Civic Intelligence

River Otter Ecology Project

990 • Fiscal year 2024 • EIN 45-4997526

Jan 01, 2024 to Dec 31, 2024 • Filed on Oct 31, 2025

Organization Profilewww.riverotterecology.org
P O Box 103Forest Knolls, CA 94933

(415) 342-4597

Siviq Scores

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

Liabilities / Assets

57th percentile

0.00x

Higher debt load relative to assets than 57% of similar nonprofits.

2024 filings • 501(c)3 • <$500k nonprofits • Source year 2024

Liabilities / Revenue

58th percentile

0.00x

Higher debt load relative to revenue than 58% of similar nonprofits.

2024 filings • 501(c)3 • <$500k nonprofits • Source year 2024

Net Margin

80th percentile

27%

Higher net margin than 80% of similar nonprofits.

2024 filings • 501(c)3 • <$500k nonprofits • Source year 2024

Top Officer Pay

98th percentile

$97,104

Higher top officer pay than 98% of similar nonprofits.

Top officer pay equals 40.2% of source-year revenue.

2024 filings • 501(c)3 • <$500k nonprofits • Source year 2024

Asset Growth

93rd percentile

119%

Faster asset growth than 93% of similar nonprofits.

2024 filings • 501(c)3 • <$500k nonprofits • Annualized from 2023 to 2024

Revenue Growth

80th percentile

42%

Faster revenue growth than 80% of similar nonprofits.

2024 filings • 501(c)3 • <$500k nonprofits • Annualized from 2023 to 2024

Balance Sheet
Liabilities / Assets57th percentile

Assets

Up

$118,805

Up $64,435 (+119%) from 2023

Net Assets

Up

$118,772

Up $64,452 (+119%) from 2023

Liabilities

Down

$33

Down $17 (-34%) from 2023

Revenue And Expenses
Liabilities / Revenue58th percentileNet Margin80th percentile

Revenue

Up

$241,321

Up $71,201 (+42%) from 2023

Expenses

Up

$176,868

Up $7,023 (+4.1%) from 2023

Net Income

Up

$64,453

Up $64,178 (+23337%) from 2023

Historical Trend

Balance Sheet Trend

Asset Growth93rd percentile

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

$150K$100K$50K$0Assets 2017: $50,837Liabilities 2017: $1,375Net Assets 2017: $49,4622017Assets 2018: $46,590Liabilities 2018: $1,685Net Assets 2018: $44,9052018Assets 2019: $56,217Liabilities 2019: $1,926Net Assets 2019: $54,2912019Assets 2020: $62,618Liabilities 2020: $1,828Net Assets 2020: $60,7902020Assets 2021: $68,772Liabilities 2021: $54Net Assets 2021: $68,7182021Assets 2022: $54,095Liabilities 2022: $50Net Assets 2022: $54,0452022Assets 2023: $54,370Liabilities 2023: $50Net Assets 2023: $54,3202023Assets 2024: $118,805Liabilities 2024: $33Net Assets 2024: $118,7722024

Highlighted filing

2024

Assets$118,805
Liabilities$33
Net Assets$118,772
Open 2024 Filing

Operations Trend

Revenue Growth80th percentile

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

$300K$200K$100K$0-$100KRevenue 2017: $80,493Expenses 2017: $71,274Net Income 2017: $9,2192017Revenue 2018: $101,276Expenses 2018: $105,833Net Income 2018: -$4,5572018Revenue 2019: $144,068Expenses 2019: $142,192Net Income 2019: $1,8762019Revenue 2020: $128,151Expenses 2020: $121,652Net Income 2020: $6,4992020Revenue 2021: $129,079Expenses 2021: $121,151Net Income 2021: $7,9282021Revenue 2022: $126,150Expenses 2022: $140,823Net Income 2022: -$14,6732022Revenue 2023: $170,120Expenses 2023: $169,845Net Income 2023: $2752023Revenue 2024: $241,321Expenses 2024: $176,868Net Income 2024: $64,4532024

