| 2026-06-27 | UFC Fight Night: Fiziev vs. Torres | Middleweight | Abusupiyan Magomedov def. Michał Oleksiejczuk | Submission (guillotine choke) | 1 | 3:25 |
| 2026-02-07 | UFC Fight Night: Bautista vs. Oliveira | Middleweight | Michał Oleksiejczuk def. Marc-André Barriault | Decision (unanimous) (29–28, 29–28, 29–28) | 3 | 5:00 |
| 2025-08-16 | UFC 319: du Plessis vs. Chimaev | Middleweight | Michał Oleksiejczuk def. Gerald Meerschaert | TKO (punches) | 1 | 3:03 |
| 2025-04-12 | UFC 314: Volkanovski vs. Lopes | Middleweight | Michał Oleksiejczuk def. Sedriques Dumas | TKO (punches and elbows) | 1 | 2:49 |
| 2024-08-03 | UFC on ABC: Sandhagen vs. Nurmagomedov | Middleweight | Sharabutdin Magomedov def. Michał Oleksiejczuk | Decision (unanimous) (30–27, 30–27, 29–28) | 3 | 5:00 |
| 2024-06-01 | UFC 302: Makhachev vs. Poirier | Middleweight | Kevin Holland def. Michał Oleksiejczuk | Technical Submission (armbar) | 1 | 1:34 |
| 2024-03-09 | UFC 299: O'Malley vs. Vera 2 | Middleweight | Michel Pereira def. Michał Oleksiejczuk | Technical Submission (rear-naked choke) | 1 | 1:01 |
| 2023-08-26 | UFC Fight Night: Holloway vs. The Korean Zombie | Middleweight | Michał Oleksiejczuk def. Chidi Njokuani | TKO (punches) | 1 | 4:16 |
| 2023-04-29 | UFC on ESPN: Song vs. Simón | Middleweight | Caio Borralho def. Michał Oleksiejczuk | Submission (rear-naked choke) | 2 | 2:49 |
| 2022-12-17 | UFC Fight Night: Cannonier vs. Strickland | Middleweight | Michał Oleksiejczuk def. Cody Brundage | KO (punches) | 1 | 3:16 |
| 2022-08-06 | UFC on ESPN: Santos vs. Hill | Middleweight | Michał Oleksiejczuk def. Sam Alvey | TKO (punches) | 1 | 1:56 |
| 2022-03-05 | UFC 272: Covington vs. Masvidal | Light Heavyweight | Dustin Jacoby def. Michał Oleksiejczuk | Decision (unanimous) (29–28, 29–28, 29–28) | 3 | 5:00 |
| 2021-10-30 | UFC 267: Błachowicz vs. Teixeira | Light Heavyweight | Michał Oleksiejczuk def. Shamil Gamzatov | TKO (punches) | 1 | 3:31 |
| 2021-03-27 | UFC 260: Miocic vs. Ngannou 2 | Light Heavyweight | Michał Oleksiejczuk def. Modestas Bukauskas | Decision (split) (29–28, 28–29, 29–28) | 3 | 5:00 |
| 2020-02-23 | UFC Fight Night: Felder vs. Hooker | Light Heavyweight | Jimmy Crute def. Michał Oleksiejczuk | Submission (kimura) | 1 | 3:29 |
| 2019-09-28 | UFC Fight Night: Hermansson vs. Cannonier | Light Heavyweight | Ovince Saint Preux def. Michał Oleksiejczuk | Submission (Von Flue choke) | 2 | 2:14 |
| 2019-04-20 | UFC Fight Night: Overeem vs. Oleinik | Light Heavyweight | Michał Oleksiejczuk def. Gadzhimurad Antigulov | KO (punches) | 1 | 0:44 |
| 2019-02-23 | UFC Fight Night: Błachowicz vs. Santos | Light Heavyweight | Michał Oleksiejczuk def. Gian Villante | TKO (body punch) | 1 | 1:34 |
| 2017-12-30 | UFC 219: Cyborg vs. Holm | Light Heavyweight | Michał Oleksiejczuk vs. Khalil Rountree Jr. | No Contest (overturned) | 3 | 5:00 |