Footnotes:
^[1]: AJ Styles pinned Jerry Lynn in a ‘double-elimination’ match which also included Low Ki and Psicosis to be crowned the first-ever TNA X-Division Champion.
^[2]: This match also included Jerry Lynn.
^[3]: This was a three-way ladder match which also included AJ Styles.
^[4]: At the same show, Jerry Lynn was stripped of the X-Division title due to injury. Syxx-Pac won an invitational ladder match which also included Kid Kash, Tony Mamaluke, The S.A.T., Ace Steele and AJ Styles to win the title.
^[5]: This match also included Jerry Lynn.
^[6]: Michael Shane captured the belt to win the first-ever ‘Ultimate X’ Match which also included Frankie Kazarian to become the new X-Division champion.
^[7]: Sabin regained the X-Division title in an ‘Ultimate X’ match which also included ex-champ Michael Shane, Low Ki and Christopher Daniels.
^[8]: On the same show, Chris Sabin was stripped of the X-Division title due to injury. As the two top challengers, Frankie Kazarian pinned Amazing Red to win the vacant title.
^[9]: During this ‘Ultimate X’ match, Kazarian and Shane pulled down the title together to become co-champions.
^[10]: Since the co-champion thing doesn’t work, the title became vacant. Petey Williams won a 22-man X-Division gauntlet match to be crowned the new X-Division champion.
^[11]: This was an ‘Ultimate X match which also included the ex-champ Petey Williams and Chris Sabin.
^[12]: This was an ‘elimination’ match which included ex-champ AJ Styles, Ron Killings and Elix Skipper. The first elimination was a tag match – the loser of the fall was eliminated. The second elimination was a three-way match – the loser of the fall was elimination. The third elimination was an ‘Ultimate X’ match where the winner would retrieve the belt.
^[13]: This match also included Samoa Joe.
^[14]: This was an ‘Ultimate X’ match which also included AJ Styles.
^[15]: This match also included the ex-champ Samoa Joe, but Sonjay Dutt was the one pinned. The reason Senshi is listed as a two-time champion is because he has also won the belt wrestling as Low Ki.
^[16]: This match also included the ex-champ Christopher Daniels, but Jerry Lynn was the one pinned.
^[17]: This match also included the ex-champ Jay Lethal, but Chris Sabin was pinned.
^[18]: This was a six-man street fight where the one who earns the pin wins the X-Division title which included Jay Lethal and the Motor City Machine Guns against Johnny Devine and Team 3D. Lethal scored the pinfall on Devine.
^[19]: Petey Williams cashes in his ‘Feast or Fired’ contract on Jay Lethal and pinned him quickly with the Canadian Destroyer.
^[20]: This match also included Consequences Creed.
^[21]: Right after Eric Young won the belt, TNA official Jim Cornette stripped him of the belt after he won it in a controversial fashion because of the crazy referee Shane Sewell. The title becomes vacant.
^[22]: This was a tournament final.
^[23]: This was an ‘Ultimate X’ match which also included the ex-champ Alex Shelley, Chris Sabin, Consequences Creed and Jay Lethal.

Credit goes to: PWI Almanac, wrestling-titles.com, and ProWrestlingHistory.com