| 1 | Sugath R. A. Thilakaratne | 44.61 | | 20 lug 1998 |
| 2 | Singhapurage Aruna Dharshana | 44.99 | | 4 ago 2024 |
| 3 | Kalinga Hewa Kumarage | 45.07 | | 29 lug 2023 |
| 4 | Rohan Pradeep Kumara | 45.25 | | 15 lug 2000 |
| 5 | Prasanna Sampath Amarasekara | 45.47 | | 4 giu 2005 |
| 6 | Kalhara Idupa | 45.50 | | 28 feb 2026 |
| 7 | J.O. Shashintha Silva | 45.79 | | 1 apr 2026 |
| 8 | S.M.S.V Rajakaruna | 45.95 | | 29 mag 2026 |
| 9 | Rajitha Neranjan Rajakaruna | 45.98 | | 28 lug 2023 |
| 10 | Pasindu Lakshan Panambara | 46.08 | | 2 mar 2024 |
| 11 | Pabasara Niku | 46.13 | | 31 mar 2023 |
| 12 | Dinuka Deshan HALGAHA Vithanalage | 46.26 | | 2 mar 2024 |
| 13 | Akalanka Kuda Liyanage | 46.29 | | 11 ott 2025 |
| 14 | Ajith Premakumara Millagaha Gedara | 46.36 | | 6 lug 2017 |
| 15 | Ranga Wimalawansa | 46.36 | | 27 lug 2003 |
| 16 | H.M. DILIP Ruwan | 46.39 | | 28 apr 2018 |
| 17 | Manura KURANAGHE | 46.50 | | 15 lug 2000 |
| 18 | Wickramesinghe Wimaladasa | 46.50 | | 3 set 1972 |
| 19 | Manoj Pushpa Kumara | 46.56 | | 13 giu 2004 |
| 20 | Ashok J. M. K. Jayasundera | 46.60 | | 25 lug 2007 |
| 21 | R.P.Isuru Lakshan | 46.62 | | 19 apr 2025 |
| 22 | A.M.L.P. Gunarathne | 46.64 | | 28 ago 2019 |
| 23 | Kasun Kalhar Senevirathne | 46.65 | | 18 set 2013 |
| 24 | Gayan Rathnayake | 46.78 | | 9 set 2007 |
| 25 | R.A.Ishan Maduranga | 46.80 | | 27 feb 2026 |
| 26 | Sandaruwan Karunarathna | 46.82 | | 31 mar 2024 |
| 27 | Anjana Madushan Gunarathna | 46.82 | | 7 apr 2021 |
| 28 | Tharusha Dhananjaya | 46.83 | | 11 feb 2018 |
| 29 | Thisen Ranvidu | 46.83 | | 1 apr 2026 |
| 30 | Isuru BANS Abewardane | 46.86 | | 16 set 2022 |
| 31 | H.D.R Madushan | 46.92 | | 8 mar 2025 |
| 32 | Dilan ALOKA | 46.95 | | 18 set 2013 |
| 33 | S.K.A.M.I Dismitha | 47.06 | | 29 set 2025 |
| 34 | Dulan PRIYASHANTHA | 47.09 | | 15 giu 2013 |
| 35 | Vinura Lakmal Galolu Kankanamlage | 47.18 | | 1 ago 2020 |
| 36 | Pradeep Ruwan Kumara | 47.28 | | 8 mar 2025 |
| 37 | G.W.Jathya Kirulu | 47.28 | | 15 lug 2024 |
| 38 | Velassamy RATNAKUMARA | 47.35 | | 19 lug 1998 |
| 39 | Herath Indunil | 47.37 | | 22 giu 2018 |
| 40 | Udaya Viraj Weerasinghe | 47.37 | | 14 ago 2014 |
| 41 | E.A.I.S. Edirisinghe | 47.37 | | 10 set 2025 |
| 42 | Malith Thamel | 47.40 | | 19 lug 2024 |
| 43 | G.G.N.P Bandara | 47.41 | | 20 ago 2025 |
| 44 | M.G.D.M. Silva | 47.45 | | 15 set 2018 |
| 45 | I.M Bogoda | 47.45 | | 1 apr 2026 |
| 46 | K.V.K. Silva | 47.46 | | 20 feb 2025 |
| 47 | Chanaka R.J.M. Kalawala | 47.49 | | 22 feb 2018 |
| 48 | M.D Chathuranga | 47.49 | | 24 nov 2023 |
| 49 | Dilshan Udunuwara | 47.53 | | 31 ott 2019 |
| 50 | D.S.R.M.Y.S. Samaranayeka | 47.60 | | 16 ago 2019 |
