Liabilities / Assets
81st percentile
Higher debt load relative to assets than 81% of similar nonprofits.
EIN 86-2147594 • 501(c)3 • San Francisco, CA
Profile
The Lost Women of Science Initiative has two related missions: To tell the story of female scientists who made groundbreaking achievements in their fields and to inspire girls and young women to embark on careers in STEM.
Precomputed percentiles relative to similar nonprofits. These scores are descriptive rather than judgmental.
Liabilities / Assets
81st percentile
Higher debt load relative to assets than 81% of similar nonprofits.
Liabilities / Revenue
81st percentile
Higher debt load relative to revenue than 81% of similar nonprofits.
Net Margin
11th percentile
Higher net margin than 11% of similar nonprofits.
Top Officer Pay
96th percentile
Higher top officer pay than 96% of similar nonprofits.
Top officer pay equals 25.3% of source-year revenue.
Asset Growth
18th percentile
Faster asset growth than 18% of similar nonprofits.
Revenue Growth
40th percentile
Faster revenue growth than 40% of similar nonprofits.
Assets
Down$161,648
Down $224,368 (-58%) from 2024
Liabilities
Flat$23,109
Flat from 2024
Net Assets
Down$138,539
Down $224,368 (-62%) from 2024
Revenue
Down$288,474
Down $42,025 (-13%) from 2024
Expenses
Up$512,842
Up $52,880 (+11%) from 2024
Net Income
Down-$224,368
Down $94,905 (-73%) from 2024
Most recent year
2025 • Form 990Detailed filing. Detailed filing data is available for this year.
The Lost Women of Science Initiative has two related missions: To tell the story of female scientists who made groundbreaking achievements in their fields and to inspire girls and young women to embark on careers in STEM.
| Line | Beginning | End | Change |
|---|---|---|---|
| Assets | |||
| Savings and Temporary Cash Investments | $324,009 | $86,250 | ▼ $237,759 |
| Cash and Non-Interest-Bearing Accounts | $62,007 | $75,398 | ▲ $13,391 |
| Loans From Officers Directors | $23,109 | $23,109 | → $0 |
| Accounts Receivable | - | $0 | - |
| Other Notes and Loans Receivable, Net | - | $0 | - |
| Pledges and Grants Receivable | - | $0 | - |
| Receivable From Disqualified Prsn | - | $0 | - |
| Receivables From Officers Etc | - | $0 | - |
| Investments Other Securities | - | $0 | - |
| Investments Program Related | - | $0 | - |
| Investments in Publicly Traded Securities | - | $0 | - |
| Land, Buildings, and Equipment, Net | - | $0 | - |
| Intangible Assets | - | $0 | - |
| Inventories for Sale or Use | - | $0 | - |
| Prepaid Expenses and Deferred Charges | - | $0 | - |
| Total Assets | $386,016 | $161,648 | ▼ $224,368 |
| Other Assets Total | - | $0 | - |
| Liabilities | |||
| Total Liabilities | $23,109 | $23,109 | → $0 |
| Net Assets / Fund Balance | |||
| Net Assets Without Donor Restrictions | $362,907 | $138,539 | ▼ $224,368 |
| Total Net Assets Fund Balance | $362,907 | $138,539 | ▼ $224,368 |
| Total Liabilities and Net Assets / Fund Balance | $386,016 | $161,648 | ▼ $224,368 |
| Name | Title | Full / Part Time | Base | Total |
|---|---|---|---|---|
| Katie Hafner | President & CEO | FT | $73,077 | $73,077 |
| Name | Title |
|---|---|
| Linda Grais MD JD | Vice President |
| Ann Sacher | Managing Director |
| Amy Scharf | Treasurer |
| Line Item | Amount |
|---|---|
| Other Expenses | $384,325 |
| Salaries, Compensation, and Employee Benefits | $128,517 |
| Grants and Similar Amounts Paid | $0 |
| Professional Fundraising Fees | $0 |
| Total Fundraising Expense | $0 |
| Line Item | Program | Management | Fundraising | Total |
|---|---|---|---|---|
| Fees for Services Other | $314,117 | - | - | $314,117 |
| Current Officers, Directors, Trustees, and Key Employees | $73,077 | - | - | $73,077 |
| Other Salaries and Wages | $45,825 | - | - | $45,825 |
