Civic Intelligence

Mammoth High School Booster Club

EIN 77-0529260 • 501(c)3 • Mammoth Lakes, CA

Profile

Support the educational athletic and cultural activities of Mammoth High School and its teachers administrators and students

PO Box 3149Mammoth Lakes, CA 93546

www.mhsboosters.org

Siviq Scores

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

Liabilities / Assets

60th percentile

0.00x

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

501(c)3 • <$500k nonprofits • Source year 2025

Liabilities / Revenue

62nd percentile

0.00x

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

501(c)3 • <$500k nonprofits • Source year 2025

Net Margin

83rd percentile

33%

Higher net margin than 83% of similar nonprofits.

501(c)3 • <$500k nonprofits • Source year 2025

Top Officer Pay

81st percentile

$0

Higher top officer pay than 81% of similar nonprofits.

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

501(c)3 • <$500k nonprofits • Source year 2025

Asset Growth

84th percentile

40%

Faster asset growth than 84% of similar nonprofits.

501(c)3 • <$500k nonprofits • Annualized from 2024 to 2025

Revenue Growth

33rd percentile

-21%

Faster revenue growth than 33% of similar nonprofits.

501(c)3 • <$500k nonprofits • Annualized from 2024 to 2025

Assets

Up

$280,768

Up $80,649 (+40%) from 2024

Liabilities

Flat

$0

Flat from 2024

Net Assets

Up

$280,768

Up $80,649 (+40%) from 2024

Revenue

Down

$247,364

Down $67,601 (-21%) from 2024

Expenses

Down

$166,270

Down $144,020 (-46%) from 2024

Net Income

Up

$81,094

Up $76,419 (+1635%) from 2024

Trend Graphs

Balance Sheet Trend

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

$300K$200K$100K$0Assets 2010: $51,706Net Assets 2010: $51,7062010Assets 2011: $50,195Net Assets 2011: $50,1952011Assets 2012: $60,299Net Assets 2012: $60,2992012Assets 2013: $76,483Liabilities 2013: $6,400Net Assets 2013: $70,0832013Assets 2014: $85,802Liabilities 2014: $23,523Net Assets 2014: $62,2792014Assets 2015: $100,348Liabilities 2015: $0Net Assets 2015: $100,3482015Assets 2016: $117,233Net Assets 2016: $117,2332016Assets 2017: $95,934Net Assets 2017: $95,9342017Assets 2018: $146,088Net Assets 2018: $146,0882018Assets 2019: $135,400Net Assets 2019: $135,4002019Assets 2020: $117,263Net Assets 2020: $117,2632020Assets 2021: $131,078Net Assets 2021: $131,0782021Assets 2022: $149,774Liabilities 2022: $0Net Assets 2022: $149,7742022Assets 2023: $195,444Liabilities 2023: $0Net Assets 2023: $195,4442023Assets 2024: $200,119Liabilities 2024: $0Net Assets 2024: $200,1192024Assets 2025: $280,768Liabilities 2025: $0Net Assets 2025: $280,7682025

Highlighted filing

2025

Assets$280,768
Liabilities$0
Net Assets$280,768

Operations Trend

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

$400K$300K$200K$100K$0-$100KRevenue 2010: $91,825Expenses 2010: $72,552Net Income 2010: $19,2732010Revenue 2011: $76,004Expenses 2011: $82,840Net Income 2011: -$6,8362011Revenue 2012: $53,209Expenses 2012: $43,105Net Income 2012: $10,1042012Revenue 2013: $137,081Expenses 2013: $127,297Net Income 2013: $9,7842013Revenue 2014: $134,677Expenses 2014: $141,286Net Income 2014: -$6,6092014Revenue 2015: $202,170Expenses 2015: $164,101Net Income 2015: $38,0692015Revenue 2016: $158,276Expenses 2016: $141,391Net Income 2016: $16,8852016Revenue 2017: $94,272Expenses 2017: $115,571Net Income 2017: -$21,2992017Revenue 2018: $173,303Expenses 2018: $123,149Net Income 2018: $50,1542018Revenue 2019: $171,539Expenses 2019: $182,227Net Income 2019: -$10,6882019Revenue 2020: $128,545Expenses 2020: $146,682Net Income 2020: -$18,1372020Revenue 2021: $135,153Expenses 2021: $121,338Net Income 2021: $13,8152021Revenue 2022: $258,893Expenses 2022: $240,197Net Income 2022: $18,6962022Revenue 2023: $333,463Expenses 2023: $287,793Net Income 2023: $45,6702023Revenue 2024: $314,965Expenses 2024: $310,290Net Income 2024: $4,6752024Revenue 2025: $247,364Expenses 2025: $166,270Net Income 2025: $81,0942025

