Olbrich Botanical Society Foundation Inc
Olbrich Botanical Society Foundation is organized exclusively for charitable and education purposes within the meaning of section 501(c) (3) of the internal revenue code, or the corresponding section of any future federal tax code. Such purposes shall include the receipt by gift, grant, devise or bequest of property of all kinds: the administration, investment and reinvestment of such property in stocks, bonds and other forms of investment; and the use of such property exclusively for the benefit of the olbrich botanical society, a not for profit corporation created under the laws of the state of Wisconsin.
Olbrich Botanical Society Foundation Inc at a glance
In short: Olbrich Botanical Society Foundation Inc gave $336K across 1 grant in 2024 (avg $336K), mostly in Wisconsin. Source: 2024 IRS Form 990.
- Annual giving (2024)
- $335,624
- +3.1% vs 2023
- Grants made (2024)
- 1
- +0.0% vs 2023
- Average grant
- $335,624
- +3.1% vs 2023
- Median grant
- $335,624
- Total assets
- $9,551,770
- +14.8% vs 2023
- Primary geography
- Wisconsin (100% of itemized 2024 grant dollars)
- Latest 990 filing
- Form 990, 2024 View filing
Data from IRS Form 990, 2024; updated September 2026.
Who Olbrich Botanical Society Foundation Inc funds
How this funder distributes its grants
Top Recipients
Top recipient in 2024
The largest 2024 recipient was Olbrich Botanical Society ($336K).
Grant Size Distribution
5 grants across all recorded years
The most common grant size was in the $250–500K range: 5 grants of 5 (100%).
Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of the 2024 grant dollars on its one itemized grant.
States
Cities
How Olbrich Botanical Society Foundation Inc gives
- Giving held roughly steady from 2021 to 2024 (+14%). 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 2020 to 2024, annual grant giving ranged from $273K (2020) to $336K (2024). In 2024 it made 1 grant totaling $336K.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| Olbrich Botanical Society Madison, WI | General Assistance | $335,624 |
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Financial History
Multi-year comparison from IRS filings
| Filing year | Total Assets | Revenue | Expenses | Grants paid | Grants | Net Investment Income |
|---|---|---|---|---|---|---|
| 2024 | $9,551,770 | $1,244,163 | $376,314 | $335,624 | 1 | $698,588 |
| 2023 | $8,323,139 | $628,248 | $362,015 | $325,651 | 1 | $242,694 |
| 2022 | $7,010,797 | $242,974 | $346,868 | $312,084 | 1 | $186,397 |
| 2021 | $8,474,082 | $1,100,800 | $330,226 | $294,720 | 1 | $871,400 |
| 2020 | $7,503,857 | $152,342 | $304,573 | $273,420 | 1 | $142,269 |
About Olbrich Botanical Society Foundation Inc
Based on IRS filings
Olbrich Botanical Society Foundation Inc is a public charity focused on Environment & Animals, based in Madison, WI. IRS filing data is available from 2020 through 2024. As of 2024, the organization holds $9.6M in total assets. In 2024, it awarded 1 grant totaling $336K. Net investment income was $699K.
Focus Areas
Leadership & Key People
Officers and directors from IRS filings
Olbrich Botanical Society Foundation Inc is led by Tanya Zastrow, Obs Executive Director on every filing since 2022; 1 of 10 officers listed in 2024 is compensated.
Officers on the 2024 filing
Tanya Zastrow
Obs Executive Director
On filings since 2022
1 hr/week
$109K (2024)
Sandra Dolister
President
On filings since 2022
1 hr/week
No compensation reported
Dan Matson
Director
On filings since 2020
1 hr/week
No compensation reported
Jeff Levy
Director
On filings since 2020
1 hr/week
No compensation reported
Phil Bradbury
Director & Executive Officio
On filings since 2021
1 hr/week
No compensation reported
Laura Peterson
Director & Executive Officio
On filings since 2022
1 hr/week
No compensation reported
Alnisa Allgood
Director & Executive Officio
On filings since 2023
1 hr/week
No compensation reported
Ann Casey
Director
On filings since 2023
1 hr/week
No compensation reported
Dennis Birke
Secretary & Treasurer
On filings since 2020
1 hr/week
No compensation reported
Tim Sherry
Vice President
On filings since 2020
1 hr/week
No compensation reported
Former officers (9)
- Former: John Ajack Bolz (2020–2023) — Director
- Former: Julie Rupert (2020–2022) — Director & Executive Officio
- Former: Phyllis Lovrien (2021–2022) — Director
- Former: Sandy Dolister (2020–2021) — President
- Former: Roberta Sladky Obs Executive (2021) — Director & Executive Officio
- Former: Tanya Zastrow Obs Executive (2021) — Director
- Former: Bill White Former Obs (2020) — President, Director & Executive Officio
- Former: Mary Phillips (2020) — Director & Executive Officio
- Former: Roberta Sladky (2020) — Director & Executive Officio
Data from IRS Form 990 filings, 2020–2024. "On filings since" is the earliest filing we hold that lists the person; hours are average hours per week as reported.
Compensation Overview
From 2024 IRS filing
The highest reported compensation on the 2024 filing was $109K, to Tanya Zastrow (OBS Executive Director).
Frequently asked questions about Olbrich Botanical Society Foundation Inc
How much does Olbrich Botanical Society Foundation Inc give each year?
Olbrich Botanical Society Foundation Inc gave $336K across 1 grant in 2024, according to its 2024 IRS Form 990. In 2023 it gave $326K across 1 grant.
How large is Olbrich Botanical Society Foundation Inc?
Olbrich Botanical Society Foundation Inc reported $9.6M in total assets on its 2024 IRS Form 990. Its revenue that year was $1.2M.
What is Olbrich Botanical Society Foundation Inc?
Olbrich Botanical Society Foundation Inc is a public charity focused on Environment & Animals, based in Madison, WI. It holds $9.6M in total assets as of 2024.
Where does Olbrich Botanical Society Foundation Inc operate?
Olbrich Botanical Society Foundation Inc has awarded grants in Wisconsin.
What is Olbrich Botanical Society Foundation Inc's EIN?
Olbrich Botanical Society Foundation Inc's EIN (Employer Identification Number) is 39-2002821. IRS Form 990 filing data is available on this page for 2020–2024.
Data last updated September 2026. Sourced from IRS Form 990 filings.
Data update history
(6)
When this profile's IRS filing data changed on Grantable
- Updated Form 990 for fiscal year 2020 (received by the IRS November 8, 2021)
- Updated Form 990 for fiscal year 2021 (received by the IRS November 11, 2022)
- Updated Form 990 for fiscal year 2022 (received by the IRS November 7, 2023)
- Updated Form 990 for fiscal year 2023 (received by the IRS November 12, 2024)
- Updated Form 990 for fiscal year 2024 (received by the IRS November 10, 2025)
- IRS filings on file for fiscal years 2020–2024
Live grants for the work Olbrich Botanical Society Foundation Inc funds
Environment & Animals Open opportunities, soonest deadline first.
Explore Open Grants
Browse active grant opportunities in Olbrich Botanical Society Foundation Inc's focus areas in our free grants database
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