Mack Foundation

EIN 22-1710927 • New York, NY

19 East 88th Street Suite 1DNew York, NY 10128

Siviq Scores

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

0.00x

Higher debt load relative to assets than 62% of similar nonprofits.

<$500k nonprofits • Source year 2023

0.00x

Higher debt load relative to revenue than 64% of similar nonprofits.

<$500k nonprofits • Source year 2023

-16%

Higher net margin than 28% of similar nonprofits.

<$500k nonprofits • Source year 2023

Higher top officer pay than 84% of similar nonprofits.

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

<$500k nonprofits • Source year 2020

37%

Faster asset growth than 86% of similar nonprofits.

<$500k nonprofits • Annualized from 2022 to 2023

-31%

Faster revenue growth than 24% of similar nonprofits.

<$500k nonprofits • Annualized from 2022 to 2023

Balance Sheet

Liabilities / Assets62nd percentile

Assets

Down

$42,189

Down $2,238 (-5.0%) from 2023

Liabilities

Flat

Flat from 2023

Net Assets

Down

$42,189

Down $2,238 (-5.0%) from 2023

Operations

Liabilities / Revenue64th percentile Net Margin28th percentile

Revenue

Down

$838

Down $11,492 (-93%) from 2023

Expenses

Down

$8,576

Down $5,670 (-40%) from 2023

Net Income

Down

-$7,738

Down $5,822 (-304%) from 2023

Trend Graphs

Balance Sheet Trend

Asset Growth86th percentile

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

Highlighted filing

2024

Assets$42,189

Liabilities$0

Net Assets$42,189

Open 2024 Filing

Operations Trend

Revenue Growth24th percentile

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

Highlighted filing

2024

Revenue$838

Expenses$8,576

Net Income-$7,738

Open 2024 Filing

Filings

Most recent year

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

Open filing

Assets: $42,189
Liabilities: $0
Net assets: $42,189
Revenue: $838
Expenses: $8,576
Net income: -$7,738

	Balance Sheet			Operations
Year	Assets	Liabilities	Net Assets	Revenue	Expenses	Net Income
2024Detailed filing. Detailed filing data is available for this year.	$42.2	$0.00	$42.2	$0.84	$8.58	$7.74
2023Detailed filing. Detailed filing data is available for this year.	$44.4	$0.00	$44.4	$12.3	$14.2	$1.92
2022Detailed filing. Detailed filing data is available for this year.	$32.4	$0.00	$32.4	$18.0	$13.2	$4.84
2021Detailed filing. Detailed filing data is available for this year.	$29.0	$0.00	$29.0	$11.5	$16.9	$5.38
2020Detailed filing. Detailed filing data is available for this year.	$34.4	$0.00	$34.4	$21.5	$14.6	$6.85
2019Detailed filing. Detailed filing data is available for this year.	$27.5	$0.00	$27.5	$11.0	$8.50	$2.47
2018Detailed filing. Detailed filing data is available for this year.	$43.7	$0.00	$43.7	$6.00	$15.7	$9.70
2015Summary only. Only limited summary data is available for this year.	$55.3	$0.00		$17.6	$40.8	$23.3
2014Detailed filing. Detailed filing data is available for this year.	$78.6	$0.00	$78.6	$14.5	$10.0	$4.50
2013Detailed filing. Detailed filing data is available for this year.	$74.1	$0.00	$74.1	$0.09	$3.31	$3.40
2012Detailed filing. Detailed filing data is available for this year.	$77.5	$0.00	$77.5		$6.80
2011Detailed filing. Detailed filing data is available for this year.	$83.0	$0.00	$83.0		$4.28
2010Detailed filing. Detailed filing data is available for this year.	$82.0	$0.00	$82.0		$81.2

Latest Filing Detail

Jump To

Filing Snapshot

Filing Period: Jan 1, 2024 to Dec 31, 2024
Signed: Mar 19, 2025
Return Version: 2024v5.0

Compensation and Service Providers

Top Officer Pay84th percentile

Employees

Name	Title	Full / Part Time	Base	Other	Total
JEREMY MACK	President	PT	$0	-	-

Filing and Contact Details

Filer

Filer Name: Mack Foundation
EIN: 22-1710927
Phone: 2129872815
Address: 19 EAST 88TH STREET SUITE 1D, NEW YORK, NY 10128

Signing Officer

Name: Jeremy Mack
Title: CFO
Phone: 2129872815
Signed: 2025-03-19
Discuss with paid preparer: Yes

Preparer

Firm: Prager Metis Cpas LLC
Address: 100 SUNNYSIDE BLVD SUITE 200, WOODBURY, NY 11797
Preparer: Thomas Gallo
Phone: 5169218900

