CYTOMX THERAPEUTICS INC (CTMX) Institutional Ownership and Insiders Activity

CYTOMX THERAPEUTICS INC (CTMX) is widely held by institutional investors, with 176 firms reporting positions valued at approximately $797.45M based on SEC Form 13F filings for the quarter ended June 30, 2026.

Fmr Llc is the largest disclosed holder, reporting approximately $122.68M in CTMX holdings in its latest filing.

Recent insider activity includes 1 tracked Form 4 transaction over the last three months, reflecting ongoing executive and director trading activity.