Summary
Updated Aug 30, 2026
Jeffrey L. Radke is Co-Founder, CEO, Director, 10% Owner of Accelerant Holdings (ARX). 12 SEC Form 4 filings on record going back to 2025, most recently on 11 August 2026. Most recent open-market trade: sold $967K of ARX on 11 August 2026. Lifetime open-market purchases: $999K. Lifetime open-market sales: $8.81M.
Recent Transactions
15Every recent SEC Form 4 transaction Jeffrey L. Radke has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Jeffrey L. Radke go back to 2025: 12 primary Form 4 filings, an average of 6.0 per year. The typical open-market purchase is $999K (1 buy totaling $999K). The largest single buy on record is $999K of ARX in 2025. Sales side: 10 recorded sales totaling $8.81M, so the filing history runs sell-heavy by dollar value. 10 recorded transactions carry a Rule 10b5-1 flag, meaning they were pre-scheduled under a written trading plan rather than discretionary.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Jeffrey L. Radke 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.
- Francis James Oneill - $11.50M of ARX open-market activity in the last 12 months
- Nancy Hasley - $860K of ARX open-market activity in the last 12 months
- Jay Michael Green - $638K of ARX open-market activity in the last 12 months
- Matthew David Sternberg - $332K of ARX open-market activity in the last 12 months
- Christopher Lee-Smith - $197K of ARX open-market activity in the last 12 months
- Samuel Gaynor - $101K of ARX 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 Jeffrey L. Radke?
Jeffrey L. Radke is a corporate insider, tracked as Co-Founder, CEO, Director, 10% Owner of Accelerant Holdings (ARX). InsiderAlpha holds 12 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has Jeffrey L. Radke submitted recently?
8 primary Form 4 filings in the last 90 days, covering 1 company.
Has Jeffrey L. Radke been buying or selling stock?
Recorded transactions: 1 open-market purchase ($999K) and 10 open-market sales ($8.81M) across all tracked filings.
Where can I see all of Jeffrey L. Radke'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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