Highlighted filing

2025

Revenue$247,364
Expenses$166,270
Net Income$81,094

Filings

Balance SheetOperations
YearAssetsLiabilitiesNet AssetsRevenueExpensesNet Income
2025Detailed filing. Detailed filing data is available for this year.$2.81$0.00$2.81$2.47$1.66$0.81
2024Detailed filing. Detailed filing data is available for this year.$2.00$0.00$2.00$3.15$3.10$0.05
2023Detailed filing. Detailed filing data is available for this year.$1.95$0.00$1.95$3.33$2.88$0.46
2022Detailed filing. Detailed filing data is available for this year.$1.50$0.00$1.50$2.59$2.40$0.19
2021Detailed filing. Detailed filing data is available for this year.$1.31$1.31$1.35$1.21$0.14
2020Detailed filing. Detailed filing data is available for this year.$1.17$1.17$1.29$1.47$0.18
2019Detailed filing. Detailed filing data is available for this year.$1.35$1.35$1.72$1.82$0.11
2018Detailed filing. Detailed filing data is available for this year.$1.46$1.46$1.73$1.23$0.50
2017Detailed filing. Detailed filing data is available for this year.$0.96$0.96$0.94$1.16$0.21
2016Detailed filing. Detailed filing data is available for this year.$1.17$1.17$1.58$1.41$0.17
2015Detailed filing. Detailed filing data is available for this year.$1.00$0.00$1.00$2.02$1.64$0.38
2014Detailed filing. Detailed filing data is available for this year.$0.86$0.24$0.62$1.35$1.41$0.07
2013Facts available. Structured filing facts are available, but richer extracted sections are limited.$0.76$0.06$0.70$1.37$1.27$0.10
2012Facts available. Structured filing facts are available, but richer extracted sections are limited.$0.60$0.60$0.53$0.43$0.10
2011Facts available. Structured filing facts are available, but richer extracted sections are limited.$0.50$0.50$0.76$0.83$0.07
2010Facts available. Structured filing facts are available, but richer extracted sections are limited.$0.52$0.52$0.92$0.73$0.19
Latest Filing Detail
Jump To
Filing Snapshot
Filing Period
Aug 1, 2024 to Jul 31, 2025
Signed
Dec 1, 2025
Return Version
2024v5.0
Gross Receipts
$247,364
Mission and Program Overview

Mission

Support the educational, athletic, and cultural activities of mammoth high school and its teachers, administrators and students.

MHS Boosters is a non-profit, all volunteer, parent-teacher-community organization. Our mission is to: Assist Mammoth High School by fostering cooperation and communication between parents, staff, students and the public, and to promote success in academics, athletics, and the arts.

