Civic Intelligence

Rc28 Foundation

990EZ • Fiscal year 2025 • EIN 37-2136270

Jan 01, 2025 to Dec 31, 2025

Organization ProfileRC28FOUNDATION.ORG
1942 Broadway Street Suite 314CBoulder, CO 80302

(415) 928-4161

Siviq Scores

Precomputed percentiles for this filing year versus similar nonprofits in the same peer cohort.

Liabilities / Assets

Score unavailable

No value available

Liabilities-to-assets requires both liabilities and assets on this filing.

Source year 2025

Liabilities / Revenue

Score unavailable

No value available

Liabilities-to-revenue requires both liabilities and revenue on this filing.

Source year 2025

Net Margin

95th percentile

61%

Higher net margin than 95% of similar nonprofits.

2025 filings • 501(c)3 • <$500k nonprofits • Source year 2025

Top Officer Pay

82nd percentile

$0

Higher top officer pay than 82% of similar nonprofits.

Top officer pay equals 0.0% of source-year revenue.

2025 filings • 501(c)3 • <$500k nonprofits • Source year 2025

Asset Growth

74th percentile

21%

Faster asset growth than 74% of similar nonprofits.

2025 filings • 501(c)3 • <$500k nonprofits • Annualized from 2024 to 2025

Revenue Growth

5th percentile

-74%

Faster revenue growth than 5% of similar nonprofits.

2025 filings • 501(c)3 • <$500k nonprofits • Annualized from 2024 to 2025

Balance Sheet
Liabilities / AssetsScore unavailable

Assets

Up

$185,013

Up $32,612 (+21%) from 2024

Net Assets

Up

$185,013

Up $32,612 (+21%) from 2024

Liabilities

-

No earlier filing loaded for comparison.

Revenue And Expenses
Liabilities / RevenueScore unavailableNet Margin95th percentile

Revenue

Down

$41,582

Down $120,150 (-74%) from 2024

Expenses

Up

$16,022

Up $8,525 (+114%) from 2024

Net Income

Down

$25,560

Down $128,675 (-83%) from 2024

Historical Trend

Balance Sheet Trend

Asset Growth74th percentile

The highlighted filing sits inside the broader history for assets, liabilities, and net assets.

$200K$150K$100K$50K$0Assets 2024: $152,401Net Assets 2024: $152,4012024Assets 2025: $185,013Net Assets 2025: $185,0132025

Highlighted filing

2025

Assets$185,013
Liabilities-
Net Assets$185,013
Open 2025 Filing

Operations Trend

Revenue Growth5th percentile

Revenue, expenses, and net income across loaded years, with this filing highlighted.

$200K$150K$100K$50K$0Revenue 2024: $161,732Expenses 2024: $7,497Net Income 2024: $154,2352024Revenue 2025: $41,582Expenses 2025: $16,022Net Income 2025: $25,5602025

Highlighted filing

2025

Revenue$41,582
Expenses$16,022
Net Income$25,560
Open 2025 Filing
Jump To
Filing Snapshot
Filing Period
Jan 1, 2025 to Dec 31, 2025
Signed
Mar 24, 2026
Return Version
2025v4.0
Gross Receipts
$41,582
Mission and Program Overview

Mission

To promote quality scientific research on social stratification & mobility

Program Services

DescriptionGrantsExpenses
PRESENTED 11 TRAVEL GRANTS (5 AT THE SPRING MEETING AND 6 AT THE SUMMER MEETING) & 1 ANNUAL SIGNIFICANT SCHOLARSHIP AWARD AT THE SUMMER MEETING.$12,411$12,411
HOSTED TWO CONFERENCES IN 2025 IN COLLABORATION WITH RC28 LOCAL HOSTS; THESE EVENTS ARE PIVOTAL FOR SHARING NEW RESEARCH AND ENHANCING INTERNATIONAL COOPERATION.-$2,162
Compensation and Service Providers
Top Officer Pay82nd percentile

Employees

NameTitleFull / Part TimeBaseOtherTotal
HIROSHI ISHIDAPresidentPT$0--
JENNIE BRANDVice PresidePT$0--
YULIYA KOSYAKOVASec/TreasurePT$0--
RICHARD ARUMBoard MemberPT$0--
Filing and Contact Details

Filer

Filer Name
Rc28 Foundation
EIN
37-2136270
Phone
4159284161
Address
1942 BROADWAY STREET SUITE 314C, BOULDER, CO 80302

Signing Officer

Name
Hiroshi Ishida
Title
President
Phone
4159284161
Signed
2026-03-24
Discuss with paid preparer
Yes

