Liabilities / Assets
44th percentile
Higher debt load relative to assets than 44% of similar nonprofits.
EIN 23-1496016 • 501(c)3 • Philadelphia, PA
Profile
To convey useful mathematical knowledge to other professionals who could implement mathematical theory for practical, industrial or scientific use. Siam's goals are - (1) to advance the application of mathematics and computational science to engineering, industry, science and society; (2) to promote research that will lead to effective new mathematical and computational methods and techniques for science, engineering, industry and society; and (3) to provide media for the exchange of information and ideas among mathematicians, engineers and scientists.
Precomputed percentiles relative to similar nonprofits. These scores are descriptive rather than judgmental.
Liabilities / Assets
44th percentile
Higher debt load relative to assets than 44% of similar nonprofits.
Liabilities / Revenue
67th percentile
Higher debt load relative to revenue than 67% of similar nonprofits.
Net Margin
30th percentile
Higher net margin than 30% of similar nonprofits.
Top Officer Pay
62nd percentile
Higher top officer pay than 62% of similar nonprofits.
Top officer pay equals 2.5% of source-year revenue.
Asset Growth
58th percentile
Faster asset growth than 58% of similar nonprofits.
Revenue Growth
64th percentile
Faster revenue growth than 64% of similar nonprofits.
Assets
Up$61,103,168
Up $4,528,041 (+8.0%) from 2023
Liabilities
Up$11,373,685
Up $1,493,237 (+15%) from 2023
Net Assets
Up$49,729,483
Up $3,034,804 (+6.5%) from 2023
Revenue
Up$17,724,481
Up $2,288,547 (+15%) from 2023
Expenses
Up$17,877,072
Up $2,714,561 (+18%) from 2023
Net Income
Down-$152,591
Down $426,014 (-156%) from 2023
Most recent year
2024 • Form 990Facts available. Structured filing facts are available, but richer extracted sections are limited.
Incorporated in 1952 as a non-profit organization, siam has worked toward the following goals for more than 60 years:- to advance the application of mathematics and computational science to engineering, industry, science, and society;-to promote research that will lead to effective new mathematical and computational methods and techniques for science, engineering, industry, and society;- to provide media for the exchange of information and ideas among mathematicians, engineers, and scientists.
Siam's mission is to advance and raise awareness about applied math and related fields through its books, journals, conferences, online resources, and a variety of programs and initiatives.
| Line | Beginning | End | Change |
|---|---|---|---|
| Assets | |||
| Investments in Publicly Traded Securities | $51,324,810 | $55,162,250 | ▲ $3,837,440 |
| Savings and Temporary Cash Investments | $1,443,302 | $1,507,062 | ▲ $63,760 |
| Land, Buildings, and Equipment, Net | $743,882 | $1,329,566 | ▲ $585,684 |
| Accounts Receivable | $537,338 | $1,164,697 | ▲ $627,359 |
| Prepaid Expenses and Deferred Charges | $1,180,070 | $508,227 | ▼ $671,843 |
| Inventories for Sale or Use | $420,297 | $443,296 | ▲ $22,999 |
| Pledges and Grants Receivable | $197,972 | $295,626 | ▲ $97,654 |
| Cash and Non-Interest-Bearing Accounts | $294,094 | $248,648 | ▼ $45,446 |
| Total Assets | $56,575,127 | $61,103,168 | ▲ $4,528,041 |
| Other Assets Total | $433,362 | $443,796 | ▲ $10,434 |
| Liabilities | |||
| Deferred Revenue | $6,442,990 | $6,330,796 | ▼ $112,194 |
| Accounts Payable and Accrued Expenses | $1,744,830 | $2,739,155 | ▲ $994,325 |
| Mortgage Notes Payable Secured by Investment Property | $405,865 | $1,552,240 | ▲ $1,146,375 |
| Other Liabilities | $853,401 | $751,494 | ▼ $101,907 |
| Escrow Account Liability | $433,362 | $0 | ▼ $433,362 |
| Total Liabilities | $9,880,448 | $11,373,685 | ▲ $1,493,237 |
| Net Assets / Fund Balance | |||