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IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientRelationshipTxt	0	NONE
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientRelationshipTxt	1	NONE
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientRelationshipTxt	2	NONE
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientRelationshipTxt	3	NONE
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientRelationshipTxt	4	NONE
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientRelationshipTxt	5	NONE
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientRelationshipTxt	6	NONE
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientRelationshipTxt	7	NONE
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/AddressLine1Txt	0	251 W 100 STREET
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/AddressLine1Txt	1	100 NICOLLS ROAD
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/AddressLine1Txt	2	9 ROUTE 39 SOUTH
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/AddressLine1Txt	3	1000 FIFTH AVENUE
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/AddressLine1Txt	4	163 PAPERMILL ROAD
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/AddressLine1Txt	5	PO BOX 611
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/AddressLine1Txt	6	PO BOX 40
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/AddressLine1Txt	7	99 GANESEVORT STREET
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/CityNm	0	NEW YORK
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/CityNm	1	STONY BROOK
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/CityNm	2	SHERMAN
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/CityNm	3	NEW YORK
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/CityNm	4	NEW MILFORD
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/CityNm	5	SHERMAN
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/CityNm	6	SHERMAN
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/CityNm	7	NEW YORK
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/StateAbbreviationCd	0	NY
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/StateAbbreviationCd	1	NY
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/StateAbbreviationCd	2	CT
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/StateAbbreviationCd	3	NY
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/StateAbbreviationCd	4	CT
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/StateAbbreviationCd	5	CT
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/StateAbbreviationCd	6	CT
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/StateAbbreviationCd	7	NY
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/ZIPCd	0	10025
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/ZIPCd	1	11790
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/ZIPCd	2	06784
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/ZIPCd	3	10028
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/ZIPCd	4	06776
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/ZIPCd	5	06784
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/ZIPCd	6	06784
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/ZIPCd	7	10014
IRS990PF/SupplementaryInformationGrp/TotalGrantOrContriApprvFutAmt	0	0
IRS990PF/SupplementaryInformationGrp/TotalGrantOrContriPdDurYrAmt	0	3663
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	171
IRS990PF/UndistributedIncomeGrp/AppliedToPriorYearsAmt	0	0
IRS990PF/UndistributedIncomeGrp/AppliedToYear1Amt	0	0
IRS990PF/UndistributedIncomeGrp/CorpusDistri170b1EOr4942g3Amt	0	0
IRS990PF/UndistributedIncomeGrp/DistributableAsAdjustedAmt	0	171
IRS990PF/UndistributedIncomeGrp/ExcessDistributionCyovAppCYAmt	0	0
IRS990PF/UndistributedIncomeGrp/ExcessDistributionCyovYr1Amt	0	11908
IRS990PF/UndistributedIncomeGrp/ExcessDistributionCyovYr2Amt	0	11111
IRS990PF/UndistributedIncomeGrp/ExcessDistributionCyovYr3Amt	0	9051
IRS990PF/UndistributedIncomeGrp/ExcessDistributionCyovYr4Amt	0	12147
IRS990PF/UndistributedIncomeGrp/ExcessDistributionCyovYr5Amt	0	6242
IRS990PF/UndistributedIncomeGrp/ExcessDistriCyovAppCYCorpusAmt	0	0
IRS990PF/UndistributedIncomeGrp/ExcessDistriCyovFromYr5Amt	0	6242
IRS990PF/UndistributedIncomeGrp/ExcessDistriCyovToNextYrAmt	0	47709