Highlighted filing

2024

Revenue$241,321
Expenses$176,868
Net Income$64,453
Open 2024 Filing
Jump To
Filing Snapshot
Filing Period
Jan 1, 2024 to Dec 31, 2024
Signed
Oct 31, 2025
Return Version
2024v5.0
Gross Receipts
$241,526
Mission and Program Overview

Mission

Our mission is to engage the public in supporting conservation and restoration by linking river otter recovery to the health of our watersheds through education, research, and community science.

OUR MISSION is to create lasting protections for local waterways using community science, research, education, and advocacy. Our ambassador is the North American River Otter - an indicator of healthy waters. We are committed to making our work accessible, inclusive, and equitable, recognizing that environmental justice and the participation of every voice are essential for meaningful and lasting change.

Balance Sheet Detail
LineBeginningEndChange
Assets
Savings and Temporary Cash Investments$78$76,588▲ $76,510
Cash and Non-Interest-Bearing Accounts$48,685$35,895▼ $12,790
Accounts Receivable$2,550$4,241▲ $1,691
Inventories for Sale or Use$1,877$2,081▲ $204
Pledges and Grants Receivable$1,180$0▼ $1,180
Total Assets$54,370$118,805▲ $64,435
Liabilities
Other Liabilities$50$33▼ $17
Total Liabilities$50$33▼ $17
Net Assets / Fund Balance
Net Assets Without Donor Restrictions$50,887$114,772▲ $63,885
Net Assets With Donor Restrictions$3,433$4,000▲ $567
Total Net Assets Fund Balance$54,320$118,772▲ $64,452
Total Liabilities and Net Assets / Fund Balance$54,370$118,805▲ $64,435
Compensation and Service Providers
Top Officer Pay98th percentile

Employees

NameTitleFull / Part TimeBaseOtherTotal
Megan IsadoreExecutive DirectorFT$90,000$7,104$97,104
Terence CarrollPresidentFT$35,000-$35,000

Board Members and Trustees

NameTitle
Richard AbramsonVice President
Christine BanzonDirector
Mary Ellen KingSecretary
Colleen Haraden-GorskiTreasurer
Revenue and Support

Revenue Composition

Contributions and Grants
$239,901
Program Service Revenue
$0
Investment Income
$1,232
Other Revenue
$188
All Other Contributions
$237,160
Change in Net Assets
$64,453
Expenses and Functional Allocation

Major Expense Lines

Line ItemAmount
Salaries, Compensation, and Employee Benefits$141,113
Other Expenses$30,355
Total Fundraising Expense$5,941
Professional Fundraising Fees$5,400
Grants and Similar Amounts Paid$0

Functional Expense Allocation

Line ItemProgramManagementFundraisingTotal
Current Officers, Directors, Trustees, and Key Employees$119,384$11,907-$131,291
Payroll Taxes$8,840$982-$9,822
Office Expenses$6,801$152-$6,953
Fees for Services Other$6,000--$6,000
Other Expenses$5,851$0$0$5,851
Fees for Services Professional Fundraising--$5,400$5,400
Information Technology$670$2,784$541$3,995
All Other Expenses$3,209--$3,209
Travel$2,710--$2,710
Insurance$1,568$69-$1,637
Total Functional Expenses$155,033$15,894$5,941$176,868
Fundraising, Events, and Gaming
Fundraising activities
No
Gaming activities
No
Professional fundraiser used
No

Fundraising and Gaming Totals

Line ItemAmount
Professional Fundraising Fees$5,400
Political and Lobbying Activity
Political campaign activity
No
Lobbying activity
No
Subject to proxy tax
No
Debt and Bond Financing