Balance Sheet Detail
LineBeginningEndChange
Assets
Cash and Non-Interest-Bearing Accounts$199,674$150,771▼ $48,903
Savings and Temporary Cash Investments-$129,997-
Loans From Officers Directors$0$0→ $0
Total Assets$199,674$280,768▲ $81,094
Liabilities
Accounts Payable and Accrued Expenses$0$0→ $0
Grants Payable$0$0→ $0
Mortgage Notes Payable Secured by Investment Property$0$0→ $0
Unsecured Notes Loans Payable$0$0→ $0
Other Liabilities$0--
Deferred Revenue$0$0→ $0
Escrow Account Liability$0$0→ $0
Tax Exempt Bond Liabilities$0$0→ $0
Total Liabilities$0$0→ $0
Net Assets / Fund Balance
Net Assets With Donor Restrictions$199,674$280,768▲ $81,094
Net Assets Without Donor Restrictions$0$0→ $0
Total Net Assets Fund Balance$199,674$280,768▲ $81,094
Total Liabilities and Net Assets / Fund Balance$199,674$280,768▲ $81,094
Compensation and Service Providers

Board Members and Trustees

NameTitle
Romi SkolnikPresident
Susan PetroniVice President
Sheilah BrodeBanners Coordinator
Mary Beth EricsonMedia: Coordinator
Antonette CiccarelliMembership Coordinator
Cathy DalrympleSecretary
Marcy CastroSecretary
Christine GramlichTreasurer
Erick SugimuraTreasurer
Revenue and Support

Revenue Composition

Contributions and Grants
$238,517
Program Service Revenue
$0
Investment Income
$4,997
Other Revenue
$3,850
All Other Contributions
$16,260
Change in Net Assets
$81,094
Expenses and Functional Allocation

Major Expense Lines

Line ItemAmount
Other Expenses$166,270
Grants and Similar Amounts Paid$0
Professional Fundraising Fees$0
Salaries, Compensation, and Employee Benefits$0
Total Fundraising Expense$0

Functional Expense Allocation

Line ItemProgramManagementFundraisingTotal
Other Expenses$46,656$0$0$46,656
Information Technology$0$747$0$747
Office Expenses$0$226$0$226
Insurance$0$206$0$206
Fees for Services Management$0$191$0$191
Fees for Services Other$0$105$0$105
Total Functional Expenses$164,795$1,475$0$166,270
Fundraising, Events, and Gaming
Fundraising activities
Yes
Gaming activities
No
Professional fundraiser used
No

Fundraising and Gaming Totals

Line ItemAmount
Gaming Gross Income$3,850
Fundraising Direct Expenses$0
Fundraising Gross Income$0
Gaming Direct Expenses$0
Professional Fundraising Fees$0

Fundraising Events

EventGross ReceiptsGross RevenueDirect ExpensesNet Income
Huskyfest 2024 Golf Tournament$82,621$82,621$4,127$78,494
Banner Sales 2024$21,971$21,971$820$21,151
Total Events$157,209$157,209$46,581$110,628
Political and Lobbying Activity
Political campaign activity
No
Lobbying activity
No
Subject to proxy tax
No
Insider Transactions and Loans

Loans and Receivables

Line ItemBeginningEndChange
Loans from Officers, Directors, Trustees, and Key Employees$0$0→ $0
Governance and Compliance

Governance Checklist

Compiled or reviewed by an accountant
No
Backup withholding compliance
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
No
Other officer compensation reviewed
No
Conflict-of-interest policy
No
Audited financial statements prepared
No
Key decisions subject to board approval
Yes
Management duties delegated
No

Governance Explanations

Form 990, Part VI, Section A, Line 6

All parents, students, teachers and administrators, alumni and community supporters of Mammoth High School may become members of this organization.

Form 990, Part VI, Section A, Line 7A

All paid members in attendance at the last general meeting of the year vote to elect the new board members.

Form 990, Part VI, Section A, Line 7B

All paid members in attendance at the first general meeting of the year vote to approve the budget for the new fiscal year/school year.

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

All executive board members were emailed a copy of the return for review.

Form 990, Part VI, Section C, Line 19

By-Laws, tax documents, and other organization documents are available on the organization's website.

