NASDAQ: CTMX
Cytomx Therapeutics Inc Stock Ownership - Who owns Cytomx Therapeutics?

Insider buying vs selling

Have Cytomx Therapeutics Inc insiders been buying or selling?

Buy
Sell
NameRoleDateSharesPriceValue
Christopher OgdenChief Financial Officer2026-06-151,624$3.05
$4.95kSell
Marcia BelvinSVP Chief Scientific Officer2026-03-1731,492$6.42
$202.27kSell
Yuwaye ChuChief Medical Officer2026-03-1721,279$6.42
$136.68kSell
Sean A. McCarthyCEO2026-03-17118,969$6.42
$764.14kSell
Christopher OgdenChief Financial Officer2026-03-1719,323$6.42
$124.11kSell
Sean A. McCarthyCEO2025-11-06101,793$4.54
$461.94kSell

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Net Insider Buy/Sell (L12M) Ownership

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CTMX Shareholders

What type of owners hold Cytomx Therapeutics Inc stock?

Institutional
Insider
Retail
NameHoldSharesValueType
Kevin P. Starr2.39%5,201,767$17.06MInsider
Timothy M. 1. Shannon2.09%4,563,247$14.97MInsider
Robert I. Tepper2.00%4,349,864$14.27MInsider
Canaan IX LP1.14%2,494,381$8.18MInsider
Sean A. McCarthy0.61%1,330,817$4.37MInsider
James E. Flynn0.43%946,024$3.10MInsider
Hadley Harbor Master Investors Cayman LP0.34%749,055$2.46MInsider
Frederick W. Gluck0.24%530,069$1.74MInsider
Bvf Partners L P0.16%358,450$1.18MInsider
Marcia Belvin0.14%300,760$986.49kInsider

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CTMX vs Biotech Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
CTMX0.10%10.10%Net SellingNet Selling
PHAT0.09%41.36%Net SellingNet Selling
RGNX0.06%19.56%Net SellingNet Selling
ALLO0.09%22.57%Net Selling
MNPR0.03%99.97%Net SellingNet Selling

Cytomx Therapeutics Stock Ownership FAQ

Who owns Cytomx Therapeutics?

Cytomx Therapeutics (NASDAQ: CTMX) is owned by 0.10% institutional shareholders, 10.10% Cytomx Therapeutics insiders, and 89.81% retail investors. Kevin P. Starr is the largest individual Cytomx Therapeutics shareholder, owning 5.20M shares representing 2.39% of the company. Kevin P. Starr's Cytomx Therapeutics shares are currently valued at $17.06M.

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