The Mattis Family Foundation

EIN 35-2765948 • Greenwich, CT

Pub. 78 Eligible

77 Zaccheus Mead LnGreenwich, CT 06831

Siviq Scores

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

0.00x

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

<$500k nonprofits • Source year 2024

0.00x

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

<$500k nonprofits • Source year 2024

-33%

Higher net margin than 20% of similar nonprofits.

<$500k nonprofits • Source year 2024

Higher top officer pay than 81% of similar nonprofits.

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

<$500k nonprofits • Source year 2024

-2.3%

Faster asset growth than 50% of similar nonprofits.

<$500k nonprofits • Annualized from 2023 to 2024

-11%

Faster revenue growth than 40% of similar nonprofits.

<$500k nonprofits • Annualized from 2023 to 2024

Balance Sheet

Liabilities / Assets63rd percentile

Assets

Down

$343,733

Down $8,001 (-2.3%) from 2023

Liabilities

Flat

Flat from 2023

Net Assets

Down

$343,733

Down $8,001 (-2.3%) from 2023

Operations

Liabilities / Revenue66th percentile Net Margin20th percentile

Revenue

Down

$24,193

Down $2,932 (-11%) from 2023

Expenses

$32,206

Up $15,409 (+92%) from 2023

Net Income

Down

-$8,013

Down $18,341 (-178%) from 2023

Trend Graphs

Balance Sheet Trend

Asset Growth50th percentile

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

Highlighted filing

2024

Assets$343,733

Liabilities$0

Net Assets$343,733

Open 2024 Filing

Operations Trend

Revenue Growth40th percentile

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

Highlighted filing

2024

Revenue$24,193

Expenses$32,206

Net Income-$8,013

Open 2024 Filing

Filings

Most recent year

2024 • Form 990PFDetailed filing. Detailed filing data is available for this year.

Open filing

Assets: $343,733
Liabilities: $0
Net assets: $343,733
Revenue: $24,193
Expenses: $32,206
Net income: -$8,013

	Balance Sheet			Operations
Year	Assets	Liabilities	Net Assets	Revenue	Expenses	Net Income
2024Detailed filing. Detailed filing data is available for this year.	$3.44	$0.00	$3.44	$0.24	$0.32	$0.08
2023Detailed filing. Detailed filing data is available for this year.	$3.52	$0.00	$3.52	$0.27	$0.17	$0.10
2022Detailed filing. Detailed filing data is available for this year.	$3.35	$0.00	$3.35	$3.42	$0.00	$3.42

Latest Filing Detail

Jump To

Filing Snapshot

Filing Period: Jan 1, 2024 to Dec 31, 2024
Signed: Sep 9, 2025
Return Version: 2024v5.2

Compensation and Service Providers

Top Officer Pay81st percentile

Employees

Name	Title	Full / Part Time	Base	Other	Total
KATHRYN MATTIS	Chairman & Secretarty	-	$0	-	-
PETER MATTIS	Treasurer	-	$0	-	-

Filing and Contact Details

Filer

Filer Name: The Mattis Family Foundation
EIN: 35-2765948
Phone: 6467083013
Address: 77 ZACCHEUS MEAD LN, GREENWICH, CT 06831

Signing Officer

Name: Kathryn Mattis
Title: Chairman & Secretary
Phone: 6467083013
Signed: 2025-09-09
Discuss with paid preparer: Yes

