MACH Natural Resources (MNR) 10% Owner William W. McMullen Buys Shares

What Happened William W. McMullen, a 10% owner (Managing Partner of Bayou City Energy Management LLC) and a director of Mach Natural Resources GP LLC, reported purchases of 34,514 common units of MACH Natural Resources LP (MNR) on September 15, 2026. The filing lists two acquisitions: 22,124 units at $11.25 each ($248,895) and 12,390 units at $11.30 each ($140,007), totaling approximately $388,902. The purchases were made by Bayou City Energy Management LLC (BCEM), an entity McMullen manages.

Key Details

• Transaction dates: September 15, 2026 (reported on Form 4 filed 2026-09-17).
• Reported purchases: 22,124 units @ $11.25 ($248,895) and 12,390 units @ $11.30 ($140,007); total = 34,514 units for ~$388,902. (Code P = Purchase)
• Footnote F1: The price reported for certain lots is a weighted average; BCEM indicates purchases occurred at prices ranging $11.28–$11.30 across multiple trades and will provide details on request.
• Footnote F2 / Ownership reported: 74,835,939 units are directly held by BCE Mach Aggregator LLC and 36,368 units directly held by BCEM. McMullen, as Managing Partner of BCEM, may be deemed to beneficially own those holdings (total reported = 74,872,307 units), though he disclaims ownership except to the extent of his pecuniary interest.
• Filing timeliness: Report filed two days after the trades (timely under standard 2-business-day Form 4 rules).

Context These were open-market purchases reported by a large, affiliated investor structure (BCEM/BCE Aggregator) connected to McMullen rather than an isolated personal trade. Purchases by insiders or affiliated entities are often viewed as a more positive signal than sales, but this filing is factual disclosure only — it does not state motive.