Civic Intelligence

Sonnentag Foundation Ltd

EIN 39-1597420 • Marathon, WI

PO Box 100Marathon, WI 54448
Siviq Scores

Precomputed percentiles relative to similar nonprofits. These scores are descriptive rather than judgmental.

Liabilities / Assets

15th percentile

0.00x

Tied with the lowest-debt nonprofits in its peer group.

$25M-$50M nonprofits • Source year 2024

Liabilities / Revenue

16th percentile

0.00x

Tied with the lowest-debt nonprofits in its peer group.

$25M-$50M nonprofits • Source year 2024

Net Margin

84th percentile

43%

Higher net margin than 84% of similar nonprofits.

$25M-$50M nonprofits • Source year 2024

Top Officer Pay

19th percentile

$0

Higher top officer pay than 19% of similar nonprofits.

$25M-$50M nonprofits • Source year 2025

Asset Growth

84th percentile

19%

Faster asset growth than 84% of similar nonprofits.

$25M-$50M nonprofits • Annualized from 2023 to 2024

Revenue Growth

92nd percentile

159%

Faster revenue growth than 92% of similar nonprofits.

$25M-$50M nonprofits • Annualized from 2023 to 2024

Balance Sheet
Liabilities / Assets15th percentile

Using 2024 Form 990PF data because the latest 2025 filing does not report standard financial totals.

Assets

Up

$45,256,271

Up $7,231,332 (+19%) from 2023

Liabilities

Flat

$0

Flat from 2023

Net Assets

Up

$45,256,271

Up $7,231,332 (+19%) from 2023

Operations
Liabilities / Revenue16th percentileNet Margin84th percentile

Revenue

Up

$16,784,819

Up $10,307,694 (+159%) from 2023

Expenses

Up

$9,553,487

Up $8,354,427 (+697%) from 2023

Net Income

Up

$7,231,332

Up $1,953,267 (+37%) from 2023

Trend Graphs

Balance Sheet Trend

Asset Growth84th percentile

Grouped bars show assets, liabilities, and net assets across loaded filings.

$80M$60M$40M$20M$0Assets 2011: $446,687Liabilities 2011: $464,7412011Assets 2012: $7,442,220Liabilities 2012: $472,0162012Assets 2013: $23,498,275Liabilities 2013: $02013Assets 2014: $25,100,605Liabilities 2014: $02014Assets 2015: $25,576,038Liabilities 2015: $1,000,0002015Assets 2019: $32,354,422Liabilities 2019: $0Net Assets 2019: $32,354,4222019Assets 2020: $56,867,665Liabilities 2020: $0Net Assets 2020: $56,867,6652020Assets 2021: $69,364,441Liabilities 2021: $0Net Assets 2021: $69,364,4412021Assets 2022: $32,746,874Liabilities 2022: $0Net Assets 2022: $32,746,8742022Assets 2023: $38,024,939Liabilities 2023: $0Net Assets 2023: $38,024,9392023Assets 2024: $45,256,271Liabilities 2024: $0Net Assets 2024: $45,256,2712024

Latest loaded filing

2024

Assets$45,256,271
Liabilities$0
Net Assets$45,256,271
Open 2024 Filing

Operations Trend

Revenue Growth92nd percentile

Revenue, expenses, and net income by year, with the latest filing highlighted.

$40M$20M$0-$20M-$40MRevenue 2011: $138,373Expenses 2011: $147,368Net Income 2011: -$8,9952011Revenue 2012: $7,076,807Expenses 2012: $88,549Net Income 2012: $6,988,2582012Revenue 2013: $16,820,877Expenses 2013: $292,806Net Income 2013: $16,528,0712013Revenue 2014: $1,858,281Expenses 2014: $255,951Net Income 2014: $1,602,3302014Revenue 2015: $1,909,148Expenses 2015: $2,433,715Net Income 2015: -$524,5672015Revenue 2019: $7,316,130Expenses 2019: $3,032,775Net Income 2019: $4,283,3552019Revenue 2020: $25,446,722Expenses 2020: $933,479Net Income 2020: $24,513,2432020Revenue 2021: $13,297,469Expenses 2021: $800,693Net Income 2021: $12,496,7762021Revenue 2022: -$29,257,914Expenses 2022: $7,359,653Net Income 2022: -$36,617,5672022Revenue 2023: $6,477,125Expenses 2023: $1,199,060Net Income 2023: $5,278,0652023Revenue 2024: $16,784,819Expenses 2024: $9,553,487Net Income 2024: $7,231,3322024