Preparer

Firm: Altum Pr LLC
Address: RQ
Preparer: John T Advani
Phone: 4083200260

Raw XML Appendix331 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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IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/Amt	0	10000
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/GrantOrContributionPurposeTxt	0	PROVIDING RESOURCES AND INFORMATION TO FAMILIES IN NEED WITH CHILDREN IN SPECIAL EDUCATION
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientBusinessName/BusinessNameLine1Txt	0	THE NATIONAL AUDUBON SOCIETY
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientFoundationStatusTxt	0	PC
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientRelationshipTxt	0	NONE
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/AddressLine1Txt	0	613 RIVERSVILLE RD
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/CityNm	0	GREENWICH
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/StateAbbreviationCd	0	CT
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/ZIPCd	0	06831
IRS990PF/SupplementaryInformationGrp/OnlyContriToPreselectedInd	0	X
IRS990PF/SupplementaryInformationGrp/TotalGrantOrContriApprvFutAmt	0	0
IRS990PF/SupplementaryInformationGrp/TotalGrantOrContriPdDurYrAmt	0	10000
IRS990PF/TrnsfrTransRlnNonchrtblEOGrp/LoansOrLoanGuaranteesInd	0	0
IRS990PF/TrnsfrTransRlnNonchrtblEOGrp/PerformanceOfServicesEtcInd	0	0
IRS990PF/TrnsfrTransRlnNonchrtblEOGrp/PurchaseOfAssetsNonchrtblEOInd	0	0
IRS990PF/TrnsfrTransRlnNonchrtblEOGrp/ReimbursementArrangementsInd	0	0
IRS990PF/TrnsfrTransRlnNonchrtblEOGrp/RelationshipsNonchrtblEOInd	0	0
IRS990PF/TrnsfrTransRlnNonchrtblEOGrp/RentalOfFacilitiesOthAssetsInd	0	0
IRS990PF/TrnsfrTransRlnNonchrtblEOGrp/SalesOrExchangesOfAssetsInd	0	0
IRS990PF/TrnsfrTransRlnNonchrtblEOGrp/SharingOfFacilitiesEtcInd	0	0
IRS990PF/TrnsfrTransRlnNonchrtblEOGrp/TrnsfrOfCashToNonchrtblEOInd	0	0
IRS990PF/TrnsfrTransRlnNonchrtblEOGrp/TrnsfrOtherAssetNonchrtblEOInd	0	0
IRS990PF/UndistributedIncomeGrp/AppliedToCurrentYearAmt	0	6810
IRS990PF/UndistributedIncomeGrp/AppliedToPriorYearsAmt	0	0
IRS990PF/UndistributedIncomeGrp/AppliedToYear1Amt	0	9187
IRS990PF/UndistributedIncomeGrp/CorpusDistri170b1EOr4942g3Amt	0	0
IRS990PF/UndistributedIncomeGrp/DistributableAsAdjustedAmt	0	20168
IRS990PF/UndistributedIncomeGrp/ExcessDistributionCyovAppCYAmt	0	0
IRS990PF/UndistributedIncomeGrp/ExcessDistriCyovAppCYCorpusAmt	0	0
IRS990PF/UndistributedIncomeGrp/ExcessDistriCyovFromYr5Amt	0	0
IRS990PF/UndistributedIncomeGrp/ExcessDistriCyovToNextYrAmt	0	0
IRS990PF/UndistributedIncomeGrp/PriorYearDeficiencyOrTaxAmt	0	0
IRS990PF/UndistributedIncomeGrp/PriorYearUndistributedIncmAmt	0	0
IRS990PF/UndistributedIncomeGrp/QualifyingDistributionsAmt	0	15997
IRS990PF/UndistributedIncomeGrp/RemainingDistriFromCorpusAmt	0	0
IRS990PF/UndistributedIncomeGrp/Taxable1Amt	0	0
IRS990PF/UndistributedIncomeGrp/Taxable2Amt	0	0
IRS990PF/UndistributedIncomeGrp/TotalCorpusAmt	0	0
IRS990PF/UndistributedIncomeGrp/TotalExcessDistributionCyovAmt	0	0
IRS990PF/UndistributedIncomeGrp/TotalForPriorYearsAmt	0	0
IRS990PF/UndistributedIncomeGrp/TreatedAsDistriFromCorpusAmt	0	0
IRS990PF/UndistributedIncomeGrp/UndistributedIncomeCYAmt	0	13358
IRS990PF/UndistributedIncomeGrp/UndistributedIncomePYAmt	0	9187
IRS990ScheduleB/ContributorInformationGrp/ContributorNum	0	1
IRS990ScheduleB/ContributorInformationGrp/ContributorPersonNm	0	PETER AND KATHRYN MATTIS
IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/AddressLine1Txt	0	77 ZACCHEUS MEAD LANE
IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/CityNm	0	GREENWICH
IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/StateAbbreviationCd	0	CT
IRS990ScheduleB/ContributorInformationGrp/ContributorUSAddress/ZIPCd	0	06831
IRS990ScheduleB/ContributorInformationGrp/PersonContributionInd	0	X
IRS990ScheduleB/ContributorInformationGrp/TotalContributionsAmt	0	9692
