CTMX
−$5K
1,624 sh @ $3
CTMX
CytomX Therapeutics, Inc.
SEC CIK 1501989
$3.31
−38.9% · 90 days
90-day buys
$0
0 open-market
90-day sells
$5K
1 open-market
Net insider flow
−$5K
Net selling
Filings shown
9
Most recent
Revenue (FY2025)
$76.2M
−44.8% YoY
Net income (FY2025)
−$17.37M
Reported
Total assets
$151.57M
Balance sheet
Source
SEC XBRL
From 10-K/10-Q
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At a glance
Over the last 90 days, insiders at CTMX have sold a net $5K of stock (0 open-market buys vs 1 sell).
Largest recent trade: Ogden Christopher sold $124.1K of CTMX, trimming their stake 6%.
Most active filer: Ogden Christopher, with 9 transactions among the recent filings shown.
Insider transaction history
Form 4 filings for CTMX, newest firstCTMX
−$124.1K
19,323 sh @ $6
CTMX
−$28.5K
10,614 sh @ $3
CTMX
−$4.8K
1,641 sh @ $3
CTMX
−$5.1K
8,551 sh @ $1
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CTMX
−$2.4K
1,984 sh @ $1
CTMX
−$6.2K
2,971 sh @ $2
CTMX
−$2.7K
1,990 sh @ $1
CTMX
−$1K
516 sh @ $2
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About CTMX insider activity
This page tracks every recent Form 4 filed for CytomX Therapeutics, Inc. with the U.S. Securities and Exchange Commission. Form 4 is the disclosure that company insiders — officers, directors, and holders of more than 10% of the stock — must file within two business days of buying or selling shares.
The summary above nets open-market purchases against open-market sales over the trailing 90 days. Open-market trades (codes P and S) tend to carry the most signal because they reflect a deliberate choice to put money in or take it out, as opposed to routine grants, option exercises, or tax-withholding events. Use the badges on each row to tell them apart, and always confirm details against the original filing before drawing conclusions.
Frequently asked questions
How often is CTMX insider data updated?
Continuously. We read from SEC EDGAR, so new Form 4 filings for CytomX Therapeutics, Inc. usually appear here within minutes of being accepted by the SEC.
What does "net insider flow" mean?
It is the total dollar value of open-market insider purchases minus open-market sales over the last 90 days. A positive number (green) means insiders bought more than they sold; a negative number (red) means the reverse.
Why do some rows show grants or option exercises instead of buys?
Insiders receive stock through compensation as well as buying it outright. Form 4 captures all of these. We label each transaction by its SEC code so you can focus on open-market activity if you prefer.
Is this investment advice?
No. InsiderSource presents public filing data for informational purposes only. Insider activity is one of many factors to consider and is never a recommendation to buy or sell.