Is it real?
Yes. Never revoked by the IRS. Latest filing on record: FY2025. IRS ruling in Apr 1980.
IRS Pub. 78 · IRS Auto-Revocation List · IRS Business Master File
Where the money goes
80 cents of each dollar spent went to programs.
Form 990 Part IX, line 25, columns B–D. Every line is in By the numbers.
Something off? Claim to add context
Who runs it and what they're paid
42 people listed on the 990; $1.7M paid to officers and key staff (Part VII, Section A).
Tatiana Toro’s $331K as Director is at the 33rd percentile of top reported officer pay among 139 $10–100M science & technology nonprofits. Peer set: organizations in the same NTEE major field of work and revenue-size band, compared on each org’s own highest-paid officer/key-employee, from Form 990 Part VII / 990-PF Part VIII. Descriptive placement, not a verdict on whether the pay is appropriate.
Compensation history total reportable pay by year · 8 named individuals · Part VII
| Name | FY2025 | FY2024 | FY2023 | FY2022 | FY2021 | FY2020 |
|---|---|---|---|---|---|---|
| Tatiana Toro | $331,194 | $317,962 | $176,415 | — | — | — |
| Helene Barcelo | $244,389 | $306,008 | $315,947 | $293,194 | $289,215 | $268,468 |
| Annie Averitt | $232,388 | $231,725 | $241,646 | $223,308 | $207,566 | $201,632 |
| David Eisenbud | — | — | $214,237 | $175,185 | $181,450 | $134,476 |
| Aaron Hale | — | — | — | $203,951 | $196,035 | $187,395 |
| Stefanie Yurus | $178,750 | $176,246 | $176,732 | $151,145 | $148,765 | $144,599 |
| Demaur Owens | $148,207 | $147,321 | $145,679 | $120,433 | $105,410 | — |
| Arthur Bosse | $140,223 | $143,312 | $141,900 | $128,918 | $138,333 | $123,957 |
Total reportable compensation (Form 990 Part VII column D / Schedule J column E) by filing year, matched by name within this organization. The Schedule J base / bonus / deferred breakdown is not parsed into this dataset.
See Simons Laufer Mathematical Sciences Institute executive salaries →Questions the 990 asks
The form asks each of these directly. These are the filed answers.
- Family or business ties among officersPt VI · Ln 2Yes
- Top official's pay set by an independent reviewPt VI · Ln 15aYes
Programs and updates
Fosters mathematical research by bringing together top scientists for creative collaboration.
Questions for Simons Laufer Mathematical Sciences Institute
Your first name shows with your question. Simons Laufer Mathematical Sciences Institute answers here, for everyone.
Scientific Programs
Slmath conducts broadly-based research programs in the Mathematical Sciences and closely related fields. In any given year, slmath conducts between two and four thematic research programs, each lasting either 5 months or 10 months.
Form 990 Part III, line 4, FY2024. The organization’s own words, as filed with the IRS. Find it at the IRS (EIN 94-2650833) · Dispute this lineComputing and Communication
Slmath provides information technology (IT) resources and services to its researchers and the broader math community worldwide. Slmath maintains an IT platform that features the most advanced Mathematical software and that grants access to and supports virtual collaborative research amongst mathematicians at the Institute.
Form 990 Part III, line 4, FY2024. The organization’s own words, as filed with the IRS. Find it at the IRS (EIN 94-2650833) · Dispute this lineMath and Society Programs
Slmath sponsors a number of programs and activities with the goals to enhance both k-12 mathematics education and the public understanding of and appreciation for mathematics. These programs include supporting the bay area mathematics olympiad (bamo, a mathematics-related event for students in grade 12 or under), the mathical book prize…
Form 990 Part III, line 4, FY2024. The organization’s own words, as filed with the IRS. Find it at the IRS (EIN 94-2650833) · Dispute this lineFunders
Who pays for it.
From grant filings on record. Receipts are incomplete: individual donors are never listed.
Grants
Federal money
The auditor reported no findings.
The auditor reported no findings.
The auditor reported no findings.
The auditor reported no findings.
By the numbers
The FY2025 990, line by line.