| 51 | N.H.P.B.M Weerasinghe | 47.63 | | 20 ago 2025 |
| 52 | P.R.P.K. Weerasinghe | 47.64 | | 9 apr 2017 |
| 53 | Thiran Ravishka | 47.64 | | 26 apr 2018 |
| 54 | Hasindu U.h. Nethsara | 47.67 | | 27 feb 2026 |
| 55 | M.S.S.L. Piyathilaka | 47.72 | | 31 ott 2018 |
| 56 | Shanuka Costa | 47.72 | | 24 nov 2025 |
| 57 | P.Salamuthu Jayathilake | 47.74 | | 4 dic 2022 |
| 58 | S.A.D.K.L. Samarasinghe | 47.83 | | 31 ago 2017 |
| 59 | M.M.P. Madusanka | 47.95 | | 16 ago 2019 |
| 60 | Pasindu Teshan Gunawardena | 47.97 | | 9 apr 2022 |
| 61 | H.A.S. SAMPATH Kumara | 47.97 | | 15 mag 2009 |
| 62 | K.M.D. Dharshana | 47.99 | | 3 dic 2022 |
| 63 | Dilan Bogoda | 48.00 | | 16 ago 2019 |
| 64 | H.K.M.S. Jayalal | 48.01 | | 25 giu 2024 |
| 65 | B.K.A. Umesh ANJULA | 48.04 | | 10 mag 2023 |
| 66 | Praveen Salamuthu | 48.10 | | 2 ago 2025 |
| 67 | R.P.D.A.T. Rajapaksha | 48.12 | | 2 mar 2024 |
| 68 | N.K.D Kumarasiri | 48.16 | | 16 lug 2024 |
| 69 | R.D.C. NIROSHAN | 48.19 | | 13 ago 2014 |
| 70 | E.M.Supun NIMANSHA | 48.21 | | 3 ott 2018 |
| 71 | K.K.K. Senawirathne | 48.22 | | 16 ago 2019 |
| 72 | Navishka Sandesh WEERAKOON Mudiyanselage | 48.24 | | 31 ott 2019 |
| 73 | W.L.C. DE Silva | 48.24 | | 16 ago 2019 |
| 74 | Chamika WEERAWARDANA | 48.24 | | 26 apr 2018 |
| 75 | Sumesh Wickramasinghe | 48.25 | | 16 ago 2019 |
| 76 | B.M. Nawshad | 48.27 | | 7 apr 2021 |
| 77 | W.G.I.L. Jayathissa | 48.28 | | 23 apr 2022 |
| 78 | G.R. Dilanka | 48.29 | | 31 mar 2023 |
| 79 | B.K.A.J.A. Priyashantha | 48.30 | | 16 set 2022 |
| 80 | W.D. Kavindu Anjana | 48.31 | | 16 lug 2024 |
| 81 | S.D.Shehan Dilranga | 48.36 | | 15 giu 2025 |
| 82 | Deshan L.l Theekshana | 48.36 | | 11 ott 2025 |
| 83 | Sadila M.d. Rashmika | 48.42 | | 16 lug 2024 |
| 84 | I.M.A Nimansha | 48.43 | | 16 ago 2019 |
| 85 | U.G.A Sampath | 48.44 | | 19 ago 2025 |
| 86 | A.G.L.M. SANDARUWAN | 48.50 | | 28 ago 2019 |
| 87 | S. Dinesh Kumara | 48.54 | | 27 feb 2026 |
| 88 | Kehan Kumarasiri | 48.56 | | 11 apr 2026 |
| 89 | S.W AVANTHA | 48.60 | | 17 giu 2026 |
| 90 | W.P. Sadun NIKESHALA | 48.62 | | 25 ago 2023 |
| 91 | L.H.R Dilshan | 48.77 | | 20 feb 2025 |
| 92 | S.B.L. Samarasinghe | 48.78 | | 27 feb 2026 |
| 93 | D. Madushanka Ranasinghearachchilage | 48.79 | | 16 ago 2019 |
| 94 | W.Rehan Pahasara | 48.79 | | 15 giu 2025 |
| 95 | A.W.A.Kaweesha Anjana | 48.80 | | 16 lug 2024 |
| 96 | D.P.K.S. Nethmina FERNANDO | 48.83 | | 27 feb 2026 |
| 97 | U.G.K.H. Uyanwathitha | 48.85 | | 16 lug 2024 |
| 98 | W.K.D.S. Perera | 48.9HT | | 8 lug 2016 |
| 99 | N.G.D.D.M. DE SILVA | 48.95 | | 18 lug 2024 |
| 100 | B.M.G.G.D.R. Basnayaka | 49.03 | | 16 ago 2019 |