| Net Assets Without Donor Restrictions | $44,538,929 | $47,287,709 | ▲ $2,748,780 |
| Net Assets With Donor Restrictions | $2,155,750 | $2,441,774 | ▲ $286,024 |
| Total Net Assets Fund Balance | $46,694,679 | $49,729,483 | ▲ $3,034,804 |
| Total Liabilities and Net Assets / Fund Balance | $56,575,127 | $61,103,168 | ▲ $4,528,041 |
| Asset | Book Value | Depreciation | Basis |
|---|---|---|---|
| Buildings | $295,926 | $4,192,429 | $4,488,355 |
| Other Land Buildings | $869,898 | $1,611,194 | $2,481,092 |
| Equipment | $163,742 | $1,139,422 | $1,303,164 |
| Period | Beginning | Contrib. | Gain/Loss | Other Uses | End |
|---|---|---|---|---|---|
| 2024 | $452,771 | - | ▲ $26,586 | $13,880 | $465,477 |
| 2023 | $393,377 | - | ▲ $71,963 | $12,569 | $452,771 |
| 2022 | $497,593 | - | ▼ $89,593 | $14,623 | $393,377 |
| 2021 | $432,489 | - | ▲ $76,251 | $11,147 | $497,593 |
| 2020 | $391,755 | - | ▲ $53,194 | $12,460 | $432,489 |
| Name | Title | Full / Part Time | Base | Other | Total |
|---|---|---|---|---|---|
| Suzanne L Weekes | Chief Executive Officer | FT | $379,354 | $66,244 | $445,598 |
| Susan a Palantino | Chief Operating Officer | FT | $260,511 | $44,812 | $305,323 |
| Kivmars H Bowling | Director, Publications | FT | $209,674 | $38,198 | $247,872 |
| Lauren R Steidel | Controller | FT | $175,228 | $31,472 | $206,700 |
| Richard O Moore | Director, Programs and Services | FT | $170,940 | $31,195 | $202,135 |
| Matthew T Posey | Director, Information Services | FT | $173,825 | $6,296 | $180,121 |
| Abby K Addy | Director, Development | FT | $144,218 | $24,909 | $169,127 |
| Name | Title |
|---|---|
| Alison Ramage | Trustee -chairperson |
| Sven Leyffer | President |
| Carol Woodward | President Elect as of 01/24 |
| Sherry Li | Vice President at Large as of 01/24 |
| Lea Jenkins | Vice President for Education as of 01/24 |
| Ron Buckmire | Vice President for Equity, Diversity |
| Sharon Arroyo | Vice President for Industry |
| James G Nagy | Vice President for Programs |
| Howard Elman | Vice President for Publications |
| Alejandro Aceves | Vice President for Science Policy |
| Beatrice Riviere | Trustee |
| Bonita V Saunders | Trustee |
| Chi-wang Shu | Trustee |
| Jan Hesthaven | Trustee |
| Liliana Borcea | Trustee |
| Raymond Chan | Trustee |
| Ricardo Cortez | Trustee |
| Thomas a Grandine | Trustee |
| Ulrike Yang | Trustee |
| Cynthia Phillips | Trustee as of 01/24 |
| Karen Devine | Secretary as of 01/24 |
| Samuel Gubins | Treasurer |
| Contractor | Services | Location | Compensation |
|---|---|---|---|
| Lumina Datamatics INC | Composition/ Editing | DEPT CH 16508, Palatine, IL 60055 | $437,471 |
| Interactive Strategies | Website Content Planning/design & Develo | 1133 CONNECTICUT AVE NW STE 600, Washington, DC 20036 | $221,784 |
| Atypon Systems INC | Electronic Products Host | 5201 GREAT AMERICAN WAY STE 510, Santa Clara, CA 95054 | $160,656 |
| Lewis-burke Associates | Lobbying | 1341 G STREET NW 8TH FLOOR, Washington, DC 20005 | $146,273 |
| Emerging Strategy | Upskilling & Lifelong Learning For Stem | 4601 NORTH FAIRFAX DRIVE STE 1200, Arlington, VA 22203 | $119,500 |
| Line Item | Amount |
|---|---|
| Salaries, Compensation, and Employee Benefits | $9,451,009 |
| Other Expenses | $8,091,131 |
| Total Fundraising Expense | $538,554 |
| Grants and Similar Amounts Paid | $334,932 |
| Professional Fundraising Fees | $0 |
| Line Item | Program | Management | Fundraising | Total |
|---|---|---|---|---|
| Other Salaries and Wages | $4,381,283 | $2,182,563 | $308,193 | $6,872,039 |
| Conferences and Meetings | $873,882 | - | - | $873,882 |
| Other Employee Benefits | $446,451 | $310,648 | $36,947 | $794,046 |
| Current Officers, Directors, Trustees, and Key Employees | - | $750,921 | - | $750,921 |
| Office Expenses | $610,941 | $77,499 | - | $688,440 |
