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Buy Day today: Neutral (48) Mixed market breadth · no major macro event
CTMX

CytomX Therapeutics Inc

Healthcare · Biotechnology

2.70$ -0.4% vs. previous close Closing price · As of: Sep 28, 2026

Ownership

Ownership Structure

Who owns CytomX Therapeutics Inc (CTMX)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 82.5% of the shares are freely tradable; institutional investors hold 105.4%.

Institutional ownership ?Share of the stock held by institutional investors (funds, banks, insurers) according to regulatory filings. 105.4%
Insiders ?Share of the stock held by the executives, founders and major shareholders of the company itself. 0.6%
Float ?Share of stock freely tradable on the market — not locked up in the hands of founders, insiders, or major shareholders. 82.5%
Short % of float ?Shares sold short as a percentage of the freely tradable float — high values signal many bets on falling prices. 17.5%
Shares Outstanding ?Total number of shares issued. Price times share count gives market cap. 218Mio.

Largest Shareholders

Institutions

Institutions CTMX
Name Stake (%) Shares Change (%) Date
FMR Inc 14.67 31,955,637 +29.4 03/31/2026
Kynam Capital Management, LP 9.96 21,703,093 +44.6 06/30/2026
Perceptive Advisors LLC 4.79 10,439,185 +3.4 06/30/2026
Bank of America Corp 4.68 10,202,785 +1,064.3 03/31/2026
VR Adviser, LLC 4.58 9,982,124 -35.9 03/31/2026
Vanguard Capital Management, LLC 4.01 8,733,118 +0.0 03/31/2026
Point72 Asset Management, L.P. 3.61 7,875,390 +51.8 03/31/2026
State Street Corp 2.60 5,663,408 +10.2 03/31/2026

Funds

Funds CTMX
Name Stake (%) Shares Change (%) Date
State Street® SPDR® S&P® Biotech ETF 3.86 8,404,655 -1.1 08/31/2026
Vanguard MStar Total Stk Mkt Idx Invest 2.86 6,230,387 +0.0 08/31/2026

Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.

Data as of: September 28, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)

Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.

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