International Society on Thrombosis and Haemostasis
Also known as Isth
International Society on Thrombosis and Haemostasis reported $12.8 million in revenue and $11.9 million in expenses for calendar year 2025. Of every $100 it spent, $80.01 went to program services, $17.36 to management and general costs and $2.63 to fundraising. Its largest source of revenue was program service revenue such as fees, sales and contracts: 70.9% of the total. The highest compensation it reported for one person was $440,035 (EXECUTIVE DI). 6 people received more than $100,000 in reportable compensation. Revenue rose 2% between 2019 and 2025. Source: Form 990, 2025.
Where $100 of spending went
Calendar year 2025 · Form 990, Part IX, line 25 · total expenses $12MFor context, the median across 2,433 covered unclassified charities: $88.27 programs, $11.68 management, $0.05 fundraising (medians computed separately, so they may not sum to $100).
Where $100 of revenue came from
Calendar year 2025 · Form 990, Part VIII · total revenue $13M- Contributions & grants (non-government)$18.44 $2.4M
- Program service revenue$70.94 $9.1M
- Investment income$10.62 $1.4M
Other revenue was negative: −$690. The bar shows the positive sources only.
The 990 scorecard · same measures for every charity, no grades
| Measure | 2025 | Median |
|---|---|---|
| Program services Part IX 25(B) ÷ 25(A) | 80.0% | 86.7% |
| Management & general Part IX 25(C) ÷ 25(A) | 17.4% | 11.5% |
| Fundraising Part IX 25(D) ÷ 25(A) | 2.6% | 0.0% |
| Fundraising cost per $1 of contributions Part IX 25(D) ÷ Part VIII 1h | $0.13 | $0.01 |
| Contributions & grants share of revenue Part VIII 1h ÷ 12 | 18.4% | 29.9% |
| Government grants share of revenue Part VIII 1e ÷ 12 | 0.0% | 3.8% |
| Program service revenue share Part VIII 2g ÷ 12 | 70.9% | 58.9% |
| Highest reported compensation Part VII-A, columns D–F | $440,035 | $301,601 |
| Highest compensation as share of expenses Part VII-A ÷ Part IX 25(A) | 3.68% | 1.38% |
| People paid over $100,000 Part VII, line 2 | 6 | 6 |
| Net assets, in months of expenses Part X 33(B) ÷ monthly expenses | 15.3 | 6.8 |
| Independent voting board members Part VI 1a–1b | 21 of 21 | 100.0% |
A median is context, not a target: hospitals, universities, food banks and grantmakers spend in very different ways. What these measures can and can't tell you.
What the money paid for, in its own words
2025 · Form 990, Part III · the three largest programs by expenseThe International Society on thrombosis and haemostsis xxxiii congress and 71st meeting of the scientific and standardization committee took place in-person (washington dc) and virtually june 21-25, 2025. The scientific program included expert presentations, educational, poster, technical, and ssc subcommittee sessions as well as submission and presentation of abstracts. Isth congresses are open to the global scientific community in the field of thrombosis and haemostasis. Many of the proceedings of the congress are available via open access through the society's journal and website
Education symposia led by expert members in industrialized and developing countries, fellowships and training courses for early career professionals from both industrialized and developing countries, webinars, webcasts and on-line courses developed by internationally recognized experts, support for abstract presenters from developing countries to attend annual meetings
Advocacy: world thrombosis day (wtd) is a global initiative increasing awareness of blood clots-their causes, risk factors, symptoms, prevention, and treatment-to reduce thrombosis-related death and disability. As a who non-state actor, isth integrates the latest coagulation research into public health decision-making to improve patient outcomes. As a founding member of etha, we unite leading organizations to advance thrombosis and hemostasis policy, education, and research across europe
Highest reported compensation
2025 · Form 990, Part VII, Section A · roles as filed; names are in the filing, not here| Role | From this org | From related orgs | Other | Total |
|---|---|---|---|---|
| EXECUTIVE DI Key employee, 40.00 hrs/week | $385,551 | $0 | $54,484 | $440,035 |
| DIR MEMBRSHI Highest compensated employee, 40.00 hrs/week | $198,498 | $0 | $31,220 | $229,718 |
| DIR FINANCE Highest compensated employee, 40.00 hrs/week | $185,289 | $0 | $35,678 | $220,967 |
| DIR PROGRAMS Highest compensated employee, 40.00 hrs/week | $171,593 | $0 | $42,627 | $214,220 |
| DIR MEETINGS Highest compensated employee, 40.00 hrs/week | $192,528 | $0 | $20,849 | $213,377 |
| DIR PEOPLE C Highest compensated employee, 40.00 hrs/week | $165,205 | $0 | $33,626 | $198,831 |
| DIRECTOR Director/trustee, 1.00 hrs/week | $3,000 | $0 | $0 | $3,000 |
6 people received more than $100,000 in reportable compensation from International Society on Thrombosis and Haemostasis (Part VII, line 2). Compensation of current officers, directors and key employees totaled $386K (Part IX, line 5).