| Fees for Services Other | $347,447 | $271,860 | - | $619,307 |
| Advertising | $431,891 | $93,044 | $67,976 | $592,911 |
| Pension Plan Contributions | $325,735 | $187,861 | $26,957 | $540,553 |
| Payroll Taxes | $267,317 | $204,010 | $22,123 | $493,450 |
| Royalties | $491,873 | - | - | $491,873 |
| Occupancy | $341,028 | $74,863 | $27,652 | $443,543 |
| Travel | $403,418 | - | - | $403,418 |
| Depreciation Depletion | - | $317,015 | - | $317,015 |
| Other Expenses | $272,547 | $200,198 | $48,706 | $272,547 |
| Grants to Domestic Orgs | $189,304 | - | - | $189,304 |
| Fees for Services Lobbying | - | $146,273 | - | $146,273 |
| Foreign Grants | $109,936 | - | - | $109,936 |
| Insurance | - | $79,229 | - | $79,229 |
| Fees for Services Accounting | - | $35,760 | - | $35,760 |
| Grants to Domestic Individuals | $35,692 | - | - | $35,692 |
| Fees for Services Legal | - | $35,152 | - | $35,152 |
| Total Functional Expenses | $12,213,040 | $5,125,478 | $538,554 | $17,877,072 |
| Line Item | Amount |
|---|---|
| Total Expenses per Audited Statements | $18,108,012 |
| Expenses per Audited Statements | $17,877,072 |
| Total Expenses per Form 990 | $17,877,072 |
| Expenses Not Reported on Form 990 | $230,940 |
| Expenses Not Reported on Financial Statements | $0 |
| Recipient | Location | Category | Purpose | Amount |
|---|---|---|---|---|
| University of Delaware | Newark, DE | 501(c)(3) | Undergradaute Summer Research Program | $43,018 |
| San Francisco State University | San Francisco, CA | 115 | Undergradaute Summer Research Program | $40,339 |
| Simpson College | Indianola, IA | 501(c)(3) | Undergradaute Summer Research Program | $37,260 |
| Purdue University | West Lafayette, IN | 501(c)(3) | Undergradaute Summer Research Program | $36,975 |
| Central Washington State University | Ellensburg, WA | Govt Entity | Undergradaute Summer Research Program | $31,712 |
| Region | Activity | Services | Offices | Employees | Spending |
|---|---|---|---|---|---|
| Europe (including Iceland & Greenland) - Albania, Andorra, Austria, Belgium | Grantmaking | Travel Awards (support) to Attend Meetings | 0 | 1 | $43,846 |
| Europe (including Iceland & Greenland) - Albania, Andorra, Austria, Belgium | Grantmaking | Prize Award and Conference Travel Assistance | 0 | 1 | $18,062 |
| East Asia and the Pacific - Australia, Brunei, Burma, Cambodia, | Grantmaking | Travel Awards (support) to Attend Meetings | 0 | 3 | $9,325 |
| North America - Canada and Mexico, But Not the United States | Grantmaking | Travel Awards (support) to Attend Meetings | 0 | 1 | $6,725 |
| East Asia and the Pacific - Australia, Brunei, Burma, Cambodia, | Program Services | Prize Award and Conference Travel Assistance | 0 | 1 | $5,420 |
| South Asia - Afghanistan, Bangladesh, Bhutan, India, Maldives, Nepal, | Grantmaking | Travel Awards (support) to Attend Meetings | 0 | 1 | $4,725 |
| Middle East and North Africa - Algeria, Bahrain, Djibouti, Egypt, | Grantmaking | Travel Awards (support) to Attend Meetings | 0 | 1 | $4,096 |
| Line Item | Amount |
|---|---|
| Professional Fundraising Fees | $0 |
| Liability | Amount |
|---|---|
| Accrued Vacation/unemployment | $695,220 |
| Flexible Benefit Plan | $38,819 |
| Rental Escrow | $17,455 |
“The society for industrial and applied mathematics (siam) is an international community of over 13,600 individual members; likewise, over 330 academic, manufacturing, research and development, service and consulting organizations, government, and military organizations worldwide are institutional members.”
“Pursuant to the society's bylaws, three trustees shall be elected annually by dues-paying members of siam for three-year terms. Additionally, the president, vice president at large, and secretary shall be elected by the dues-paying membership of siam.”
“The membership votes on any changes in governance.”
