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 (Q2 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Palo Alto Investors Lp, Woodline Partners Lp, Goldman Sachs Group Inc, Bank Of America Corp, and Mpm Bioimpact Llc.

InstitutionTypeChange in sharesChange Position %SharesReported stock balancePortfolio quarterFiling date
Manufacturers Life Insurance Company, TheSell-51,752-38.4%83,034$474.12KQ2 2026Sep 09, 2026
Cygnus Capital Advisors, LlcSell-651-2.9%21,549$123.00KQ2 2026Sep 03, 2026
Citadel Advisors LlcBuy+593,029+98.8%1,193,164$6.81MQ2 2026Sep 02, 2026
Corient Private Wealth LlcBuy+39,408+200.0%59,112$337.53KQ2 2026Aug 27, 2026
California State Teachers Retirement SystemBuy+893,705+12459.3%900,878$900.88KQ2 2026Aug 24, 2026
Palo Alto Investors LpBuy+5,896,180+200.0%8,844,270$50.50MQ2 2026Aug 19, 2026
Mercer Global Advisors IncBuy+15,440+82.5%34,154$195.02KQ2 2026Aug 19, 2026
Fulcrum Asset Management LlpBuy+10,07010,070$56.09KQ2 2026Aug 18, 2026
Woodline Partners LpBuy+4,587,930+196.3%6,925,067$39.54MQ2 2026Aug 14, 2026
Goldman Sachs Group IncBuy+3,672,699+170.6%5,825,579$33.26MQ2 2026Aug 14, 2026
Bank Of America CorpSell-3,645,809-85.6%614,186$3.51MQ2 2026Aug 14, 2026
Mpm Bioimpact LlcBuy+3,544,3543,544,354$20.24MQ2 2026Aug 14, 2026
Ameriprise Financial IncSell-3,388,619-49.1%3,509,623$20.04MQ2 2026Aug 14, 2026
Redmile Group, LlcSell-2,679,891-18.4%11,869,877$67.78MQ2 2026Aug 14, 2026
Logos Global Management LpBuy+1,500,0001,500,000$8.56MQ2 2026Aug 14, 2026
Sixth Street Partners Management Company, L.P.Buy+1,257,7991,257,799$7.18MQ2 2026Aug 14, 2026
Mak Capital One LlcBuy+1,138,137+24.1%5,862,180$33.47MQ2 2026Aug 14, 2026
Bellevue Group AgSell-1,057,274-20.5%4,100,016$23.41MQ2 2026Aug 14, 2026
Balyasny Asset Management L.P.Sell-1,055,933-27.2%2,830,976$16.16MQ2 2026Aug 14, 2026
Great Point Partners LlcBuy+1,000,000+40.0%3,500,000$19.98MQ2 2026Aug 14, 2026
Adage Capital Partners Gp, L.L.C.Sell-800,000-18.6%3,500,000$19.98MQ2 2026Aug 14, 2026
Bain Capital Life Sciences Investors, LlcSell-774,943-14.9%4,437,731$25.34MQ2 2026Aug 14, 2026
Ishara Investments LpBuy+645,750+370.6%820,000$4.68MQ2 2026Aug 14, 2026
Opaleye Management Inc.Sell-617,310-26.5%1,714,451$9.79MQ2 2026Aug 14, 2026
Point72 Asset Management, L.P.Sell-489,096-26.1%1,382,699$7.90MQ2 2026Aug 14, 2026
Ensign Peak Advisors, IncSell-449,678-36.0%800,516$4.57MQ2 2026Aug 14, 2026
D. E. Shaw & Co., Inc.Sell-437,515-62.3%265,284$1.51MQ2 2026Aug 14, 2026
Invesco Ltd.Sell-432,276-56.7%330,729$1.89MQ2 2026Aug 14, 2026
Moore Capital Management, LpBuy+425,332425,332$2.43MQ2 2026Aug 14, 2026
Wells Fargo & Company/MnSell-419,423-30.0%978,055$5.58MQ2 2026Aug 14, 2026
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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.