IRS990ScheduleB/GeneralRuleInd	0	X
IRS990ScheduleB/Organization501c3ExemptPFInd	0	X
LegalFeesSchedule/LegalFeesGrp/CategoryTxt	0	LEGAL EXPENSES
LegalFeesSchedule/LegalFeesGrp/DisbursementsCharitablePrpsAmt	0	440
LegalFeesSchedule/LegalFeesGrp/LegalFeesAmt	0	440
LegalFeesSchedule/LegalFeesGrp/NetInvestmentIncomeAmt	0	0
OtherIncreasesSchedule/OtherIncreasesDetail/Amt	0	12
OtherIncreasesSchedule/OtherIncreasesDetail/Desc	0	BOOK-TAX DIFFERENCE
OtherProfessionalFeesSchedule/OtherProfessionalFeesDetail/Amt	0	2764
OtherProfessionalFeesSchedule/OtherProfessionalFeesDetail/CategoryTxt	0	MANGEMENT ADVISORY FEES
OtherProfessionalFeesSchedule/OtherProfessionalFeesDetail/DisbursementsCharitablePrpsAmt	0	0
OtherProfessionalFeesSchedule/OtherProfessionalFeesDetail/NetInvestmentIncomeAmt	0	2764
SubstantialContributorsSch/SubstantialContributorDetail/PersonNm	0	KATHRYN MATTIS
SubstantialContributorsSch/SubstantialContributorDetail/PersonNm	1	PETER MATTIS
SubstantialContributorsSch/SubstantialContributorDetail/USAddress/AddressLine1Txt	0	77 ZACCHEUS MEAD LANE
SubstantialContributorsSch/SubstantialContributorDetail/USAddress/AddressLine1Txt	1	77 ZACCHEUS MEAD LANE
SubstantialContributorsSch/SubstantialContributorDetail/USAddress/CityNm	0	GREENWICH
SubstantialContributorsSch/SubstantialContributorDetail/USAddress/CityNm	1	GREENWICH
SubstantialContributorsSch/SubstantialContributorDetail/USAddress/StateAbbreviationCd	0	CT
SubstantialContributorsSch/SubstantialContributorDetail/USAddress/StateAbbreviationCd	1	CT
SubstantialContributorsSch/SubstantialContributorDetail/USAddress/ZIPCd	0	06831
SubstantialContributorsSch/SubstantialContributorDetail/USAddress/ZIPCd	1	06831
TaxesSchedule/TaxesDetail/Amt	0	110
TaxesSchedule/TaxesDetail/Amt	1	5000
TaxesSchedule/TaxesDetail/CategoryTxt	0	FOREIGN TAXES
TaxesSchedule/TaxesDetail/CategoryTxt	1	INTERNAL REVENUE SERVICE
TaxesSchedule/TaxesDetail/DisbursementsCharitablePrpsAmt	0	0
TaxesSchedule/TaxesDetail/DisbursementsCharitablePrpsAmt	1	0
TaxesSchedule/TaxesDetail/NetInvestmentIncomeAmt	0	110
TaxesSchedule/TaxesDetail/NetInvestmentIncomeAmt	1	0
ReturnHeader/BuildTS	0	2025-03-06 01:10:19Z
ReturnHeader/BusinessOfficerGrp/DiscussWithPaidPreparerInd	0	1
ReturnHeader/BusinessOfficerGrp/PersonNm	0	KATHRYN MATTIS
ReturnHeader/BusinessOfficerGrp/PersonTitleTxt	0	CHAIRMAN & SECRETARY
ReturnHeader/BusinessOfficerGrp/PhoneNum	0	6467083013
ReturnHeader/BusinessOfficerGrp/SignatureDt	0	2025-09-09
ReturnHeader/Filer/BusinessName/BusinessNameLine1Txt	0	THE MATTIS FAMILY FOUNDATION
ReturnHeader/Filer/BusinessNameControlTxt	0	MATT
ReturnHeader/Filer/EIN	0	352765948
ReturnHeader/Filer/PhoneNum	0	6467083013
ReturnHeader/Filer/USAddress/AddressLine1Txt	0	77 ZACCHEUS MEAD LN
ReturnHeader/Filer/USAddress/CityNm	0	GREENWICH
ReturnHeader/Filer/USAddress/StateAbbreviationCd	0	CT
ReturnHeader/Filer/USAddress/ZIPCd	0	06831
ReturnHeader/IRSResponsiblePrtyInfoCurrInd	0	1
ReturnHeader/PreparerFirmGrp/PreparerFirmEIN	0	660974586
ReturnHeader/PreparerFirmGrp/PreparerFirmName/BusinessNameLine1Txt	0	ALTUM PR LLC
ReturnHeader/PreparerFirmGrp/PreparerForeignAddress/AddressLine1Txt	0	1225 PONCE DE LEON AVENUE SUITE
ReturnHeader/PreparerFirmGrp/PreparerForeignAddress/AddressLine2Txt	0	GF-1
ReturnHeader/PreparerFirmGrp/PreparerForeignAddress/CityNm	0	SAN JUAN
ReturnHeader/PreparerFirmGrp/PreparerForeignAddress/CountryCd	0	RQ
ReturnHeader/PreparerFirmGrp/PreparerForeignAddress/ForeignPostalCd	0	00907
ReturnHeader/PreparerPersonGrp/PhoneNum	0	4083200260
ReturnHeader/PreparerPersonGrp/PreparerPersonNm	0	JOHN T ADVANI
ReturnHeader/PreparerPersonGrp/SelfEmployedInd	0	X
ReturnHeader/ReturnTs	0	2025-09-09T09:33:15-05:00
ReturnHeader/ReturnTypeCd	0	990PF
ReturnHeader/TaxPeriodBeginDt	0	2024-01-01
ReturnHeader/TaxPeriodEndDt	0	2024-12-31
ReturnHeader/TaxYr	0	2024

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