onMain Inc
The vision is to represent Dayton as a city of innovation, entrepreneurialism, creativity, sustainability, and inclusiveness, while establishing a unique platform to create, build, and demonstrate solutions across a range of disciplines from health care, energy, housing, environment, business creation, and neighborhood well-being.
onMain Inc at a glance
In short: onMain Inc gave $6.0M across 1 grant in 2025 (avg $6.0M), mostly in Ohio. Source: 2025 IRS Form 990.
- Annual giving (2025)
- $6,037,576
- Grants made (2025)
- 1
- Average grant
- $6,037,576
- Median grant
- $6,037,576
- Total assets
- $56,110,675
- +645.1% vs 2024
- Primary geography
- Ohio (100% of itemized 2025 grant dollars)
- Latest 990 filing
- Form 990, 2025 View filing
Data from IRS Form 990, 2025; updated September 2026.
Who onMain Inc funds
How this funder distributes its grants
Top Recipients
Top recipient in 2025
The largest 2025 recipient was Think Dayton Building LLC ($6.0M).
Grant Size Distribution
1 grant across all recorded years
The most common grant size was $5M or more: 1 grant of 1 (100%).
Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of the 2025 grant dollars on its one itemized grant.
States
Cities
Giving History
Giving Over Time
Total grant dollars and number of grants per year
In 2025 it made 1 grant totaling $6.0M.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| Think Dayton Building LLC Dayton, OH | Development | $6,037,576 |
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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 | $56,110,675 | $11,665,968 | $7,582,018 | $6,037,576 | 1 | $24,274 |
| 2024 | $7,531,092 | — | $926,577 | — | — | — |
| 2023 | $4,104,663 | $66,667 | $827,986 | — | — | — |
| 2022 | $3,289,466 | $444,444 | $743,754 | — | — | — |
| 2021 | $3,103,055 | $444,444 | $706,652 | — | — | — |
| 2020 | $3,003,179 | $1,858,462 | $811,828 | — | — | — |
| 2019 | $2,350,436 | $444,444 | $708,061 | — | — | — |
About onMain Inc
Based on IRS filings
onMain Inc is a public charity focused on Community Improvement & Capacity Building, based in Dayton, OH. IRS filing data is available from 2019 through 2025. As of 2025, the organization holds $56.1M in total assets. In 2025, it awarded 1 grant totaling $6.0M. Net investment income was $24K.
Focus Areas
Leadership & Key People
Officers and directors from IRS filings
onMain Inc is led by Brian C Heitkamp, CEO on every filing since 2022; none of the 10 officers listed in 2025 report compensation.
Officers on the 2025 filing
Brian C Heitkamp
CEO
On filings since 2022
20 hrs/week
No compensation reported
Richard Omlor
Director & Chairperson
On filings since 2019
3 hrs/week
No compensation reported
Andrew T Horner
Director & Assistant Treasurer
On filings since 2019
3 hrs/week
No compensation reported
Helen E Jones-Kelley
Director
On filings since 2019
3 hrs/week
No compensation reported
Mary Ann P Recker JD
Director
On filings since 2019
3 hrs/week
No compensation reported
Kathleen Carlson
Director
On filings since 2022
3 hrs/week
No compensation reported
Joseph Geraghty
Director
On filings since 2023
3 hrs/week
No compensation reported
Joann Ringer
Treasurer & Secretary
Director → Treasurer & Secretary, 2022
On filings since 2021
3 hrs/week
No compensation reported
Mariah Vogelgesang
Vice President
On filings since 2024
40 hrs/week
No compensation reported
Megan Leatherman
Planning & Construction Manager
New on the 2025 filing
20 hrs/week
No compensation reported
Former officers (4)
- Former: Emile LaChance (2019–2024) — President & COO
- Former: Anita J Moore (2019–2021) — Director, Treasurer & Secretary
- Former: Mike Uhl (2019–2021) — Director & Assistant Secretary
- Former: Barbara Johnson (2019–2020) — Director
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 onMain Inc
How much does onMain Inc give each year?
onMain Inc gave $6.0M across 1 grant in 2025, according to its 2025 IRS Form 990.
How large is onMain Inc?
onMain Inc reported $56.1M in total assets on its 2025 IRS Form 990. Its revenue that year was $11.7M.
What is onMain Inc?
onMain Inc is a public charity focused on Community Improvement & Capacity Building, based in Dayton, OH. It holds $56.1M in total assets as of 2025.
Where does onMain Inc operate?
onMain Inc has awarded grants in Ohio.
What is onMain Inc's EIN?
onMain Inc's EIN (Employer Identification Number) is 83-2877212. 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
(2)
When this profile's IRS filing data changed on Grantable
- Added Form 990 for fiscal year 2025 (received by the IRS May 15, 2026)
- Added Form 990 for fiscal year 2019 (received by the IRS May 4, 2020)
Live grants for the work onMain Inc funds
Community Improvement & Capacity Building Open opportunities, soonest deadline first.
Explore Open Grants
Browse active grant opportunities in onMain Inc's focus areas in our free grants database
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The filing figures on this page are open data under CC BY 4.0. About GrantGraph Open
Figures come from onMain Inc's IRS filings (methodology). AI-written summaries, news items and logos are not covered by the open licence. Spot an error? Email hello@grantable.co.
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