Summary
Updated Aug 30, 2026
Matthew David Sternberg is COO, Risk Exchange of Accelerant Holdings (ARX). 5 SEC Form 4 filings on record going back to 2025, most recently on 28 July 2026. Most recent open-market trade: sold $257K of ARX on 28 July 2026. Lifetime open-market purchases: $75K. Lifetime open-market sales: $257K.
Recent Transactions
6Every recent SEC Form 4 transaction Matthew David Sternberg has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Matthew David Sternberg go back to 2025: 5 primary Form 4 filings, an average of 2.5 per year. The typical open-market purchase is $75K (1 buy totaling $75K). The largest single buy on record is $75K of ARX in 2025. Sales side: 1 recorded sale totaling $257K, so the filing history runs sell-heavy by dollar value. 2 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 Matthew David Sternberg 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
- Jeffrey L. Radke - $9.81M 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
- 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 Matthew David Sternberg?
Matthew David Sternberg is a corporate insider, tracked as COO, Risk Exchange of Accelerant Holdings (ARX). InsiderAlpha holds 5 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 Matthew David Sternberg submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has Matthew David Sternberg been buying or selling stock?
Recorded transactions: 1 open-market purchase ($75K) and 1 open-market sale ($257K) across all tracked filings.
Where can I see all of Matthew David Sternberg'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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