Latest loaded filing

2024

Revenue$16,784,819
Expenses$9,553,487
Net Income$7,231,332
Open 2024 Filing

Filings

Most recent year

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

Open filing
Assets
-
Liabilities
-
Net assets
-
Revenue
-
Expenses
-
Net income
-
Balance SheetOperations
YearAssetsLiabilitiesNet AssetsRevenueExpensesNet Income
2025Detailed filing. Detailed filing data is available for this year.
2024Detailed filing. Detailed filing data is available for this year.$45.3$0.00$45.3$16.8$9.55$7.23
2023XML pending. An XML filing is linked for this year, but detailed extraction is still pending.$38.0$0.00$38.0$6.48$1.20$5.28
2022Detailed filing. Detailed filing data is available for this year.$32.7$0.00$32.7$29.3$7.36$36.6
2021XML pending. An XML filing is linked for this year, but detailed extraction is still pending.$69.4$0.00$69.4$13.3$0.80$12.5
2020Detailed filing. Detailed filing data is available for this year.$56.9$0.00$56.9$25.4$0.93$24.5
2019XML pending. An XML filing is linked for this year, but detailed extraction is still pending.$32.4$0.00$32.4$7.32$3.03$4.28
2015Summary only. Only limited summary data is available for this year.$25.6$1.00$1.91$2.43$0.52
2014Summary only. Only limited summary data is available for this year.$25.1$0.00$1.86$0.26$1.60
2013Summary only. Only limited summary data is available for this year.$23.5$0.00$16.8$0.29$16.5
2012Summary only. Only limited summary data is available for this year.$7.44$0.47$7.08$0.09$6.99
2011Summary only. Only limited summary data is available for this year.$0.45$0.46$0.14$0.15$0.01
Latest Filing Detail
Jump To
Filing Snapshot
Filing Period
Jan 1, 2025 to Dec 31, 2025
Signed
Mar 16, 2026
Return Version
2025v4.0
Compensation and Service Providers
Top Officer Pay19th percentile

Employees

NameTitleFull / Part TimeBaseOtherTotal
JOHN SONNENTAGPresident-$0--
CAROLYN SONNENTAGVice President Part Time-$0--
BILL SONNENTAGDirector Part Time-$0--
Grants and Assistance

Foundation Grants and Related Investments

TypeRecipientPurposeStatusLocationAmount
Paid GrantALL-SEE ATTACHEDCHARITABLE DONATIONS-Marathon, WI, US$6,371,389
Filing and Contact Details

Filer

Filer Name
Sonnentag Foundation Ltd
EIN
39-1597420
In Care Of
% CAROLYN SONNENTAG
Phone
7158481365
Address
PO BOX 100, MARATHON, WI 54448

Signing Officer

Name
Carolyn Sonnentag
Title
Vice President
Phone
7158481365
Signed
2026-03-16
Discuss with paid preparer
No

