Summary
Updated Aug 31, 2026
Zack David Arnold is President and Chief Executive Officer of INFINITY NATURAL RESOURCES, INC. (INR). 2 SEC Form 4 filings on record going back to 2025, most recently on 5 March 2026. Most recent open-market trade: bought $76K of INR on 25 August 2025. Lifetime open-market purchases: $76K.
Recent Transactions
1Every recent SEC Form 4 transaction Zack David Arnold has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Zack David Arnold go back to 2025: 2 primary Form 4 filings, an average of 1.0 per year. The typical open-market purchase is $76K (1 buy totaling $76K). The largest single buy on record is $76K of INR in 2025. 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 Zack David Arnold 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.
- David Sproule - $4.79M of INR open-market activity in the last 12 months
- William J. Quinn - $871K of INR open-market activity in the last 12 months
- Scott Gieselman - $613K of INR open-market activity in the last 12 months
- Steven D. Gray - $320K of INR open-market activity in the last 12 months
- David P. Poole - $271K of INR 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 Zack David Arnold?
Zack David Arnold is a corporate insider, tracked as President and Chief Executive Officer of INFINITY NATURAL RESOURCES, INC. (INR). InsiderAlpha holds 2 primary Form 4 filings for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did Zack David Arnold last file a Form 4?
The most recent primary Form 4 on record is dated 5 March 2026, one of 2 filings going back to 2025.
Has Zack David Arnold been buying or selling stock?
Recorded transactions: 1 open-market purchase ($76K) and 0 open-market sales across all tracked filings.
Where can I see all of Zack David Arnold'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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