Preparer

Firm
Marjtax Incorporated
Address
3542 FRUITVALE- AVE PMB 227, OAKLAND, CA 94602
Preparer
Marjorie Williams-jones
Phone
5104826204
Supplemental Narrative

Additional Explanations

Form 990-ez, Part I, Line 10

“Cash contribution: 11,411 relationship: confrnc participants”

Form 990-ez, Part I, Line 16

“Expenses foreign tax paid 46 paypal fees 266 office equipment 174 plaques for awards 68 meetings/meals 258 total 812”

Form 990-ez, Part I, Line 20

“Unrealized gains on investments 7,052”

Raw XML Appendix137 raw XML fields

This appendix keeps the raw XML leaves available for debugging and edge-case review. The human report above is the primary experience.

Path#Value
IRS990EZ/ActivitiesNotPreviouslyRptInd0false
IRS990EZ/BooksInCareOfDetail/PersonNm0HIROSHI ISHIDA
IRS990EZ/BooksInCareOfDetail/PhoneNum04159284161
IRS990EZ/BooksInCareOfDetail/USAddress/AddressLine1Txt01942 BROADWAY STREET
IRS990EZ/BooksInCareOfDetail/USAddress/AddressLine2Txt0SUITE 314C
IRS990EZ/BooksInCareOfDetail/USAddress/CityNm0BOULDER
IRS990EZ/BooksInCareOfDetail/USAddress/StateAbbreviationCd0CO
IRS990EZ/BooksInCareOfDetail/USAddress/ZIPCd080302
IRS990EZ/CashSavingsAndInvestmentsGrp/BOYAmt0152401
IRS990EZ/CashSavingsAndInvestmentsGrp/EOYAmt0185013
IRS990EZ/ChgMadeToOrgnzngDocNotRptInd0false
IRS990EZ/DonorAdvisedFndsInd0false
IRS990EZ/EngagedInExcessBenefitTransInd0false
IRS990EZ/ExcessOrDeficitForYearAmt025560
IRS990EZ/FeesAndOtherPymtToIndCntrctAmt02799
IRS990EZ/FiledScheduleAInd0true
IRS990EZ/ForeignFinancialAccountInd0false
IRS990EZ/ForeignOfficeInd0false
IRS990EZ/Form1120PolFiledInd0false
IRS990EZ/Form990TotalAssetsGrp/BOYAmt0152401
IRS990EZ/Form990TotalAssetsGrp/EOYAmt0185013
IRS990EZ/GainOrLossFromSaleOfAssetsAmt05135
IRS990EZ/GrantsAndSimilarAmountsPaidAmt012411
IRS990EZ/GrossReceiptsAmt041582
IRS990EZ/InfoInScheduleOPartIInd0X
IRS990EZ/InvestmentIncomeAmt04094
IRS990EZ/LobbyingActivitiesInd0false
IRS990EZ/MadeLoansToFromOfficersInd0false
IRS990EZ/MethodOfAccountingAccrualInd0X
IRS990EZ/NetAssetsOrFundBalancesBOYAmt0152401
IRS990EZ/NetAssetsOrFundBalancesEOYAmt0185013
IRS990EZ/NetAssetsOrFundBalancesGrp/BOYAmt0152401
IRS990EZ/NetAssetsOrFundBalancesGrp/EOYAmt0185013
IRS990EZ/OfficerDirectorTrusteeEmplGrp/AverageHrsPerWkDevotedToPosRt05.00
IRS990EZ/OfficerDirectorTrusteeEmplGrp/AverageHrsPerWkDevotedToPosRt15.00
IRS990EZ/OfficerDirectorTrusteeEmplGrp/AverageHrsPerWkDevotedToPosRt25.00
IRS990EZ/OfficerDirectorTrusteeEmplGrp/AverageHrsPerWkDevotedToPosRt35.00
IRS990EZ/OfficerDirectorTrusteeEmplGrp/CompensationAmt00
IRS990EZ/OfficerDirectorTrusteeEmplGrp/CompensationAmt10
IRS990EZ/OfficerDirectorTrusteeEmplGrp/CompensationAmt20
IRS990EZ/OfficerDirectorTrusteeEmplGrp/CompensationAmt30
IRS990EZ/OfficerDirectorTrusteeEmplGrp/PersonNm0HIROSHI ISHIDA
IRS990EZ/OfficerDirectorTrusteeEmplGrp/PersonNm1JENNIE BRAND
IRS990EZ/OfficerDirectorTrusteeEmplGrp/PersonNm2YULIYA KOSYAKOVA
IRS990EZ/OfficerDirectorTrusteeEmplGrp/PersonNm3RICHARD ARUM
IRS990EZ/OfficerDirectorTrusteeEmplGrp/TitleTxt0PRESIDENT
