Mission
As a nonprofit IOOS Regional Association, GLOS provides end-to-end data services that support science, policy, management, and industry all around the Great Lakes region.
Public Charity
Great Lakes Observing System Regional Association
Great Lakes Observing System Regional Association is a Public Charity headquartered in Ann Arbor, MI. Financial data from the 2025 filing: $4.9M revenue, $4.8M expenses, $875K total assets. 1 publicly reported grants to this organization, totaling roughly $5K, appear in IRS filings.
EIN: 260711287
Ann Arbor, MI
Marine Science & Oceanography
NTEE: U21
Latest filing: 2025
Total Revenue$4.9M
Total Expenses$4.8M
Total Assets$875K
Grant Records1
Funding Total$5K
Filing Years2021–2025
Where $100 goes at Great Lakes Observing System Regional Association
How Great Lakes Observing System Regional Association divides every $100 it spends, from its own Form 990 filings, averaged across 8 years.
$93
Programs
the work itself
$7
Management
running the organization
$0
Fundraising
none reported
No fundraising costs are reported. That often means fundraising runs through a separate affiliated organization that files its own return.
Inside the $93 for programs
$93
GLOS coordinates a network of data users and data providers to improve the collection, management, and delivery of data across the Great Lakes region
Source: Form 990 filings with the IRS, latest fiscal year 2025. Shares are from the organization's reported expenses. Data by Imperigo; not affiliated with the IRS.
Sample Grants Received
BAD HABIT: HARMFUL ALGAL BLOOMS IN WESTERN LAKE ERIE
$5,000
Showing up to 5 of 1 total records — full history available with membership.
Officers & Directors
Director
Aaron Fisk
Treasurer
Annie Atkinson
Director
Heather Stirratt
Chief Executive Officer
Jennifer Boehme
Financial Manager
Josephine Grimaudo-Cacciatore
Director
Leon Carl
Officer compensation and complete director data available with membership.
Top Grant Purposes
Financial Trends
| Year | Revenue | Expenses | Assets |
|---|---|---|---|
| 2025 | $4.9M | $4.8M | $875K |
| 2024 | $4.2M | $4.1M | $694K |
| 2023 | $3.5M | $3.6M | $412K |
| 2022 | $4.8M | $5.0M | $1.2M |
| 2021 | $4.2M | $4.1M | $1.2M |
Between 2021 and 2025, reported annual revenue grew from $4.2M to $4.9M (+16%), with total assets most recently reported at $875K.
Interactive year-over-year charts and full filing details available with membership.