“The form 990 was prepared by an independent accounting firm in conjunction with the organization's financial department. A copy of the draft 990 was circulated to the full board of trustees for discussion and comment. Each board member was provided ample opportunity to comment on the information contained in the 990 prior to its electronic filing with the internal revenue service.”
“Each officer, director, trustee, and key employee of siam is required to annually disclose any conflicts of interest that arise by virtue of their employment, board service, or position with siam. Siam monitors compliance with its conflict of interest policy through a semi-annual disclosure statement that is distributed to these individuals. Potential conflicts are investigated immediately.”
“Siam undertakes a thorough process to ensure that the executive compensation paid to its executive director and all officers and key employees is reasonable given the market in which siam operates. In relevant part, the board of directors has established a human resource committee of independent persons with no personal interest in the proposed compensation agreement. On a periodic basis, the human resource committee contracts with a compensation consultant to complete a market assessment and competitive position analysis for siam's top executives. In addition, the human resource committee utilizes comparability and benchmarking surveys to ensure that siam compensates its executives commensurate with the market. The human resource committee then reports their salary decisions for the ceo and key employees to the board.”
“The taxpayer makes its form 990 available to the public by retaining a copy at its place of business. The form 990 is likewise published on the internet at www.guidestar.org. A review of the organization's financial statements is presented at the annual business meeting of siam's membership and is posted on the siam website. Also available on the siam website are the organization's governing documents. The conflict of interest policy is not ordinarily made available to the public, but, if requested, will be made available at management's discretion.”
“The process has not changed from prior year.”
“The society administers funds held by the international council for industrial and applied mathematics (iciam) as well as the funds for the mathematical optimization society's (mos) tseng prize fund.”
“The society currently has one donor-restricted endowment fund. The principal purpose of that fund is to issue the w.t. And idalia reid prize in mathematics. The w.t. And idalia reid prize in mathematics is awarded annually for research in, or contributions to, the broadly defined areas of differential equations and controls theory.”
“Siam evaluated its uncertainty in income taxes for the year ended december 31, 2024. No tax liability for unrelated business income has been accrued as of december 31, 2024 and 2023, as siam did not earn significant net unrelated business income. Additionally, there are currently no examinations from federal or state taxing authorities in progress so siam had no accruals for interest and/or penalties related to uncertainty in income taxes.”
“Cost of goods sold 230,940.”
“Cost of goods sold 230,940.”
This appendix keeps the raw XML leaves available for debugging and edge-case review. The human report above is the primary experience.
| Path | # | Value |
|---|---|---|
| IRS990/AccountantCompileOrReviewInd | 0 | 0 |
| IRS990/AccountsPayableAccrExpnssGrp/BOYAmt | 0 | 1744830 |
| IRS990/AccountsPayableAccrExpnssGrp/EOYAmt | 0 | 2739155 |
| IRS990/AccountsReceivableGrp/BOYAmt | 0 | 537338 |
| IRS990/AccountsReceivableGrp/EOYAmt | 0 | 1164697 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | 0 |
| IRS990/ActivityOrMissionDesc | 0 | SIAM'S MISSION IS TO ADVANCE AND RAISE AWARENESS ABOUT APPLIED MATH AND RELATED FIELDS THROUGH ITS BOOKS, JOURNALS, CONFERENCES, ONLINE RESOURCES, AND A VARIETY OF PROGRAMS AND INITIATIVES. |
| IRS990/AdvertisingGrp/FundraisingAmt | 0 | 67976 |
| IRS990/AdvertisingGrp/ManagementAndGeneralAmt | 0 | 93044 |
| IRS990/AdvertisingGrp/ProgramServicesAmt | 0 | 431891 |
| IRS990/AdvertisingGrp/TotalAmt | 0 | 592911 |
| IRS990/AllOtherContributionsAmt | 0 | 1280035 |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | 1 |
| IRS990/AuditCommitteeInd | 0 | 1 |
| IRS990/BackupWthldComplianceInd | 0 | 1 |
| IRS990/BooksInCareOfDetail/BusinessName/BusinessNameLine1Txt | 0 | SUSAN PALANTINO |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 2153829800 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 3600 MARKET STREET 6TH FLOOR |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | PHILADELPHIA |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | PA |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 19104 |
| IRS990/BusinessRlnWith35CtrlEntInd | 0 | 0 |
| IRS990/BusinessRlnWithFamMemInd | 0 | 0 |
| IRS990/BusinessRlnWithOrgMemInd | 0 | 0 |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 294094 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 248648 |
| IRS990/ChangeToOrgDocumentsInd | 0 | 0 |
| IRS990/CntrctRcvdGreaterThan100KCnt | 0 | 6 |
| IRS990/CollectionsOfArtInd | 0 | 0 |
| IRS990/CompCurrentOfcrDirectorsGrp/ManagementAndGeneralAmt | 0 | 750921 |
| IRS990/CompCurrentOfcrDirectorsGrp/TotalAmt | 0 | 750921 |
| IRS990/CompensationFromOtherSrcsInd | 0 | 0 |
| IRS990/CompensationProcessCEOInd | 0 | 1 |
