Combattants Brésil
| 551 |  | Karine Silva | 5-3-0 UFC | #713 |  |
| 552 |  | Karol Rosa | 8-5-0 UFC | #358 | |
| 553 |  | Karol Silva | 0-1-0 REC | #6143 | |
| 554 |  | Karoline Martins | 0-1-0 REC | #7672 | |
| 555 |  | Kaua Fernandes | 0-1-0 REC | #7221 | |
| 556 |  | Kauan Leopoldina | 0-1-0 REC | #6410 | |
| 557 |  | Kaue Fernandes | 3-2-0 UFC | #643 | |
| 558 |  | Kaue Vaz | 0-1-0 REC | #5349 | |
| 559 |  | Kayck Alencar | 0-1-0 REC | #6267 | |
| 560 |  | Kaynan Kruschewsky | 0-2-0 UFC | #4014 | |
| 561 |  | Kelly Ottoni | 0-1-0 REC | #7622 | |
| 562 |  | Kerisson Leal | 0-2-0 REC | #7353 | |
| 563 |  | Ketlen Souza | 4-3-0 UFC | #541 | |
| 564 |  | Ketlen Vieira | 10-5-0 UFC | #396 | |
| 565 |  | Kevin Christian | 0-2-0 UFC | #2224 | |
| 566 |  | Keweny Lopes | 3-4-0 REC | #2575 | |
| 567 |  | Killys Mota | 3-1-0 REC | #3744 | |
| 568 |  | Kleber Koike | 2-4-0 REC | #1856 | |
| 569 |  | Kleber Silva | 2-3-0 REC | #3927 | |
| 570 |  | Kleberson Sousa | 0-1-0 REC | #6858 | |
| 571 |  | Kleydson Rodrigues | 1-3-0 UFC | #3428 | |
| 572 |  | Klidson Abreu | 1-2-0, 1NC UFC | #1635 | |
| 573 |  | Kristiany Carvalho | #8157 | | |
| 574 |  | Kron Gracie | 1-3-0 UFC | #2768 | |
| 575 | | Laisa Silva | 1-0-0 REC | #2213 | |