ACS 모스티스티아 울무

Phoenix Ulmu was founded in 2005 and promoted for the first time in the Liga III after only one season. Distributed in the second series, Phoenix was ranked only 17th out of 18 and relegated back to Liga IV. In 2010, under the ownership of Vasile Tîrșolea, Phoenix won again Liga IV – Călărași County and after a promotion play-off against Nova Force Giurgiu, Giurgiu County champions, the team from Ulmu advanced again in the third tier.

After a first season in which the team finished 9th and saved from relegation, Phoenix chose to withdraw from the championship during the 2011–12 edition and disappeared for two years from the scene of the Romanian football.

Enrolled in 2013 in the Liga V – Călărași County, fifth tier of the Romanian football league system, Phoenix Ulmu failed to stand out for the next years being ranked 6th and 4th, then was excluded from the league during the 2015–16 season due to financial problems. This second exclusion was also the last for Phoenix which was now officially dissolved.

In August 2016, Commune of Ulmu re-founded the football team under the name of Mostiștea Ulmu, name given after the Mostiștea Lake that is in the proximity of the locality. At short time after, the Romanian businessman and ex-owner of the team, Vasile Tîrșolea took the control of the football club and in only three seasons managed to promote the club from Liga V to Liga III, road that included a promotion play-off and a surprising victory against the better rated champion of Bucharest, historic club FC Carmen.

In 2021, Vasile Tîrșolea, owner of the club withdrew his financing and the club went back to Liga V, under the previous name, of Phoenix Ulmu.