Olbrich Botanical Society Inc logo

Olbrich Botanical Society Inc

Public charity · Grantmaker Madison, WI EIN: 39-1357247 Website

Olbrich botanical gardens enriches lives and inspires people to live in harmony with the natural world. Olbrich botanical gardens is dedicated to the creation, conservation, and interpretation of gardens and plant collections hardy to the American midwest or native to the world's tropical forests for study, enjoyment, and public benefit. The public-private partnership of Olbrich Botanical Society and the city of madison parks division makes the mission possible.

Key facts about Olbrich Botanical Society Inc

In short: Olbrich Botanical Society Inc gave $546K across 1 grant in 2024 (avg $546K), mostly in Wisconsin. Source: 2024 IRS Form 990.

EIN
39-1357247
Latest 990 filing
Form 990, 2024
Annual giving (2024)
$545,575
Grants made (2024)
1
Average grant
$545,575
Median grant
$545,575
Total assets
$5,987,239
Primary geography
Wisconsin (100% of itemized 2024 grant dollars)

Data from IRS Form 990, 2024; updated September 2026.

Financial Overview

From 2024 IRS Form 990 · View filing

Total Assets

$6.0M

+16.9% YoY

Annual Giving

$546K

+6719.7% YoY

Grant Count

1

+0.0% YoY

Avg Grant Size

$546K

+6719.7% YoY

How Olbrich Botanical Society Inc gives

  • Giving grew 173% from 2021 to 2024. Method

From the foundation's IRS Form 990 filings. Methodology.

About Olbrich Botanical Society Inc

Based on IRS filings

Olbrich Botanical Society 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 $6.0M in total assets. In 2024, it awarded 1 grant totaling $546K. Net investment income was $174K.

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Geographic Focus

Where this funder awards grants

Grant Distribution by State

1state

Share of the 2024 grant dollars on its one itemized grant.

States

Cities

Madison

Giving Over Time

Total grant dollars and number of grants per year

$0$1M$2M$3M0 grants2020 1 grant2021 2 grants2022 1 grant2023 1 grant2024

From 2021 to 2024, annual grant giving ranged from $8K (2023) to $2.1M (2022). In 2024 it made 1 grant totaling $546K.

Grant Insights

How this funder distributes its grants

Top Recipients

Top recipient in 2024

Olbrich Botanical Society Foundation Inc: $546KOlbrich Botanical SocietyFoundation Inc$546K

The largest 2024 recipient was Olbrich Botanical Society Foundation Inc ($546K).

Grant Size Distribution

5 grants across all recorded years

2<$50K$50–100K1$100–250K$250–500K1$500K–1M1$1–5M$5M+

The most common grant size was under $50K: 2 grants of 5 (40%).

Giving History

Grant recipients and amounts by year

RecipientPurposeAmount
Olbrich Botanical Society Foundation Inc Madison, WIGeneral Support$545,575

Financial History

Multi-year comparison from IRS filings

Revenue
Expenses
Net Investment Income
$0$2M$4M$6M2020 2021 2022 2023 2024
Metric202420232022
Total Assets$5,987,239$5,121,944$4,637,187
Revenue$3,667,076$2,960,788$3,136,331
Expenses$3,419,089$2,566,516$4,699,529
Net Investment Income$173,716$92,543$56,332

Data update history

When this profile's IRS filing data changed on Grantable

  1. Updated Form 990 for fiscal year 2021 (received by the IRS November 11, 2022)
  2. Updated Form 990 for fiscal year 2022 (received by the IRS November 7, 2023)
  3. Updated Form 990 for fiscal year 2023 (received by the IRS November 11, 2024)
  4. Updated Form 990 for fiscal year 2024 (received by the IRS November 4, 2025)
  5. IRS filings on file for fiscal years 2020–2024

Leadership & Key People

Officers and directors from IRS filings

Olbrich Botanical Society Inc is led by Tanya Zastrow, Executive Director on every filing since 2021; 1 of 16 officers listed in 2024 is compensated.