| IRS990/CompensationProcessOtherInd | 0 | 1 |
| IRS990/ConferencesMeetingsGrp/ProgramServicesAmt | 0 | 873882 |
| IRS990/ConferencesMeetingsGrp/TotalAmt | 0 | 873882 |
| IRS990/ConflictOfInterestPolicyInd | 0 | 1 |
| IRS990/ConservationEasementsInd | 0 | 0 |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | 0 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 0 | 437471 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 1 | 221784 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 2 | 160656 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 3 | 146273 |
| IRS990/ContractorCompensationGrp/CompensationAmt | 4 | 119500 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 0 | DEPT CH 16508 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 1 | 1133 CONNECTICUT AVE NW STE 600 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 2 | 5201 GREAT AMERICAN WAY STE 510 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 3 | 1341 G STREET NW 8TH FLOOR |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/AddressLine1Txt | 4 | 4601 NORTH FAIRFAX DRIVE STE 1200 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 0 | PALATINE |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 1 | WASHINGTON |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 2 | SANTA CLARA |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 3 | WASHINGTON |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/CityNm | 4 | ARLINGTON |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 0 | IL |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 1 | DC |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 2 | CA |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 3 | DC |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/StateAbbreviationCd | 4 | VA |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 0 | 60055 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 1 | 20036 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 2 | 95054 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 3 | 20005 |
| IRS990/ContractorCompensationGrp/ContractorAddress/USAddress/ZIPCd | 4 | 22203 |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 0 | LUMINA DATAMATICS INC |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 1 | INTERACTIVE STRATEGIES |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 2 | ATYPON SYSTEMS INC |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 3 | LEWIS-BURKE ASSOCIATES |
| IRS990/ContractorCompensationGrp/ContractorName/BusinessName/BusinessNameLine1Txt | 4 | EMERGING STRATEGY |
| IRS990/ContractorCompensationGrp/ServicesDesc | 0 | COMPOSITION/ EDITING |
| IRS990/ContractorCompensationGrp/ServicesDesc | 1 | WEBSITE CONTENT PLANNING/DESIGN & DEVELO |
| IRS990/ContractorCompensationGrp/ServicesDesc | 2 | ELECTRONIC PRODUCTS HOST |
| IRS990/ContractorCompensationGrp/ServicesDesc | 3 | LOBBYING |
| IRS990/ContractorCompensationGrp/ServicesDesc | 4 | UPSKILLING & LIFELONG LEARNING FOR STEM |
| IRS990/CostOfGoodsSoldAmt | 0 | 230940 |
| IRS990/CreditCounselingInd | 0 | 0 |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 2026646 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 334932 |
| IRS990/CYInvestmentIncomeAmt | 0 | 3641450 |
| IRS990/CYOtherExpensesAmt | 0 | 8091131 |
| IRS990/CYOtherRevenueAmt | 0 | 1175737 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 10880648 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | -152591 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 9451009 |
| IRS990/CYTotalExpensesAmt | 0 | 17877072 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 538554 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 17724481 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | 1 |
| IRS990/DeductibleArtContributionInd | 0 | 0 |
| IRS990/DeductibleNonCashContriInd | 0 | 0 |
| IRS990/DeferredRevenueGrp/BOYAmt | 0 | 6442990 |
| IRS990/DeferredRevenueGrp/EOYAmt | 0 | 6330796 |
| IRS990/DelegationOfMgmtDutiesInd | 0 | 0 |
| IRS990/DepreciationDepletionGrp/ManagementAndGeneralAmt | 0 | 317015 |
| IRS990/DepreciationDepletionGrp/TotalAmt | 0 | 317015 |
| IRS990/Desc | 0 | SIAM'S PUBLICATIONS ARE A MEANS OF MEETING ONE OF THE PRIMARY OBJECTIVES FOR ORGANIZING THE SOCIETY: TO PROVIDE MEDIA FOR THE EXCHANGE OF INFORMATION AND IDEAS BETWEEN MATHEMATICIANS AND OTHER SCIENTISTS. SIAM'S JOURNAL PROGRAM PRODUCES 18 QUALITY, PEER-REVIEWED JOURNALS THAT ARE RESPECTED AND HIGHLY CITED THROUGHOUT THE APPLIED MATHEMATICS AND COMPUTATIONAL SCIENCE COMMUNITY. SIAM PUBLISHES APPROXIMATELY 20 HIGH-QUALITY BOOKS A YEAR BY AUTHORS WHO ARE EXPERTS IN THEIR FIELD, MAKING RELEVANT RESEARCH RESULTS ACCESSIBLE TO INDUSTRY AND SCIENCE WHILE ALSO PROMOTING THE INTERACTION BETWEEN MATHEMATICS AND OTHER DISCIPLINES SUCH AS ENGINEERING, SCIENCE, AND COMPUTING. SIAM NEWS, PUBLISHED 10 TIMES PER YEAR, IS THE NEWS JOURNAL REPORTING ON ISSUES AND DEVELOPMENTS AFFECTING THE APPLIED AND COMPUTATIONAL MATHEMATICS COMMUNITY. SIAM ALSO PUBLISHES UNDERGRADUATE RESEARCH ONLINE (SIURO), AN OPEN-ACCESS PUBLICATION FOR UNDERGRADUATES. |
| IRS990/DescribedInSection501c3Ind | 0 | 1 |
| IRS990/DisregardedEntityInd | 0 | 0 |
| IRS990/DocumentRetentionPolicyInd | 0 | 1 |
| IRS990/DonorAdvisedFundInd | 0 | 0 |
| IRS990/DonorRestrictionNetAssetsGrp/BOYAmt | 0 | 2155750 |
| IRS990/DonorRestrictionNetAssetsGrp/EOYAmt | 0 | 2441774 |
| IRS990/DonorRstrOrQuasiEndowmentsInd | 0 | 1 |
| IRS990/ElectionOfBoardMembersInd | 0 | 1 |
