REGENXBIO INC (RGNX) Institutional Ownership Changes & 13F Activity

REGENXBIO INC (RGNX) institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC 13F filings (Q1 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions among tracked filers. Notable filers include Renaissance Technologies LLC.

Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q1 2026Renaissance Technologies LLCSell-27,800305,286$2,558,297
Q4 2025Renaissance Technologies LLCBuy23,600333,086$4,796,438
Q3 2025Renaissance Technologies LLCSell-425,714309,486$2,986,540
Q2 2025Renaissance Technologies LLCBuy438,400735,200$6,035,992
Q1 2025Renaissance Technologies LLCBuy25,500296,800$2,122,120
Q4 2024Renaissance Technologies LLCBuy173,800271,300$2,097,149
Q1 2024Renaissance Technologies LLCBuy77,90097,500$2,054
Q4 2023Renaissance Technologies LLCSell-8,10019,600$352
Q2 2023Renaissance Technologies LLCSell-38,07927,700$554
Q1 2021Renaissance Technologies LLCSell-284,66265,779$2,244
Q2 2019Renaissance Technologies LLCSell-519,300350,441$18,002
Q1 2019Renaissance Technologies LLCSell-15,202869,741$49,845
Q4 2018Renaissance Technologies LLCBuy598,443884,943$37,123
Q3 2018Renaissance Technologies LLCBuy152,300286,500$21,631
Q1 2018Renaissance Technologies LLCBuy134,200134,200$4,006

Frequently asked questions about RGNX activity

  • Which institutional owners are buying RGNX?

    Institutional owners buying RGNX 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 RGNX activity?

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

  • Is institutional interest in RGNX increasing?

    Institutional interest in RGNX 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.

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