Civic Intelligence

Gustavus and Louise Pfeiffer Research

EIN 13-6086299 • Wilmington, DE

Foundation Source 501 Silverside RdWilmington, DE 19809-1377
Siviq Scores

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

Liabilities / Assets

29th percentile

0.01x

Higher debt load relative to assets than 29% of similar nonprofits.

$10M-$25M nonprofits • Source year 2024

Liabilities / Revenue

39th percentile

0.07x

Higher debt load relative to revenue than 39% of similar nonprofits.

$10M-$25M nonprofits • Source year 2024

Net Margin

85th percentile

48%

Higher net margin than 85% of similar nonprofits.

$10M-$25M nonprofits • Source year 2024

Top Officer Pay

26th percentile

$7,200

Higher top officer pay than 26% of similar nonprofits.

Top officer pay equals 0.4% of source-year revenue.

$10M-$25M nonprofits • Source year 2024

Asset Growth

69th percentile

9.8%

Faster asset growth than 69% of similar nonprofits.

$10M-$25M nonprofits • Annualized from 2023 to 2024

Revenue Growth

85th percentile

77%

Faster revenue growth than 85% of similar nonprofits.

$10M-$25M nonprofits • Annualized from 2023 to 2024

Balance Sheet
Liabilities / Assets29th percentile

Assets

Up

$19,610,601

Up $1,747,096 (+9.8%) from 2023

Liabilities

Up

$121,148

Up $24,280 (+25%) from 2023

Net Assets

Up

$19,489,453

Up $1,722,816 (+9.7%) from 2023

Operations
Liabilities / Revenue39th percentileNet Margin85th percentile

Revenue

Up

$1,647,953

Up $714,310 (+77%) from 2023

Expenses

Up

$849,467

Up $661,304 (+351%) from 2023

Net Income

Up

$798,486

Up $53,006 (+7.1%) from 2023

Trend Graphs

Balance Sheet Trend

Asset Growth69th percentile

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

$30M$20M$10M$0Assets 2011: $21,135,551Liabilities 2011: $301,7782011Assets 2012: $23,116,316Liabilities 2012: $349,9772012Assets 2013: $26,568,174Liabilities 2013: $33,4312013Assets 2014: $28,142,814Liabilities 2014: $5,442,559Net Assets 2014: $22,700,2552014Assets 2015: $24,513,142Liabilities 2015: $2,338,985Net Assets 2015: $22,174,1572015Assets 2019: $22,129,055Liabilities 2019: $2,528,8582019Assets 2020: $21,798,051Liabilities 2020: $2,283,250Net Assets 2020: $19,514,8012020Assets 2021: $19,275,018Liabilities 2021: $1,336,306Net Assets 2021: $17,938,7122021Assets 2022: $15,514,522Liabilities 2022: $976,389Net Assets 2022: $14,538,1332022Assets 2023: $17,863,505Liabilities 2023: $96,868Net Assets 2023: $17,766,6372023Assets 2024: $19,610,601Liabilities 2024: $121,148Net Assets 2024: $19,489,4532024

Highlighted filing

2024

Assets$19,610,601
Liabilities$121,148
Net Assets$19,489,453
Open 2024 Filing

Operations Trend

Revenue Growth85th percentile

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

$10M$5.0M$0-$5.0M-$10MRevenue 2011: $736,655Expenses 2011: $672,919Net Income 2011: $63,7362011Revenue 2012: $788,052Expenses 2012: $585,153Net Income 2012: $202,8992012Revenue 2013: $1,173,620Expenses 2013: $518,486Net Income 2013: $655,1342013Revenue 2014: $1,413,327Expenses 2014: $6,449,374Net Income 2014: -$5,036,0472014Revenue 2015: $2,106,760Expenses 2015: $554,564Net Income 2015: $1,552,1962015Revenue 2019: $2,099,996Expenses 2019: $5,217,835Net Income 2019: -$3,117,8392019Revenue 2020: $2,292,341Expenses 2020: $2,609,989Net Income 2020: -$317,6482020Revenue 2021: $3,508,351Expenses 2021: $4,671,757Net Income 2021: -$1,163,4062021Revenue 2022: $1,247,468Expenses 2022: $596,765Net Income 2022: $650,7032022Revenue 2023: $933,643Expenses 2023: $188,163Net Income 2023: $745,4802023Revenue 2024: $1,647,953Expenses 2024: $849,467Net Income 2024: $798,4862024