Other Reported Liabilities

LiabilityAmount
Sales Tax Payable$33
Governance and Compliance

Governance Checklist

Compiled or reviewed by an accountant
No
Annual disclosure for covered persons
Yes
Business relationship with 35% controlled entity
No
Business relationship with family members
No
Business relationship with organization members
No
Material changes to governing documents
No
Compensation from other sources disclosed
No
CEO compensation reviewed
Yes
Other officer compensation reviewed
Yes
Conflict-of-interest policy
Yes
Audited financial statements prepared
No
Key decisions subject to board approval
No
Management duties delegated
No

Governance Explanations

Form 990, Part VI, Section A, Line 2

“Director Terence Carroll is the spouse of Executive Director Megan Isadore.”

Form 990, Part VI, Section B, Line 11B

“Form 990 is distributed to the Board for review prior to filing.”

Form 990, Part VI, Section B, Line 12C

“Board members are required to complete a conflict of interest statement and to disclose conflicts if and when they occur.”

Form 990, Part VI, Section B, Line 15

“The Executive Director's compensation package is reviewed and approved annually by the independent members of the Board after considering similar job positions in the area.”

Form 990, Part VI, Section C, Line 19

“All governing documents, policies, and financial statement are disclosed as required by law. The Form 990 is also available on Guidestar.org.”

Filing and Contact Details

Filer

Filer Name
River Otter Ecology Project
EIN
45-4997526
Phone
4153424597
Address
P O Box 103, Forest Knolls, CA 94933

Signing Officer

Name
Megan Isadore
Title
Executive Director
Phone
4153424597
Signed
2025-10-31

Organization Details

Principal Officer
Terence Carroll
Formed
2012
Legal Domicile
CA
Voting Board Members
6
Independent Board Members
4
Employees
2
Volunteers
35
Supplemental Narrative

Additional Explanations

Form 990, Part XI, Line 9

“Adjustment for rounding differerence.”

Raw XML Appendix378 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.