IRS990EZ/OfficerDirectorTrusteeEmplGrp/TitleTxt1VICE PRESIDE
IRS990EZ/OfficerDirectorTrusteeEmplGrp/TitleTxt2SEC/TREASURE
IRS990EZ/OfficerDirectorTrusteeEmplGrp/TitleTxt3BOARD MEMBER
IRS990EZ/OperateHospitalInd0false
IRS990EZ/Organization501c3Ind0X
IRS990EZ/OrganizationDissolvedEtcInd0false
IRS990EZ/OrganizationHadUBIInd0false
IRS990EZ/OtherChangesInNetAssetsAmt07052
IRS990EZ/OtherExpensesTotalAmt0812
IRS990EZ/PartVIHghstPdCntrctProfSrvcTxt0NONE
IRS990EZ/PartVIOfCompOfHghstPdEmplTxt0NONE
IRS990EZ/PoliticalCampaignActyInd0false
IRS990EZ/PrimaryExemptPurposeTxt0TO PROMOTE QUALITY SCIENTIFIC RESEARCH ON SOCIAL STRATIFICATION & MOBILITY
IRS990EZ/ProgramServiceRevenueAmt032353
IRS990EZ/ProgramSrvcAccomplishmentGrp/DescriptionProgramSrvcAccomTxt0HOSTED TWO CONFERENCES IN 2025 IN COLLABORATION WITH RC28 LOCAL HOSTS; THESE EVENTS ARE PIVOTAL FOR SHARING NEW RESEARCH AND ENHANCING INTERNATIONAL COOPERATION.
IRS990EZ/ProgramSrvcAccomplishmentGrp/DescriptionProgramSrvcAccomTxt1PRESENTED 11 TRAVEL GRANTS (5 AT THE SPRING MEETING AND 6 AT THE SUMMER MEETING) & 1 ANNUAL SIGNIFICANT SCHOLARSHIP AWARD AT THE SUMMER MEETING.
IRS990EZ/ProgramSrvcAccomplishmentGrp/GrantsAndAllocationsAmt012411
IRS990EZ/ProgramSrvcAccomplishmentGrp/ProgramServiceExpensesAmt02162
IRS990EZ/ProgramSrvcAccomplishmentGrp/ProgramServiceExpensesAmt112411
IRS990EZ/ProhibitedTaxShelterTransInd0false
IRS990EZ/RelatedOrganizationCtrlEntInd0false
IRS990EZ/SaleOfAssetsGrossAmt05135
IRS990EZ/ScheduleBNotRequiredInd0X
IRS990EZ/SchoolOperatingInd0false
IRS990EZ/SubjectToProxyTaxInd0false
IRS990EZ/TanningServicesProvidedInd0false
IRS990EZ/TotalExpensesAmt016022
IRS990EZ/TotalProgramServiceExpensesAmt014573
IRS990EZ/TotalRevenueAmt041582
IRS990EZ/TransactionWithControlEntInd0false
IRS990EZ/TrnsfrExmptNonChrtblRltdOrgInd0false
IRS990EZ/TypeOfOrganizationCorpInd0X
IRS990EZ/WebsiteAddressTxt0RC28FOUNDATION.ORG
IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/CurrentTaxYearMinus1YearAmt0156123
IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/TotalAmt0156123
IRS990ScheduleA/GrossInvestmentIncome509Grp/CurrentTaxYearAmt04094
IRS990ScheduleA/GrossInvestmentIncome509Grp/CurrentTaxYearMinus1YearAmt01687
IRS990ScheduleA/GrossInvestmentIncome509Grp/TotalAmt05781
IRS990ScheduleA/GrossReceiptsAdmissionsGrp/CurrentTaxYearAmt032353
IRS990ScheduleA/GrossReceiptsAdmissionsGrp/CurrentTaxYearMinus1YearAmt02723
IRS990ScheduleA/GrossReceiptsAdmissionsGrp/TotalAmt035076
IRS990ScheduleA/InvestmentIncomeAndUBTIGrp/CurrentTaxYearAmt04094
IRS990ScheduleA/InvestmentIncomeAndUBTIGrp/CurrentTaxYearMinus1YearAmt01687
IRS990ScheduleA/InvestmentIncomeAndUBTIGrp/TotalAmt05781
IRS990ScheduleA/InvestmentIncomeCYPct00.03000
IRS990ScheduleA/InvestmentIncomePYPct00.00000
IRS990ScheduleA/PubliclySupportedOrg509a2Ind0X
IRS990ScheduleA/PublicSupportCY509Pct00.97070
IRS990ScheduleA/PublicSupportTotal509Amt0191199
IRS990ScheduleA/ThirtyThrPctSuprtTestsCY509Ind0X
IRS990ScheduleA/Total509Grp/CurrentTaxYearAmt032353
IRS990ScheduleA/Total509Grp/CurrentTaxYearMinus1YearAmt0158846