| Fees for Services Accounting | - | $24,180 | - | $24,180 |
| Insurance | - | $12,903 | - | $12,903 |
| Advertising | $10,968 | - | - | $10,968 |
| Payroll Taxes | $9,615 | - | - | $9,615 |
| Information Technology | - | $6,200 | - | $6,200 |
| Travel | $3,731 | - | - | $3,731 |
| All Other Expenses | $927 | $686 | - | $1,613 |
| Office Expenses | - | $1,104 | - | $1,104 |
| Other Expenses | - | $685 | - | $685 |
| Fees for Services Legal | - | $270 | - | $270 |
| Total Functional Expenses | $458,260 | $54,582 | $0 | $512,842 |
| Line Item | Amount |
|---|---|
| Professional Fundraising Fees | $0 |
| Line Item | Beginning | End | Change |
|---|---|---|---|
| Loans from Officers, Directors, Trustees, and Key Employees | $23,109 | $23,109 | → $0 |
| Receivables from Disqualified Persons | - | $0 | - |
| Receivables from Officers, Directors, Trustees, and Key Employees | - | $0 | - |
“Form 990 is prepared by an outside tax professional. The form is then reviewed by the organization's management. After a full review, the final version of the tax return is provided to all members of the organization's voting body. A representative of management authorizes the final form 990 which is then e-filed with the internal revenue service.”
“Members of the Board of Directors review all potential conflicts of interest periodically. Top management and all Board members are required to disclose potential conflicts and any related party affiliations. The organization seeks full transparency on all relationships. Any potential conflicts (in fact or appearance) are discussed openly and resolved in accordance with the organization's policies and procedures.”
“Members of the board of directors review the compensation of all high-level personnel periodically in accordance with IRS rules and regulations. Efforts are made to secure compensation data from industry sources in order to determine competitiveness and appropriateness of salaries. Every effort is made to ensure that the process is thorough and transparent in accordance with IRS guidelines and the organization's policies and procedures.”
“Compensation of other personnel and highly compensated employees is reviewed periodically by members of management. Efforts are made to secure compensation data from industry sources in order to determine competitiveness and appropriateness of salaries and all related benefits. All decisions are then documented in personnel files.”
“Tax returns are available for download from several websites and by request from the organization's office in San Francisco, California.”
“All of the organization's governing documents, financial statements and other legal filings are maintained in a secure environment and held available for inspection by tax authorities and the general public. Tax returns are posted annually to www.guidestar.org (where they are available for viewing as a electronic copues) and are also available for a physical inspection at the Organization's office in San Francisco, California.”
This appendix keeps the raw XML leaves available for debugging and edge-case review. The human report above is the primary experience.
| Path | # | Value |
|---|---|---|
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| IRS990/AccountsReceivableGrp/EOYAmt | 0 | 0 |
| IRS990/ActivitiesConductedPrtshpInd | 0 | false |
| IRS990/ActivityOrMissionDesc | 0 | The Lost Women of Science Initiative has two related missions: To tell the story of female scientists who made groundbreaking achievements in their fields and to inspire girls and young women to embark on careers in STEM. |
| IRS990/AdvertisingGrp/ProgramServicesAmt | 0 | 10968 |
| IRS990/AdvertisingGrp/TotalAmt | 0 | 10968 |
| IRS990/AllOtherContributionsAmt | 0 | 288435 |
