RARE — Ultragenyx Pharmaceutical Inc.Today's name, from the SEC's present-day ticker list — a present-day mapping, not the name as of each filing.

Congress trades
5
all time
Members · 12m
1
3 buys · 0 sells · by trade date
Latest filing
10-12
2026-10-12
Rows filed past the STOCK Act's 45-day window, stated on the row, never editorialised; both dates and the receipt stay on every row.
0
every row filed inside 45 days
13F holders
255
all listed · 2026-03-31
Congress: statutory ranges, filed up to 45 days after the trade · 13F: quarter-end snapshots, filed up to 45 days lateras of 2026-10-29

On Signals

ACTIVE HITS NAMING RARE · NEWEST FILED FIRST · EVERY HIT CARRIES ITS RECEIPTSignals ↗
Active signal hits naming RARE, newest filed first
KindWhoTraded → FiledSizeSrc
a disclosed trade in an issuer whose sector falls within a committee the member sat on as of the trade date (versioned mapping; membership dated) — context only: no legal, ethical, or causal conflict is established or impliedCisnerosTraded → Filed +13d$1.0K–$15.0K

1–1 of 1 line · 1 hit · each kind word opens its exact rule · every hit is in signals.v1.json.

COMMITTEE: Context, not an allegation.

Congress 5Institutional 255

Congress · disclosure timeline

By trade date · 24 months · 5 rows ▲ buy, ▼ sell; height = lower bound (log scale); ringed = on Signals. Trade date, not filing date — the filing lag is in the table below.

5 dated disclosures in the window, placed by trade date; magnitudes are the disclosed lower bounds, against gridlines at $15K, $250K, $5M; 1 ringed mark is a line of the Signals row above, pinned in the table below.

Members active in RARE

12 months · most active first Rows = number of disclosures, not dollars. Net = lower bound of the net range. Committees as of each member's latest trade in the window (roster snapshot 2026-10-29).
Members disclosing RARE in the trailing 12 months
MemberRowsNet disclosed flow for this ticker: purchases minus sales, computed as a net range on the disclosed amounts. A lower bound is provable, never a point.Number of committees the member sat on as of their latest trade date in the window, from the cc0-legislators roster snapshot. Context, never an allegation; jurisdiction overlap needs the sector join.
Gilbert Ray Cisneros, Jr. D–CA-313$3.0K to $45.0K2

1 member

Congressional disclosures

Signals rows first, then newestAll 5 rows ↗
Latest congressional filings mentioning RARE, the rows on Signals first
FiledMemberSide · OwnerTraded · LagAmountRange · FlagsSrc
2026-10-12Gilbert Ray Cisneros, Jr. D–CA-31 On SignalsBUYTraded 09-29 +13d$1K–$15K
2026-04-07Gilbert Ray Cisneros, Jr. D–CA-31BUYTraded 03-03 +35d$1K–$15K
2026-03-09Gilbert Ray Cisneros, Jr. D–CA-31BUYTraded 02-18 +19d$1K–$15K
2025-09-12Gilbert Ray Cisneros, Jr. D–CA-31BUYTraded 08-08 +35d$1K–$15K
2025-08-14Gilbert Ray Cisneros, Jr. D–CA-31BUYTraded 07-15 +30d$1K–$15K

13F holders · Quarter ended 2026-03-31Newest filing in this build: 2026-07-31. Per-row filing dates are on each receipt. · longs only

Top institutional holders of RARE for quarter 2026-03-31, 1–25 of 255 holders
#FilerValueSecuritiesFlagsderived by Public Filings from this build's reviewed ticker-mapping holders list for this share class; that list carries each holder's share count, share change and filed date, which this table does not show, but no document links — the EDGAR link opens the filer's 13F list·§
1BlackRock, Inc.$153M1
derived ·§ EDGAR ↗
2VANGUARD PORTFOLIO MANAGEMENT LLC$113M1
derived ·§ EDGAR ↗
3STATE STREET CORP$105M1
derived ·§ EDGAR ↗
4AQR CAPITAL MANAGEMENT LLC$95.9M1
derived ·§ EDGAR ↗
5VANGUARD CAPITAL MANAGEMENT LLC$87.8M1
derived ·§ EDGAR ↗
6RTW INVESTMENTS, LP$76.4M1
derived ·§ EDGAR ↗
7SANDS CAPITAL MANAGEMENT, LLC$67.3M1
derived ·§ EDGAR ↗
8WELLINGTON MANAGEMENT GROUP LLP$55.3M1
derived ·§ EDGAR ↗
9Bellevue Group AG$49.9M1
derived ·§ EDGAR ↗
10Assenagon Asset Management S.A.$47.3M1
derived ·§ EDGAR ↗
11TWO SIGMA INVESTMENTS, LP$46.2M1
derived ·§ EDGAR ↗
12FRONTIER CAPITAL MANAGEMENT CO LLC$45.9M1
derived ·§ EDGAR ↗
13CITADEL ADVISORS LLC$44.3M1
derived ·§ EDGAR ↗
14GEODE CAPITAL MANAGEMENT, LLC$38.8M1
derived ·§ EDGAR ↗
15MILLENNIUM MANAGEMENT LLC$37.1M1
derived ·§ EDGAR ↗
16MORGAN STANLEY$31.4M1
derived ·§ EDGAR ↗
17JACOBS LEVY EQUITY MANAGEMENT, INC$30.0M1
derived ·§ EDGAR ↗
18VOLORIDGE INVESTMENT MANAGEMENT, LLC$29.9M1
derived ·§ EDGAR ↗
19D. E. Shaw & Co., Inc.$26.4M1
derived ·§ EDGAR ↗
20Rock Springs Capital Management LP$25.5M1
derived ·§ EDGAR ↗
21Jones Hill Capital LP$24.4M1
derived ·§ EDGAR ↗
22Candriam S.C.A.$23.0M1
derived ·§ EDGAR ↗
23BANK OF AMERICA CORP /DE/$21.9M1
derived ·§ EDGAR ↗
24Qube Research & Technologies Ltd$19.2M1
derived ·§ EDGAR ↗
25Point72 Asset Management, L.P.$18.7M1
derived ·§ EDGAR ↗
Show all 255 holders
Truncated by Public Filings. All 215 13F filers reporting this share class are listed. Method ↗

Crowding — not available in this build. No holder rows for the selected period, so no percentile can be ranked.

Congress ↔ notable managers · RARE

Congress · last 90 days

Buyers
1 Gilbert Ray Cisneros, Jr. D–CA-31 $1K–$15K
Sellers
0 — —

filed 2026-07-31 → 2026-10-29 · statutory ranges

Notable managers · quarter ended 2026-03-31

Adding
0 — $0 held
Trimming
1 Moore Capital Management $3.3M held

by shares · $ = value heldNEW + ADD vs TRIM + EXIT, by share count. $ = reported value now, not the change. · ULTRAGENYX PHARMACEUTICAL IN

Merged timeline of congressional filings and notable-manager moves on RARE
DateWhoChangeSize
2026-10-12Gilbert Ray Cisneros, Jr. CongressBUY$1K–$15K
2026-05-15Moore Capital Management 13FTRIM−42,868 sh

2 newest, by filing date · 13F rows are quarter-end snapshots, not trades

Congress vs filers

12 months
Congress net (rows)3 buy / 0 sell
Congress net ($ bound)$3.0K to $45.0K
Filersnot computedThe filer side needs per-issuer quarter-over-quarter actions, which the published aggregate does not carry for this issuer. Convergence and divergence are stated only when both sides are computed.