RARE
ULTRAGENYX PHARMACEUTICAL INC.Marquee-fund ownership over time
This quarter's activity
New positions opened
Positions exited
None.
Current holders
Sorted by tenure (longest first)| Fund | First disclosed | Held | Entry price | Latest close | Return on entry |
|---|---|---|---|---|---|
| Citadel Advisors | Q3 2024(8Q snapshot) | 7Q | $52 | $24 | -53% |
| Two Sigma Investments | Q3 2024(8Q snapshot) | 7Q | $52 | $24 | -53% |
| D.E. Shaw | Q3 2024(8Q snapshot) | 7Q | $52 | $24 | -53% |
| AQR Capital Management | Q3 2024(8Q snapshot) | 7Q | $52 | $24 | -53% |
| Millennium Management | Q3 2024(8Q snapshot) | 7Q | $52 | $24 | -53% |
| Point72 Asset Management re-entered | Q3 2024(8Q snapshot) | 7Q | $52 | $24 | -53% |
| Renaissance Technologies | Q4 2024(8Q snapshot) | 6Q | $49 | $24 | -50% |
“Return on entry” is the price-only move from the fund's first disclosure to today — it ignores any adds, trims, or dividends. A fund that built its position over multiple quarters has a true cost basis somewhere between entry price and latest close; this figure is the upper bound.
Past holders
Funds that exited at some point| Fund | Last entry | Exited | Entry → Exit | Return |
|---|---|---|---|---|
| Duquesne Family Office | Q4 2024 | Q3 2025 | → $30 | -38% |
| Bridgewater Associates | Q2 2023 | Q2 2024 | → $41 | -13% |
| Maverick Capital | Q2 2021 | Q1 2022 | → $71 | -35% |
| JANA Partners | Q4 2016 | Q2 2017 | → $59 | -28% |
Insider activity
Form 4 — officers, directors, 10%+ ownersFiled within two business days of each transaction by anyone with material insider status at Ultragenyx Pharmaceutical Inc.. Pair with the holders table above as a sanity check: heavy insider buying alongside marquee-fund accumulation is the strongest accumulation signal; heavy insider selling alongside fund exits is the strongest distribution signal.
30d / 90d windows measured from Jun 1, 2026 — the most recent Form 4 on file — not from today.
- Form 40001786335-26-000002Jun 1, 2026
- Form 40001397266-26-000002May 18, 2026
- Form 40001713070-26-000002May 18, 2026
- Form 40001924797-26-000002May 18, 2026
- Form 40001796536-26-000004May 18, 2026
- Form 40001380022-26-000002May 18, 2026
- Form 40001193125-26-229224May 18, 2026
- Form 40001193125-26-229222May 18, 2026
- Form 40001193125-26-208632May 6, 2026
- Form 40001193125-26-204402May 4, 2026
- Form 40001193125-26-177470Apr 24, 2026
- Form 40001193125-26-164308Apr 20, 2026
- Form 40001193125-26-164297Apr 20, 2026
- Form 40001193125-26-164289Apr 20, 2026
- Form 40001193125-26-164281Apr 20, 2026
Fundamentals
XBRL · ULTRAGENYX PHARMACEUTICAL INC.Annual figures sourced directly from ULTRAGENYX PHARMACEUTICAL INC.'s 10-K / 10-Q filings via SEC EDGAR XBRL. Latest fiscal year and the year-over-year change, with up to ten years of history.
Recent SEC filings
10-K · 10-Q · 8-K · 13D/G · proxyThe most recent material filings for Ultragenyx Pharmaceutical Inc. — earnings, material events, ownership disclosures, proxy statements. Form 4 insider activity is shown in the panel above.
- 8-KMaterial eventMay 18, 2026
- 10-QQuarterly reportMay 6, 2026
- 8-KMaterial eventMay 5, 2026
- 8-KMaterial eventApr 2, 2026
- 8-KMaterial eventMar 30, 2026
- DEF 14ADEFINITIVE PROXY STATEMENTMar 27, 2026
- 8-KMaterial eventMar 12, 2026
- 8-KMaterial eventFeb 23, 2026
- 10-KAnnual reportFeb 18, 2026
- 8-KMaterial eventFeb 12, 2026
- 8-KMaterial eventFeb 3, 2026
- 8-KMaterial eventJan 30, 2026
- 8-KMaterial eventJan 12, 2026
- 8-KMaterial eventDec 30, 2025
- 8-KMaterial eventDec 29, 2025
Trade history
Every open→close lifecycle across tracked funds| Fund | Open date | Close date | Open price | Close price / current | Return |
|---|---|---|---|---|---|
| Point72 Asset Management | Q2 2026 | open | $25 | $24 | -3% |
| Duquesne Family Office | Q4 2024 | Q3 2025 | $48 | $30 | -38% |
| Renaissance Technologies | Q4 2024 | open | $49 | $24 | -50% |
| Citadel Advisors | Q3 2024 | open | $52 | $24 | -53% |
| Two Sigma Investments | Q3 2024 | open | $52 | $24 | -53% |
| D.E. Shaw | Q3 2024 | open | $52 | $24 | -53% |
| AQR Capital Management | Q3 2024 | open | $52 | $24 | -53% |
| Millennium Management | Q3 2024 | open | $52 | $24 | -53% |
| Point72 Asset Management | Q3 2024 | Q4 2025 | $52 | $33 | -36% |
| Bridgewater Associates | Q2 2023 | Q2 2024 | $47 | $41 | -13% |
| Maverick Capital | Q2 2021 | Q1 2022 | $110 | $71 | -35% |
| JANA Partners | Q4 2016 | Q2 2017 | $82 | $59 | -28% |
- Covers only the 27 marquee funds tracked here, not the full institutional universe. A “0 holders” reading does not mean unowned.
- Heavy funds (Renaissance Technologies, Citadel Advisors, Soros Fund Management, Two Sigma Investments, D.E. Shaw, AQR Capital Management, Millennium Management, Point72 Asset Management) use 8-quarter snapshots, so their pre-2024 history is missing.
- “Current” reflects each fund's most recent 13F — filings lag the actual trade by up to 45 days; positions shown may have changed since.
- Cost = price at the entry filing date. Re-entered positions show the most recent open lot.
- Options, ADRs, and unmapped CUSIPs are excluded from the follower-backtest pipeline that produces these snapshots, so certain holding types won't appear here.