CYTOMX THERAPEUTICS INC (CTMX) Institutional Ownership Changes & 13F Activity

CYTOMX THERAPEUTICS INC (CTMX). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings (Q1 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Bank Of America Corp, Fmr Llc, Kynam Capital Management, Lp, Venrock Adviser, Llc, and Citadel Advisors Llc.

InstitutionTypeChange in sharesChange Position %SharesReported stock balancePortfolio quarterFiling date
Ensign Peak Advisors, IncBuy+592,473—592,473$2.78MQ1 2026Aug 18, 2026
Mirae Asset Global Investments Co., Ltd.Buy+605+7.3%8,838$41.54KQ1 2026Aug 12, 2026
Wells Fargo & Company/MnSell-10-0.2%6,595$31.00KQ1 2026Jul 08, 2026
Bank Of America CorpBuy+9,326,480+1064.3%10,202,785$47.95MQ1 2026May 18, 2026
Ally Bridge Group (Ny) LlcBuy+900,000—900,000$4.23MQ1 2026May 18, 2026
Adar1 Capital Management, LlcSell-772,579-18.5%3,410,190$16.03MQ1 2026May 18, 2026
California State Teachers Retirement SystemBuy+88,379—88,379$415.38KQ1 2026May 18, 2026
Fmr LlcBuy+7,267,528+29.4%31,955,637$150.19MQ1 2026May 15, 2026
Kynam Capital Management, LpBuy+6,047,016+67.4%15,013,093$70.56MQ1 2026May 15, 2026
Venrock Adviser, LlcSell-5,579,376-35.9%9,982,124$46.92MQ1 2026May 15, 2026
Citadel Advisors LlcBuy+5,063,889+1479.4%5,406,193$25.41MQ1 2026May 15, 2026
Nextech Invest, Ltd.Buy+4,449,932—4,449,932$20.91MQ1 2026May 15, 2026
Elmind Capital, LpBuy+3,850,000+550.0%4,550,000$21.39MQ1 2026May 15, 2026
Wellington Management Group LlpBuy+3,582,985—3,582,985$16.84MQ1 2026May 15, 2026
Millennium Management LlcBuy+3,370,537+1163.6%3,660,190$17.20MQ1 2026May 15, 2026
Balyasny Asset Management L.P.Sell-3,141,358-81.1%730,844$3.43MQ1 2026May 15, 2026
Marshall Wace, LlpBuy+2,981,240+257.7%4,138,176$19.45MQ1 2026May 15, 2026
Point72 Asset Management, L.P.Buy+2,685,852+51.8%7,875,390$37.01MQ1 2026May 15, 2026
Qube Research & Technologies LtdBuy+1,188,455+112.0%2,249,583$10.57MQ1 2026May 15, 2026
Two Sigma Investments, LpBuy+1,149,401+73.6%2,710,156$12.74MQ1 2026May 15, 2026
Gilder Gagnon Howe & Co LlcBuy+1,120,309—1,120,309$5.27MQ1 2026May 15, 2026
Patient Square Capital LpBuy+1,085,790—1,085,790$5.10MQ1 2026May 15, 2026
Goldman Sachs Group IncSell-1,001,105-40.7%1,459,839$6.86MQ1 2026May 15, 2026
Eventide Asset Management, LlcBuy+900,000—900,000$4.23MQ1 2026May 15, 2026
Trexquant Investment LpBuy+898,767—898,767$4.22MQ1 2026May 15, 2026
Susquehanna International Group, LlpBuy+888,017+90.5%1,869,615$8.79MQ1 2026May 15, 2026
Boothbay Fund Management, LlcSell-879,663-98.3%15,000$70.50KQ1 2026May 15, 2026
Baker Bros. Advisors LpBuy+725,000+17.1%4,975,826$23.39MQ1 2026May 15, 2026
Dv Trading LlcBuy+714,000—714,000$3.36MQ1 2026May 15, 2026
Eversept Partners, LpBuy+681,424+27.2%3,188,514$14.99MQ1 2026May 15, 2026
Showing 30 of 181

Frequently asked questions about CTMX activity

  • Which institutional owners are buying CTMX?

    Institutional owners buying CTMX 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 CTMX activity?

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

  • Is institutional interest in CTMX increasing?

    Institutional interest in CTMX 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.