Illuminus Foundation Inc F/K/a Marquardt Foundation Inc
Grounded in faith, we promote the health and well-being of each individual we serve
Illuminus Foundation Inc F/K/a Marquardt Foundation Inc at a glance
In short: Illuminus Foundation Inc F/K/a Marquardt Foundation Inc gave $136K across 1 grant in 2025 (avg $136K), mostly in Wisconsin. Source: 2025 IRS Form 990.
- Annual giving (2025)
- $135,769
- -22.3% vs 2024
- Grants made (2025)
- 1
- -50.0% vs 2024
- Average grant
- $135,769
- +55.5% vs 2024
- Median grant
- $135,769
- Total assets
- $14,912,916
- +8.7% vs 2024
- Primary geography
- Wisconsin (100% of itemized 2025 grant dollars)
- Latest 990 filing
- Form 990, 2025 View filing
Data from IRS Form 990, 2025; updated September 2026.
Who Illuminus Foundation Inc F/K/a Marquardt Foundation Inc funds
How this funder distributes its grants
Top Recipients
Top recipient in 2025
The largest 2025 recipient was Commonheart Inc ($136K).
Grant Size Distribution
8 grants across all recorded years
The most common grant size was under $50K: 4 grants of 8 (50%).
Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of the 2025 grant dollars on its one itemized grant.
States
Cities
How Illuminus Foundation Inc F/K/a Marquardt Foundation Inc gives
- Giving grew 443% from 2022 to 2025. Method
From the foundation's IRS Form 990 filings. Methodology.
Giving History
Giving Over Time
Total grant dollars and number of grants per year
From 2019 to 2025, annual grant giving ranged from $25K (2022) to $500K (2023). In 2025 it made 1 grant totaling $136K.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| Commonheart Inc Watertown, WI | Support for General Activites | $135,769 |
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Financial History
Multi-year comparison from IRS filings
| Filing year | Total Assets | Revenue | Expenses | Grants paid | Grants | Net Investment Income |
|---|---|---|---|---|---|---|
| 2025 | $14,912,916 | $1,079,136 | $351,135 | $135,769 | 1 | $733,223 |
| 2024 | $13,715,197 | $786,205 | $362,526 | $174,634 | 2 | $279,407 |
| 2023 | $12,211,023 | $1,096,237 | $664,348 | $500,000 | 1 | $270,836 |
| 2022 | $10,810,428 | $5,300,535 | $180,384 | $25,000 | 1 | $264,758 |
| 2021 | $8,396,411 | $1,184,992 | $211,648 | $48,238 | 3 | $909,351 |
| 2020 | $6,365,184 | $510,877 | $273,219 | $102,477 | 3 | $185,385 |
| 2019 | $6,455,028 | $554,044 | $347,790 | $147,954 | 3 | $222,104 |
About Illuminus Foundation Inc F/K/a Marquardt Foundation Inc
Based on IRS filings
Illuminus Foundation Inc F/K/a Marquardt Foundation Inc is a public charity, based in Watertown, WI. IRS filing data is available from 2019 through 2025. As of 2025, the organization holds $14.9M in total assets. In 2025, it awarded 1 grant totaling $136K. Net investment income was $733K.
Leadership & Key People
Officers and directors from IRS filings
Illuminus Foundation Inc F/K/a Marquardt Foundation Inc is led by Matthew Mauthe, CEO on every filing since 2019; none of the 21 officers listed in 2025 report compensation.
Officers on the 2025 filing
Matthew Mauthe
CEO
On filings since 2019
5 hrs/week
No compensation reported
Jennifer Johnson
Executive Director-The Mar
Campus Administrator → Executive Director- the Marquardt, 2022
Executive Director- the Marquardt → Executive Director-The Mar, 2024
On filings since 2019
5 hrs/week
No compensation reported
Rolfe Nervig
President
On filings since 2019
0.5 hrs/week
No compensation reported
Ken Smith
President of Illuminus
New on the 2025 filing
5 hrs/week
No compensation reported
Mike Jones
Executive Director
New on the 2025 filing
5 hrs/week
No compensation reported
Suzanne Whitty
Executive Director
New on the 2025 filing
5 hrs/week
No compensation reported
Donnell Geib
Assistant Secretary & Assistant Treasurer
Board Member → Assistant Secretary & Assistant Treasurer, 2020
On filings since 2019
0.5 hrs/week
No compensation reported
Gary Thorpe
Vice President of Human Resources
Director of Hr → Vice President of Human Resources, 2023
On filings since 2019
5 hrs/week
No compensation reported
Julie Marks
CFO
On filings since 2019
5 hrs/week
No compensation reported
Michael Libby
Senior Vice President of Operations
COO → Senior Vice President of Operations, 2022
On filings since 2019
5 hrs/week
No compensation reported
Mike Nienow
Secretary & Treasurer
On filings since 2019
0.5 hrs/week
No compensation reported
Nicole Chwala
CFO
Controller → CFO, 2022
On filings since 2019
5 hrs/week
No compensation reported
