Anthony Marnell, the “M” in M Resort, to Open Spite Casino Across the Street

Posted on: September 4, 2025, 01:40h. 

Last updated on: September 4, 2025, 01:56h.

  • Anthony Marnell and his Marnell Companies built Henderson’s M Resort, which opened in 2009
  • Due to the Great Recession, Marnell had $860 million in debt by 2010, which was purchased by Penn National Gaming for $260.5 million
  • Now, Marnell wants to open a competing property directly across from the M

If you ever wondered what the “M” stands for in M Resort, it’s the surname of Anthony A. Marnell III, who built the property 10 miles south of the Strip and opened it in March 2009 — smack in the middle of the Great Recession.

The M Resort is photographed from across St. Rose Parkway, over part of the vacant lot on which M founder Anthony Marnell wants to build a competing casino resort. (Image: Google Street View)

So it’s no coincidence as to where the chair and CEO of the casino development firm Marnell Companies wants to develop his first project after the M: on the northeast corner of Las Vegas Boulevard and St. Rose Parkway — right across the street from the M.

Marnell is looking to put a 600-room casino resort on 35 acres he owns there, according to the Las Vegas Review-Journal. The project would also include a food hall, entertainment lounge, meeting and banquet space, and a pool deck.

In an interview with the local newspaper, Marnell admitted the obvious: that it would be “absolutely in direct competition” with the M.

‘M’ is for Memory

The “M” name was a tribute to the Marnell family legacy in Las Vegas casino development. Anthony’s father, Tony Marnell, famously built the Rio and Mirage, and their firm Marnell Corrao Associates designed and constructed the M Resort.

By October 2010, however, the M was drowning in debt caused by the Great Recession — $860 million, to be exact. That’s when Penn National Gaming (now Penn Entertainment) swooped in and bought the debt for $230.5 million, a 75% discount that effectively gave them control of the property.

By June 2011, Penn had officially acquired the resort after regulatory approval, and Marnell was retained as president, but with no ownership stake, he left the role in 2015. The resort is now owned by Gaming and Leisure Properties and operated by Penn, a structure typical of Penn’s real estate investment trust model.

In 2021, the Henderson City Council approved the sale of a 9-acre lot of city-owned land to Marnell that is part of the footprint of what “Curb Your Enthusiasm” creator Larry David would probably call a “spite casino.”

The council agreed to sell the land for between $4.3 million and $6.8 million, depending on how long closing takes, according to the R-J, though city officials gave Marnell up to 15 years to complete the deal. Marnell said he is most likely three to five years away from breaking ground.

As a condition of the approval, Marnell agreed to develop a casino resort into which he’ll personally invest at least $250 million.

Meanwhile, Penn Entertainment announced on Wednesday a December 1 opening date for a new second tower at M Resort, which would nearly double the property’s capacity to 765 rooms. The property will also get a new restaurant from celebrity chef Emeril Lagasse.