Filing and Contact Details

Filer

Filer Name
Mammoth High School Booster Club
EIN
77-0529260
Phone
7609348541
Address
PO Box 3149, Mammoth Lakes, CA 93546

Signing Officer

Name
Christine Gramlich
Title
Treasurer
Phone
7609142074
Signed
2025-12-01

Organization Details

Principal Officer
Christine Gramlich
Formed
2001
Legal Domicile
CA
Voting Board Members
10
Independent Board Members
10
Employees
0
Volunteers
20
Raw XML AppendixShowing 400 of 581 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/Form990PartVIISectionAGrp/TitleTxt3Treasurer
IRS990/Form990PartVIISectionAGrp/TitleTxt4Secretary
IRS990/Form990PartVIISectionAGrp/TitleTxt5Secretary
IRS990/Form990PartVIISectionAGrp/TitleTxt6Membership Coordinator
IRS990/Form990PartVIISectionAGrp/TitleTxt7Banners Coordinator
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IRS990/InformationTechnologyGrp/TotalAmt0747
IRS990/InsuranceGrp/FundraisingAmt00
IRS990/InsuranceGrp/ManagementAndGeneralAmt0206
IRS990/InsuranceGrp/ProgramServicesAmt00
IRS990/InsuranceGrp/TotalAmt0206
IRS990/InterestGrp/FundraisingAmt00
IRS990/InterestGrp/ManagementAndGeneralAmt00
IRS990/InterestGrp/ProgramServicesAmt00
IRS990/InterestGrp/TotalAmt00
IRS990/InvestmentExpenseAmt00
IRS990/InvestmentIncomeGrp/ExclusionAmt00
IRS990/InvestmentIncomeGrp/RelatedOrExemptFuncIncomeAmt04997
IRS990/InvestmentIncomeGrp/TotalRevenueColumnAmt04997
IRS990/InvestmentIncomeGrp/UnrelatedBusinessRevenueAmt00
IRS990/InvestmentInJointVentureInd00
IRS990/IRPDocumentCnt00
IRS990/IRPDocumentW2GCnt00
IRS990/LegalDomicileStateCd0CA
IRS990/LoanOutstandingInd00
IRS990/LoansFromOfficersDirectorsGrp/BOYAmt00
IRS990/LoansFromOfficersDirectorsGrp/EOYAmt00
IRS990/LobbyingActivitiesInd00
IRS990/LocalChaptersInd00
IRS990/MaterialDiversionOrMisuseInd00
IRS990/MembershipDuesAmt04300
IRS990/MembersOrStockholdersInd01
IRS990/MethodOfAccountingCashInd0X
IRS990/MinutesOfCommitteesInd01
IRS990/MinutesOfGoverningBodyInd01
IRS990/MissionDesc0MHS Boosters is a non-profit, all volunteer, parent-teacher-community organization. Our mission is to: Assist Mammoth High School by fostering cooperation and communication between parents, staff, students and the public, and to promote success in academics, athletics, and the arts.
IRS990/MoreThan5000KToIndividualsInd00
IRS990/MoreThan5000KToOrgInd00
IRS990/MortgNotesPyblScrdInvstPropGrp/BOYAmt00
IRS990/MortgNotesPyblScrdInvstPropGrp/EOYAmt00
IRS990/NetAssetsOrFundBalancesBOYAmt0199674
IRS990/NetAssetsOrFundBalancesEOYAmt0280768
IRS990/NetIncmFromFundraisingEvtGrp/ExclusionAmt00
IRS990/NetIncmFromFundraisingEvtGrp/TotalRevenueColumnAmt00
IRS990/NetIncmFromFundraisingEvtGrp/UnrelatedBusinessRevenueAmt00
