13F position value into an ownership percentage.

Step 3 of 3

Read RARE fundamentals

Follow the source receipt or manager/member profile. Avoid combining transaction value and 13F position value into an ownership percentage.

Read RARE fundamentals
What you should see

Keep reporting dates and units beside the answer, and inspect its original citations.

Recent Form 4 activity

See the complete recent form 4 activity

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2026-09-152026-09-15Huizenga Theodore AlanS1,283Not reported
2026-09-082026-09-03Huizenga Theodore AlanS161Not reported
2026-08-052026-08-03Parschauer Karah HerdmanS1,900Not reported
2026-08-052026-08-03Horn HowardS4,696Not reported

90-day public availability window, up to 50 records.

Recent institutional filing receipts

These are raw ticker-matched positions in recent 13F receipts, including amendments. They are not deduplicated current ownership totals. Open the manager profile to inspect its effective filing book.

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Advisors Asset Management, Inc.2020-06-302026-08-287,376$576,951None
Corient Private Wealth LP2026-06-302026-08-28146,493$4,891,402None
Advisors Asset Management, Inc.2019-12-312026-08-2613,487$576,030None
VIRGINIA RETIREMENT SYSTEMS ET Al2026-03-312026-08-2626,719$559,763None
VIRGINIA RETIREMENT SYSTEMS ET Al2026-06-302026-08-2631,019$1,035,724None
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM2026-06-302026-08-25101,471$3,388,117None
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM2026-06-302026-08-253,388,117$101,471,000None
Advisors Asset Management, Inc.2020-03-312026-08-2212,819$569,548None
Assenagon Asset Management S.A.2026-06-302026-08-22120,864$4,035,649None
Palo Alto Investors LP2026-06-302026-08-20596,495$19,916,968None
CANTOR FITZGERALD, L. P.2026-06-302026-08-2019,924$665,262None
MERCER GLOBAL ADVISORS INC /ADV2026-06-302026-08-2071,092$2,373,458None
Palo Alto Investors LP2026-06-302026-08-19596,495$19,916,968None
Advisors Asset Management, Inc.2019-03-312026-08-1915,151$1,050,873None
Advisors Asset Management, Inc.2019-09-302026-08-1913,886$594,043None
Advisors Asset Management, Inc.2019-06-302026-08-1914,696$933,196None
Ensign Peak Advisors, Inc2026-03-312026-08-196,721$140,805None
Ensign Peak Advisors, Inc2025-12-312026-08-19250,571$5,763,133None
Ensign Peak Advisors, Inc2025-09-302026-08-19177,421$5,336,824None
Fulcrum Asset Management LLP2026-06-302026-08-19112$3,436None
Palo Alto Investors LP2026-06-302026-08-18596,495$19,916,968None
Corient Private Wealth LP2026-06-302026-08-18139,094$4,644,350None
Transamerica Financial Advisors, LLC2026-06-302026-08-18113$3,773None
Stonepine Capital Management, LLC2026-06-302026-08-18200,000$5,500,000Call
Stonepine Capital Management, LLC2026-06-302026-08-1825,000$834,750None
CAPSTONE INVESTMENT ADVISORS, LLC2026-06-302026-08-1816,457$549,499None
Jefferies Financial Group Inc.2026-06-302026-08-18929,626$31,040,212None
MCGUIRE CAPITAL ADVISORS INC2026-06-302026-08-15100$3,339None
Ishara Investments LP2026-06-302026-08-15205,000$6,844,950None
FLAX POND CAPITAL, LLC2026-06-302026-08-1556,838$1,897,821None
Odyssean, LLC2026-06-302026-08-15122,087$4,076,485None
SMA Capital LLC2026-06-302026-08-15310$10,351None
TORONTO DOMINION BANK2026-06-302026-08-15415,000$13,856,850None
SummitTX Capital, L.P.2026-06-302026-08-15374,270$12,496,875None
Squadron Capital Management LLC2026-06-302026-08-1555,000$1,836,450Call
SEI INVESTMENTS CO2026-06-302026-08-15211,710$7,068,997None
SEI INVESTMENTS CO2026-06-302026-08-15123$4,090None
Aster Capital Management (DIFC) Ltd2026-06-302026-08-15259$8,648None
Federation des caisses Desjardins du Quebec2026-06-302026-08-15300$10,017None
JPL Wealth Management, LLC2026-06-302026-08-1559$1,971None
Rafferty Asset Management, LLC2026-06-302026-08-15101,655$3,394,260None
Marex Group Ltd2026-06-302026-08-1510,296$343,783None
Basecamp Wealth Advisors LLC2026-06-302026-08-1538$1,269None
Quarry LP2026-06-302026-08-1525,000$834,750None
Catalio Capital Management, LP2026-06-302026-08-15316,252$10,559,654None
ADAR1 Capital Management, LLC2026-06-302026-08-1520,000$667,800Call
XTX Topco Ltd2026-06-302026-08-1538,521$1,286,216None
Aquatic Capital Management LLC2026-06-302026-08-1516,760$559,616None
CHARLES SCHWAB INVESTMENT MANAGEMENT INC2026-06-302026-08-15760,039$25,377,702None
Sixth Street Partners Management Company, L.P.2026-06-302026-08-15760,039$25,377,702None

90-day public filing window, up to 50 source positions.

Advisors Asset Management, Inc. ↗Corient Private Wealth LP ↗Advisors Asset Management, Inc. ↗VIRGINIA RETIREMENT SYSTEMS ET Al ↗VIRGINIA RETIREMENT SYSTEMS ET Al ↗CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM ↗CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM ↗Advisors Asset Management, Inc. ↗Assenagon Asset Management S.A. ↗Palo Alto Investors LP ↗

Recent Congressional disclosures

No matching Congressional transactions were returned in this source preview.

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No records are available for this view.

Bounded public source preview, up to 25 disclosed events.

How to read the disclosure dates

The tables report different things: insider transactions, institutional positions and Congressional transaction ranges. Read each table with its source dates and units. They cannot be added into a combined ownership percentage.

  1. Company insiders

    SEC Form 4 purchases, sales and awards report transactions and their public filing availability.

  2. Institutional managers

    13F reports disclose delayed quarter-end positions. They are not a record of trades between quarters.

  3. Congressional filers

    Periodic transaction reports disclose transaction dates and amount brackets. Public filing dates determine what researchers could know.

Institutional source directory ↗Congressional source directory ↗

Read the transaction codes

Awards use transaction code A, purchases P and sales S. An acquisition from an award is not the same as an open-market purchase. Joint filers may share a transaction. Use original receipts and availability dates to interpret the events.

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