ANNEXON INC (ANNX) Institutional Ownership Changes & 13F Activity

ANNEXON INC (ANNX). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings. This page analyzes institutional buying and selling activity, new holdings, and sold-out positions among tracked filers. Notable filers include Renaissance Technologies LLC and Polen Capital Management.

Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q1 2026Renaissance Technologies LLCSell-258,300544,300$3,015,422
Q1 2026Polen Capital ManagementBuy70,15270,152$388,642
Q4 2025Renaissance Technologies LLCBuy49,021802,600$4,029,052
Q3 2025Renaissance Technologies LLCSell-24,321753,579$2,298,416
Q2 2025Renaissance Technologies LLCSell-384,537777,900$1,866,960
Q1 2025Renaissance Technologies LLCBuy668,7371,162,437$2,243,503
Q4 2024Renaissance Technologies LLCBuy92,300493,700$2,532,681
Q3 2024Renaissance Technologies LLCSell-182,800401,400$2,376,288
Q2 2024Renaissance Technologies LLCSell-87,000584,200$2,862,580
Q1 2024Renaissance Technologies LLCBuy187,000671,200$4,813
Q4 2023Renaissance Technologies LLCSell-77,110484,200$2,198
Q3 2023Renaissance Technologies LLCBuy139,110561,310$1,325
Q2 2023Renaissance Technologies LLCBuy65,100422,200$1,486
Q1 2023Renaissance Technologies LLCBuy47,000357,100$1,375
Q4 2022Renaissance Technologies LLCSell-20,100310,100$1,603
Q3 2022Renaissance Technologies LLCSell-29,700330,200$2,041
Q2 2022Renaissance Technologies LLCSell-236,629359,900$1,357
Q1 2022Renaissance Technologies LLCBuy495,629596,529$1,629
Q4 2021Renaissance Technologies LLCBuy100,900100,900$1,159

Frequently asked questions about ANNX activity

  • Which institutional owners are buying ANNX?

    Institutional owners buying ANNX 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 ANNX activity?

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

  • Is institutional interest in ANNX increasing?

    Institutional interest in ANNX 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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