| Event | Rank | Mark | By | Meet |
| B-400 | 1 | 47.01 | Ogden, Caleb (2016) (Oak Creek, WI) (US#28) | USATF Youth National Championships 17-18(IL), 2015-07-05(#2) |
| B-400 | 2 | 47.76 | Hofacker, Collin (2015) (Freedom, WI) (US#74) | WI D2 State Meet(WI), 2015-06-06(#1) |
| B-400 | 3 | 47.82 | Wellenstein, Jack (2015) (Madison West, WI) (US#84) | WI D1 State Meet(WI), 2015-06-06(#1) |
| B-400 | 3 | 47.82 | Bednarek, Kenny (2018) (Rice Lake, WI) (US#84) | USATF JO Region 8 Qualifier(IA), 2015-07-12(#1) |
| B-400 | 5 | 48.15 | Thompson, Wyatt (2015) (Mount Horeb, WI) | WI D2 State Meet(WI), 2015-06-06(#3) |
| B-400 | 6 | 48.20 | Johnson, Dom (2015) (Pewaukee, WI) | WI D1 State Meet(WI), 2015-06-06(#3) |
| | | National Elites above. State Elites below | | |
| B-400 | 7 | 48.23 | Powers, Ryan (2017) (Bay Port, WI) | WI D1 State Meet(WI), 2015-06-06(#4) |
| B-400 | 8 | 48.42 | Long, Evan (18) (Ripon, WI) | WI D2 State Meet(WI), 2015-06-06(#2) |
| B-400 | 9 | 48.55 | Sigurdson, Gunner (2015) (Eau Claire North, WI) | WI D1 State Meet(WI), 2015-06-06(#3) |
| B-400 | 10 | 48.71 | Spranger, Sam (2016) (St. Mary's Springs, WI) | WI D3 State Meet(WI), 2015-06-06(#1) |
| B-400 | 11 | 49.03 | Gregory, Jonathan (2015) (Ashwaubenon, WI) | FRCC Conference Meet(WI), 2015-05-19(#2) |
| B-400 | 12 | 49.04 | Mcguire*, Dylan (2015) (Luxemburg-Casco, WI) | WI D2 State Meet(WI), 2015-06-06(#5) |
| B-400 | 13 | 49.15 | Kutschenreuter, Charlie (2015) (East Troy, WI) | WI D2 State Meet(WI), 2015-06-06(#6) |
| B-400 | 14 | 49.22 | Tarnowski, Conor (2015) (Appleton North, WI) | WI D1 Ashwaubenon Sectional(WI), 2015-05-29(#2) |
| B-400 | 14 | 49.22 | Johnson, Dominik (2015) (Pewaukee, WI) | Senior Spotlight Meet(IA), 2015-06-13(#5) |
| B-400 | 16 | 49.31 | Vlasnik, Jesse (2016) (Unity, WI) | WI D3 State Meet(WI), 2015-06-06(#2) |
| B-400 | 17 | 49.58 | Desorcy, Josh (2015) (Hamilton, WI) | WI D1 State Meet(WI), 2015-06-06(#7) |
| B-400 | 18 | 49.61 | Gregory, Jon (2015) (Ashwaubenon, WI) | Ashwaubenon Invitational(WI), 2015-05-09(#1) |
| B-400 | 19 | 49.66 | Lohrenz, Cody (2017) (Hortonville, WI) | WI D1 New London Regional(WI), 2015-05-26(#2) |
| B-400 | 19 | 49.66 | Meyer, Collin (2015) (Aquinas, WI) | WI D2 Viroqua Sectional(WI), 2015-05-29(#2) |
| B-400 | 21 | 49.69 | Canady, Jordan (2016) (Eisenhower, WI) | WI D1 Brookfield East Regional(WI), 2015-05-26(#1) |
| B-400 | 22 | 49.70 | Davis, Andrew (2015) (Turtle Lake, WI) | WI D3 State Meet(WI), 2015-06-06(#3) |
| B-400 | 23 | 49.71 | Schwoerer, Dietrich (2016) (Mcfarland, WI) | WI D2 Viroqua Sectional(WI), 2015-05-29(#3) |
| B-400 | 24 | 49.83 | Lehmann, Mitchell (2016) (West Salem, WI) | WI D2 Viroqua Sectional(WI), 2015-05-29(#4) |
| B-400 | 25 | 49.84 | Harmsen, Adrian (2015) (Waupun, WI) | WI D2 State Meet(WI), 2015-06-06(#7) |
| B-400 | 25 | 49.84 | Vandenberg, Tom (2015) (Cedarburg, WI) | WI D1 State Meet(WI), 2015-06-06(#8) |
| B-400 | 27 | 49.90 | Gloudemans, Parker (2016) (Little Chute, WI) | Eastern Valley Conference Championships(WI), 2015-05-16(#3) |
| B-400 | 28 | 49.93 | Nickel, Trenton (2017) (Kiel, WI) | WI D2 Little Chute Sectional(WI), 2015-05-29(#3) |
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| | | See more performances for B-400 | | |
