Summary
Updated Aug 31, 2026
William M. Waterman files SEC Form 4 reports at KIRBY CORP (KEX). 2 SEC Form 4 filings on record going back to 2024, most recently on 6 May 2026. Most recent open-market trade: sold $5.21M of KEX on 26 November 2024. Lifetime open-market sales: $5.21M.
Recent Transactions
2Every recent SEC Form 4 transaction William M. Waterman has reported, most recent first.
Trading Pattern
InsiderAlpha's records for William M. Waterman go back to 2024: 2 primary Form 4 filings, an average of 0.7 per year. 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 William M. Waterman 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 W. Grzebinski - $7.60M of KEX open-market activity in the last 12 months
- Christian G. O'Neil - $4.39M of KEX open-market activity in the last 12 months
- Amy D. Husted - $3.21M of KEX open-market activity in the last 12 months
- Barry E. Davis - $1.09M of KEX open-market activity in the last 12 months
- Ronald A. Dragg - $550K of KEX open-market activity in the last 12 months
- Scott P. Miller - $478K of KEX 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 William M. Waterman?
William M. Waterman is a corporate insider of KIRBY CORP (KEX). InsiderAlpha holds 2 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
When did William M. Waterman last file a Form 4?
The most recent primary Form 4 on record is dated 6 May 2026, one of 2 filings going back to 2024.
Has William M. Waterman been buying or selling stock?
Recorded transactions: 0 open-market purchases and 1 open-market sale ($5.21M) across all tracked filings.
Where can I see all of William M. Waterman'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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