Preparer

Preparer
Bob Stoehr
Raw XML Appendix300 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
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IRS990PF/PFQualifyingDistributionsGrp/QualifyingDistributionsAmt06371389
IRS990PF/StatementsRegardingActy4720Grp/BrrwOrLendDisqualifiedPrsnInd0false
IRS990PF/StatementsRegardingActy4720Grp/BusinessHoldingsInd0false
IRS990PF/StatementsRegardingActy4720Grp/FurnGoodsDisqualifiedPrsnInd0false
IRS990PF/StatementsRegardingActy4720Grp/GrantsToIndividualsInd0false
IRS990PF/StatementsRegardingActy4720Grp/GrantsToOrganizationsInd0false
IRS990PF/StatementsRegardingActy4720Grp/InfluenceElectionInd0false
IRS990PF/StatementsRegardingActy4720Grp/InfluenceLegislationInd0false
IRS990PF/StatementsRegardingActy4720Grp/JeopardyInvestmentsInd0false
IRS990PF/StatementsRegardingActy4720Grp/MaintainedExpenditureRspnsInd0false
IRS990PF/StatementsRegardingActy4720Grp/NoncharitablePurposeInd0false
IRS990PF/StatementsRegardingActy4720Grp/PayCompDisqualifiedPrsnInd0false
IRS990PF/StatementsRegardingActy4720Grp/PaymentToGovernmentOfficialInd0false
IRS990PF/StatementsRegardingActy4720Grp/PayPremiumsPrsnlBnftCntrctInd0false
IRS990PF/StatementsRegardingActy4720Grp/ProhibitedTaxShelterTransInd0false
IRS990PF/StatementsRegardingActy4720Grp/RcvFndsToPayPrsnlBnftCntrctInd0false
IRS990PF/StatementsRegardingActy4720Grp/SaleOrExchDisqualifiedPrsnInd0false
IRS990PF/StatementsRegardingActy4720Grp/SubjToTaxRmnrtnExPrchtPymtInd0false
IRS990PF/StatementsRegardingActy4720Grp/TransferAstDisqualifiedPrsnInd0false
IRS990PF/StatementsRegardingActy4720Grp/UncorrectedPriorActsInd0false
IRS990PF/StatementsRegardingActy4720Grp/UncorrectedPYJeopardyInvstInd0false
IRS990PF/StatementsRegardingActy4720Grp/UndistributedIncomePYInd0false
IRS990PF/StatementsRegardingActyGrp/ActivitiesNotPreviouslyRptInd0false
IRS990PF/StatementsRegardingActyGrp/AtLeast5000InAssetsInd0true
IRS990PF/StatementsRegardingActyGrp/ChangesToArticlesOrBylawsInd0false
IRS990PF/StatementsRegardingActyGrp/ComplyWithPublicInspRqrInd0true
IRS990PF/StatementsRegardingActyGrp/DonorAdvisedFundInd0false
IRS990PF/StatementsRegardingActyGrp/ForeignAccountsQuestionInd0false
IRS990PF/StatementsRegardingActyGrp/Form1120POLFiledInd0false
IRS990PF/StatementsRegardingActyGrp/Form990PFFiledWithAttyGenInd0true
IRS990PF/StatementsRegardingActyGrp/IndividualWithBooksNm0CAROLYN SONNENTAG
IRS990PF/StatementsRegardingActyGrp/LegislativePoliticalActyInd0false
IRS990PF/StatementsRegardingActyGrp/LocationOfBooksUSAddress/AddressLine1Txt0PO BOX 435
IRS990PF/StatementsRegardingActyGrp/LocationOfBooksUSAddress/CityNm0ASTATULA
IRS990PF/StatementsRegardingActyGrp/LocationOfBooksUSAddress/StateAbbreviationCd0FL
IRS990PF/StatementsRegardingActyGrp/LocationOfBooksUSAddress/ZIPCd034705
IRS990PF/StatementsRegardingActyGrp/MoreThan100SpentInd0false
IRS990PF/StatementsRegardingActyGrp/NewSubstantialContributorsInd0false
IRS990PF/StatementsRegardingActyGrp/OrgReportOrRegisterStateCd0WI
IRS990PF/StatementsRegardingActyGrp/OwnControlledEntityInd0false
IRS990PF/StatementsRegardingActyGrp/PhoneNum07158481365
IRS990PF/StatementsRegardingActyGrp/PrivateOperatingFoundationInd0false