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IRS990/ActivityOrMissionDesc0OUR MISSION is to create lasting protections for local waterways using community science, research, education, and advocacy. Our ambassador is the North American River Otter - an indicator of healthy waters. We are committed to making our work accessible, inclusive, and equitable, recognizing that environmental justice and the participation of every voice are essential for meaningful and lasting change.
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IRS990/Desc0Our research helps to fill a gap in understanding of the range, reproduction, diet, health and general ecology of river otters in the San Francisco Bay Area and beyond. This information helps inform conservation strategies, including restoration projects and toxic spill response, and sheds light upon climate change effects on both otters and their food web. Because river otters are an indicator species, meaning their presence and health offer us information about the health of their watersheds, information we gather about their populations helps us better manage our shared watersheds. Since 2012, we have used crowd-sourcing, participatory science and a combination of technologies we adapted to help gather data and educate participants to document river otter presence in the San Francisco Bay Area, and now throughout the United States. We monitor the recovering population of river otters in a focal study area in Marin County, CA. Camera trapping is a relatively inexpensive method of collecting information on the abundance, pup emergence, and behavior of river otters, because it can be done with trained volunteers. Our field research is conducted by trained field and lab volunteers. We're dedicated to community science, and offer extensive training in field and lab techniques, habitat surveying, field sign and documentation to help our volunteers provide us with the data and samples we need to accomplish our research goals.
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IRS990/MissionDesc0Our mission is to engage the public in supporting conservation and restoration by linking river otter recovery to the health of our watersheds through education, research, advocacy, and community science.
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IRS990/ProgSrvcAccomActy2Grp/Desc0Education about the linkages among healthy otters, healthy watersheds, and healthy communities is as important as scientific research and discovery, and perhaps more important and useful to a wider range of people. As Wendell Berry says, "If we were sincerely looking for a place of safety, for real security and success, then we would begin to turn to our communities - and not the communities simply of our human neighbors but also of the water, earth, and air, the plants and animals, all the creatures with whom our local life is shared." That message resonates deeply with people who are offered concrete examples of nature's resilience, and our human capacity to mediate environmental mistakes. Our conservation goal is always to support and expand the public's understanding of and passion for the natural world. We provide education for adults and children on the importance of watershed health, using river otters as ambassadors, with the goal of helping support restoration and conservation of wetlands and watersheds.
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IRS990/ProgSrvcAccomActy3Grp/Desc0We engage people in supporting waterways in their own communities. Otters for Waters is a nationwide conservation initiative, aiming to protect and support waterways across the country, with river otters as charismatic ambassadors. Building on more than decade of community science, research, education, and advocacy, we are expanding our Otter Spotter program, which mobilizes people to document otter sightings, enabling them to take an active role in local conservation efforts. The Intent: To use the skills, knowledge, and technical expertise gained through the Otter Spotter program nationally, in order to increase our reach and influence throughout the United States in support of watershed conservation. The Vision: We envision a national web of connected projects using our collective data and the appeal of river otters as ambassadors for healthy waterways. River otters are indicators of waterway health and symbols of the success humans can achieve in restoring ecosystems for all species, including ourselves. The Plan Partner with local NGOs across the nation dedicated to watershed conservation. We have launched pilot programs in Virginia, Arizona, Utah, and Louisiana. We use their on-the-ground knowledge and connections along with our platform and expertise to help partners achieve their goals. The initiative's expansion is rooted in collaboration. Partnering with local organizations, Otters for Waters provides training, technical support, and tools to empower partners in their conservation goals. Partners provide the on-the-ground knowledge of the needs of local waterways. Our expansion vision is to create a national network of conservation advocates, leveraging the appeal of river otters to spark public interest and support waterway restorations and policies. Like all changes, it starts with a few drops that grow to ripples then waves of change.
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IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus2YearsAmt0112620
IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus3YearsAmt0120225
IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/CurrentTaxYearMinus4YearsAmt0124953
IRS990ScheduleA/GiftsGrantsContriRcvd170Grp/TotalAmt0767565
IRS990ScheduleA/GrossInvestmentIncome170Grp/CurrentTaxYearAmt01232
IRS990ScheduleA/GrossInvestmentIncome170Grp/TotalAmt01232
IRS990ScheduleA/PublicOrganization170Ind0X
IRS990ScheduleA/PublicSupportCY170Pct00.99840
IRS990ScheduleA/PublicSupportPY170Pct01
IRS990ScheduleA/PublicSupportTotal170Amt0767565
