International Society for Solid State Ionics
Nonprofit profile at a glance
- EIN
- 812785724
- IRS 990-EZ coverage
- 2021–2025
- Forms available
- Form 990-EZ 2025
- Location
- Cambridge, MA, USA
- Phone
- 6172536890
- Rating
- 58
- Verdict
- MIXED
- Rating confidence
- Moderate
Reported finances
- Revenue
- $16,977
- Expenses
- $12,140
- Assets
- $121,423
- Liabilities
- $0
Source: IRS Form 990-EZ. Selected filing: tax year 2025. Amounts in USD.
Leadership & pay
14 people listed
Executive titles in this filing
- Bilge Yildiz (President)
- Tatsumi Ishihara (Vice President)
- Harry Tuller (Past President)
People named in this filing
- Bilge Yildiz (President)
- Tatsumi Ishihara (Vice President)
- Harry Tuller (Past President)
Selected names, not a complete roster or a statement of current roles. Open leadership details for the complete filed list.
Source: IRS Form 990-EZ. Selected filing: tax year 2025. Names and roles reflect this filing, not necessarily current officeholders.
Overview
Mission
Serve professionals and students in solid state ionics field. Co-organize International Conference in Solid State Ionics in alternate years. No expense in non-active year.
What it reported doing in 2025
Provide awards to scientists to recognize their contributions to the field of solid state ionics in alternate years
Operating model
- Revenue model
- Donor-supported. 100% of the money available for current operations came from contributions and gifts.
- Distribution model
- Hybrid. The nonprofit split its reported program spending across 72% for direct work, and 28% for grants.
The verdict
MIXED - The filed numbers largely add up and program spending has grown recently. A relatively small share of available resources goes toward mission work and a relatively small share of total spending goes to programs.
Rating breakdown
- Financial Efficiency: 34
- Transparency & Controls: 82
- Sustainability: 79
- Growth: 80
Detailed rating inputs
Financial Efficiency
- Mission deployment rate: 29.5%; rating input score 30
- Program expense ratio: 41.2%; rating input score 41
Transparency & Controls
- Consistency checks: 100%; rating input score 100; 51st percentile among comparable filings
- Major donor itemization: Limited
Sustainability
- Operating margin: 28.5%; rating input score 79; 79th percentile among comparable filings
- Total-asset coverage ratio: 10; rating input score 92; 92nd percentile among comparable filings
- Liabilities to assets ratio: 0; rating input score 66; 66th percentile among comparable filings
- Officer compensation ratio: 0%; rating input score 56; 56th percentile among comparable filings
Growth
- Program expense growth: 56.8% per year; rating input score 100; 93rd percentile among comparable filings
- Revenue growth: 99.8% per year; rating input score 100; 99th percentile among comparable filings
- Asset growth: -6.6% per year; rating input score 0; 22nd percentile among comparable filings
Details
- Where the money goes: 29.5% of revenue deployed · 41.2% of spending went to programs
- Governance: Filed governance answers
- Accomplishments: 3 filed program accomplishments · $5K in reported program spending
- Leadership: top reported pay $0 · 14 people listed
- Consistency: 9 of 9 current checks pass
- Schedules: 2 filed schedules
- Filing history: 5 filing years from 2021 to 2025
- Contacts: How to reach this organization
- People: Everyone the filings name, and which of them the filings identify by more than a name.
Key Signals
Signals prioritize questions for review. They are not findings of misconduct.
- Moderate — Financial Efficiency: Mission deployment rate scored 30/100.
- Moderate — Financial Efficiency: Program expense ratio scored 41/100.
- High — Growth: Asset growth scored 0/100.
- Review — Sustainability: Officer compensation ratio scored 56/100.