| IRS990/AllOtherExpensesGrp/ManagementAndGeneralAmt | 0 | 686 |
| IRS990/AllOtherExpensesGrp/ProgramServicesAmt | 0 | 927 |
| IRS990/AllOtherExpensesGrp/TotalAmt | 0 | 1613 |
| IRS990/AnnualDisclosureCoveredPrsnInd | 0 | true |
| IRS990/BackupWthldComplianceInd | 0 | true |
| IRS990/BenefitsToMembersGrp/TotalAmt | 0 | 0 |
| IRS990/BooksInCareOfDetail/PersonNm | 0 | Katie Hafner |
| IRS990/BooksInCareOfDetail/PhoneNum | 0 | 2063593859 |
| IRS990/BooksInCareOfDetail/USAddress/AddressLine1Txt | 0 | 656 Douglass Street |
| IRS990/BooksInCareOfDetail/USAddress/CityNm | 0 | San Francisco |
| IRS990/BooksInCareOfDetail/USAddress/StateAbbreviationCd | 0 | CA |
| IRS990/BooksInCareOfDetail/USAddress/ZIPCd | 0 | 94114 |
| IRS990/BusinessRlnWith35CtrlEntInd | 0 | false |
| IRS990/BusinessRlnWithFamMemInd | 0 | false |
| IRS990/BusinessRlnWithOrgMemInd | 0 | false |
| IRS990/CashNonInterestBearingGrp/BOYAmt | 0 | 62007 |
| IRS990/CashNonInterestBearingGrp/EOYAmt | 0 | 75398 |
| IRS990/ChangeToOrgDocumentsInd | 0 | false |
| IRS990/CntrctRcvdGreaterThan100KCnt | 0 | 0 |
| IRS990/CollectionsOfArtInd | 0 | false |
| IRS990/CompCurrentOfcrDirectorsGrp/ProgramServicesAmt | 0 | 73077 |
| IRS990/CompCurrentOfcrDirectorsGrp/TotalAmt | 0 | 73077 |
| IRS990/CompDisqualPersonsGrp/TotalAmt | 0 | 0 |
| IRS990/CompensationFromOtherSrcsInd | 0 | false |
| IRS990/CompensationProcessCEOInd | 0 | true |
| IRS990/CompensationProcessOtherInd | 0 | true |
| IRS990/ConferencesMeetingsGrp/TotalAmt | 0 | 0 |
| IRS990/ConflictOfInterestPolicyInd | 0 | true |
| IRS990/ConservationEasementsInd | 0 | false |
| IRS990/ConsolidatedAuditFinclStmtInd | 0 | false |
| IRS990/CreditCounselingInd | 0 | false |
| IRS990/CYBenefitsPaidToMembersAmt | 0 | 0 |
| IRS990/CYContributionsGrantsAmt | 0 | 288435 |
| IRS990/CYGrantsAndSimilarPaidAmt | 0 | 0 |
| IRS990/CYInvestmentIncomeAmt | 0 | 39 |
| IRS990/CYOtherExpensesAmt | 0 | 384325 |
| IRS990/CYOtherRevenueAmt | 0 | 0 |
| IRS990/CYProgramServiceRevenueAmt | 0 | 0 |
| IRS990/CYRevenuesLessExpensesAmt | 0 | -224368 |
| IRS990/CYSalariesCompEmpBnftPaidAmt | 0 | 128517 |
| IRS990/CYTotalExpensesAmt | 0 | 512842 |
| IRS990/CYTotalFundraisingExpenseAmt | 0 | 0 |
| IRS990/CYTotalProfFndrsngExpnsAmt | 0 | 0 |
| IRS990/CYTotalRevenueAmt | 0 | 288474 |
| IRS990/DecisionsSubjectToApprovaInd | 0 | false |
| IRS990/DeductibleArtContributionInd | 0 | false |
| IRS990/DeductibleNonCashContriInd | 0 | false |
| IRS990/DelegationOfMgmtDutiesInd | 0 | false |
| IRS990/DepreciationDepletionGrp/TotalAmt | 0 | 0 |
| IRS990/Desc | 0 | The Initiatives flagship is its Lost Women of Science podcast, producing four multi-episode seasons per year. As a full, mission-driven organization, the Lost Women of Science Initiative plans to digitize and archive our research efforts and make all primary source material available to students and historians of science. |
| IRS990/DescribedInSection501c3Ind | 0 | true |
| IRS990/DisregardedEntityInd | 0 | false |
| IRS990/DocumentRetentionPolicyInd | 0 | true |
| IRS990/DonorAdvisedFundInd | 0 | false |
| IRS990/DonorRstrOrQuasiEndowmentsInd | 0 | false |
| IRS990/ElectionOfBoardMembersInd | 0 | false |
| IRS990/EmployeeCnt | 0 | 2 |
| IRS990/EmploymentTaxReturnsFiledInd | 0 | true |
| IRS990/EngagedInExcessBenefitTransInd | 0 | false |
| IRS990/ExpenseAmt | 0 | 458260 |
| IRS990/FamilyOrBusinessRlnInd | 0 | false |
| IRS990/FederalGrantAuditRequiredInd | 0 | false |
| IRS990/FeesForServicesAccountingGrp/ManagementAndGeneralAmt | 0 | 24180 |
| IRS990/FeesForServicesAccountingGrp/TotalAmt | 0 | 24180 |
| IRS990/FeesForServicesLegalGrp/ManagementAndGeneralAmt | 0 | 270 |
| IRS990/FeesForServicesLegalGrp/TotalAmt | 0 | 270 |