IRS990ScheduleA/ThirtyThrPctSuprtTestsCY170Ind0X
IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearAmt0239901
IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus1YearAmt0169866
IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus2YearsAmt0112620
IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus3YearsAmt0120225
IRS990ScheduleA/TotalCalendarYear170Grp/CurrentTaxYearMinus4YearsAmt0124953
IRS990ScheduleA/TotalCalendarYear170Grp/TotalAmt0767565
IRS990ScheduleA/TotalSupportAmt0768797
IRS990ScheduleB/ContributorInformationGrp/ContributorBusinessName/BusinessNameLine10RESTRICTED
IRS990ScheduleB/ContributorInformationGrp/ContributorNum0RESTRICTED
IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/AddressLine10RESTRICTED
IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/AddressLine20RESTRICTED
IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/City0RESTRICTED
IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/State0RESTRICTED
IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/ZIPCode0RESTRICTED
IRS990ScheduleB/ContributorInformationGrp/TotalContributionsAmt0RESTRICTED
IRS990/ScheduleBRequiredInd01
IRS990ScheduleD/FederalIncomeTaxLiabilityAmt00
IRS990ScheduleD/OtherLiabilitiesOrgGrp/Amt033
IRS990ScheduleD/OtherLiabilitiesOrgGrp/Desc0Sales Tax Payable
IRS990ScheduleD/TotalLiabilityAmt033
IRS990/ScheduleJRequiredInd00
IRS990/ScheduleORequiredInd01
IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt0Director Terence Carroll is the spouse of Executive Director Megan Isadore.
IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt1Form 990 is distributed to the Board for review prior to filing.
IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt2Board members are required to complete a conflict of interest statement and to disclose conflicts if and when they occur.
IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt3The Executive Director's compensation package is reviewed and approved annually by the independent members of the Board after considering similar job positions in the area.
IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt4All governing documents, policies, and financial statement are disclosed as required by law. The Form 990 is also available on Guidestar.org.
IRS990ScheduleO/SupplementalInformationDetail/ExplanationTxt5Adjustment for rounding differerence.
IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc0Form 990, Part VI, Section A, Line 2
IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc1Form 990, Part VI, Section B, Line 11b
IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc2Form 990, Part VI, Section B, Line 12c
IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc3Form 990, Part VI, Section B, Line 15
IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc4Form 990, Part VI, Section C, Line 19
IRS990ScheduleO/SupplementalInformationDetail/FormAndLineReferenceDesc5Form 990, Part XI, Line 9
IRS990/SchoolOperatingInd00
IRS990/SignificantChangeInd00
IRS990/SignificantNewProgramSrvcInd00
IRS990/StatesWhereCopyOfReturnIsFldCd0CA
IRS990/SubjectToExcsTaxNetInvstIncInd00
IRS990/SubjectToProxyTaxInd00
IRS990/SubjToTaxRmnrtnExPrchtPymtInd00
IRS990/TaxablePartyNotificationInd00
IRS990/TaxExemptBondsInd00
IRS990/TerminateOperationsInd00
IRS990/TotalAssetsBOYAmt054370
IRS990/TotalAssetsEOYAmt0118805
IRS990/TotalAssetsGrp/BOYAmt054370
IRS990/TotalAssetsGrp/EOYAmt0118805
IRS990/TotalCompGreaterThan150KInd00
IRS990/TotalContributionsAmt0239901
IRS990/TotalEmployeeCnt02
IRS990/TotalFunctionalExpensesGrp/FundraisingAmt05941
IRS990/TotalFunctionalExpensesGrp/ManagementAndGeneralAmt015894
IRS990/TotalFunctionalExpensesGrp/ProgramServicesAmt0155033
IRS990/TotalFunctionalExpensesGrp/TotalAmt0176868
IRS990/TotalGrossUBIAmt00
IRS990/TotalLiabilitiesBOYAmt050
IRS990/TotalLiabilitiesEOYAmt033
IRS990/TotalLiabilitiesGrp/BOYAmt050
IRS990/TotalLiabilitiesGrp/EOYAmt033
IRS990/TotalNetAssetsFundBalanceGrp/BOYAmt054320
IRS990/TotalNetAssetsFundBalanceGrp/EOYAmt0118772
IRS990/TotalOtherCompensationAmt07104
IRS990/TotalOtherProgSrvcExpenseAmt00
IRS990/TotalOtherProgSrvcGrantAmt00
IRS990/TotalOtherProgSrvcRevenueAmt00
IRS990/TotalProgramServiceExpensesAmt0155033
IRS990/TotalProgramServiceRevenueAmt00
IRS990/TotalReportableCompFromOrgAmt0125000
IRS990/TotalRevenueGrp/ExclusionAmt01420
IRS990/TotalRevenueGrp/RelatedOrExemptFuncIncomeAmt00
IRS990/TotalRevenueGrp/TotalRevenueColumnAmt0241321
IRS990/TotalRevenueGrp/UnrelatedBusinessRevenueAmt00
IRS990/TotalVolunteersCnt035
IRS990/TotLiabNetAssetsFundBalanceGrp/BOYAmt054370
IRS990/TotLiabNetAssetsFundBalanceGrp/EOYAmt0118805
IRS990/TotReportableCompRltdOrgAmt00
IRS990/TravelGrp/ProgramServicesAmt02710
IRS990/TravelGrp/TotalAmt02710
IRS990/TrnsfrExmptNonChrtblRltdOrgInd00
IRS990/TypeOfOrganizationCorpInd0X
IRS990/UnrelatedBusIncmOverLimitInd00
IRS990/UponRequestInd0X
IRS990/USAddress/AddressLine1Txt0PO Box 103
IRS990/USAddress/CityNm0Forest Knolls
IRS990/USAddress/StateAbbreviationCd0CA
IRS990/USAddress/ZIPCd094933
IRS990/VotingMembersGoverningBodyCnt06
IRS990/VotingMembersIndependentCnt04
IRS990/WebsiteAddressTxt0www.riverotterecology.org
IRS990/WhistleblowerPolicyInd01
ReturnHeader/BuildTS02025-03-06 01:10:19Z
ReturnHeader/BusinessOfficerGrp/PersonNm0Megan Isadore
ReturnHeader/BusinessOfficerGrp/PersonTitleTxt0Executive Director
ReturnHeader/BusinessOfficerGrp/PhoneNum04153424597
ReturnHeader/BusinessOfficerGrp/SignatureDt02025-10-31
ReturnHeader/Filer/BusinessName/BusinessNameLine1Txt0RIVER OTTER ECOLOGY PROJECT
ReturnHeader/Filer/BusinessNameControlTxt0RIVE
ReturnHeader/Filer/EIN0454997526
ReturnHeader/Filer/PhoneNum04153424597
ReturnHeader/Filer/USAddress/AddressLine1Txt0P O Box 103
ReturnHeader/Filer/USAddress/CityNm0Forest Knolls
ReturnHeader/Filer/USAddress/StateAbbreviationCd0CA
ReturnHeader/Filer/USAddress/ZIPCd094933
ReturnHeader/IRSResponsiblePrtyInfoCurrInd01
ReturnHeader/ReturnTs02025-11-05T14:38:22-07:00
ReturnHeader/ReturnTypeCd0990
ReturnHeader/TaxPeriodBeginDt02024-01-01
ReturnHeader/TaxPeriodEndDt02024-12-31
ReturnHeader/TaxYr02024