IRS990PF/StatementsRegardingActyGrp/Section508eRqrSatisfiedInd0true
IRS990PF/StatementsRegardingActyGrp/UnrelatedBusIncmOverLimitInd0false
IRS990PF/StatementsRegardingActyGrp/WebsiteAddressTxt0WWW.GUIDESTAR.COM
IRS990PF/SummaryOfDirectChrtblActyGrp/Description1Txt0DISBURSEMENTS FOR SCHOLARSHIPS AND CHARITIES
IRS990PF/SummaryOfDirectChrtblActyGrp/Expenses1Amt00
IRS990PF/SupplementaryInformationGrp/ApplicationSubmissionInfoGrp/FormAndInfoAndMaterialsTxt0APPLICATIONS
IRS990PF/SupplementaryInformationGrp/ApplicationSubmissionInfoGrp/RecipientPersonNm0CAROLYN SONNENTAG
IRS990PF/SupplementaryInformationGrp/ApplicationSubmissionInfoGrp/RecipientPhoneNum07158481365
IRS990PF/SupplementaryInformationGrp/ApplicationSubmissionInfoGrp/RecipientUSAddress/AddressLine1Txt0PO BOX 435
IRS990PF/SupplementaryInformationGrp/ApplicationSubmissionInfoGrp/RecipientUSAddress/CityNm0ASTATULA
IRS990PF/SupplementaryInformationGrp/ApplicationSubmissionInfoGrp/RecipientUSAddress/StateAbbreviationCd0FL
IRS990PF/SupplementaryInformationGrp/ApplicationSubmissionInfoGrp/RecipientUSAddress/ZIPCd034705
IRS990PF/SupplementaryInformationGrp/ApplicationSubmissionInfoGrp/RestrictionsOnAwardsTxt0EDUCATIONAL AWARDS/LOCAL SCHOLARSHIPS/RELIGIOUS NEEDS/NON-PROFIT NEEDS
IRS990PF/SupplementaryInformationGrp/ApplicationSubmissionInfoGrp/SubmissionDeadlinesTxt0NONE
IRS990PF/SupplementaryInformationGrp/ContributingManagerNm0CAROLYN SONNENTAG
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/Amt06371389
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/GrantOrContributionPurposeTxt0CHARITABLE DONATIONS
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientBusinessName/BusinessNameLine1Txt0ALL-SEE ATTACHED
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientFoundationStatusCd0NC
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientRelationshipTxt0NONE
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/AddressLine1Txt0PO Box 100
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/CityNm0Marathon
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/StateAbbreviationCd0WI
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/ZIPCd054448
IRS990PF/SupplementaryInformationGrp/ShareholderManagerNm0NONE
IRS990PF/SupplementaryInformationGrp/TotalGrantOrContriPdDurYrAmt06371389
IRS990PF/TrnsfrTransRlnNonchrtblEOGrp/LoansOrLoanGuaranteesInd0false
IRS990PF/TrnsfrTransRlnNonchrtblEOGrp/PerformanceOfServicesEtcInd0false
IRS990PF/TrnsfrTransRlnNonchrtblEOGrp/PurchaseOfAssetsNonchrtblEOInd0false
IRS990PF/TrnsfrTransRlnNonchrtblEOGrp/ReimbursementArrangementsInd0false
IRS990PF/TrnsfrTransRlnNonchrtblEOGrp/RelationshipsNonchrtblEOInd0false
IRS990PF/TrnsfrTransRlnNonchrtblEOGrp/RentalOfFacilitiesOthAssetsInd0false
IRS990PF/TrnsfrTransRlnNonchrtblEOGrp/SalesOrExchangesOfAssetsInd0false
IRS990PF/TrnsfrTransRlnNonchrtblEOGrp/SharingOfFacilitiesEtcInd0false
IRS990PF/TrnsfrTransRlnNonchrtblEOGrp/TransferScheduleDetail/InvolvedAmt04000000
IRS990PF/TrnsfrTransRlnNonchrtblEOGrp/TransferScheduleDetail/LineNumberTxt01a(1)
IRS990PF/TrnsfrTransRlnNonchrtblEOGrp/TransferScheduleDetail/NoncharitableExemptOrgName/BusinessNameLine1Txt0MARATHON COUNTY HISTORICAL SOCIETY
