| 2026-05-16 | UFC Fight Night: Allen vs. Costa | Featherweight | Arnold Allen def. Melquizael Costa | Decision (unanimous) (50–45, 50–45, 49–46) | 5 | 5:00 |
| 2026-01-24 | UFC 324: Gaethje vs. Pimblett | Featherweight | Jean Silva def. Arnold Allen | Decision (unanimous) (30–27, 29–28, 29–28) | 3 | 5:00 |
| 2024-07-27 | UFC 304: Edwards vs. Muhammad 2 | Featherweight | Arnold Allen def. Giga Chikadze | Decision (unanimous) (29–28, 29–28, 29–28) | 3 | 5:00 |
| 2024-01-20 | UFC 297: Strickland vs. du Plessis | Featherweight | Movsar Evloev def. Arnold Allen | Decision (unanimous) (29–28, 29–28, 29–28) | 3 | 5:00 |
| 2023-04-15 | UFC on ESPN: Holloway vs. Allen | Featherweight | Max Holloway def. Arnold Allen | Decision (unanimous) (49–46, 49–46, 48–47) | 5 | 5:00 |
| 2022-10-29 | UFC Fight Night: Kattar vs. Allen | Featherweight | Arnold Allen def. Calvin Kattar | TKO (knee injury) | 2 | 0:08 |
| 2022-03-19 | UFC Fight Night: Volkov vs. Aspinall | Featherweight | Arnold Allen def. Dan Hooker | TKO (punches and elbows) | 1 | 2:33 |
| 2021-04-10 | UFC on ABC: Vettori vs. Holland | Featherweight | Arnold Allen def. Sodiq Yusuff | Decision (unanimous) (29–28, 29–28, 29–28) | 3 | 5:00 |
| 2020-01-25 | UFC Fight Night: Blaydes vs. dos Santos | Featherweight | Arnold Allen def. Nik Lentz | Decision (unanimous) (29–28, 29–28, 30–27) | 3 | 5:00 |
| 2019-07-06 | UFC 239: Jones vs. Santos | Featherweight | Arnold Allen def. Gilbert Melendez | Decision (unanimous) (30–27, 30–27, 30–27) | 3 | 5:00 |
| 2019-03-16 | UFC Fight Night: Till vs. Masvidal | Featherweight | Arnold Allen def. Jordan Rinaldi | Decision (unanimous) (30–26, 30–27, 29–28) | 3 | 5:00 |
| 2018-05-27 | UFC Fight Night: Thompson vs. Till | Featherweight | Arnold Allen def. Mads Burnell | Submission (guillotine choke) | 3 | 2:41 |
| 2017-03-18 | UFC Fight Night: Manuwa vs. Anderson | Featherweight | Arnold Allen def. Makwan Amirkhani | Decision (split) (28–29, 30–27, 30–27) | 3 | 5:00 |
| 2016-02-27 | UFC Fight Night: Silva vs. Bisping | Featherweight | Arnold Allen def. Yaotzin Meza | Decision (unanimous) (30–27, 30–27, 30–27) | 3 | 5:00 |
| 2015-06-20 | UFC Fight Night: Jędrzejczyk vs. Penne | Featherweight | Arnold Allen def. Alan Omer | Submission (guillotine choke) | 3 | 1:41 |