| 2025 | Klamath Outdoor Science School | 990 | Advisory Board Member | 0.1 | $0 | $0 | View return |
| 2025 | Hot Meals on Wheels Inc. | 990EZ | Secretary | 5 | $0 | $0 | View return |
| 2024 | Hamm Memorial Psychiatric Clinic | 990 | Board Secretary | 2 | $0 | $0 | View return |
| 2024 | Hot Meals on Wheels Inc. | 990EZ | Secretary | 5 | $0 | $0 | View return |
| 2024 | Klamath Outdoor Science School | 990 | Advisory Board Member | 0.25 | $0 | $0 | View return |
| 2024 | Central Lakes Concert Association | 990EZ | Director | 5 | $0 | - | View return |
| 2024 | Animal Action League | 990 | Secretary | 10 | $0 | $0 | View return |
| 2024 | Hamm Memorial Psychiatric Clinic | 990 | Board Secretary | 2 | $0 | $0 | View return |
| 2023 | Minnetonka Teachers Association | 990 | Gov Brd Rep | 1 | $420 | $0 | View return |
| 2023 | Hamm Memorial Psychiatric Clinic | 990 | Board Secretary | 2 | $0 | $0 | View return |
| 2023 | Hot Meals on Wheels Inc. | 990EZ | Secretary | 5 | $0 | $0 | View return |
| 2023 | Mark and Kathy Larson Foundation | 990PF | President | 0 | $0 | $0 | View return |
| 2023 | Mark and Kathy Larson Foundation | 990PF | Treasurer | 0 | $0 | $0 | View return |
| 2023 | Klamath Outdoor Science School | 990 | Advisory Board Member | 0.1 | $0 | $0 | View return |
| 2023 | Fairbanks Women'S Hockey Association | 990EZ | President | 1 | $0 | $0 | View return |
| 2022 | South Haven Area Habitat for Humanity | 990 | Board Member | 1 | $0 | $0 | View return |
| 2022 | Minnesota Music Educators Association | 990 | Choir VP | 5 | $0 | $0 | View return |
| 2022 | Mark and Kathy Larson Foundation | 990PF | President | 0 | $0 | $0 | View return |
| 2022 | Mark and Kathy Larson Foundation | 990PF | Treasurer | 0 | $0 | $0 | View return |
| 2022 | Hot Meals on Wheels Inc. | 990EZ | Secretary | 5 | $0 | $0 | View return |
| 2022 | Hot Meals on Wheels Inc. | 990EZ | Secretary | 5 | $0 | $0 | View return |
| 2022 | Klamath Outdoor Science School | 990 | Advisory Board Member | 0.25 | $0 | $0 | View return |
| 2022 | Fairbanks Women'S Hockey Association | 990EZ | President | 1 | $0 | $0 | View return |
| 2022 | Minnetonka Teachers Association | 990 | Gov Brd Rep | 1 | $0 | $0 | View return |
| 2021 | Henry B Babson & Farrington R Carpenter CIVIC Imp Fnd Hayden Co | 990 | Treasurer | 5 | $0 | $0 | View return |
| 2021 | Federation of Texas A&M University Mothers Club | 990EZ | VP Socials | 5 | $0 | $0 | View return |
| 2021 | Cinco Ranch Southwest Community Council Inc | 990 | Secretary | 2 | $0 | $0 | View return |
| 2021 | South Haven Area Habitat for Humanity | 990 | Board Member | 1 | $0 | $0 | View return |
| 2021 | Animal Action League | 990 | Director | 5 | $0 | $0 | View return |
| 2021 | Mark and Kathy Larson Foundation | 990PF | President | 0 | $0 | $0 | View return |
| 2021 | Mark and Kathy Larson Foundation | 990PF | Treasurer | 0 | $0 | $0 | View return |
| 2021 | Minnesota Music Educators Association | 990 | Choir VP | 5 | $0 | $0 | View return |
| 2021 | Hot Meals on Wheels Inc. | 990EZ | Secretary | 5 | $0 | $0 | View return |
| 2021 | Fairbanks Women'S Hockey Association | 990EZ | Vice President | 2 | $0 | $0 | View return |
| 2021 | Independent Living Center - Homer | 990 | Director | 2 | $0 | $0 | View return |
| 2020 | South Haven Area Habitat for Humanity | 990 | Board Member | 1 | $0 | $0 | View return |
| 2020 | Mark and Kathy Larson Foundation | 990PF | President | 0 | $0 | $0 | View return |
| 2020 | Mark and Kathy Larson Foundation | 990PF | Treasurer | 0 | $0 | $0 | View return |
| 2020 | Fairbanks Women'S Hockey Association | 990EZ | Vice President | 1 | $0 | $0 | View return |
| 2020 | Upper Midwest Great Dane Rescue | 990EZ | Director Of Home Visits, Adoptions And Transports | 0 | $0 | $0 | View return |
| 2020 | Animal Action League | 990 | Director | 5 | $0 | $0 | View return |
| 2020 | Independent Living Center - Homer | 990 | Director | 2 | $0 | $0 | View return |
| 2020 | Henry B Babson & Farrington R Carpenter CIVIC Imp Fnd Hayden Co | 990 | Treasurer | 5 | $0 | $0 | View return |
| 2019 | Mark and Kathy Larson Foundation | 990PF | President | 0 | $0 | $0 | View return |
| 2019 | Mark and Kathy Larson Foundation | 990PF | Treasurer | 0 | $0 | $0 | View return |
| 2019 | Upper Midwest Great Dane Rescue | 990EZ | Director Of Home Visits, Adoptions And Transports | 0 | $0 | $0 | View return |
| 2019 | Independent Living Center - Homer | 990 | Director | 2 | $0 | $0 | View return |
