Summary
Updated Aug 31, 2026
Mark Stephen Katz is EVP & General Counsel of RYAN SPECIALTY HOLDINGS, INC. (RYAN). 5 SEC Form 4 filings on record going back to 2024, most recently on 4 June 2026. Most recent open-market trade: bought $100K of RYAN on 4 June 2026. Lifetime open-market purchases: $100K. Lifetime open-market sales: $3.06M.
Recent Transactions
11Every recent SEC Form 4 transaction Mark Stephen Katz has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Mark Stephen Katz go back to 2024: 5 primary Form 4 filings, an average of 1.7 per year. The typical open-market purchase is $100K (1 buy totaling $100K). The largest single buy on record is $100K of RYAN in 2026. Sales side: 3 recorded sales totaling $3.06M, so the filing history runs sell-heavy by dollar value. No transaction on record carries a Rule 10b5-1 flag - the filings look discretionary rather than pre-scheduled, which makes their timing more informative as a signal.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Mark Stephen Katz 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.
- ONEX CORP - $225.94M of RYAN open-market activity in the last 12 months
- Patrick G. Ryan - $18.24M of RYAN open-market activity in the last 12 months
- Patrick G. Ryan Jr. - $1.04M of RYAN open-market activity in the last 12 months
- John W. Rogers Jr. - $264K of RYAN open-market activity in the last 12 months
- Janice M. Hamilton - $200K of RYAN open-market activity in the last 12 months
- Anthony J. Kuczinski - $105K of RYAN 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 Mark Stephen Katz?
Mark Stephen Katz is a corporate insider, tracked as EVP & General Counsel of RYAN SPECIALTY HOLDINGS, INC. (RYAN). InsiderAlpha holds 5 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has Mark Stephen Katz submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has Mark Stephen Katz been buying or selling stock?
Recorded transactions: 1 open-market purchase ($100K) and 3 open-market sales ($3.06M) across all tracked filings.
Where can I see all of Mark Stephen Katz'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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