Highlighted filing

2024

Revenue$1,647,953
Expenses$849,467
Net Income$798,486
Open 2024 Filing

Filings

Most recent year

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

Open filing
Assets
$19,610,601
Liabilities
$121,148
Net assets
$19,489,453
Revenue
$1,647,953
Expenses
$849,467
Net income
$798,486
Balance SheetOperations
YearAssetsLiabilitiesNet AssetsRevenueExpensesNet Income
2024Detailed filing. Detailed filing data is available for this year.$19.6$0.12$19.5$1.65$0.85$0.80
2023Detailed filing. Detailed filing data is available for this year.$17.9$0.10$17.8$0.93$0.19$0.75
2022Detailed filing. Detailed filing data is available for this year.$15.5$0.98$14.5$1.25$0.60$0.65
2021Detailed filing. Detailed filing data is available for this year.$19.3$1.34$17.9$3.51$4.67$1.16
2020Detailed filing. Detailed filing data is available for this year.$21.8$2.28$19.5$2.29$2.61$0.32
2019Summary only. Only limited summary data is available for this year.$22.1$2.53$2.10$5.22$3.12
2015Detailed filing. Detailed filing data is available for this year.$24.5$2.34$22.2$2.11$0.55$1.55
2014Detailed filing. Detailed filing data is available for this year.$28.1$5.44$22.7$1.41$6.45$5.04
2013Summary only. Only limited summary data is available for this year.$26.6$0.03$1.17$0.52$0.66
2012Summary only. Only limited summary data is available for this year.$23.1$0.35$0.79$0.59$0.20
2011Summary only. Only limited summary data is available for this year.$21.1$0.30$0.74$0.67$0.06
Latest Filing Detail
Jump To
Filing Snapshot
Filing Period
Jan 1, 2024 to Dec 31, 2024
Signed
Oct 13, 2025
Return Version
2024v5.2
Compensation and Service Providers
Top Officer Pay26th percentile

Employees

NameTitleFull / Part TimeBaseOtherTotal
Lise P ChapmanDir, Pres-$7,200-$7,200
Patricia R HeroldDir, As Sec, As Treas-$7,200-$7,200
Matthew Mayro KeeneyDir, VP-$7,200-$7,200
Sarah SP McCarthyDir, Sec, Treas-$7,200-$7,200
Kimberly Herold AlvarezDirector-$5,200-$5,200
Filing and Contact Details

Filer

Filer Name
Gustavus and Louise Pfeiffer Research
EIN
13-6086299
In Care Of
% Foundation Source
Phone
8008391754
Address
Foundation Source 501 Silverside Rd, Wilmington, DE 19809-1377

Signing Officer

Name
Sarah SP McCarthy
Title
Secretary
Phone
8008391754
Signed
2025-10-13
Discuss with paid preparer
Yes