Paul Schmidt
Board Member
On filings since 2019
0.5 hrs/week
No compensation reported
Rick Brewer
Vice President
On filings since 2019
0.5 hrs/week
No compensation reported
Sherry Cira
Senior Vice President of Administration
Senior Vice President of Administration → Senior Vice President of Administrator, 2023
Senior Vice President of Administrator → Senior Vice President of Administration, 2024
On filings since 2019
5 hrs/week
No compensation reported
Mark Pietrowiak
Vice President of Business Development
On filings since 2022
5 hrs/week
No compensation reported
Jeff Hackel
Senior Vice President of Hr
On filings since 2023
5 hrs/week
No compensation reported
Justin Munzel
Senior Vice President of Commonheart
On filings since 2023
5 hrs/week
No compensation reported
Keith Vanlanduyt
Senior Vice President of Marketing & Philanthropy
Senior Vice President of Marketing & Philanthropy → Senior Vice President of Marketing & Philant, 2024
Senior Vice President of Marketing & Philant → Senior Vice President of Marketing & Philanthropy, 2025
On filings since 2023
5 hrs/week
No compensation reported
David Bertsch
Senior Vice President of Facilities & Construction
New on the 2025 filing
5 hrs/week
No compensation reported
Nicole Martin
Senior Vice President of Sales
New on the 2025 filing
5 hrs/week
No compensation reported
Former officers (19)
- Former: Rose Borck (2019–2024) — Rn - Snf
- Former: Jeff Hoffman (2022–2024) — Vice President of Construction
- Former: Lisa White (2023–2024) — Director of Hospice
- Former: Dave Bertsch (2024) — Vice President of Facilities & Construction
- Former: Cheryl Meyer (2019–2022) — Director of Home Health
- Former: Bruce Nelson (2022) — Board Member
- Former: Chris Brasel (2022) — Clinical Reimbursement Manager
- Former: Katie Van Der Linden (2022) — Board Member
- Former: Melisa Tews (2022) — Director of Nurses- the Marquardt
- Former: Mike Wilkes (2022) — Board Member
- Former: Robert Meidenbauer (2022) — Board Secretary & Treasurer
- Former: Scott Dettmann (2022) — Baord Assistant Secretary & Treasurer
- Former: Todd Fischer (2022) — Board President
- Former: William Oswald (2022) — Board Vice President
- Former: David Schoechert (2019–2021) — Board Member
- Former: Juliet Slavens (2020–2021) — Board Member
- Former: Michelle Godfrey (2021) — Campus Administrator
- Former: Marisa Menzel (2019) — Board Member
- Former: Tiffany Caine (2019) — Assistant Secretary & Assistant Treasurer
Data from IRS Form 990 filings, 2019–2025. "On filings since" is the earliest filing we hold that lists the person; hours are average hours per week as reported.
Frequently asked questions about Illuminus Foundation Inc F/K/a Marquardt Foundation Inc
How much does Illuminus Foundation Inc F/K/a Marquardt Foundation Inc give each year?
Illuminus Foundation Inc F/K/a Marquardt Foundation Inc gave $136K across 1 grant in 2025, according to its 2025 IRS Form 990. In 2024 it gave $175K across 2 grants.
How large is Illuminus Foundation Inc F/K/a Marquardt Foundation Inc?
Illuminus Foundation Inc F/K/a Marquardt Foundation Inc reported $14.9M in total assets on its 2025 IRS Form 990. Its revenue that year was $1.1M.
Where does Illuminus Foundation Inc F/K/a Marquardt Foundation Inc operate?
Illuminus Foundation Inc F/K/a Marquardt Foundation Inc has awarded grants in Wisconsin.
What is Illuminus Foundation Inc F/K/a Marquardt Foundation Inc's EIN?
Illuminus Foundation Inc F/K/a Marquardt Foundation Inc's EIN (Employer Identification Number) is 39-1563808. IRS Form 990 filing data is available on this page for 2019–2025.
Data last updated September 2026. Sourced from IRS Form 990 filings.
Data update history
(8)
When this profile's IRS filing data changed on Grantable
- Updated Form 990 for fiscal year 2019 (received by the IRS January 9, 2020)
- Updated Form 990 for fiscal year 2020 (received by the IRS April 23, 2021)
- Updated Form 990 for fiscal year 2021 (received by the IRS May 16, 2022)
- Updated Form 990 for fiscal year 2022 (received by the IRS May 12, 2023)
- Updated Form 990 for fiscal year 2023 (received by the IRS May 15, 2024)
- Updated Form 990 for fiscal year 2024 (received by the IRS May 15, 2025)
- Added Form 990 for fiscal year 2025 (received by the IRS May 13, 2026)
- IRS filings on file for fiscal years 2019–2024
Explore Open Grants
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Funders with grantees in common, and similar funders in Wisconsin
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