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Marketaxess Holdings Inc. SEC filings

Marketaxess Holdings (MKTX) filed its 10-Q for the quarter ended 30 June 2026 on 7 August 2026. Its latest SEC filing, on 29 September 2026, was a DEFA14A: additional proxy material. 21 filings in the last twelve months, each 8-K by what it was about; the 10-K and proxy statement are on the documents page.

In the twelve months since 11 October 2025 Marketaxess Holdings Inc. filed 21 documents with the SEC of the kinds listed here: 11 current reports (8-K), about 5 other events; 4 results of operations; 4 officer or director change; 3 regulation FD disclosure; 2 material agreement; 4 additional proxy materials (DEFA14A), 3 quarterly reports (10-Q), 1 annual report to shareholders (ARS), 1 proxy statement (DEF 14A), 1 annual report (10-K). The latest, filed 29 September 2026: DEFA14A, additional proxy material. The 10-K, the 10-Qs and the proxy statement themselves, each with a link to open it, are on the documents page.

FiledFormWhat it was aboutPeriod or event dateFiling
29 September 2026DEFA14Aadditional proxy materialEDGAR
29 September 20268-KOther events25 September 2026EDGAR
7 August 202610-Qquarterly report30 June 2026EDGAR
30 July 2026DEFA14Aadditional proxy materialEDGAR
30 July 20268-KResults of operations, Other events30 July 2026EDGAR
30 July 2026DEFA14Aadditional proxy materialEDGAR
30 July 20268-KMaterial agreement, Officer or director change, Regulation FD disclosure29 July 2026EDGAR
10 June 20268-KShareholder vote10 June 2026EDGAR
7 May 202610-Qquarterly report31 March 2026EDGAR
7 May 20268-KResults of operations, Other events7 May 2026EDGAR
29 April 2026ARSannual report to shareholders31 December 2025EDGAR
29 April 2026DEFA14Aadditional proxy materialEDGAR
29 April 2026DEF 14Aproxy statement29 April 2026EDGAR
17 April 20268-K/AOfficer or director change22 January 2026EDGAR
24 February 202610-Kannual report31 December 2025EDGAR
17 February 20268-KOfficer or director change16 February 2026EDGAR
6 February 20268-KMaterial agreement, Results of operations, New financial obligation, Other events4 February 2026EDGAR
26 January 20268-KOfficer or director change, Regulation FD disclosure22 January 2026EDGAR
9 December 20258-KRegulation FD disclosure9 December 2025EDGAR
7 November 202510-Qquarterly report30 September 2025EDGAR
7 November 20258-KResults of operations, Other events7 November 2025EDGAR
An 8-K is what a company files within four business days of a material event; the SEC numbers the events, and the words here are the SEC's own headings, shortened.
Read moreForm 4, Form 144, 13F and Schedule 13D and 13G have their own pages. Prospectus supplements and correspondence are not listed.

Source

The company's filing index on EDGAR, read from the SEC's submissions feed.

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