| IRS990/FeesForServicesLobbyingGrp/TotalAmt | 0 | 0 |
| IRS990/FeesForServicesManagementGrp/TotalAmt | 0 | 0 |
| IRS990/FeesForServicesOtherGrp/ProgramServicesAmt | 0 | 314117 |
| IRS990/FeesForServicesOtherGrp/TotalAmt | 0 | 314117 |
| IRS990/FeesForServicesProfFundraising/TotalAmt | 0 | 0 |
| IRS990/FeesForSrvcInvstMgmntFeesGrp/TotalAmt | 0 | 0 |
| IRS990/ForeignActivitiesInd | 0 | false |
| IRS990/ForeignFinancialAccountInd | 0 | false |
| IRS990/ForeignGrantsGrp/TotalAmt | 0 | 0 |
| IRS990/ForeignOfficeInd | 0 | false |
| IRS990/Form1098CFiledInd | 0 | false |
| IRS990/Form8282FiledCnt | 0 | 0 |
| IRS990/Form8282PropertyDisposedOfInd | 0 | false |
| IRS990/Form8899Filedind | 0 | false |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 0 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 1 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 2 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRltdOrgRt | 3 | 0.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 0 | 40.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 1 | 5.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 2 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/AverageHoursPerWeekRt | 3 | 2.00 |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/IndividualTrusteeOrDirectorInd | 3 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 0 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 1 | X |
| IRS990/Form990PartVIISectionAGrp/OfficerInd | 2 | X |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/OtherCompensationAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 0 | Katie Hafner |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 1 | Amy Scharf |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 2 | Linda Grais MD JD |
| IRS990/Form990PartVIISectionAGrp/PersonNm | 3 | Ann Sacher |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 0 | 73077 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromOrgAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 0 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 1 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 2 | 0 |
| IRS990/Form990PartVIISectionAGrp/ReportableCompFromRltdOrgAmt | 3 | 0 |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 0 | President & CEO |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 1 | Treasurer |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 2 | Vice President |
| IRS990/Form990PartVIISectionAGrp/TitleTxt | 3 | Managing Dir |
| IRS990/Form990ProvidedToGvrnBodyInd | 0 | true |
| IRS990/FormationYr | 0 | 2021 |
| IRS990/FormerOfcrEmployeesListedInd | 0 | false |
| IRS990/FSAuditedInd | 0 | false |
| IRS990/FundraisingActivitiesInd | 0 | false |
| IRS990/GamingActivitiesInd | 0 | false |
| IRS990/GoverningBodyVotingMembersCnt | 0 | 4 |
| IRS990/GrantsToDomesticIndividualsGrp/TotalAmt | 0 | 0 |
| IRS990/GrantsToDomesticOrgsGrp/TotalAmt | 0 | 0 |
| IRS990/GrantsToIndividualsInd | 0 | false |
| IRS990/GrantsToOrganizationsInd | 0 | false |
| IRS990/GrantToRelatedPersonInd | 0 | false |
| IRS990/GrossReceiptsAmt | 0 | 288474 |
| IRS990/GroupReturnForAffiliatesInd | 0 | false |
| IRS990/IncludeFIN48FootnoteInd | 0 | false |
| IRS990/IncmFromInvestBondProceedsGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/IndependentAuditFinclStmtInd | 0 | false |
| IRS990/IndependentVotingMemberCnt | 0 | 3 |
| IRS990/IndivRcvdGreaterThan100KCnt | 0 | 0 |
| IRS990/IndoorTanningServicesInd | 0 | false |
| IRS990/InfoInScheduleOPartIXInd | 0 | X |
| IRS990/InfoInScheduleOPartVIInd | 0 | X |
| IRS990/InformationTechnologyGrp/ManagementAndGeneralAmt | 0 | 6200 |
| IRS990/InformationTechnologyGrp/TotalAmt | 0 | 6200 |
| IRS990/InsuranceGrp/ManagementAndGeneralAmt | 0 | 12903 |
| IRS990/InsuranceGrp/TotalAmt | 0 | 12903 |