Download 990
| Line | FY25 | FY24 | FY23 | FY22 | FY21 |
|---|---|---|---|---|---|
| End of yearLn 1g | $103.8M | $95.4M | $82.5M | $70.1M | $67.1M |
| AddedLn 1b | $3.6M | $7.7M | $10.4M | $7.3M | $36.3M |
| SpentLn 1d–1f | $2.8M | $1.5M | $1.1M | $1.0M | $615K |
| Line | Start FY25 | End FY25 |
|---|---|---|
| Cash and savingsLn 1–2 | $3.6M | $5.5M |
| InvestmentsLn 11–13 | $71.7M | $87.6M |
| Land, buildings, equipmentLn 10c | $5.1M | $4.8M |
| Total assetsLn 16 | $111.1M | $121.5M |
| LiabilitiesLn 26 | $1.0M | $630K |
| Net assetsLn 32 | $110.1M | $120.9M |
| Line | Total | Programs | Management | Fundraising |
|---|---|---|---|---|
| Grants to domestic individualsLn 2 | $4.7M | $4.7M | ||
| Grants and assistance to foreign recipientsLn 3 | $148K | $148K | ||
| Pay of officers and key staff (Part IX, line 5)Ln 5 | $1.1M | $679K | $280K | $155K |
| Other salaries and wagesLn 7 | $1.9M | $1.2M | $482K | $267K |
| Pension plan contributionsLn 8 | $191K | $113K | $57K | $22K |
| Other employee benefitsLn 9 | $396K | $234K | $118K | $45K |
| Payroll taxesLn 10 | $205K | $122K | $58K | $25K |
| Legal feesLn 11b | $24K | $210 | $24K | $1 |
| Accounting feesLn 11c | $94K | $85K | $9K | |
| Investment management feesLn 11f | $329K | $329K | ||
| Other fees for servicesLn 11g | $1.2M | $887K | $137K | $137K |
| Office expensesLn 13 | $88K | $57K | $9K | $22K |
| Information technologyLn 14 | $284K | $284K | $132 | |
| OccupancyLn 16 | $311K | $273K | $33K | $5K |
| TravelLn 17 | $58K | $30K | $3K | $25K |
| Depreciation, depletion and amortizationLn 22 | $418K | $379K | $34K | $6K |
| InsuranceLn 23 | $419K | $361K | $50K | $8K |
| Other expenses (24a–d)Ln 24 | $1.4M | $1.2M | $111K | $71K |
| All other expensesLn 24e | $60K | $11K | $50K | −$507 |
| Total functional expensesLn 25 | $13.4M | $10.7M | $1.9M | $795K |
Filing history
| Year | Money in | Money out | In minus out | Net assets | Download |
|---|---|---|---|---|---|
| FY2025 Latest ViewingFiled with the IRS May 12, 2026 | $19.1M | $13.4M | $5.8M | $120.9M | 990 PDF |
| FY2024Filed with the IRS Jun 10, 2025 | $22.5M | $14.2M | $8.3M | $110.1M | 990 PDF |
| FY2023Filed with the IRS Jun 12, 2024 | $21.9M | $14.0M | $7.8M | $99.8M | 990 PDF |
| FY2022Filed with the IRS Jun 13, 2023 | $21.4M | $13.3M | $8.1M | $89.2M | 990 PDF |
| FY2021Filed with the IRS Jun 15, 2022 | $45.8M | $8.4M | $37.4M | $84.8M | 990 PDF |
| FY2020Filed with the IRS Mar 19, 2022 | $9.3M | $10.6M | −$1.3M | $44.9M | 990 PDF |
Schedules filed Part IV
See the full FY2025 990
Part I · Summary $19,132,890 revenue, 12 lines filed
Part VI · Governance 29 of 31 board members independent, 1 to look at
Part VIII · Statement of revenue $19,132,890 across 9 lines filed
Part IX · Statement of functional expenses $13,365,361 across 19 lines filed
Part X · Balance sheet $121,544,753 assets, 17 lines filed
Part XI · Reconciliation of net assets $120,914,847 net assets at year end
Form 990 e-file FY2025 from the IRS (about our sources) · Classification, formation year and address from the IRS Business Master File
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