Ultragenyx Pharmaceutical Inc.

RARENASDAQ

$14.50-0.72 (-4.73% today)

Legend

Insider buy

Insider sell

Congress buy

Congress sell

Hedge Funds
bought vs soldGreener markers show more buyers; redder markers show more sellers.

Company share activityNet buybacksNo changeNet dilution

Marker size reflects transaction size.

Insider buy
Insider sell
Congress buy
Congress sell
Hedge Funds bought vs sold

Share activityNet buybacksNo changeNet dilution

Marker size reflects transaction size. Greener fund markers mean more buyers.

Insider Buy
Insider Sell
Congress Buy
Congress Sell
Hedge funds bought vs sold
BuybackNo changeNet dilution

Ultragenyx Pharmaceutical Inc. price and activity chart data

Showing the 1Y range: Oct 6, 2025 to Oct 5, 2026. Price (-52.0%). 0 insider or congressional trades plotted in this window as 0 markers; nearby trades of the same kind are grouped.

Transactions plotted on the price chart
Date	Category	Person	Role	Action	Amount	Change in holding

Largest institutional holders

13F · Q2 2026

Fund	% of company held	Value	% of portfolio	Quarterly activity
BlackRock, Inc.	10.81%	$356M	0.01%	Not reported
RTW Investments, LP	7.91%	$260M	2.22%	Add 113.68%
Vanguard Portfolio Management LLC	6.89%	$227M	0.01%	Not reported
AQR Capital Management LLC	6.65%	$214M	0.07%	Not reported
State Street Corp	6.25%	$206M	0.01%	Not reported
Vanguard Capital Management LLC	4.36%	$143M	0.00%	Not reported
Two Sigma Investments, LP	3.67%	$121M	0.09%	Not reported
Sands Capital Management, LLC	3.20%	$105M	0.39%	Reduce 1.75%
Jacobs Levy Equity Management, Inc	2.98%	$98.2M	0.35%	Not reported
Frontier Capital Management Co LLC	2.89%	$95.1M	0.89%	Add 29.97%
Geode Capital Management, LLC	2.62%	$86.1M	0.00%	Not reported
Bellevue Group AG	2.01%	$66.2M	1.39%	Reduce 16.69%
D. E. Shaw & Co., Inc.	1.75%	$57.8M	0.03%	Not reported
Sofinnova Investments, Inc.	1.74%	$57.3M	2.96%	Reduce 45.40%
Adage Capital Partners GP, L.L.C.	1.60%	$52.8M	0.07%	Add 229.17%
GW&K Investment Management, LLC	1.50%	$49.5M	0.39%	Not reported
MPM Bioimpact LLC	1.44%	$47.4M	2.89%	New Not reported
Morgan Stanley	1.34%	$44.2M	0.00%	Not reported
Wellington Management Group LLP	1.27%	$41.8M	0.01%	Reduce 52.65%
Voloridge Investment Management, LLC	1.26%	$41.5M	0.18%	Reduce 12.99%
Bank of America Corp	1.16%	$38.3M	0.00%	Not reported
Rock Springs Capital Management LP	0.98%	$32.3M	1.58%	Reduce 20.59%
Jefferies Financial Group Inc.	0.94%	$31M	0.20%	Add 5902.23%
Northern Trust Corp	0.93%	$30.7M	0.00%	Not reported
Eagle Health Investments LP	0.90%	$29.5M	4.89%	Not reported
Qube Research & Technologies Ltd	0.89%	$29.5M	0.03%	Not reported
Russell Investments Group, Ltd.	0.80%	$26.2M	0.02%	Not reported
Millennium Management LLC	0.77%	$25.4M	0.01%	Not reported
Charles Schwab Investment Management Inc	0.77%	$25.4M	0.00%	Not reported
Pictet Asset Management Holding SA	0.76%	$23.2M	0.02%	Add 24.87%
Nuveen, LLC	0.70%	$23.2M	0.01%	Not reported
Vanguard Fiduciary Trust Co	0.68%	$22.4M	0.00%	Not reported
UBS Group AG	0.67%	$22M	0.00%	Not reported
Palo Alto Investors LP	0.61%	$19.9M	2.75%	Not reported
Sphera Funds Management Ltd.	0.60%	$19.6M	2.56%	Reduce 27.29%
Legal & General Group Plc	0.59%	$19.6M	0.00%	Not reported
Panagora Asset Management Inc	0.59%	$19.6M	0.06%	Not reported
FMR LLC	0.59%	$19.3M	0.00%	Not reported
Goldman Sachs Group Inc	0.58%	$19.2M	0.00%	Not reported
Trexquant Investment LP	0.56%	$18.6M	0.11%	Not reported
BNP Paribas Financial Markets	0.51%	$16.6M	0.01%	Not reported
JPMorgan Chase & Co	0.50%	$15.3M	0.00%	Not reported
Bank of New York Mellon Corp	0.48%	$15.7M	0.00%	Not reported
Toronto Dominion Bank	0.42%	$13.9M	0.02%	Not reported
Renaissance Technologies LLC	0.42%	$13.8M	0.02%	Not reported
BNP PARIBAS ASSET MANAGEMENT Holding S.A.	0.42%	$13.7M	0.01%	Reduce 2.13%
Krensavage Asset Management, LLC	0.40%	$13.1M	4.96%	Not reported
Algert Global LLC	0.40%	$13M	0.15%	Not reported
Manufacturers Life Insurance Company, the	0.39%	$12.7M	0.01%	Not reported
SummitTX Capital, L.P.	0.38%	$12.5M	0.32%	Add 7.62%

50 of 292 holders

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