ULTRAGENYX PHARMACEUTICAL IN (RARE) Institutional Ownership Changes & 13F Activity

ULTRAGENYX PHARMACEUTICAL IN (RARE). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings (Q2 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Rtw Investments, Lp, Assenagon Asset Management S.A., Aqr Capital Management Llc, Citadel Advisors Llc, and Jacobs Levy Equity Management, Inc.

InstitutionTypeChange in sharesChange Position %SharesReported stock balancePortfolio quarterFiling date
Manufacturers Life Insurance Company, TheSell-69,699-15.5%381,420$12.74MQ2 2026Sep 09, 2026
Integrated Wealth Concepts LlcBuy+9,3189,318$311.13KQ2 2026Sep 09, 2026
Parkside Financial Bank & TrustSell-35-72.9%13$435.00Q2 2026Sep 04, 2026
Citadel Advisors LlcSell-1,904,960-90.0%210,531$7.03MQ2 2026Sep 02, 2026
Corient Private Wealth LlcBuy+9,949+7.3%146,493$4.89MQ2 2026Aug 27, 2026
California State Teachers Retirement SystemSell-3,179-3.0%101,471$3.39MQ2 2026Aug 24, 2026
Assenagon Asset Management S.A.Sell-2,136,807-94.6%120,864$4.04MQ2 2026Aug 21, 2026
Mercer Global Advisors IncBuy+37,307+110.4%71,092$2.37MQ2 2026Aug 19, 2026
Fulcrum Asset Management LlpBuy+112112$3.44KQ2 2026Aug 18, 2026
Jefferies Financial Group Inc.Buy+914,138+5902.2%929,626$31.04MQ2 2026Aug 17, 2026
Stonepine Capital Management, LlcBuy+25,00025,000$834.75KQ2 2026Aug 17, 2026
Capstone Investment Advisors, LlcBuy+660+4.2%16,457$549.50KQ2 2026Aug 17, 2026
Transamerica Financial Advisors, LlcBuy+110+3666.7%113$3.77KQ2 2026Aug 17, 2026
Rtw Investments, LpBuy+4,148,100+113.7%7,796,895$260.34MQ2 2026Aug 14, 2026
Aqr Capital Management LlcBuy+1,982,785+43.3%6,560,809$214.14MQ2 2026Aug 14, 2026
Jacobs Levy Equity Management, IncBuy+1,508,648+105.4%2,939,719$98.16MQ2 2026Aug 14, 2026
Sofinnova Investments, Inc.Sell-1,428,383-45.4%1,717,505$57.35MQ2 2026Aug 14, 2026
Mpm Bioimpact LlcBuy+1,418,2151,418,215$47.35MQ2 2026Aug 14, 2026
Two Sigma Investments, LpBuy+1,415,380+64.2%3,621,200$120.91MQ2 2026Aug 14, 2026
Wellington Management Group LlpSell-1,390,348-52.6%1,250,464$41.75MQ2 2026Aug 14, 2026
Adage Capital Partners Gp, L.L.C.Buy+1,100,000+229.2%1,580,000$52.76MQ2 2026Aug 14, 2026
Millennium Management LlcSell-1,011,359-57.1%760,825$25.40MQ2 2026Aug 14, 2026
Frontier Capital Management Co LlcBuy+656,754+30.0%2,847,936$95.09MQ2 2026Aug 14, 2026
Price T Rowe Associates IncBuy+552,392+68.7%1,356,501$45.30MQ2 2026Aug 14, 2026
Catalio Capital Management, LpSell-534,545-62.8%316,252$10.56MQ2 2026Aug 14, 2026
D. E. Shaw & Co., Inc.Buy+469,175+37.2%1,730,193$57.77MQ2 2026Aug 14, 2026
Schonfeld Strategic Advisors LlcSell-441,856-89.3%52,881$1.77MQ2 2026Aug 14, 2026
Toronto Dominion BankBuy+414,838+256072.8%415,000$13.86MQ2 2026Aug 14, 2026
Bellevue Group AgSell-397,225-16.7%1,982,775$66.20MQ2 2026Aug 14, 2026
Susquehanna International Group, LlpSell-343,927-65.5%180,871$6.04MQ2 2026Aug 14, 2026
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Frequently asked questions about RARE activity

  • Which institutional owners are buying RARE?

    Institutional owners buying RARE include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in RARE activity?

    "Buy" means an investor increased their reported position in RARE compared to the prior reporting period. This reflects growing exposure to ULTRAGENYX PHARMACEUTICAL IN (RARE) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in RARE increasing?

    Institutional interest in RARE can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.