IRS990PF/TrnsfrTransRlnNonchrtblEOGrp/TransferScheduleDetail/TransfersTransAndShrArrngmDesc0CASH DONATION
IRS990PF/TrnsfrTransRlnNonchrtblEOGrp/TrnsfrOfCashToNonchrtblEOInd0true
IRS990PF/TrnsfrTransRlnNonchrtblEOGrp/TrnsfrOtherAssetNonchrtblEOInd0false
IRS990PF/UndistributedIncomeGrp/DistributableAsAdjustedAmt00
IRS990PF/UndistributedIncomeGrp/ExcessDistributionCyovYr1Amt07363765
IRS990PF/UndistributedIncomeGrp/ExcessDistributionCyovYr3Amt01708504
IRS990PF/UndistributedIncomeGrp/ExcessDistriCyovToNextYrAmt015443658
IRS990PF/UndistributedIncomeGrp/ExcessFromCurrentYearAmt06371389
IRS990PF/UndistributedIncomeGrp/ExcessFromYear1Amt07363765
IRS990PF/UndistributedIncomeGrp/ExcessFromYear3Amt01708504
IRS990PF/UndistributedIncomeGrp/QualifyingDistributionsAmt06371389
IRS990PF/UndistributedIncomeGrp/RemainingDistriFromCorpusAmt06371389
IRS990PF/UndistributedIncomeGrp/TotalCorpusAmt015443658
IRS990PF/UndistributedIncomeGrp/TotalExcessDistributionCyovAmt09072269
IRS990PF/UndistributedIncomeGrp/UndistributedIncomeCYAmt00
IRS990ScheduleB/ContributorInformationGrp/ContributorNum03
IRS990ScheduleB/ContributorInformationGrp/ContributorPersonNm0Carolyn Sonnentag
IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/AddressLine1Txt0PO BOX 435
IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/CityNm0ASTATULA
IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/StateAbbreviationCd0FL
IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/ZIPCd034705
IRS990ScheduleB/ContributorInformationGrp/PersonContributionInd0X
IRS990ScheduleB/ContributorInformationGrp/TotalContributionsAmt02027000
IRS990ScheduleB/Organization501c3ExemptPFInd0X
OtherExpensesSchedule/OtherExpensesScheduleGrp/Desc0PENALTIES
OtherExpensesSchedule/OtherExpensesScheduleGrp/RevenueAndExpensesPerBooksAmt05504
OtherProfessionalFeesSchedule/OtherProfessionalFeesDetail/Amt06417
OtherProfessionalFeesSchedule/OtherProfessionalFeesDetail/CategoryTxt0BROKER
TaxesSchedule/TaxesDetail/Amt084903
TaxesSchedule/TaxesDetail/CategoryTxt0INCOME TAX
ReturnHeader/BuildTS02025-03-06 01:10:19Z
ReturnHeader/BusinessOfficerGrp/DiscussWithPaidPreparerInd0false
ReturnHeader/BusinessOfficerGrp/PersonNm0CAROLYN SONNENTAG
ReturnHeader/BusinessOfficerGrp/PersonTitleTxt0VICE PRESIDENT
ReturnHeader/BusinessOfficerGrp/PhoneNum07158481365
ReturnHeader/BusinessOfficerGrp/SignatureDt02026-03-16
ReturnHeader/Filer/BusinessName/BusinessNameLine1Txt0SONNENTAG FOUNDATION LTD
ReturnHeader/Filer/BusinessNameControlTxt0SONN
ReturnHeader/Filer/EIN0391597420
ReturnHeader/Filer/InCareOfNm0% CAROLYN SONNENTAG
ReturnHeader/Filer/PhoneNum07158481365
ReturnHeader/Filer/USAddress/AddressLine1Txt0PO BOX 100
ReturnHeader/Filer/USAddress/CityNm0MARATHON
ReturnHeader/Filer/USAddress/StateAbbreviationCd0WI
ReturnHeader/Filer/USAddress/ZIPCd054448
ReturnHeader/PreparerPersonGrp/PreparationDt02026-03-16
ReturnHeader/PreparerPersonGrp/PreparerPersonNm0Bob Stoehr
ReturnHeader/ReturnTs02026-03-16T11:13:10-00:00
ReturnHeader/ReturnTypeCd0990PF
ReturnHeader/TaxPeriodBeginDt02025-01-01
ReturnHeader/TaxPeriodEndDt02025-12-31
ReturnHeader/TaxYr02025

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