Georgia · Nonprofit
International Society of Arboriculture
International Society of Arboriculture (Georgia) receives grants from 2 organizations whose IRS filings report $27,049 to it, the largest being INTERNATIONAL SOCIETY OF ARBORICULT ROCKY MOUNTAIN CHAPTER ($26,723). 1 of them have funded it in more than one year.
- Revenue FY2024
- $12M
- Funders on record
- 2
- Grants received
- $27k
- Net assets
- $11M
What International Society of Arboriculture does
Mission
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.
As stated on its FY2024 Form 990.
Programs
Credentialing - Provide certification examination services for potential candidates and recertification services to existing credentials to support the professional development of the arborists. the credentialing program serves over 61,000 credentials in 45 countries. ISA certification programs managed over 600,000 continuing education units submitted by various credential holders. ISA provides qualification training workshops and credential testing services for participants.
$3,608,820 spent$4,911,496 earned by the program52% of program spendingEducational Products and Services - EPS manages the development and production of monthly publications for isa members, to disseminate timely and relevant articles, news, information, and research regarding trees and tree care. EGS develops and distributes educational materials for the industry, including publications, workshop curriculum, online learning courses, podcasts, and consumer and industry brochures. 6 issues of the arborist news were published, 6 issues of the arboriculture and urban forestry journal were published, and 3new publications were published: tree injection BMP, Arborists' certification study guide and ITCC rule book.
$472,303 spent$1,718,933 earned by the program7% of program spendingEvents - Operate educational events, including training workshops, conferences, tradeshows, and symposiums, to provide information regarding tree related subjects to members and attendees. ISA held it's Annual Conference and Trade Show in Atlanta in 2024. ISA provides for the International Tree Climbing Championship, North American Tree Climbing Competition, European Tree Climbing Competition, Asia-Pacific Tree Climbing Competition, and Latin America Tree Climbing Competition to highlight and demonstrate the various skills of arboricultural practitioners and tree climbing and creating awareness about the importance of trees and tree care to the public.
$1,674,026 spent$1,025,800 earned by the program24% of program spendingOther program services, not described on the e-filed return.
$1,176,888 spentof which $61,268 as grants$49,107 earned by the program17% of program spending
The 4 programs described on its FY2024 Form 990, listed largest first by expense. Program spending in total: $6,932,037.
The organization over time
Each line starts at 100 in 2017, so what you read is the shape rather than the size: 150 means half as much again as 2017, 50 means half. The number beside each label in the key is where it ended.
Balance sheet
Total assets and total liabilities at each year end, in dollars. The largest one-year move in total assets was 2020 to 2021, from $10M to $13M (+24%).
How it's funded, over time
Each bar is one year's revenue split into where it came from, and every bar is the same height — these are shares, not amounts, so a year that raised twice as much looks the same size. Hover a bar for the split.
Government-grant reliance: 2021 9%. Grants only. Government contracts and fees sit inside program revenue.
Surplus & reserves
Operating surplus or deficit each year, and months of liquidity in hand. 2 of the last 8 reported years ran a deficit.
reserve
Leadership and staff
The officers, directors, trustees and key employees listed on each return. Joined and no longer listed compare each filing with the year before, matching people by surname and first initial; a year after a gap, or a roster under three people, has no comparison.
Chief executive
Caitlyn Pollihan
CEO & Executive Director
As listed on its FY2024 Form 990.
Who funds it, year by year
2021 → 2023: the base held at 1 funder, grant income fell $12k → $326.
From the IRS filings of International Society of Arboriculture’s funders (the co-funder graph). Association, not causation. Trends are read to FY2023, the last fiscal year that has finished arriving. FY2024–FY2026 are still being filed and are shown unshaded; they do not move any figure on this page.
How concentrated its funding is
International Society of Arboriculture leans on a few funders — its largest provides 99% of grant income and the top three 100%; half comes from just 1 funder.
the vertical line marks half of all grant income — 1 funder to its left
99% of the income these shares are computed over arrives through pass-through sponsors or from payers whose filings do not say what kind of payment it is. Concentration is still measured over all of it, because the money is real; what it does not support is a claim about how many institutions have chosen to fund International Society of Arboriculture.
Largest funder’s share by year: 2021 100% · 2022 100% · 2023 100% — broadly stable.
“Effective funders” = inverse Herfindahl index (1 / Σ shareᵢ²) — the number of equal-sized funders that would give the same concentration. Trends are read to FY2023, the last fiscal year that has finished arriving. FY2024–FY2026 are still being filed and are shown unshaded; they do not move any figure on this page.
Where its funders are
International Society of Arboriculture draws 100% of its grant income from funders outside Georgia, across 2 states in all.
In-state vs out-of-state, by year
Funder states come from each funder’s own filing. Trends are read to FY2023, the last fiscal year that has finished arriving. FY2024–FY2026 are still being filed and are shown unshaded; they do not move any figure on this page.
Government funding International Society of Arboriculture receives
Grants and contracts to this organization from federal (USASpending) and state checkbooks, reconciled to its EIN. $3k on record.
- Registration for Meetings&Conf$3k
- Dues$585
- Registration & Identification$100
Federal grants vs contracts are distinguished; state line items keep their reported category. Matched by name + geography (the BMF), so coverage is partial and precision-first.
Organizations like International Society of Arboriculture
Organizations whose mission and program text most resemble this one, by semantic similarity over every organization in the US filings — the closest peers, and often the clearest route to shared or prospective funders.
In Georgia
Nationally
Read directly from this organization’s own Form 990, as neutral context.
Where the money goes
65% of spending goes to programs.
Governance
Footprint & structure
Files a return copy in 1 state
Screen this organization
A dated, signed PDF of the compliance screen for International Society of Arboriculture: IRS status (Business Master File, Publication 78, auto-revocation), the OFAC sanctions lists, the Internal Revenue Bulletin, and California registration, with the Rev. Proc. 2018-32 §8.01 reliance elements stated element by element. Generated from the current files at the moment you download it.
Screens are triage, not determinations; a source that cannot be read reports not screened, never clear. Screen this nonprofit · How the screen works · on the API as GET /api/screening/{ein}?format=pdf
Questions and answers
- Who funds International Society of Arboriculture?
- International Society of Arboriculture (Georgia) receives grants from 2 organizations whose IRS filings report $27,049 to it, the largest being INTERNATIONAL SOCIETY OF ARBORICULT ROCKY MOUNTAIN CHAPTER ($26,723). 1 of them have funded it in more than one year.
- How many funders does International Society of Arboriculture have?
- IRS filings report 2 organizations giving $27,049 in grants to International Society of Arboriculture, 1 of which have funded it in more than one year.
- Who is the largest funder of International Society of Arboriculture?
- INTERNATIONAL SOCIETY OF ARBORICULT ROCKY MOUNTAIN CHAPTER is the largest funder on record, with $26,723 in grants. The full list of funders is on this page.
- How can an organization like International Society of Arboriculture find more funders?
- Start with the funders already giving here, then look at the foundations that back similar organizations in Georgia. The funding by cause and by state pages list the largest funders for a given area and how to approach them.
These figures are read directly from IRS Form 990 / 990-PF e-file XML: this organization’s own return for FY2024 (financials across 2017–2024), and the filings of 2 funders that report grants to it. “On record” means captured in the filings we have parsed — a funder that does not e-file, or whose grant detail is not itemized, will not appear. Filings run roughly 12–24 months behind. Trends on this page end at FY2023, the last fiscal year that has finished arriving; later years are shown and marked, and move no figure. Data on this page was exported October 14, 2026. What this page cannot tell you · view filing