Question: Andrew Martin Dober, is an American mixed martial artist who competes in the lightweight division for which American mixed martial arts organization based in Las Vegas, Nevada, that is owned and operated by parent company WME–IMG?
Context: Chris "The Westside Strangler" Brennan (born October 12, 1971) is an American mixed martial artist who competes in the Lightweight division.  He has competed for the UFC, PRIDE, King of the Cage and Shooto.  He is a former King of the Cage Middleweight Champion and former King of the Cage Middleweight Superfight Champion.  He is also one of 18 fighters to compete in the -77 kg division at the ADCC Submission Wrestling World Championships in 2005.  Chris was also the founder of Nogi Industries, a Mixed martial arts clothing company.  In 2014 Chris was inducted in to the Mixed Martial Arts Hall of Fame. Andrew Martin Dober (born October 19, 1988) is an American mixed martial artist who competes in the lightweight division for the Ultimate Fighting Championship.  A professional competitor since 2009, he has also formerly competed for Bellator MMA and Titan Fighting Championship. Darrell Horcher (born July 28, 1987) is an American mixed martial artist currently competing in the Lightweight division of the UFC.  A professional mixed martial artist since 2010, he formerly competed for Bellator and the Cage Fury Fighting Championships, where he was the Lightweight Champion. Melvin Paul Guillard, Jr. (born March 30, 1983) is an American mixed martial artist who competes in the Welterweight division.  Guillard most notably competed in the Lightweight division of the Ultimate Fighting Championship (UFC) where he went (12–9), Bellator MMA (Bellator) where is went (0–3 (1)) and World Series of Fighting (WSOF) where he went (1–1).  He debuted in the company on "The Ultimate Fighter 2" television series, losing to Josh Burkman by decision in the first Welterweight elimination bout.  Guillard currently holds the UFC record for most TKO/KO victories (eight) in the Lightweight division, surpassing the previous record held by Multi-Divisional Champion B.J. Penn with his knockout of Shane Roller at "UFC 132".  He again extended this record in his knockout victory over Mac Danzig at "". Aaron Matthew Riley (born December 9, 1980) is a retired American mixed martial artist who most recently competed in the Lightweight division of the Ultimate Fighting Championship.  A professional competitor from 1997-2013, he has also formerly competed in PRIDE, the IFL, Shooto, and BodogFIGHT.  Aside from mixed martial arts, Riley has also competed in professional boxing. Paul Creighton (born July 4, 1970) is a retired American mixed martial artist and Brazilian Jiu Jitsu black belt under Renzo Gracie who competed in the Lightweight division of the Ultimate Fighting Championship.  His last fight in mixed martial arts competition, came at a losing effort at UFC 37: High Impact at the CenturyTel Center in Bossier City, Louisiana on May 10, 2002 against B.J. Penn. The Ultimate Fighting Championship (UFC) is an American mixed martial arts organization based in Las Vegas, Nevada, that is owned and operated by parent company WME–IMG.  It is the largest MMA promotion in the world and features the top-ranked fighters of the sport.  Based in the United States, the UFC produces events worldwide that showcase eleven weight divisions and abide by the Unified Rules of Mixed Martial Arts.  As of 2017, the UFC has held over 400 events.  Dana White serves as the president of the UFC.  He has held that position since 2001; while under the leadership of Dana White the UFC has grown into a globally popular multibillion-dollar enterprise. Bubba Jenkins (born February 5, 1988) is an American mixed martial artist and former collegiate wrestler.  He grew up in Virginia Beach, Virginia and is well known for winning the 2011 NCAA Division I Championship at 157 lbs.  for Arizona State University.  Jenkins formally fought for the mixed martial arts promotion Bellator Fighting Championships in the featherweight division, after signing a long-term promotional agreement with the organization in May 2013.  Jenkins is currently competing in the lightweight division of the Absolute Championship Berkut. Sean Keith Sherk (born August 5, 1973) is a retired American mixed martial artist and former UFC Lightweight Champion.  Sherk competed in the Ultimate Fighting Championship and was one of the first combatants to have been a championship competitor in multiple weight divisions (having also competed for the UFC Welterweight Championship).  He was the second UFC Lightweight Champion in the organization's history after Jens Pulver vacated his title 5 years earlier.  Sherk also spent time competing in the Japan-based organizations, PRIDE Fighting Championships and Pancrase; going undefeated in both promotions.  He holds one of the longest undefeated streaks in mixed martial arts history, with only four career losses, all to fellow-UFC Champions.  Sherk announced his official retirement from mixed martial arts competition in September 2013 having last fought three years prior. The Khalid Bin Hamad Al Khalifa Mixed Martial Arts (KHK MMA) is a martial arts organization based in Bahrain.  It was founded under the patronage of His Highness Khalid bin Hamad Al Khalifa for its current CEO and professional MMA fighter Mohammed "The Hawk" Shahid in February 2015.  Fighters competing under KHK MMA banner include: former UFC lightweight champion Frankie Edgar, UFC lightweight contender Khabib Nurmagomedov, UFC lightweight fighter Islam Makhachev, Bellator fighter James Gallagher, 2-time IMMAF champion Jose "Shorty" Torres, former UFC fighter and current Titan FC contender Alex Soto, and current Desert Force fighter Hamza Kooheji.  KHK MMA activities include: coaching pro fighters, developing amateur MMA, promoting martial arts events, fitness gyms, and a sports gear brand.
Answer: Ultimate Fighting Championship (UFC)