7 years of filings
Form 990, Parts I, VII, IX and X · each row is that year's own filing, linkedGovernance answers, as filed
2025 · the organization's own yes/no answers; explanations, if any, are in Schedule O of the filing · what each means- Voting board members, and how many are independent Part VI, lines 1a–1b21 · 21 independent
- Audited financial statements Part XII 2bNo
- Conflict-of-interest policy Part VI 12aYes
- Whistleblower policy Part VI 13Yes
- Document retention policy Part VI 14Yes
- Independent process for top executive pay Part VI 15aYes
- Board given the 990 before filing Part VI 11aYes
- Family or business ties among insiders Part VI 2No
- Aware of a significant diversion of assets Part VI 5No
- Excess benefit transaction with an insider Part IV 25aNo
- Loans to or from insiders outstanding Part IV 26No
- Lobbying, or a 501(h) election in effect Part IV 4No
- Over $15,000 of professional fundraising services Part IV 18No
- Over $10,000 of activity outside the U.S. Part IV 14bYes
- Employees Part I, line 536
- Volunteers Part I, line 6175
Largest outside contractors
2025 · Form 990, Part VII, Section B · businesses only| HIGHER LOGIC LLC Online platform | $152,113 |
Individuals listed as contractors are left out. 1 contractors were paid more than $100,000 in all.
Private foundation grants it received
1 private foundation reported grants to International Society on Thrombosis and Haemostasis totaling $88 on their tax year 2023 Form 990-PF returns. See which foundations, on WHOFUNDS.
Source: WHOFUNDS open grant graph, matched from Form 990-PF Part XV.
Correct a figure or respond
Every number above is copied from International Society on Thrombosis and Haemostasis's own Form 990. If one doesn't match the filing, that's our error and we'll fix it. If you work for International Society on Thrombosis and Haemostasis, you can publish a response that is linked from this page.
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Of every $100 International Society on Thrombosis and Haemostasis spent in 2025, $80.01 went to programs. The full breakdown, from its IRS Form 990:
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All unclassified charities · Largest charities in North Carolina
Questions people ask
How much of International Society on Thrombosis and Haemostasis's spending goes to programs?
In calendar year 2025, International Society on Thrombosis and Haemostasis reported that 80.0% of its $11.9 million in expenses went to program services, 17.4% to management and general and 2.6% to fundraising (Form 990, Part IX).
How much does International Society on Thrombosis and Haemostasis pay its top executive?
The largest total compensation International Society on Thrombosis and Haemostasis reported for one person in calendar year 2025 was $440,035, for the role of EXECUTIVE DI (Form 990, Part VII, including compensation from related organizations and other compensation).
Where does International Society on Thrombosis and Haemostasis get its money?
Of $12.8 million in revenue in calendar year 2025, 18.4% came from contributions and grants and 70.9% from program service revenue (Form 990, Part VIII).
Is International Society on Thrombosis and Haemostasis a registered charity?
The IRS lists EIN 23-7428305 as a 501(c)(3) organization (publicly supported organization (170(b)(1)(a)(vi))), and its records show contributions as tax-deductible. Form 990 filings on record here cover tax years 2019, 2020, 2021, 2022, 2023, 2024, 2025. A filing shows what the organization reported; it doesn't by itself show whether a program works.
Sources
- 2025: Form 990 for calendar year 2025, object 202631129349300118 · read the filing · XML
- 2024: Form 990 for calendar year 2024, object 202532249349301858 · read the filing
- 2023: Form 990 for calendar year 2023, object 202421669349301212 · read the filing
- 2022: Form 990 for calendar year 2022, object 202323049349303002 · read the filing
- 2021: Form 990 for calendar year 2021, object 202222449349300322 · read the filing
- 2020: Form 990 for calendar year 2020, object 202141729349300824 · read the filing
- 2019: Form 990 for calendar year 2019, object 202022409349300717 · read the filing
All filings for EIN 23-7428305: ProPublica Nonprofit Explorer · IRS Tax Exempt Organization Search. Figures are as the organization reported them; we have not audited them.