International Society of Arboriculture
Through research, technology, and education, the International Society of Arboriculture will promote the professional practice of arboriculture and foster a greater worldwide awareness of the benefits of trees.
Financial Overview
From 2024 IRS Form 990-PF · View filing
Total Assets
$15.6M
+8.6% YoY
Annual Giving
$61K
+0.8% YoY
Grant Count
1
+0.0% YoY
Avg Grant Size
$61K
+0.8% YoY
About International Society of Arboriculture
Based on IRS filings
International Society of Arboriculture is a nonprofit organization, based in ATLANTA, GA. IRS filing data is available from 2019 through 2024. As of 2024, the organization holds $15.6M in total assets. In 2024, it awarded 1 grants totaling $61K. Net investment income was $736K.
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Geographic Focus
Where this funder awards grants
Grant Distribution by State
States
Cities
Financial History
Multi-year comparison from IRS filings
| Metric | 2024 | 2023 | 2022 |
|---|---|---|---|
| Total Assets | $15,617,040 | $14,385,560 | $12,667,373 |
| Revenue | $11,573,930 | $10,747,280 | $10,071,372 |
| Expenses | $10,674,901 | $9,882,585 | $8,880,457 |
| Qualifying Distributions | — | — | — |
| Net Investment Income | $736,257 | $128,418 | — |
| Distributable Amount | — | — | — |
Giving Over Time
Total grant dollars and number of grants per year
Grant Insights
How this funder distributes its grants
Top Recipients
Top 1 recipients in 2024
Grant Size Distribution
5 grants across all recorded years
Giving History
Grant recipients and amounts by year
Among its reported 2024 grants, the largest include Tree Research and Education Endowment Fund ($61,268).
| Recipient | Purpose | Amount |
|---|---|---|
| Tree Research and Education Endowment Fund Naperville, IL | Support arboriculture research to benefit the professional arborists and unban foresters | $61,268 |
Leadership & Key People
Officers and directors from IRS filings
Compensation Overview
From 2024 IRS filing
From 2024 filing
| Name | Title | Hours | Compensation |
|---|---|---|---|
| Nicolaas Verloop | President(Upto Oct 24) | 15 | — |
| Thomas Smiley | President | 10 | — |
| Gail Nozal | Vice President(Upto Oct 24) | 5 | — |
| Randall Miller | Secretary (Upto Oct 24) | 5 | — |
| Sharon Jean-Philippe | President- Elect | 5 | — |
| Christopher Boza | Treasurer | 5 | — |
| John Gathright | Member(Upto Oct 24) | 5 | — |
| Carlos Llanos Rojas | Member(Upto Oct 24) | 5 | — |
| John Coles | Member | 5 | — |
| Samuel Ma | Member | 5 | — |
| Tadashi Touchi | Member | 5 | — |
| Susan Day | Member | 5 | — |
| Jason Grabosky | Member | 5 | — |
| Jessica Sanders | Vice President | 5 | — |
| Michael Watson | Member | 5 | — |
| Lori Brockelbank | Member (Served October-December) | 5 | — |
| Rebecca Johnson | Member (Served October-December) | 5 | — |
| Tim Walsh | Member (Served October-December) | 5 | — |
| Stephen Lane | Member (Served October-December) | 5 | — |
| Lauren Marshall | Member (Served October-December) | 5 | — |
| Caitlyn Pollihan | CEO & Executive Director | 40 | $359,703 |
| Freddie Harroway | Director of Finance | 40 | $132,600 |
| Chastity Austin | Director of Human Resources | 40 | $131,748 |
| Luana Vargas | Director of Credentialing | 40 | $126,776 |
| Alice Bagley | Director of Marketing | 40 | $118,310 |
| Jamie Vidich | Director of Educational Products | 40 | $116,931 |
Frequently Asked Questions
How large is International Society of Arboriculture?
As of 2024, International Society of Arboriculture holds $15.6M in total assets with $11.6M in annual revenue. It awarded 1 grants totaling $61K in 2024.
Where does International Society of Arboriculture operate?
International Society of Arboriculture has awarded grants in Illinois.
What size grants does International Society of Arboriculture award?
In 2024, International Society of Arboriculture awarded 1 grants totaling $61K — an average of about $61K per grant, based on its IRS Form 990 filings.
What is International Society of Arboriculture's EIN?
International Society of Arboriculture's EIN (Employer Identification Number) is 37-1004119. IRS Form 990 filing data is available on this page for 2019–2024.
Explore Open Grants
Browse active grant opportunities in International Society of Arboriculture's focus areas in our free grants database
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Data last updated April 2026. Sourced from IRS Form 990-PF filings.
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