| IRS990/EmployeeCnt | 0 | 97 |
| IRS990/EmploymentTaxReturnsFiledInd | 0 | 1 |
| IRS990/EngagedInExcessBenefitTransInd | 0 | 0 |
| IRS990/EscrowAccountLiabilityGrp/BOYAmt | 0 | 433362 |
| IRS990/EscrowAccountLiabilityGrp/EOYAmt | 0 | 0 |
| IRS990/ExpenseAmt | 0 | 5910643 |
| IRS990/FamilyOrBusinessRlnInd | 0 | 0 |
| IRS990/FederalGrantAuditRequiredInd | 0 | 0 |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 35760 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 35760 |
| IRS990/FeesForServicesLegalGrp/ManagementAndGeneralAmt | 0 | 35152 |
| IRS990/FeesForServicesLegalGrp/TotalAmt | 0 | 35152 |
| IRS990/FeesForServicesLobbyingGrp/ManagementAndGeneralAmt | 0 | 146273 |
| IRS990/FeesForServicesLobbyingGrp/TotalAmt | 0 | 146273 |
| IRS990/FeesForServicesOtherGrp/ManagementAndGeneralAmt | 0 | 271860 |
| IRS990/FeesForServicesOtherGrp/ProgramServicesAmt | 0 | 347447 |
| IRS990/FeesForServicesOtherGrp/TotalAmt | 0 | 619307 |
| IRS990/ForeignActivitiesInd | 0 | 1 |
| IRS990/ForeignFinancialAccountInd | 0 | 0 |
| IRS990/ForeignGrantsGrp/ProgramServicesAmt | 0 | 109936 |
| IRS990/ForeignGrantsGrp/TotalAmt | 0 | 109936 |
| IRS990/ForeignOfficeInd | 0 | 1 |
| IRS990/Form8282PropertyDisposedOfInd | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 0 | 7.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 1 | 7.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 2 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 3 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 4 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 5 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 6 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 7 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 8 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 9 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 10 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 11 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 12 | 1.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 13 | 36.25 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 14 | 36.25 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 15 | 7.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 16 | 7.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 17 | 7.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 18 | 7.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 19 | 7.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 20 | 7.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 21 | 7.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 22 | 7.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 23 | 7.50 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 24 | 36.25 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 25 | 36.25 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 26 | 36.25 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 27 | 36.25 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 28 | 36.25 |
| IRS990/Form990PartVIISectionAGrp/HighestCompensatedEmployeeInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/HighestCompensatedEmployeeInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/HighestCompensatedEmployeeInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/HighestCompensatedEmployeeInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/HighestCompensatedEmployeeInd | 4 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 4 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 5 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 6 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 7 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 8 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 9 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 10 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 11 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 12 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 4 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 5 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 6 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 7 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 8 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 9 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 10 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 11 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 12 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 13 | X |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 10 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 11 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 12 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 13 | 45994 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 14 | 44812 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 15 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 16 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 17 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 18 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 19 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 20 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 21 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 22 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 23 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 24 | 38198 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 25 | 31472 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 