Preparer

Firm
Foundation Source
Address
3333 New Hyde Park Rd Ste 406, New Hyde Park, NY 11042
Preparer
Jeffrey D Haskell
Phone
8008391754
Raw XML Appendix343 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/Amt2150000
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/GrantOrContributionPurposeTxt0To name the Imaging Core located in Room 332 as the "H. Robert Herold II Imaging Core"
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/GrantOrContributionPurposeTxt1General & Unrestricted
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/GrantOrContributionPurposeTxt2Milton C. Rose Research Scholars
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientBusinessName/BusinessNameLine1Txt0HUNTINGTON MEDICAL RESEARCH INSTITUTES
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientBusinessName/BusinessNameLine1Txt1OLD MILL FOUNDATION
IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientBusinessName/BusinessNameLine1Txt2PFEIFFER UNIVERSITY
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IRS990PF/SupplementaryInformationGrp/GrantOrContributionPdDurYrGrp/RecipientUSAddress/AddressLine1Txt11120 OLD MILL RD
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IRS990PF/UndistributedIncomeGrp/ExcessDistriCyovAppCYCorpusAmt0123886
IRS990PF/UndistributedIncomeGrp/ExcessDistriCyovFromYr5Amt01577194
IRS990PF/UndistributedIncomeGrp/ExcessDistriCyovToNextYrAmt06556934
IRS990PF/UndistributedIncomeGrp/ExcessFromYear2Amt086170
IRS990PF/UndistributedIncomeGrp/ExcessFromYear3Amt04663416
IRS990PF/UndistributedIncomeGrp/ExcessFromYear4Amt01807348
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LegalFeesSchedule/LegalFeesGrp/CategoryTxt0General Consultations
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OtherExpensesSchedule/OtherExpensesScheduleGrp/Desc4Storage Fee
OtherExpensesSchedule/OtherExpensesScheduleGrp/Desc5WEBSITE HOSTING/SUPPORT
OtherExpensesSchedule/OtherExpensesScheduleGrp/DisbursementsCharitablePrpsAmt069458
OtherExpensesSchedule/OtherExpensesScheduleGrp/DisbursementsCharitablePrpsAmt1510
OtherExpensesSchedule/OtherExpensesScheduleGrp/DisbursementsCharitablePrpsAmt2452
OtherExpensesSchedule/OtherExpensesScheduleGrp/DisbursementsCharitablePrpsAmt350
OtherExpensesSchedule/OtherExpensesScheduleGrp/DisbursementsCharitablePrpsAmt4420
OtherExpensesSchedule/OtherExpensesScheduleGrp/NetInvestmentIncomeAmt0616
OtherExpensesSchedule/OtherExpensesScheduleGrp/RevenueAndExpensesPerBooksAmt069876
OtherExpensesSchedule/OtherExpensesScheduleGrp/RevenueAndExpensesPerBooksAmt14106
OtherExpensesSchedule/OtherExpensesScheduleGrp/RevenueAndExpensesPerBooksAmt2452
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OtherExpensesSchedule/OtherExpensesScheduleGrp/RevenueAndExpensesPerBooksAmt4840
OtherExpensesSchedule/OtherExpensesScheduleGrp/RevenueAndExpensesPerBooksAmt5143
OtherIncreasesSchedule/OtherIncreasesDetail/Amt0924330
OtherIncreasesSchedule/OtherIncreasesDetail/Desc0UNREALIZED GAINS ON INVESTMENTS
TaxesSchedule/TaxesDetail/Amt023000
TaxesSchedule/TaxesDetail/Amt113000
TaxesSchedule/TaxesDetail/CategoryTxt0990-PF TAX FOR 2024
TaxesSchedule/TaxesDetail/CategoryTxt1INCREASE DEFERRED EXCISE TAX
ReturnHeader/BuildTS02025-03-06 01:10:19Z
ReturnHeader/BusinessOfficerGrp/DiscussWithPaidPreparerInd0true
ReturnHeader/BusinessOfficerGrp/PersonNm0Sarah SP McCarthy
ReturnHeader/BusinessOfficerGrp/PersonTitleTxt0Secretary
ReturnHeader/BusinessOfficerGrp/PhoneNum08008391754
ReturnHeader/BusinessOfficerGrp/SignatureDt02025-10-13
ReturnHeader/Filer/BusinessName/BusinessNameLine1Txt0Gustavus and Louise Pfeiffer Research
ReturnHeader/Filer/BusinessName/BusinessNameLine2Txt0Foundation
ReturnHeader/Filer/BusinessNameControlTxt0GUST
ReturnHeader/Filer/EIN0136086299
ReturnHeader/Filer/InCareOfNm0% Foundation Source
ReturnHeader/Filer/PhoneNum08008391754
ReturnHeader/Filer/USAddress/AddressLine1Txt0Foundation Source 501 Silverside Rd
ReturnHeader/Filer/USAddress/CityNm0Wilmington
ReturnHeader/Filer/USAddress/StateAbbreviationCd0DE
ReturnHeader/Filer/USAddress/ZIPCd0198091377
ReturnHeader/IRSResponsiblePrtyInfoCurrInd0true
ReturnHeader/PreparerFirmGrp/PreparerFirmName/BusinessNameLine1Txt0Foundation Source
ReturnHeader/PreparerFirmGrp/PreparerUSAddress/AddressLine1Txt03333 New Hyde Park Rd Ste 406
ReturnHeader/PreparerFirmGrp/PreparerUSAddress/CityNm0New Hyde Park
ReturnHeader/PreparerFirmGrp/PreparerUSAddress/StateAbbreviationCd0NY
ReturnHeader/PreparerFirmGrp/PreparerUSAddress/ZIPCd011042
ReturnHeader/PreparerPersonGrp/PhoneNum08008391754
ReturnHeader/PreparerPersonGrp/PreparerPersonNm0Jeffrey D Haskell
ReturnHeader/ReturnTs02025-10-23T06:38:24-05:00
ReturnHeader/ReturnTypeCd0990PF
ReturnHeader/TaxPeriodBeginDt02024-01-01
ReturnHeader/TaxPeriodEndDt02024-12-31
ReturnHeader/TaxYr02024

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