| 2024 | The Ernest J and Dorothy L Klimczak | 990PF | Director | 0 | $0 | $0 | View return |
| 2024 | Lemont Baseball and Softball Club | 990EZ | Treasurer | 3 | $0 | - | View return |
| 2023 | The Ernest J and Dorothy L Klimczak | 990PF | Director | 0 | $0 | $0 | View return |
| 2023 | Lemont Baseball and Softball Club | 990EZ | Treasurer | 3 | $0 | - | View return |
| 2022 | Lemont Baseball and Softball Club | 990EZ | Treasurer | 3 | $0 | - | View return |
| 2022 | The Ernest J and Dorothy L Klimczak | 990PF | Director | 0 | $0 | $0 | View return |
| 2021 | The Ernest J and Dorothy L Klimczak | 990PF | Director | 0 | $0 | $0 | View return |
| 2021 | Lemont Baseball and Softball Club | 990EZ | Treasurer | 3 | $0 | $0 | View return |
| 2020 | The Ernest J and Dorothy L Klimczak | 990PF | Director | 0 | $0 | $0 | View return |
| 2020 | Lemont Baseball and Softball Club | 990EZ | Treasurer | 3 | $0 | $0 | View return |
| 2019 | Lemont Baseball and Softball Club | 990EZ | Treasurer | 3 | $0 | $0 | View return |
| 2019 | The Ernest J and Dorothy L Klimczak | 990PF | Director | 0 | $0 | $0 | View return |
| 2018 | Lemont Baseball and Softball Club | 990EZ | Treasurer | 3 | $0 | $0 | View return |
| 2018 | The Ernest J and Dorothy L Klimczak | 990PF | Director | 0 | $0 | $0 | View return |
| 2017 | Lemont Baseball and Softball Club | 990 | Treasurer | 3 | $0 | $0 | View return |
| 2017 | The Ernest J and Dorothy L Klimczak | 990PF | Director | 0 | $0 | $0 | View return |
| 2016 | Lemont Baseball and Softball Club | 990 | Treasurer | 3 | - | - | View return |
| 2016 | The Ernest J and Dorothy L Klimczak | 990PF | Director | 1 | $0 | $0 | View return |
| 2015 | The Ernest J and Dorothy L Klimczak | 990PF | Director | 1 | $0 | $0 | View return |
| 2015 | Lemont Baseball and Softball Club | 990 | Treasurer | 3 | $0 | $0 | View return |
| 2014 | The Ernest J and Dorothy L Klimczak | 990PF | Director | 1 | $0 | $0 | View return |
| 2013 | The Ernest J and Dorothy L Klimczak | 990PF | Director | 1 | $0 | $0 | View return |
| 2012 | The Ernest J and Dorothy L Klimczak | 990PF | Director | 1 | $0 | $0 | View return |
| 2011 | The Ernest J and Dorothy L Klimczak | 990PF | Director | 1 | $0 | $0 | View return |