Summary
Updated Aug 30, 2026
Stephen P. Casper files SEC Form 4 reports at MARKETAXESS HOLDINGS INC (MKTX). 2 SEC Form 4 filings on record, most recently on 8 September 2025. Most recent open-market trade: sold $299K of MKTX on 8 September 2025. Lifetime open-market sales: $299K.
Recent Transactions
2Every recent SEC Form 4 transaction Stephen P. Casper has reported, most recent first.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Stephen P. Casper files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- Kevin M. McPherson - $277K of MKTX open-market activity in the last 12 months
- Scott Pintoff - $142K of MKTX open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
Who is Stephen P. Casper?
Stephen P. Casper is a corporate insider of MARKETAXESS HOLDINGS INC (MKTX). InsiderAlpha holds 2 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did Stephen P. Casper last file a Form 4?
The most recent primary Form 4 on record is dated 8 September 2025, one of 2 filings going back to 2025.
Has Stephen P. Casper been buying or selling stock?
Recorded transactions: 0 open-market purchases and 1 open-market sale ($299K) across all tracked filings.
Where can I see all of Stephen P. Casper's SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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