| 2019 | South Haven Area Habitat for Humanity | 990 | Board Member | 1 | $0 | $0 | View return |
| 2018 | South Haven Area Habitat for Humanity | 990 | Board Member | 1 | $0 | $0 | View return |
| 2018 | Friends of the Scout Cabin | 990EZ | Secretary | 1 | $0 | - | View return |
| 2018 | Mark and Kathy Larson Foundation | 990PF | President | 0 | $0 | $0 | View return |
| 2018 | Mark and Kathy Larson Foundation | 990PF | Treasurer | 0 | $0 | $0 | View return |
| 2018 | Independent Living Center - Homer | 990 | Director | 1 | $0 | $0 | View return |
| 2017 | Neenah Baseball Inc. | 990EZ | Former Treas | 10 | $1,250 | - | View return |
| 2017 | Rutheron Water Users Association Inc | 990 | Board Member | 1 | - | - | View return |
| 2017 | Mark and Kathy Larson Foundation | 990PF | President | 0 | $0 | $0 | View return |
| 2017 | Mark and Kathy Larson Foundation | 990PF | Treasurer | 0 | $0 | $0 | View return |
| 2017 | South Haven Area Habitat for Humanity | 990 | Board Member | 1 | $0 | $0 | View return |
| 2017 | Friends of the Scout Cabin | 990EZ | Secretary | 1 | $0 | - | View return |
| 2017 | Main Street Chanute Inc | 990EZ | Director | 0 | $0 | - | View return |
| 2017 | Independent Living Center - Homer | 990 | Member | 2 | $0 | $0 | View return |
| 2016 | Neenah Baseball Inc. | 990EZ | Treasurer | 10 | $1,250 | - | View return |
| 2016 | Friends of the Scout Cabin | 990EZ | Secretary | 1 | $0 | - | View return |
| 2016 | South Haven Area Habitat for Humanity | 990 | Board Member | 1 | $0 | $0 | View return |
| 2016 | Mark and Kathy Larson Foundation | 990PF | President | 0 | $0 | $0 | View return |
| 2016 | Mark and Kathy Larson Foundation | 990PF | Treasurer | 0 | $0 | $0 | View return |
| 2016 | Main Street Chanute Inc | 990EZ | Director | 0 | $0 | - | View return |
| 2016 | Utah Wind Symphony | 990EZ | Secretary | 2 | $0 | $0 | View return |
| 2015 | Neenah Baseball Inc. | 990EZ | Treasurer | 10 | $1,250 | - | View return |
| 2015 | West Side Citizens Organization | 990EZ | President | 7 | $0 | $0 | View return |
| 2015 | Animal Action League | 990 | Director | 0 | $0 | $0 | View return |
| 2015 | Friends of the Scout Cabin | 990EZ | Secretary | 1 | $0 | - | View return |
| 2015 | Rutheron Water Users Association Inc | 990 | Director | 0 | $0 | $0 | View return |
| 2015 | South Haven Area Habitat for Humanity | 990 | Board Member | 1 | $0 | $0 | View return |
| 2015 | Mark and Kathy Larson Foundation | 990PF | President | 0 | $0 | - | View return |
| 2015 | Mark and Kathy Larson Foundation | 990PF | Treasurer | 0 | $0 | - | View return |
| 2015 | Main Street Chanute Inc | 990EZ | Director | 0 | $0 | - | View return |
| 2014 | South Haven Area Habitat for Humanity | 990 | Board Member | 1 | $0 | $0 | View return |
| 2014 | Friends of the Scout Cabin | 990EZ | Secretary | 1 | $0 | - | View return |
| 2014 | West Side Citizens Organization | 990EZ | Board Member | 5 | $0 | $0 | View return |
| 2014 | Neenah Baseball Inc. | 990EZ | Treasurer | 10 | $0 | - | View return |
| 2014 | Grand Avenue Club Inc. | 990 | Director | 1 | $0 | $0 | View return |
| 2014 | Mark and Kathy Larson Foundation | 990PF | President | 0 | $0 | - | View return |
| 2014 | Mark and Kathy Larson Foundation | 990PF | Treasurer | 0 | $0 | - | View return |
| 2014 | Madison Community Foundation Inc | 990 | Sec/Treasure | - | $0 | $0 | View return |
| 2014 | Rutheron Water Users Association Inc | 990 | Director | 0 | $0 | $0 | View return |
| 2013 | Anacortes Chamber of Commerce | 990 | Past Preside | 1 | $0 | $0 | View return |
| 2013 | Grand Avenue Club Inc. | 990 | Director | 0.25 | $0 | $0 | View return |
| 2013 | Rutheron Water Users Association Inc | 990 | Director | 0 | $0 | $0 | View return |
| 2013 | Mark and Kathy Larson Foundation | 990PF | President | 0 | $0 | - | View return |
| 2013 | Mark and Kathy Larson Foundation | 990PF | Treasurer | 0 | $0 | - | View return |
| 2013 | Neenah Baseball Inc. | 990EZ | Treasurer | 10 | $0 | - | View return |
| 2013 | Utah Wind Symphony | 990EZ | Secretary | 5 | $0 | - | View return |
| 2012 | Mark and Kathy Larson Foundation | 990PF | President | 0 | $0 | $0 | View return |
| 2012 | Mark and Kathy Larson Foundation | 990PF | Treasurer | 0 | $0 | $0 | View return |
| 2011 | Mark and Kathy Larson Foundation | 990PF | President | 0 | $0 | $0 | View return |
| 2011 | Mark and Kathy Larson Foundation | 990PF | Treasurer | 0 | $0 | $0 | View return |