IRS990PF/UndistributedIncomeGrp/ExcessFromCurrentYearAmt	0	3492
IRS990PF/UndistributedIncomeGrp/ExcessFromYear1Amt	0	11908
IRS990PF/UndistributedIncomeGrp/ExcessFromYear2Amt	0	11111
IRS990PF/UndistributedIncomeGrp/ExcessFromYear3Amt	0	9051
IRS990PF/UndistributedIncomeGrp/ExcessFromYear4Amt	0	12147
IRS990PF/UndistributedIncomeGrp/PriorYearDeficiencyOrTaxAmt	0	0
IRS990PF/UndistributedIncomeGrp/PriorYearUndistributedIncmAmt	0	0
IRS990PF/UndistributedIncomeGrp/QualifyingDistributionsAmt	0	3663
IRS990PF/UndistributedIncomeGrp/RemainingDistriFromCorpusAmt	0	3492
IRS990PF/UndistributedIncomeGrp/Taxable1Amt	0	0
IRS990PF/UndistributedIncomeGrp/Taxable2Amt	0	0
IRS990PF/UndistributedIncomeGrp/TotalCorpusAmt	0	53951
IRS990PF/UndistributedIncomeGrp/TotalExcessDistributionCyovAmt	0	50459
IRS990PF/UndistributedIncomeGrp/TotalForPriorYearsAmt	0	0
IRS990PF/UndistributedIncomeGrp/TreatedAsDistriFromCorpusAmt	0	0
IRS990PF/UndistributedIncomeGrp/UndistributedIncomeCYAmt	0	0
IRS990PF/UndistributedIncomeGrp/UndistributedIncomePYAmt	0	0
OtherAssetsSchedule/OtherAssetsScheduleGrp/BOYBookValueAmt	0	43484
OtherAssetsSchedule/OtherAssetsScheduleGrp/Desc	0	INVESTMENTS
OtherAssetsSchedule/OtherAssetsScheduleGrp/EOYBookValueAmt	0	41780
OtherAssetsSchedule/OtherAssetsScheduleGrp/EOYFMVAmt	0	53964
OtherExpensesSchedule/OtherExpensesScheduleGrp/AdjustedNetIncomeAmt	0	0
OtherExpensesSchedule/OtherExpensesScheduleGrp/AdjustedNetIncomeAmt	1	0
OtherExpensesSchedule/OtherExpensesScheduleGrp/AdjustedNetIncomeAmt	2	0
OtherExpensesSchedule/OtherExpensesScheduleGrp/Desc	0	BANK CHARGES
OtherExpensesSchedule/OtherExpensesScheduleGrp/Desc	1	ADVISORY FEES & COSTS
OtherExpensesSchedule/OtherExpensesScheduleGrp/Desc	2	OTHER EXPENSES
OtherExpensesSchedule/OtherExpensesScheduleGrp/DisbursementsCharitablePrpsAmt	0	0
OtherExpensesSchedule/OtherExpensesScheduleGrp/DisbursementsCharitablePrpsAmt	1	0
OtherExpensesSchedule/OtherExpensesScheduleGrp/DisbursementsCharitablePrpsAmt	2	0
OtherExpensesSchedule/OtherExpensesScheduleGrp/NetInvestmentIncomeAmt	0	0
OtherExpensesSchedule/OtherExpensesScheduleGrp/NetInvestmentIncomeAmt	1	0
OtherExpensesSchedule/OtherExpensesScheduleGrp/NetInvestmentIncomeAmt	2	0
OtherExpensesSchedule/OtherExpensesScheduleGrp/RevenueAndExpensesPerBooksAmt	0	50
OtherExpensesSchedule/OtherExpensesScheduleGrp/RevenueAndExpensesPerBooksAmt	1	3554
OtherExpensesSchedule/OtherExpensesScheduleGrp/RevenueAndExpensesPerBooksAmt	2	121
OtherIncreasesSchedule/OtherIncreasesDetail/Amt	0	5500
OtherIncreasesSchedule/OtherIncreasesDetail/Desc	0	UNREALIZED APPRECIATION
ReturnHeader/BuildTS	0	2025-03-06 01:10:19Z
ReturnHeader/BusinessOfficerGrp/DiscussWithPaidPreparerInd	0	1
ReturnHeader/BusinessOfficerGrp/PersonNm	0	JEREMY MACK
ReturnHeader/BusinessOfficerGrp/PersonTitleTxt	0	CFO
ReturnHeader/BusinessOfficerGrp/PhoneNum	0	2129872815
ReturnHeader/BusinessOfficerGrp/SignatureDt	0	2025-03-19
ReturnHeader/Filer/BusinessName/BusinessNameLine1Txt	0	MACK FOUNDATION
ReturnHeader/Filer/BusinessNameControlTxt	0	MACK
ReturnHeader/Filer/EIN	0	221710927
ReturnHeader/Filer/PhoneNum	0	2129872815
ReturnHeader/Filer/USAddress/AddressLine1Txt	0	19 EAST 88TH STREET SUITE 1D
ReturnHeader/Filer/USAddress/CityNm	0	NEW YORK
ReturnHeader/Filer/USAddress/StateAbbreviationCd	0	NY
ReturnHeader/Filer/USAddress/ZIPCd	0	10128
ReturnHeader/IRSResponsiblePrtyInfoCurrInd	0	1
ReturnHeader/PreparerFirmGrp/PreparerFirmEIN	0	061667465
ReturnHeader/PreparerFirmGrp/PreparerFirmName/BusinessNameLine1Txt	0	PRAGER METIS CPAS LLC
ReturnHeader/PreparerFirmGrp/PreparerUSAddress/AddressLine1Txt	0	100 SUNNYSIDE BLVD SUITE 200
ReturnHeader/PreparerFirmGrp/PreparerUSAddress/CityNm	0	WOODBURY
ReturnHeader/PreparerFirmGrp/PreparerUSAddress/StateAbbreviationCd	0	NY
ReturnHeader/PreparerFirmGrp/PreparerUSAddress/ZIPCd	0	11797
ReturnHeader/PreparerPersonGrp/PhoneNum	0	5169218900
ReturnHeader/PreparerPersonGrp/PreparationDt	0	2025-03-19
ReturnHeader/PreparerPersonGrp/PreparerPersonNm	0	THOMAS GALLO
ReturnHeader/ReturnTs	0	2025-03-20T08:54:01-05:00
ReturnHeader/ReturnTypeCd	0	990PF
ReturnHeader/TaxPeriodBeginDt	0	2024-01-01
ReturnHeader/TaxPeriodEndDt	0	2024-12-31
ReturnHeader/TaxYr	0	2024

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