IRS990/NetIncomeFromGamingGrp/ExclusionAmt00
IRS990/NetIncomeFromGamingGrp/RelatedOrExemptFuncIncomeAmt03850
IRS990/NetIncomeFromGamingGrp/TotalRevenueColumnAmt03850
IRS990/NetIncomeFromGamingGrp/UnrelatedBusinessRevenueAmt00
IRS990/NetUnrelatedBusTxblIncmAmt00
IRS990/NetUnrlzdGainsLossesInvstAmt00
IRS990/NoDonorRestrictionNetAssetsGrp/BOYAmt00
IRS990/NoDonorRestrictionNetAssetsGrp/EOYAmt00
IRS990/NoListedPersonsCompensatedInd0X
IRS990/NoncashContributionsAmt00
IRS990/NondeductibleContributionsInd00
IRS990/OccupancyGrp/FundraisingAmt00
IRS990/OccupancyGrp/ManagementAndGeneralAmt00
IRS990/OccupancyGrp/ProgramServicesAmt00
IRS990/OccupancyGrp/TotalAmt00
IRS990/OfficeExpensesGrp/FundraisingAmt00
IRS990/OfficeExpensesGrp/ManagementAndGeneralAmt0226
IRS990/OfficeExpensesGrp/ProgramServicesAmt00
IRS990/OfficeExpensesGrp/TotalAmt0226
IRS990/OfficerMailingAddressInd00
IRS990/OperateHospitalInd00
IRS990/Organization501c3Ind0X
IRS990/OrganizationFollowsFASB117Ind0X
IRS990/OtherChangesInNetAssetsAmt00
IRS990/OtherEmployeeBenefitsGrp/FundraisingAmt00
IRS990/OtherEmployeeBenefitsGrp/ManagementAndGeneralAmt00
IRS990/OtherEmployeeBenefitsGrp/ProgramServicesAmt00
IRS990/OtherEmployeeBenefitsGrp/TotalAmt00
IRS990/OtherExpensesGrp/Desc0Athletic Program Support FY24-25
IRS990/OtherExpensesGrp/Desc1Academic Program Support FY24-25
IRS990/OtherExpensesGrp/Desc2Student Support FY24-25
IRS990/OtherExpensesGrp/FundraisingAmt00
IRS990/OtherExpensesGrp/FundraisingAmt10
IRS990/OtherExpensesGrp/FundraisingAmt20
IRS990/OtherExpensesGrp/ManagementAndGeneralAmt00
IRS990/OtherExpensesGrp/ManagementAndGeneralAmt10
IRS990/OtherExpensesGrp/ManagementAndGeneralAmt20
IRS990/OtherExpensesGrp/ProgramServicesAmt0104366
IRS990/OtherExpensesGrp/ProgramServicesAmt113773
IRS990/OtherExpensesGrp/ProgramServicesAmt246656
IRS990/OtherExpensesGrp/TotalAmt0104366
IRS990/OtherExpensesGrp/TotalAmt113773
IRS990/OtherExpensesGrp/TotalAmt246656
IRS990/OtherLiabilitiesGrp/BOYAmt00
IRS990/OtherRevenueTotalAmt00
IRS990/OtherSalariesAndWagesGrp/FundraisingAmt00
IRS990/OtherSalariesAndWagesGrp/ManagementAndGeneralAmt00
IRS990/OtherSalariesAndWagesGrp/ProgramServicesAmt00
IRS990/OtherSalariesAndWagesGrp/TotalAmt00
IRS990/OwnWebsiteInd0X
IRS990/PartialLiquidationInd00
IRS990/PaymentsToAffiliatesGrp/FundraisingAmt00
IRS990/PaymentsToAffiliatesGrp/ManagementAndGeneralAmt00
IRS990/PaymentsToAffiliatesGrp/ProgramServicesAmt00
IRS990/PaymentsToAffiliatesGrp/TotalAmt00
IRS990/PayrollTaxesGrp/FundraisingAmt00
IRS990/PayrollTaxesGrp/ManagementAndGeneralAmt00
IRS990/PayrollTaxesGrp/ProgramServicesAmt00
IRS990/PayrollTaxesGrp/TotalAmt00
IRS990/PensionPlanContributionsGrp/FundraisingAmt00
