By CapitalSnitch Research Desk · updated Oct 11, 2026 · data from SEC filings and official Congress disclosures
Over the past year there were no insider purchases at Marketaxess Holdings Inc. Two insiders sold roughly $1.2 million instead.
That's worth context: executives sell for plenty of routine reasons, from scheduled trading plans to tax bills. Buying is the rarer, more telling signal.
Quarter by quarter: 6 quarters in a row of net selling by insiders. Insiders bought in 0 of the last 7 full quarters. MKTX also shows up in congressional disclosures: 3 reported trades from two lawmakers in two years. 396 investment managers listed MKTX in their latest 13F filings (Q2 2026); more funds sold than bought.
Are insiders buying or selling MKTX stock?
In the last 12 months Marketaxess Holdings Inc insiders made open-market purchases worth about $0 and sales worth about $1.2 million. Data comes from SEC Form 4 filings, updated every 30 minutes on CapitalSnitch.
When was the last insider trade in MKTX?
The most recent open-market insider trade in MKTX was filed on 2026-09-11.
How many institutions own MKTX?
396 investment managers reported holding MKTX in SEC Form 13F filings for Q2 2026.
Has any member of Congress traded MKTX?
Yes. Members of Congress reported 3 trades in MKTX over the past two years. The full list is free on CapitalSnitch.
Free weekly email: the week's biggest insider buys and Congress trades, every Monday. No spam, one-click unsubscribe.
Public-record data for research and education, not investment advice. Insider sales are often pre-planned (10b5-1).
Congress data: Data derived from public disclosures filed under the Ethics in Government Act and the STOCK Act, republished free for public transparency and news reporting. Disclosures may lag the trade by 45 days or more and show amounts only as ranges. This data may not be used for credit rating, loan underwriting, solicitation of money (political, charitable or other), direct-mail or commercial targeting (5 U.S.C. 13107).