| 2012-10-13 | UFC 153: Silva vs. Bonnar | Light Heavyweight | Anderson Silva def. Stephan Bonnar | TKO (knee to the body and punches) | 1 | 4:40 |
| 2011-11-19 | UFC 139: Shogun vs. Henderson | Light Heavyweight | Stephan Bonnar def. Kyle Kingsbury | Decision (unanimous) (30–25, 30–27, 30–27) | 3 | 5:00 |
| 2010-12-04 | The Ultimate Fighter: Team GSP vs. Team Koscheck Finale | Light Heavyweight | Stephan Bonnar def. Igor Pokrajac | Decision (unanimous) (29–26, 29–26, 29–26) | 3 | 5:00 |
| 2010-07-03 | UFC 116: Lesnar vs. Carwin | Light Heavyweight | Stephan Bonnar def. Krzysztof Soszynski | TKO (knee and punches) | 2 | 3:08 |
| 2010-02-21 | UFC 110: Nogueira vs. Velasquez | Light Heavyweight | Krzysztof Soszynski def. Stephan Bonnar | TKO (doctor stoppage) | 3 | 1:04 |
| 2009-07-11 | UFC 100 | Light Heavyweight | Mark Coleman def. Stephan Bonnar | Decision (unanimous) (29–28, 29–28, 29–28) | 3 | 5:00 |
| 2009-01-31 | UFC 94: St-Pierre vs. Penn 2 | Light Heavyweight | Jon Jones def. Stephan Bonnar | Decision (unanimous) (30–27, 29–28, 29–28) | 3 | 5:00 |
| 2007-10-20 | UFC 77: Hostile Territory | Light Heavyweight | Stephan Bonnar def. Eric Schafer | TKO (punches) | 2 | 2:47 |
| 2007-07-07 | UFC 73: Stacked | Light Heavyweight | Stephan Bonnar def. Mike Nickels | Submission (rear-naked choke) | 1 | 2:14 |
| 2006-08-26 | UFC 62: Liddell vs. Sobral | Light Heavyweight | Forrest Griffin def. Stephan Bonnar | Decision (unanimous) (30–27, 30–27, 30–27) | 3 | 5:00 |
| 2006-06-28 | UFC Ultimate Fight Night 5 | Light Heavyweight | Rashad Evans def. Stephan Bonnar | Decision (majority) (30–27, 29–28, 28–28) | 3 | 5:00 |
| 2006-04-06 | UFC Ultimate Fight Night 4 | Light Heavyweight | Stephan Bonnar def. Keith Jardine | Decision (unanimous) (29–28, 29–28, 29–28) | 3 | 5:00 |
| 2006-01-16 | UFC Ultimate Fight Night 3 | Light Heavyweight | Stephan Bonnar def. James Irvin | Submission (kimura) | 1 | 4:30 |
| 2005-08-06 | UFC Ultimate Fight Night | Light Heavyweight | Stephan Bonnar def. Sam Hoger | Decision (unanimous) (30–27, 30–27, 30–27) | 3 | 5:00 |
| 2005-04-09 | The Ultimate Fighter: Team Couture vs. Team Liddell Finale | Light Heavyweight | Forrest Griffin def. Stephan Bonnar | Decision (unanimous) (29–28, 29–28, 29–28) | 3 | 5:00 |