International Society of Arboriculture
The body behind the Certified Arborist credential and the science of tree care, setting the global standard for the profession that tends urban and community trees.
Financial profile
International Society of Arboriculture · EIN 37-1004119 · 501(c)(5)
| Fiscal year | Total revenue | Contributions | Program services | Total expenses | Net assets | Year end |
|---|---|---|---|---|---|---|
| FY2023 | $10,747,280 | $3,040,586 | $5,584,546 | $9,882,585 | $9,407,050 | Dec 2023 |
| FY2022 | $10,071,372 | $3,013,018 | $5,352,787 | $8,880,457 | $7,258,107 | Dec 2022 |
| FY2021 | $10,308,280 | $4,044,329 | $4,280,122 | $7,222,912 | $7,250,098 | Dec 2021 |
| FY2020 | $3,633,015 | $1,484,773 | $1,809,923 | $3,356,812 | $3,360,774 | Dec 2020 |
| FY2020 | $7,156,880 | $3,059,182 | $3,867,937 | $8,066,767 | $2,708,434 | Jun 2020 |
| FY2019 | $8,987,074 | $3,093,713 | $4,248,148 | $10,248,586 | $3,635,598 | Jun 2019 |
Figures exactly as reported. A blank cell was blank on the form. The fiscal year links to the filing.
Peer societies
Five societies International Society of Arboriculture is read alongside.
TCIA
Tree Care Industry Association
The trade association of commercial tree care companies, providing accreditation, safety standards, and…
21 companies named
SAF
Society of American Foresters
The national accrediting and credentialing body for the forestry profession, keeper of the Certified Forester…
29 companies named
NALP
National Association of Landscape Professionals
The national trade association of the landscape and lawn care industry, offering certification, advocacy, and…
13 companies named
ASLA
American Society of Landscape Architects
The professional society for landscape architects, founded 1899, advancing the design and stewardship of…
30 companies named
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AmericanHort
The national trade association for the horticulture industry, representing growers, retailers, and suppliers…
679 companies named
Who backs ISA
Every company International Society of Arboriculture names publicly as a supporter, exactly as published. Companies also named by other associations on Sociogene come first.
| Company | Support as published | Also named by |
|---|---|---|
| Milwaukee Tool | Meeting sponsor | AREAC APPA AGCA AGCC EEI +3 |
| Asplundh | Meeting sponsor | EEI IAEC |
| Husqvarna | Meeting sponsor | IA TCIA |
| Vertical Supply Group | Meeting sponsor | NRECA TCIA |
| Tracked Lifts | Meeting sponsor | TCIA |
| Weaver Arborist | Meeting sponsor | TCIA |
| Arborwear | Meeting sponsor | Only International Society of Arboriculture, so far |
| At Height | Meeting sponsor | Only International Society of Arboriculture, so far |
| BIK Boomtrucks | Exhibitor | Only International Society of Arboriculture, so far |
| Edelrid | Meeting sponsor | Only International Society of Arboriculture, so far |
| NJ Crane | Exhibitor | Only International Society of Arboriculture, so far |
| Petzl | Meeting sponsor | Only International Society of Arboriculture, so far |
| Teufelberger | Exhibitor | Only International Society of Arboriculture, so far |
| Yale Cordage | Meeting sponsor | Only International Society of Arboriculture, so far |
Sources: 1 published list, read September 2026
2026 International Tree Climbing Championship sponsors. Read September 27, 2026. ITCC 2026 event sponsors and Arbor Fair vendors only; no public sponsor list found for the 2026 Annual International Conference.
Who backs International Society of Arboriculture's peers, but not International Society of Arboriculture
Companies named publicly by at least one of International Society of Arboriculture's five peer societies, and not found in International Society of Arboriculture's reviewed public records.
The outside view
The body behind the Certified Arborist credential and the science of tree care, setting the global standard for the profession that tends urban and community trees.
- Authority
- Build
- Outward
- Operational
Their shape
The Citadel
Led from the center, built to endure.
The Citadel runs on clarity and decisiveness, its direction held by a strong center the whole organization moves behind. Its gift is speed and coherence, its challenge is leaning too heavily on the few at the middle.
Also reads toward The Guild and The League.
Strengths
Not an official page of International Society of Arboriculture. Sociogene does not consult. Everything here comes from public sources, dated and linked. Something wrong here? Tell us what we missed.