26 | 6296 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 27 | 31195 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 28 | 24909 |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | CAROL WOODWARD |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | SAMUEL GUBINS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | ALISON RAMAGE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | LILIANA BORCEA |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 4 | RAYMOND CHAN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 5 | ULRIKE YANG |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 6 | THOMAS A GRANDINE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 7 | JAN HESTHAVEN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 8 | RICARDO CORTEZ |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 9 | CYNTHIA PHILLIPS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 10 | BEATRICE RIVIERE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 11 | BONITA V SAUNDERS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 12 | CHI-WANG SHU |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 13 | SUZANNE L WEEKES |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 14 | SUSAN A PALANTINO |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 15 | SVEN LEYFFER |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 16 | SHERRY LI |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 17 | LEA JENKINS |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 18 | RON BUCKMIRE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 19 | SHARON ARROYO |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 20 | JAMES G NAGY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 21 | HOWARD ELMAN |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 22 | ALEJANDRO ACEVES |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 23 | KAREN DEVINE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 24 | KIVMARS H BOWLING |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 25 | LAUREN R STEIDEL |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 26 | MATTHEW T POSEY |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 27 | RICHARD O MOORE |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 28 | ABBY K ADDY |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 10 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 11 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 12 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 13 | 399604 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 14 | 260511 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 15 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 16 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 17 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 18 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 19 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 20 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 21 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 22 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 23 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 24 | 209674 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 25 | 175228 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 26 | 173825 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 27 | 170940 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 28 | 144218 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 4 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 5 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 6 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 7 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 8 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 9 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 10 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 11 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 12 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 13 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 14 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 15 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 16 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 17 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 18 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 19 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 20 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 21 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 22 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 23 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 24 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 25 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 26 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 27 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 28 | 0 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 0 | PRESIDENT ELECT AS OF 01/24 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | TREASURER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | TRUSTEE -CHAIRPERSON |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 4 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 5 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 6 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 7 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 8 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 9 | TRUSTEE AS OF 