| IRS990/IntangibleAssetsGrp/EOYAmt | 0 | 0 |
| IRS990/InterestGrp/TotalAmt | 0 | 0 |
| IRS990/InventoriesForSaleOrUseGrp/EOYAmt | 0 | 0 |
| IRS990/InvestmentIncomeGrp/ExclusionAmt | 0 | 39 |
| IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt | 0 | 39 |
| IRS990/InvestmentInJointVentureInd | 0 | false |
| IRS990/InvestmentsOtherSecuritiesGrp/EOYAmt | 0 | 0 |
| IRS990/InvestmentsProgramRelatedGrp/EOYAmt | 0 | 0 |
| IRS990/InvestmentsPubTradedSecGrp/EOYAmt | 0 | 0 |
| IRS990/IRPDocumentCnt | 0 | 38 |
| IRS990/IRPDocumentW2GCnt | 0 | 0 |
| IRS990/LandBldgEquipBasisNetGrp/EOYAmt | 0 | 0 |
| IRS990/LegalDomicileStateCd | 0 | CA |
| IRS990/LoanOutstandingInd | 0 | true |
| IRS990/LoansFromOfficersDirectorsGrp/BOYAmt | 0 | 23109 |
| IRS990/LoansFromOfficersDirectorsGrp/EOYAmt | 0 | 23109 |
| IRS990/LobbyingActivitiesInd | 0 | false |
| IRS990/LocalChaptersInd | 0 | false |
| IRS990/MaterialDiversionOrMisuseInd | 0 | false |
| IRS990/MembersOrStockholdersInd | 0 | false |
| IRS990/MethodOfAccountingCashInd | 0 | X |
| IRS990/MinutesOfCommitteesInd | 0 | true |
| IRS990/MinutesOfGoverningBodyInd | 0 | true |
| IRS990/MissionDesc | 0 | The Lost Women of Science Initiative has two related missions: To tell the story of female scientists who made groundbreaking achievements in their fields and to inspire girls and young women to embark on careers in STEM. |
| IRS990/MoreThan5000KToIndividualsInd | 0 | false |
| IRS990/MoreThan5000KToOrgInd | 0 | false |
| IRS990/NetAssetsOrFundBalancesBOYAmt | 0 | 362907 |
| IRS990/NetAssetsOrFundBalancesEOYAmt | 0 | 138539 |
| IRS990/NetGainOrLossInvestmentsGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NetIncmFromFundraisingEvtGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NetIncomeFromGamingGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NetIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NetRentalIncomeOrLossGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/NoDonorRestrictionNetAssetsGrp/BOYAmt | 0 | 362907 |
| IRS990/NoDonorRestrictionNetAssetsGrp/EOYAmt | 0 | 138539 |
| IRS990/NondeductibleContributionsInd | 0 | false |
| IRS990/OccupancyGrp/TotalAmt | 0 | 0 |
| IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt | 0 | 1104 |
| IRS990/OfficeExpensesGrp/TotalAmt | 0 | 1104 |
| IRS990/OfficerMailingAddressInd | 0 | false |
| IRS990/OperateHospitalInd | 0 | false |
| IRS990/Organization501c3Ind | 0 | X |
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| IRS990/OtherAssetsTotalGrp/EOYAmt | 0 | 0 |
| IRS990/OtherEmployeeBenefitsGrp/TotalAmt | 0 | 0 |
| IRS990/OtherExpensesGrp/Desc | 0 | Software & Apps |
| IRS990/OtherExpensesGrp/Desc | 1 | Member/Dues/Subscriptions |
| IRS990/OtherExpensesGrp/Desc | 2 | Other Expense |
| IRS990/OtherExpensesGrp/Desc | 3 | Gift Expense |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 0 | 5073 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 1 | 2614 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 2 | 867 |
| IRS990/OtherExpensesGrp/ManagementAndGeneralAmt | 3 | 685 |
| IRS990/OtherExpensesGrp/TotalAmt | 0 | 5073 |
| IRS990/OtherExpensesGrp/TotalAmt | 1 | 2614 |
| IRS990/OtherExpensesGrp/TotalAmt | 2 | 867 |
| IRS990/OtherExpensesGrp/TotalAmt | 3 | 685 |
| IRS990/OtherInd | 0 | X |
| IRS990/OtherRevenueTotalAmt | 0 | 0 |
| IRS990/OtherSalariesAndWagesGrp/ProgramServicesAmt | 0 | 45825 |
| IRS990/OtherSalariesAndWagesGrp/TotalAmt | 0 | 45825 |
| IRS990/OthNotesLoansReceivableNetGrp/EOYAmt | 0 | 0 |
| IRS990/PartialLiquidationInd | 0 | false |
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| IRS990/PayrollTaxesGrp/ProgramServicesAmt | 0 | 9615 |
| IRS990/PayrollTaxesGrp/TotalAmt | 0 | 9615 |
| IRS990/PensionPlanContributionsGrp/TotalAmt | 0 | 0 |
