The acquisition of 34,514 shares was executed at a weighted average price of $11.27 per share for a total transaction value of ~$389,000.
Traded shares equal 0.05% of the total equity stake held by the insider before the filing.
Total beneficial ownership reached ~74.9 million shares, representing approximately 45% of the company, as the stock was priced at $11.27.
William Wallace McMullen, the Chairman of the Board, reported purchasing 34,514 shares of Mach Natural Resources LP (NYSE:MNR) on Sept. 15, 2026, according to a recent SEC Form 4 filing.
| Metric | Value |
|---|---|
| Transaction value | ~$389,000 |
| Shares purchased | 34,514 |
| Shares purchased (directly held) | 22,124 |
| Shares purchased (indirectly held) | 12,390 |
| Post-transaction shares (directly held) | 22,124 |
| Post-transaction shares (indirectly held) | ~74.9 million |
| Post-transaction value | $838.8 million |
Transaction value based on SEC Form 4 weighted average purchase price ($11.27); post-transaction value based on Sept. 15, 2026 market close ($11.20).
| Metric | Value |
|---|---|
| Share Price (as of market close 2026-09-17) | $10.97 |
| Market Capitalization | $1.80 billion |
| Revenue (TTM) | $1.40 billion |
| Net Income (TTM) | $243.60 million |
Mach Natural Resources LP is a mid-cap independent exploration and production company with a focused geographic footprint in the Anadarko Basin across Western Oklahoma, Southern Kansas, and the Texas Panhandle. The company generated $1.40 billion in revenue and $243.60 million in net income on a trailing twelve-month (TTM) basis, demonstrating operational profitability in the upstream energy sector. Founded in 2023 and headquartered in Oklahoma City, Oklahoma, with 840 employees, Mach pursues a disciplined development strategy targeting conventional and unconventional hydrocarbon accumulations within one of North America's most prolific sedimentary basins.
There are many reasons an insider may sell shares, some of which have no reflection on their belief in the stock's direction, like having to pay a large personal expense or diversifying their holdings.
There is only one reason an insider, like McMullen, buys shares: they believe the stock price will rise.
By that investor's rule of thumb, McMullen's purchase of Mach shares is inherently bullish. On top of that, studies show that, more often than not, an insider purchase predicts a higher share price 30 days later.
The business has been performing well. Mach has a history of strong cash returns on capital invested and cash distributions. Over the past 5 years, it delivered an industry-leading cash return on capital invested (CROCI), averaging 35%, not only industry-leading, but also in the top 1% of all public companies in the U.S. It has also distributed an industry-leading distribution yield of 15% since 2024 through the first quarter of 2026. Wall Street consensus sees revenue rising to $1.43 bllion in the current fiscal year, a rise of 22%.
McMullen founded Mach Natural Resources and the entity that holds a large portion of its shares, Bayou City Energy Management, in 2015, and has been an energy industry analyst and investor since at least 2008. Clearly, he knows the U.S. oil and gas business very well and certainly has his finger on the pulse of Mach's business. It is bullish that he is a buyer.
McMullen's buying now suggests he expects Mach Natural Resources to deliver strong performance this year. High oil prices benefit U.S. producers like Mach, especially since its costs basically haven't changed -- oil prices are rising due to the Iran war, which doesn't affect U.S. production. That means the stock is worth investigating to see if you want to add it to your portfolio.
Before you buy stock in Mach Natural Resources, consider this:
The Motley Fool Stock Advisor analyst team just identified what they believe are the 10 best stocks for investors to buy now… and Mach Natural Resources wasn’t one of them. The 10 stocks that made the cut could produce monster returns in the coming years.
Consider when Netflix made this list on December 17, 2004... if you invested $1,000 at the time of our recommendation, you’d have $379,123!* Or when Nvidia made this list on April 15, 2005... if you invested $1,000 at the time of our recommendation, you’d have $1,408,822!*
Now, it’s worth noting Stock Advisor’s total average return is 950% — a market-crushing outperformance compared to 215% for the S&P 500. Don't miss the latest top 10 list, available with Stock Advisor, and join an investing community built by individual investors for individual investors.
See the 10 stocks »
*Stock Advisor returns as of October 11, 2026.
Brendan Coffey has no position in any of the stocks mentioned. The Motley Fool has no position in any of the stocks mentioned. The Motley Fool has a disclosure policy.