01/24 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 10 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 11 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 12 | TRUSTEE |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 13 | CHIEF EXECUTIVE OFFICER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 14 | CHIEF OPERATING OFFICER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 15 | PRESIDENT |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 16 | VICE PRESIDENT AT LARGE AS OF 01/24 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 17 | VICE PRESIDENT FOR EDUCATION AS OF 01/24 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 18 | VICE PRESIDENT FOR EQUITY, DIVERSITY |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 19 | VICE PRESIDENT FOR INDUSTRY |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 20 | VICE PRESIDENT FOR PROGRAMS |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 21 | VICE PRESIDENT FOR PUBLICATIONS |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 22 | VICE PRESIDENT FOR SCIENCE POLICY |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 23 | SECRETARY AS OF 01/24 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 24 | DIRECTOR, PUBLICATIONS |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 25 | CONTROLLER |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 26 | DIRECTOR, INFORMATION SERVICES |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 27 | DIRECTOR, PROGRAMS AND SERVICES |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 28 | DIRECTOR, DEVELOPMENT |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | 1 |
| IRS990/Form990TFiledInd | 0 | 1 |
| IRS990/FormationYr | 0 | 1952 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | 0 |
| IRS990/FSAuditedBasisGrp/SeparateBasisFinclStmtInd | 0 | X |
| IRS990/FSAuditedInd | 0 | 1 |
| IRS990/FundraisingActivitiesInd | 0 | 0 |
| IRS990/GainOrLossGrp/SecuritiesAmt | 0 | 2748776 |
| IRS990/GamingActivitiesInd | 0 | 0 |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 13 |
| IRS990/GovernmentGrantsAmt | 0 | 746611 |
| IRS990/GrantsToDomesticIndividualsGrp/ProgramServicesAmt | 0 | 35692 |
| IRS990/GrantsToDomesticIndividualsGrp/TotalAmt | 0 | 35692 |
| IRS990/GrantsToDomesticOrgsGrp/ProgramServicesAmt | 0 | 189304 |
| IRS990/GrantsToDomesticOrgsGrp/TotalAmt | 0 | 189304 |
| IRS990/GrantsToIndividualsInd | 0 | 1 |
| IRS990/GrantsToOrganizationsInd | 0 | 1 |
| IRS990/GrantToRelatedPersonInd | 0 | 0 |
| IRS990/GrossAmountSalesAssetsGrp/SecuritiesAmt | 0 | 3025525 |
| IRS990/GrossReceiptsAmt | 0 | 18232170 |
| IRS990/GrossRentsGrp/RealAmt | 0 | 102406 |
| IRS990/GrossSalesOfInventoryAmt | 0 | 1104969 |
| IRS990/GroupReturnForAffiliatesInd | 0 | 0 |
| IRS990/IncludeFIN48FootnoteInd | 0 | 1 |
| IRS990/IndependentAuditFinclStmtInd | 0 | 1 |
| IRS990/IndependentVotingMemberCnt | 0 | 13 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 14 |
| IRS990/IndoorTanningServicesInd | 0 | 0 |
| IRS990/InfoInScheduleOPartIIIInd | 0 | X |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InfoInScheduleOPartXIIInd | 0 | X |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 79229 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 79229 |
| IRS990/InventoriesForSaleOrUseGrp/BOYAmt | 0 | 420297 |
| IRS990/InventoriesForSaleOrUseGrp/EOYAmt | 0 | 443296 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 892674 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 892674 |
| IRS990/InvestmentInJointVentureInd | 0 | 0 |
| IRS990/InvestmentsPubTradedSecGrp/BOYAmt | 0 | 51324810 |
| IRS990/InvestmentsPubTradedSecGrp/EOYAmt | 0 | 55162250 |
| IRS990/IRPDocumentCnt | 0 | 395 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LandBldgEquipAccumDeprecAmt | 0 | 6943045 |
| IRS990/LandBldgEquipBasisNetGrp/BOYAmt | 0 | 743882 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 1329566 |
| IRS990/LandBldgEquipCostOrOtherBssAmt | 0 | 8272611 |
| IRS990/LegalDomicileStateCd | 0 | PA |
| IRS990/LessCostOthBasisSalesExpnssGrp/SecuritiesAmt | 0 | 276749 |
| IRS990/LessRentalExpensesGrp/RealAmt | 0 | 0 |
| IRS990/LoanOutstandingInd | 0 | 0 |
| IRS990/LobbyingActivitiesInd | 0 | 1 |
| IRS990/LocalChaptersInd | 0 | 1 |
| IRS990/MaterialDiversionOrMisuseInd | 0 | 0 |
| IRS990/MembersOrStockholdersInd | 0 | 1 |
| IRS990/MethodOfAccountingAccrualInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | 1 |
| IRS990/MinutesOfGoverningBodyInd | 0 | 1 |
| IRS990/MissionDesc | 0 | INCORPORATED IN 1952 AS A NON-PROFIT ORGANIZATION, SIAM HAS WORKED TOWARD THE FOLLOWING GOALS FOR MORE THAN 70 YEARS:-TO ADVANCE THE APPLICATION OF MATHEMATICS AND COMPUTATIONAL SCIENCE TO ENGINEERING, INDUSTRY, SCIENCE, AND SOCIETY;-TO PROMOTE RESEARCH THAT WILL LEAD TO EFFECTIVE NEW MATHEMATICAL AND COMPUTATIONAL METHODS AND TECHNIQUES FOR SCIENCE, ENGINEERING, INDUSTRY, AND SOCIETY;-TO PROVIDE MEDIA FOR THE EXCHANGE OF INFORMATION AND IDEAS AMONG MATHEMATICIANS, ENGINEERS, AND SCIENTISTS. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | 1 |
| IRS990/MoreThan5000KToOrgInd | 0 | 0 |
| IRS990/MortgNotesPyblScrdInvstPropGrp/BOYAmt | 0 | 405865 |
| IRS990/MortgNotesPyblScrdInvstPropGrp/EOYAmt | 0 | 1552240 |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 46694679 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 49729483 |
| IRS990/NetGainOrLossInvestmentsGrp/ExclusionAmt | 0 | 2748776 |
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