William Wallace McMullen holds the role of Director at MACH NATURAL RESOURCES LP (MNR). McMullen has reported 13 insider filings with the SEC since 2024. The most recent filing was in March 2026.
Every role William Wallace McMullen has reported on a Form 4, reconstructed from the filings themselves. Reporting insiders must state their relationship to the issuer (officer title, director seat, or 10% ownership) on every filing.
MACH NATURAL RESOURCES LP (MNR)6 filingsUpdated Aug 31, 2026
William Wallace McMullen is Director, 10% Owner of MACH NATURAL RESOURCES LP (MNR). 6 SEC Form 4 filings on record going back to 2024, most recently on 23 March 2026. Most recent open-market trade: bought $44K of MNR on 23 March 2026. Lifetime open-market purchases: $14.35M. Historical track record: 3/5 stars across 13 tracked purchases.
Every recent SEC Form 4 transaction William Wallace McMullen has reported, most recent first.
InsiderAlpha computes a forward-return-based score for every insider with enough Form 4 purchase history. The metrics below reflect realized performance after each tracked open-market purchase.
| Metric | Value |
|---|---|
| InsiderAlpha rating | ★★★☆☆ (3/5) |
| Total purchases tracked | 13 |
| Purchases with forward-return data | 13 |
| 30-day win rate | 46% |
| 90-day win rate | 23% |
| Avg 5-day return | +1.11% |
| Avg 30-day return | +2.36% |
| Avg 90-day return | -4.64% |
| Best 30-day return |
InsiderAlpha's records for William Wallace McMullen go back to 2024: 6 primary Form 4 filings, an average of 2.0 per year. The typical open-market purchase is $1.10M (13 buys totaling $14.35M). The largest single buy on record is $4.90M of MNR in 2024. 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.
Insiders who reported open-market trades in the last 12 months at the companies William Wallace McMullen 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.
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
William Wallace McMullen is a corporate insider, tracked as Director, 10% Owner of MACH NATURAL RESOURCES LP (MNR). InsiderAlpha holds 6 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
The most recent primary Form 4 on record is dated 23 March 2026, one of 6 filings going back to 2024.
Recorded transactions: 13 open-market purchases ($14.35M) and 0 open-market sales across all tracked filings.
Across 13 tracked purchases, William Wallace McMullen averaged +2.4% avg 30-day return with a 46% 30-day win rate. InsiderAlpha rates the track record at 3/5 stars.
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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$MNR MACH NATURAL RESOURCES LP3.6K shares @ $14.00$50K
| +16.16% |