IRS990ScheduleA/Total509Grp/TotalAmt0191199
IRS990ScheduleA/TotalSupportCalendarYearGrp/CurrentTaxYearAmt036447
IRS990ScheduleA/TotalSupportCalendarYearGrp/CurrentTaxYearMinus1YearAmt0160533
IRS990ScheduleA/TotalSupportCalendarYearGrp/TotalAmt0196980
IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt0CASH CONTRIBUTION: 11,411 RELATIONSHIP: CONFRNC PARTICIPANTS
IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt1EXPENSES FOREIGN TAX PAID 46 PAYPAL FEES 266 OFFICE EQUIPMENT 174 PLAQUES FOR AWARDS 68 MEETINGS/MEALS 258 TOTAL 812
IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt2UNREALIZED GAINS ON INVESTMENTS 7,052
IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc0FORM 990-EZ, PART I, LINE 10
IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc1FORM 990-EZ, PART I, LINE 16
IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc2FORM 990-EZ, PART I, LINE 20
ReturnHeader/BuildTS02025-03-06 01:10:19Z
ReturnHeader/BusinessOfficerGrp/DiscussWithPaidPreparerInd0true
ReturnHeader/BusinessOfficerGrp/PersonNm0HIROSHI ISHIDA
ReturnHeader/BusinessOfficerGrp/PersonTitleTxt0PRESIDENT
ReturnHeader/BusinessOfficerGrp/PhoneNum04159284161
ReturnHeader/BusinessOfficerGrp/SignatureDt02026-03-24
ReturnHeader/Filer/BusinessName/BusinessNameLine1Txt0RC28 FOUNDATION
ReturnHeader/Filer/BusinessNameControlTxt0RC28
ReturnHeader/Filer/EIN0372136270
ReturnHeader/Filer/PhoneNum04159284161
ReturnHeader/Filer/USAddress/AddressLine1Txt01942 BROADWAY STREET SUITE 314C
ReturnHeader/Filer/USAddress/CityNm0BOULDER
ReturnHeader/Filer/USAddress/StateAbbreviationCd0CO
ReturnHeader/Filer/USAddress/ZIPCd080302
ReturnHeader/PreparerFirmGrp/PreparerFirmEIN0454570537
ReturnHeader/PreparerFirmGrp/PreparerFirmName/BusinessNameLine1Txt0MARJTAX INCORPORATED
ReturnHeader/PreparerFirmGrp/PreparerUSAddress/AddressLine1Txt03542 FRUITVALE- AVE PMB 227
ReturnHeader/PreparerFirmGrp/PreparerUSAddress/CityNm0OAKLAND
ReturnHeader/PreparerFirmGrp/PreparerUSAddress/StateAbbreviationCd0CA
ReturnHeader/PreparerFirmGrp/PreparerUSAddress/ZIPCd094602
ReturnHeader/PreparerPersonGrp/PhoneNum05104826204
ReturnHeader/PreparerPersonGrp/PreparationDt02026-03-24
ReturnHeader/PreparerPersonGrp/PreparerPersonNm0MARJORIE WILLIAMS-JONES
ReturnHeader/PreparerPersonGrp/SelfEmployedInd0X
ReturnHeader/ReturnTs02026-03-24T19:04:29-04:00
ReturnHeader/ReturnTypeCd0990EZ
ReturnHeader/TaxPeriodBeginDt02025-01-01
ReturnHeader/TaxPeriodEndDt02025-12-31
ReturnHeader/TaxYr02025

Document Assets

No mirrored PDF or thumbnail assets are attached yet.

Filings

Displayed year

2025 • Form 990EZDetailed filing. Detailed filing data is available for this year.

Open filing
Assets
$185,013
Liabilities
-
Net assets
$185,013
Revenue
$41,582
Expenses
$16,022
Net income
$25,560
Balance SheetOperations
YearAssetsLiabilitiesNet AssetsRevenueExpensesNet Income
2025Detailed filing. Detailed filing data is available for this year.$1.85$1.85$0.42$0.16$0.26
2024Detailed filing. Detailed filing data is available for this year.$1.52$1.52$1.62$0.07$1.54