| Feb 13, 2026 | Rostomyan | * | Gurumoorthi | 17th Annual Southwest Class Tournament | ? | |
| Jul 5, 2025 | Rostomyan | * | Raguraman | 53rd Annual World Open Chess Tournament | ? | |
| May 26, 2025 | Rostomyan | ½–½ | Mikaelyan | Round 6: Rostomyan, Mikayel - Mikaelyan, Arman | Catalan Opening: Closed | |
| May 25, 2025 | Shlyakhtenko | ½–½ | Rostomyan | Round 5: Shlyakhtenko, Robert - Rostomyan, Mikayel | Nimzo-Indian Defense: Sämisch Variation | |
| May 25, 2025 | Rostomyan | ½–½ | Ghazarian | Round 4: Rostomyan, Mikayel - Ghazarian, Kirk | Slav Defense: Quiet Variation, Schallopp Defense | |
| May 24, 2025 | Baryshpolets | ½–½ | Rostomyan | Round 3: Baryshpolets, Andrey - Rostomyan, Mikayel | Queen's Gambit Declined: Semi-Tarrasch Defense, Exchange Variation | |
| May 24, 2025 | Rostomyan | ½–½ | Akopian | Round 2: Rostomyan, Mikayel - Akopian, Vladimir | East Indian Defense | |
| May 24, 2025 | Ali Marandi | ½–½ | Rostomyan | Round 1: Ali Marandi, Cemil Can - Rostomyan, Mikayel | Sicilian Defense: Delayed Alapin Variation, with e6 | |
| May 22, 2025 | Rostomyan | ½–½ | Batchuluun | Round 7: Rostomyan, Mikayel - Batchuluun, Tsegmed | Bogo-Indian Defense: Retreat Variation | |
| Dec 30, 2024 | Rostomyan | ½–½ | Golubka | 34th Annual North American Open | English Defense | |
| Dec 29, 2024 | Rostomyan | 0–1 | Escalante Ramirez | Round 7: Rostomyan, Mikayel - Escalante Ramirez, Brian | Queen's Gambit Accepted: Normal Variation | |
| Dec 29, 2024 | Levine | * | Rostomyan | 34th Annual North American Open | ? | |
| Dec 28, 2024 | Wang | ½–½ | Rostomyan | Round 5: Wang, Justin - Rostomyan, Mikayel | Sicilian Defense: Kramnik Variation | |
| Sep 20, 2023 | Sethuraman | 1–0 | Rostomyan | Tsaghkadzor Open 2023 | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation | |
| Jun 11, 2023 | Rostomyan | 1–0 | Siniauski | U18 | FIDE World Blitz Championship | Bogo-Indian Defense: Retreat Variation | |
| Jun 11, 2023 | Rostomyan | 0–1 | Tsaruk | U18 | FIDE World Blitz Championship | Polish Defense: Spassky Gambit Accepted | |
| Jun 11, 2023 | Rostomyan | 0–1 | Sahakyan | U18 | FIDE World Blitz Championship | Catalan Opening: Open Defense | |
| Jun 11, 2023 | Qalichava | ½–½ | Rostomyan | U18 | FIDE World Blitz Championship | Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Chelyabinsk Variation | |
| Jun 11, 2023 | Oosthuizen | 0–1 | Rostomyan | U18 | FIDE World Blitz Championship | Queen's Pawn Game: Zukertort Variation | |
| Jun 10, 2023 | Rostomyan | 1–0 | Tangatov | boys-18 | Queen's Indian Defense: Fianchetto Variation, Nimzowitsch Variation | |
| Jun 10, 2023 | Rostomyan | 1–0 | Amirali | U18 | FIDE World Blitz Championship | Catalan Opening: Open Defense | |
| Jun 10, 2023 | Kupatadze | 0–1 | Rostomyan | U18 | FIDE World Blitz Championship | Pirc Defense | |
| Jun 10, 2023 | Murzin | 1–0 | Rostomyan | boys-18 | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation | |
| Jun 10, 2023 | Grebnev | 1–0 | Rostomyan | boys-18 | Queen's Gambit Declined: Albin Countergambit | |
| Jun 10, 2023 | Prisacaru | 0–1 | Rostomyan | boys-18 | Indian Defense | |
| Jun 8, 2023 | Rostomyan | 1–0 | Sakovich | boys-18 | Bogo-Indian Defense: Wade-Smyslov Variation | |
| Jun 8, 2023 | Rostomyan | ½–½ | Tangatov | boys-18 | Queen's Indian Defense: Riumin Variation | |
| Jun 8, 2023 | Elmi | 1–0 | Rostomyan | boys-18 | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation | |
| Jun 8, 2023 | Murzin | 1–0 | Rostomyan | boys-18 | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation | |
| Jun 7, 2023 | Rostomyan | 1–0 | Qalichava | boys-18 | Queen's Indian Defense: Fianchetto Variation, Nimzowitsch Variation | |
| Jun 7, 2023 | Rostomyan | 0–1 | Sahakyan | boys-18 | Zukertort Opening: Quiet System | |
| Jun 7, 2023 | Siniauski | 0–1 | Rostomyan | boys-18 | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation | |
| Jun 7, 2023 | Grebnev | 1–0 | Rostomyan | boys-18 | Benko Gambit Accepted: Modern Variation | |
| Jun 6, 2023 | Rostomyan | 1–0 | Vayanos | U18 | FIDE World Rapid Championship | East Indian Defense | |
| Jun 6, 2023 | Rostomyan | ½–½ | Hommadov | boys-18 | East Indian Defense | |
| Jun 6, 2023 | Galajyan | ½–½ | Rostomyan | U18 | FIDE World Rapid Championship | King's Indian Attack | |
| Jun 9, 2022 | Rostomyan | * | Poghosyan | 13th Karen Asrian Memorial | ? | |