Document Assets

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Filings

Displayed year

2024 • Form 990Facts available. Structured filing facts are available, but richer extracted sections are limited.

Open filing
Assets
$118,805
Liabilities
$33
Net assets
$118,772
Revenue
$241,321
Expenses
$176,868
Net income
$64,453
Balance SheetOperations
YearAssetsLiabilitiesNet AssetsRevenueExpensesNet Income
2024Facts available. Structured filing facts are available, but richer extracted sections are limited.$1.19$0.00$1.19$2.41$1.77$0.64
2023XML pending. An XML filing is linked for this year, but detailed extraction is still pending.$0.54$0.00$0.54$1.70$1.70$0.00
2022XML pending. An XML filing is linked for this year, but detailed extraction is still pending.$0.54$0.00$0.54$1.26$1.41$0.15
2021XML pending. An XML filing is linked for this year, but detailed extraction is still pending.$0.69$0.00$0.69$1.29$1.21$0.08
2020XML pending. An XML filing is linked for this year, but detailed extraction is still pending.$0.63$0.02$0.61$1.28$1.22$0.06
2019XML pending. An XML filing is linked for this year, but detailed extraction is still pending.$0.56$0.02$0.54$1.44$1.42$0.02
2018XML pending. An XML filing is linked for this year, but detailed extraction is still pending.$0.47$0.02$0.45$1.01$1.06$0.05
2017XML pending. An XML filing is linked for this year, but detailed extraction is still pending.$0.51$0.01$0.49$0.80$0.71$0.09
Peer Organizations

Similar nonprofits based on the same Siviq industry and scale cohort. 2024 filings • 501(c)3 • <$500k nonprofits