Officers on the 2024 filing

  • Tanya Zastrow

    Executive Director

    On filings since 2021

    40 hrs/week

    $13K (2021) → $109K (2024)

  • Alnisa Allgood

    President

    Director → Vice President, 2021

    Vice President → President, 2023

    On filings since 2020

    1 hr/week

    No compensation reported

  • Julie Bernauer

    Director

    On filings since 2021

    1 hr/week

    No compensation reported

  • Juscha Robinson

    Director

    On filings since 2021

    1 hr/week

    No compensation reported

  • Sandra H. Statz

    Director

    On filings since 2021

    1 hr/week

    No compensation reported

  • Bill Patek

    Director

    On filings since 2022

    1 hr/week

    No compensation reported

  • Matt Cornwell

    Director

    On filings since 2022

    1 hr/week

    No compensation reported

  • Caren Lewis

    Director

    New on the 2024 filing

    1 hr/week

    No compensation reported

  • John Manzer

    Director

    New on the 2024 filing

    1 hr/week

    No compensation reported

  • Maureen Martin

    Director

    New on the 2024 filing

    1 hr/week

    No compensation reported

  • Michele Miller Hayes

    Director

    New on the 2024 filing

    1 hr/week

    No compensation reported

  • Mike Maddox

    Director

    New on the 2024 filing

    1 hr/week

    No compensation reported

  • Laura Peterson

    Treasurer

    Director → Treasurer, 2022

    On filings since 2020

    1 hr/week

    No compensation reported

  • Philip Bradbury

    Past President

    Vice President → President, 2021

    President → Past President, 2023

    On filings since 2020

    1 hr/week

    No compensation reported

  • Susan Goodwin

    Vice President

    Director → Vice President, 2023

    On filings since 2020

    1 hr/week

    No compensation reported

  • Bethany Ordaz

    Secretary

    Director → Secretary, 2024

    On filings since 2021

    1 hr/week

    No compensation reported

Former officers (17)
  • Former: Betty Chewning (2020–2023) — Director & Executive Officio
  • Former: Eric Knepp (2020–2023) — Director & Executive Officio
  • Former: Julie Rupert (2020–2023) — Director
  • Former: Laurel Neverdahl (2020–2023) — Director & Executive Officio
  • Former: Liz Dannenbaum (2020–2023) — Director & Executive Officio
  • Former: Moira Harrington (2020–2023) — Director & Executive Officio
  • Former: Renee Boyce (2020–2023) — Director
  • Former: Maurice Sheppard (2021–2023) — Secretary
  • Former: William White (2020–2022) — Director
  • Former: Timothy W. Sherry (2022) — Director
  • Former: Brad Hinkfuss (2020–2021) — Director & Executive Officio
  • Former: Mary Phillips (2020–2021) — Treasurer
  • Former: Roberta Sladky (2020–2021) — Executive Director
  • Former: Tim Sherry (2020–2021) — Director
  • Former: Erik Lincoln (2020) — Director
  • Former: Kevin Hess (2020) — Director
  • Former: Richard Wagner (2020) — Director

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

Tanya Zastrow — Executive Director: $109KTanya ZastrowExecutive Director$109K

The highest reported compensation on the 2024 filing was $109K, to Tanya Zastrow (Executive Director).

Frequently asked questions about Olbrich Botanical Society Inc

How much does Olbrich Botanical Society Inc give each year?

Olbrich Botanical Society Inc gave $546K across 1 grant in 2024, according to its 2024 IRS Form 990. In 2023 it gave $8K across 1 grant.

How large is Olbrich Botanical Society Inc?

Olbrich Botanical Society Inc reported $6.0M in total assets on its 2024 IRS Form 990. Its revenue that year was $3.7M.

What is Olbrich Botanical Society Inc?

Olbrich Botanical Society Inc is a public charity focused on Environment & Animals, based in Madison, WI. It holds $6.0M in total assets as of 2024.

Where does Olbrich Botanical Society Inc operate?

Olbrich Botanical Society Inc has awarded grants in Wisconsin.

What is Olbrich Botanical Society Inc's EIN?

Olbrich Botanical Society Inc's EIN (Employer Identification Number) is 39-1357247. IRS Form 990 filing data is available on this page for 2020–2024.

Data last updated September 2026. Sourced from IRS Form 990 filings.

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