Mission
THE NSS IS DEDICATED TO THE SCIENTIFIC STUDY OF CAVES AND KARST PROTECTING CAVES THROUGH CONSERVATION OWNERSHIP STEWARDSHIP EDUCATION AND PROMOTING RESPONSIBLE CAVE EXPLORATION CAVER FELLOWSHIP.
Public Charity
National Speleological Society
National Speleological Society is a nonprofit organization categorized as Public Charity based in Huntsville, AL. Its most recent IRS filing (2025) reports revenue of $2.4M, expenses of $1.5M, total assets of $13.8M. Imperigo tracks 3 reported grant relationships connected to this organization totaling approximately $24K.
EIN: 546026867
Huntsville, AL
Recreation & Sports N.E.C.
NTEE: N99
Latest filing: 2025
Total Revenue$2.4M
Total Expenses$1.5M
Total Assets$13.8M
Grant Records3
Funding Total$24K
Filing Years2020–2025
Where $100 goes at National Speleological Society
How National Speleological Society divides every $100 it spends, from its own Form 990 filings, averaged across 8 years.
$67
Programs
the work itself
$33
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 $67 for programs
$45
The nss holds conventions seminars and cave rescue training
$17
Periodic publications distriubted free to members including journals magazines manuals ebsite and annual compoilation of cave activities
$5
Grants and awards for research science education and exploration of caves and cave biology
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
RALPH W. STONE RESEARCH FUND
$5,500
RALPH W. STONE RESEARCH FUND
$5,500
SEE 2 IN TOP THREE
$12,654
Showing up to 5 of 3 total records — full history available with membership.
Officers & Directors
Director
Anna Pearce
Director
Aria Mildicr
Director
Dennis Melko
Director
Josh Schultz
Director
Michael Mansur
Director
Mike Backe
Officer compensation and complete director data available with membership.
Top Grant Purposes
Financial Trends
| Year | Revenue | Expenses | Assets |
|---|---|---|---|
| 2025 | $2.4M | $1.5M | $13.8M |
| 2024 | $2.3M | $1.1M | $13.0M |
| 2023 | $2.0M | $782K | $11.8M |
| 2021 | $2.4M | $448K | $8.9M |
| 2020 | $1.2M | $807K | $7.0M |
Between 2020 and 2025, reported annual revenue grew from $1.2M to $2.4M (+101%), with total assets most recently reported at $13.8M.
Interactive year-over-year charts and full filing details available with membership.