| 2026-02-28 | UFC Fight Night: Moreno vs. Kavanagh | Women’s Bantamweight | Ailín Pérez def. Macy Chiasson | Decision (unanimous) (29–28, 29–28, 29–28) | 3 | 5:00 |
| 2025-10-04 | UFC 320: Ankalaev vs. Pereira 2 | Catchweight | Yana Kunitskaya def. Macy Chiasson | Decision (unanimous) (29–28, 29–28, 29–28) | 3 | 5:00 |
| 2025-05-31 | UFC on ESPN: Gamrot vs. Klein | Women’s Featherweight | Ketlen Vieira def. Macy Chiasson | Decision (unanimous) (30–27, 29–28, 29–28) | 3 | 5:00 |
| 2024-06-29 | UFC 303: Pereira vs. Procházka 2 | Women’s Bantamweight | Macy Chiasson def. Mayra Bueno Silva | TKO (doctor stoppage) | 2 | 1:58 |
| 2024-03-16 | UFC Fight Night: Tuivasa vs. Tybura | Women’s Bantamweight | Macy Chiasson def. Pannie Kianzad | Submission (rear-naked choke) | 1 | 3:54 |
| 2022-09-10 | UFC 279: Diaz vs. Ferguson | Catchweight | Irene Aldana def. Macy Chiasson | KO (upkick to the body) | 3 | 2:21 |
| 2022-05-07 | UFC 274: Oliveira vs. Gaethje | Catchweight | Macy Chiasson def. Norma Dumont | Decision (split) (30–27, 28–29, 30–27) | 3 | 5:00 |
| 2021-12-18 | UFC Fight Night: Lewis vs. Daukaus | Catchweight | Raquel Pennington def. Macy Chiasson | Submission (guillotine choke) | 2 | 3:07 |
| 2021-03-20 | UFC on ESPN: Brunson vs. Holland | Women’s Bantamweight | Macy Chiasson def. Marion Reneau | Decision (unanimous) (29–28, 29–28, 29–28) | 3 | 5:00 |
| 2020-02-15 | UFC Fight Night: Anderson vs. Błachowicz 2 | Women’s Bantamweight | Macy Chiasson def. Shanna Young | Decision (unanimous) (30–26, 30–26, 30–26) | 3 | 5:00 |
| 2019-09-28 | UFC Fight Night: Hermansson vs. Cannonier | Women’s Bantamweight | Lina Länsberg def. Macy Chiasson | Decision (unanimous) (29–27, 29–27, 29–28) | 3 | 5:00 |
| 2019-05-04 | UFC Fight Night: Iaquinta vs. Cowboy | Women’s Bantamweight | Macy Chiasson def. Sarah Moras | TKO (punches) | 2 | 2:22 |
| 2019-03-02 | UFC 235: Jones vs. Smith | Women’s Bantamweight | Macy Chiasson def. Gina Mazany | TKO (punches) | 1 | 1:49 |
| 2018-11-30 | The Ultimate Fighter: Heavy Hitters Finale | Women’s Featherweight | Macy Chiasson def. Pannie Kianzad | Submission (rear-naked choke) | 2 | 2:11 |