| IRS990/PledgesAndGrantsReceivableGrp/EOYAmt | 0 | 0 |
| IRS990/PoliticalCampaignActyInd | 0 | false |
| IRS990/PrepaidExpensesDefrdChargesGrp/EOYAmt | 0 | 0 |
| IRS990/PrincipalOfficerNm | 0 | Katie Hafner |
| IRS990/ProfessionalFundraisingInd | 0 | false |
| IRS990/ProhibitedTaxShelterTransInd | 0 | false |
| IRS990/PYContributionsGrantsAmt | 0 | 323130 |
| IRS990/PYExcessBenefitTransInd | 0 | false |
| IRS990/PYInvestmentIncomeAmt | 0 | 2369 |
| IRS990/PymtTravelEntrtnmntPubOfclGrp/TotalAmt | 0 | 0 |
| IRS990/PYOtherExpensesAmt | 0 | 381041 |
| IRS990/PYOtherRevenueAmt | 0 | 5000 |
| IRS990/PYRevenuesLessExpensesAmt | 0 | -129463 |
| IRS990/PYSalariesCompEmpBnftPaidAmt | 0 | 78921 |
| IRS990/PYTotalExpensesAmt | 0 | 459962 |
| IRS990/PYTotalRevenueAmt | 0 | 330499 |
| IRS990/QuidProQuoContributionsInd | 0 | false |
| IRS990/RcvblFromDisqualifiedPrsnGrp/EOYAmt | 0 | 0 |
| IRS990/RcvFndsToPayPrsnlBnftCntrctInd | 0 | false |
| IRS990/ReceivablesFromOfficersEtcGrp/EOYAmt | 0 | 0 |
| IRS990/ReconcilationRevenueExpnssAmt | 0 | -224368 |
| IRS990/RegularMonitoringEnfrcInd | 0 | true |
| IRS990/RelatedEntityInd | 0 | false |
| IRS990/RelatedOrganizationCtrlEntInd | 0 | false |
| IRS990/ReportInvestmentsOtherSecInd | 0 | false |
| IRS990/ReportLandBuildingEquipmentInd | 0 | false |
| IRS990/ReportOtherAssetsInd | 0 | false |
| IRS990/ReportOtherLiabilitiesInd | 0 | false |
| IRS990/ReportProgramRelatedInvstInd | 0 | false |
| IRS990/RoyaltiesGrp/TotalAmt | 0 | 0 |
| IRS990/RoyaltiesRevenueGrp/TotalRevenueColumnAmt | 0 | 0 |
| IRS990/SavingsAndTempCashInvstGrp/BOYAmt | 0 | 324009 |
| IRS990/SavingsAndTempCashInvstGrp/EOYAmt | 0 | 86250 |
| IRS990ScheduleA/First5Years170Ind | 0 | X |
| IRS990ScheduleA/Form990ScheduleAPartVIGrp/ExplanationTxt | 0 | Lost Women of Science Initiative, Inc. received a one-time, non-renewable grant in the amount of $446,760 for podcast production support from the Gordon & Betty Moore Foundation. This grant is an unusual grant and not included on Part II, line 1. |
| IRS990ScheduleA/Form990ScheduleAPartVIGrp/FormAndLineReferenceDesc | 0 | Support Schedule: Additional Supplemental Information |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearAmt | 0 | 288435 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus1YearAmt | 0 | 323130 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 650023 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 282063 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 638770 |
| IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/TotalAmt | 0 | 2182421 |
| IRS990ScheduleA/GovtFurnSrvcFcltsVl170Grp/TotalAmt | 0 | 0 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearAmt | 0 | 39 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus1YearAmt | 0 | 2369 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus2YearsAmt | 0 | 2183 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearMinus3YearsAmt | 0 | 707 |
| IRS990ScheduleA/GrossInvestmentIncome170Grp/TotalAmt | 0 | 5298 |
| IRS990ScheduleA/OtherIncome170Grp/CurrentTaxYearMinus1YearAmt | 0 | 5000 |
| IRS990ScheduleA/OtherIncome170Grp/TotalAmt | 0 | 5000 |
| IRS990ScheduleA/PublicOrganization170Ind | 0 | X |
| IRS990ScheduleA/PublicSupportCY170Pct | 0 | 0.00000 |
| IRS990ScheduleA/PublicSupportTotal170Amt | 0 | 1029981 |
| IRS990ScheduleA/SubstantialContributorsTotAmt | 0 | 1152440 |
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| IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus4YearsAmt | 0 | 638770 |
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| IRS990ScheduleB/ContributorInformationGrp/ContributorBusinessName/BusinessNameLine1 | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorNum | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/AddressLine1 | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/AddressLine2 | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/City | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/State | 0 | RESTRICTED |
| IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/ZIPCode | 0 | RESTRICTED |
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| IRS990/ScheduleBRequiredInd | 0 | true |
| IRS990/ScheduleJRequiredInd | 0 | false |
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| IRS990ScheduleL/LoansBtwnOrgInterestedPrsnGrp/BoardOrCommitteeApprovalInd | 0 | true |
| IRS990ScheduleL/LoansBtwnOrgInterestedPrsnGrp/DefaultInd | 0 | false |
| IRS990ScheduleL/LoansBtwnOrgInterestedPrsnGrp/LoanPurposeTxt | 0 | Operations |
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| IRS990ScheduleL/LoansBtwnOrgInterestedPrsnGrp/PersonNm | 0 | Katie Hafner |
| IRS990ScheduleL/LoansBtwnOrgInterestedPrsnGrp/RelationshipWithOrgTxt | 0 | President |
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| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 0 | Form 990 is prepared by an outside tax professional. The form is then reviewed by the organization's management. After a full review, the final version of the tax return is provided to all members of the organization's voting body. A representative of management authorizes the final form 990 which is then e-filed with the internal revenue service. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 1 | Members of the Board of Directors review all potential conflicts of interest periodically. Top management and all Board members are required to disclose potential conflicts and any related party affiliations. The organization seeks full transparency on all relationships. Any potential conflicts (in fact or appearance) are discussed openly and resolved in accordance with the organization's policies and procedures. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 2 | Members of the board of directors review the compensation of all high-level personnel periodically in accordance with IRS rules and regulations. Efforts are made to secure compensation data from industry sources in order to determine competitiveness and appropriateness of salaries. Every effort is made to ensure that the process is thorough and transparent in accordance with IRS guidelines and the organization's policies and procedures. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 3 | Compensation of other personnel and highly compensated employees is reviewed periodically by members of management. Efforts are made to secure compensation data from industry sources in order to determine competitiveness and appropriateness of salaries and all related benefits. All decisions are then documented in personnel files. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 4 | Tax returns are available for download from several websites and by request from the organization's office in San Francisco, California. |
| IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt | 5 | All of the organization's governing documents, financial statements and other legal filings are maintained in a secure environment and held available for inspection by tax authorities and the general public. Tax returns are posted annually to www.guidestar.org (where they are available for viewing as a electronic copues) and are also available for a physical inspection at the Organization's office in San Francisco, California. |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 0 | Form 990, Part VI, Section B, Line 11b |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 1 | Form 990, Part VI, Section B, Line 12c |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 2 | Form 990, Part VI, Section B, Line 15a |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 3 | Form 990, Part VI, Section B, Line 15b |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 4 | Form 990, Part VI, Section C, Line 18 |
| IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc | 5 | Form 990, Part VI, Section C, Line 19 |
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| IRS990/StatesWhereCopyOfReturnIsFldCd | 0 | CA |
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| IRS990/TotalEmployeeCnt | 0 | 2 |
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| IRS990/TotalFunctionalExpensesGrp/ManagementAndGeneralAmt | 0 | 54582 |
| IRS990/TotalFunctionalExpensesGrp/ProgramServicesAmt | 0 | 458260 |
| IRS990/TotalFunctionalExpensesGrp/TotalAmt | 0 | 512842 |
| IRS990/TotalGrossUBIAmt | 0 | 0 |
| IRS990/TotalLiabilitiesBOYAmt | 0 | 23109 |
| IRS990/TotalLiabilitiesEOYAmt | 0 | 23109 |
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| IRS990/TotalProgramServiceRevenueAmt | 0 | 0 |
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| IRS990/TotalRevenueGrp/ExclusionAmt | 0 | 39 |
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| IRS990/TotLiabNetAssetsFundBalanceGrp/BOYAmt | 0 | 386016 |
| IRS990/TotLiabNetAssetsFundBalanceGrp/EOYAmt | 0 | 161648 |
| IRS990/TravelGrp/ProgramServicesAmt | 0 | 3731 |
| IRS990/TravelGrp/TotalAmt | 0 | 3731 |
| IRS990/TrnsfrExmptNonChrtblRltdOrgInd | 0 | false |
| IRS990/TypeOfOrganizationCorpInd | 0 | X |
| IRS990/UnrelatedBusIncmOverLimitInd | 0 | false |
| IRS990/UponRequestInd | 0 | X |
| IRS990/USAddress/AddressLine1Txt | 0 | 656 Douglass Street |
| IRS990/USAddress/CityNm | 0 | San Francisco |
| IRS990/USAddress/StateAbbreviationCd | 0 | CA |
| IRS990/USAddress/ZIPCd | 0 | 94114 |
| IRS990/VotingMembersGoverningBodyCnt | 0 | 4 |
| IRS990/VotingMembersIndependentCnt | 0 | 3 |
| IRS990/WebsiteAddressTxt | 0 | www.lostwomenofscience.org |
| IRS990/WhistleblowerPolicyInd | 0 | true |
| ReturnHeader/BuildTS | 0 | 2025-03-06 01:10:19Z |
| ReturnHeader/BusinessOfficerGrp/DiscussWithPaidPreparerInd | 0 | true |
| ReturnHeader/BusinessOfficerGrp/PersonNm | 0 | Amy Scharf |
| ReturnHeader/BusinessOfficerGrp/PersonTitleTxt | 0 | Treasurer |
| ReturnHeader/BusinessOfficerGrp/PhoneNum | 0 | 2063593859 |
| ReturnHeader/BusinessOfficerGrp/SignatureDt | 0 | 2026-04-23 |
| ReturnHeader/Filer/BusinessName/BusinessNameLine1Txt | 0 | Lost Women of Science Initiative Inc |
| ReturnHeader/Filer/BusinessNameControlTxt | 0 | LOST |
| ReturnHeader/Filer/EIN | 0 | 862147594 |
| ReturnHeader/Filer/PhoneNum | 0 | 2063593859 |
| ReturnHeader/Filer/USAddress/AddressLine1Txt | 0 | 656 Douglass Street |
| ReturnHeader/Filer/USAddress/CityNm | 0 | San Francisco |
| ReturnHeader/Filer/USAddress/StateAbbreviationCd | 0 | CA |
| ReturnHeader/Filer/USAddress/ZIPCd | 0 | 94114 |
| ReturnHeader/PreparerFirmGrp/PreparerFirmEIN | 0 | 680260103 |
| ReturnHeader/PreparerFirmGrp/PreparerFirmName/BusinessNameLine1Txt | 0 | REGALIA BERGER & BERGER CPAS |
| ReturnHeader/PreparerFirmGrp/PreparerUSAddress/AddressLine1Txt | 0 | 103 TOWN COUNTRY DR STE K |
| ReturnHeader/PreparerFirmGrp/PreparerUSAddress/CityNm | 0 | DANVILLE |
| ReturnHeader/PreparerFirmGrp/PreparerUSAddress/StateAbbreviationCd | 0 | CA |
| ReturnHeader/PreparerFirmGrp/PreparerUSAddress/ZIPCd | 0 | 94526 |
| ReturnHeader/PreparerPersonGrp/PhoneNum | 0 | 9253140390 |
| ReturnHeader/PreparerPersonGrp/PreparerPersonNm | 0 | Douglas W Regalia |
| ReturnHeader/ReturnTs | 0 | 2026-04-23T11:46:21-07:00 |
| ReturnHeader/ReturnTypeCd | 0 | 990 |
| ReturnHeader/TaxPeriodBeginDt | 0 | 2025-01-01 |
| ReturnHeader/TaxPeriodEndDt | 0 | 2025-12-31 |
| ReturnHeader/TaxYr | 0 | 2025 |
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