IRS990/PensionPlanContributionsGrp/ManagementAndGeneralAmt00
IRS990/PensionPlanContributionsGrp/ProgramServicesAmt00
IRS990/PensionPlanContributionsGrp/TotalAmt00
IRS990/PoliticalCampaignActyInd00
IRS990/PrincipalOfficerNm0Christine Gramlich
IRS990/PriorPeriodAdjustmentsAmt00
IRS990/ProfessionalFundraisingInd00
IRS990/ProgSrvcAccomActy2Grp/Desc0Academic Program Support includes Art Music, student clubs, academic and teacher requests, and teacher appreciation.
IRS990/ProgSrvcAccomActy2Grp/ExpenseAmt013773
IRS990/ProgSrvcAccomActy2Grp/GrantAmt00
IRS990/ProgSrvcAccomActy2Grp/RevenueAmt00
IRS990/ProgSrvcAccomActy3Grp/Desc0Student Support includes senior class event expenses, student awards and scholarships.
IRS990/ProgSrvcAccomActy3Grp/ExpenseAmt046656
IRS990/ProgSrvcAccomActy3Grp/GrantAmt00
IRS990/ProgSrvcAccomActy3Grp/RevenueAmt00
IRS990/ProhibitedTaxShelterTransInd00
IRS990/PYBenefitsPaidToMembersAmt00
IRS990/PYContributionsGrantsAmt0310447
IRS990/PYExcessBenefitTransInd00
IRS990/PYGrantsAndSimilarPaidAmt00
IRS990/PYInvestmentIncomeAmt02
IRS990/PymtTravelEntrtnmntPubOfclGrp/FundraisingAmt00
IRS990/PymtTravelEntrtnmntPubOfclGrp/ManagementAndGeneralAmt00
IRS990/PymtTravelEntrtnmntPubOfclGrp/ProgramServicesAmt00
IRS990/PymtTravelEntrtnmntPubOfclGrp/TotalAmt00
IRS990/PYOtherExpensesAmt0310290
IRS990/PYOtherRevenueAmt04516
IRS990/PYProgramServiceRevenueAmt00
IRS990/PYRevenuesLessExpensesAmt04675
IRS990/PYSalariesCompEmpBnftPaidAmt00
IRS990/PYTotalExpensesAmt0310290
IRS990/PYTotalProfFndrsngExpnsAmt00
IRS990/PYTotalRevenueAmt0314965
IRS990/ReconcilationRevenueExpnssAmt081094
IRS990/RelatedEntityInd00
IRS990/RelatedOrganizationCtrlEntInd00
IRS990/RelatedOrganizationsAmt00
IRS990/RentalIncomeOrLossGrp/PersonalAmt00
IRS990/RentalIncomeOrLossGrp/RealAmt00
IRS990/ReportInvestmentsOtherSecInd00
IRS990/ReportLandBuildingEquipmentInd00
IRS990/ReportOtherAssetsInd00
IRS990/ReportOtherLiabilitiesInd00
IRS990/ReportProgramRelatedInvstInd00
IRS990/RevenueAmt00
IRS990/RoyaltiesGrp/FundraisingAmt00
IRS990/RoyaltiesGrp/ManagementAndGeneralAmt00
IRS990/RoyaltiesGrp/ProgramServicesAmt00
IRS990/RoyaltiesGrp/TotalAmt00
IRS990/RoyaltiesRevenueGrp/ExclusionAmt00
IRS990/RoyaltiesRevenueGrp/RelatedOrExemptFuncIncomeAmt00
IRS990/RoyaltiesRevenueGrp/TotalRevenueColumnAmt00
IRS990/RoyaltiesRevenueGrp/UnrelatedBusinessRevenueAmt00
IRS990/SavingsAndTempCashInvstGrp/EOYAmt0129997
IRS990ScheduleA/AmountsRcvdDsqlfyPersonGrp/CurrentTaxYearMinus1YearAmt00
IRS990ScheduleA/AmountsRcvdDsqlfyPersonGrp/CurrentTaxYearMinus2YearsAmt00
IRS990ScheduleA/AmountsRcvdDsqlfyPersonGrp/CurrentTaxYearMinus3YearsAmt00
IRS990ScheduleA/AmountsRcvdDsqlfyPersonGrp/CurrentTaxYearMinus4YearsAmt00
IRS990ScheduleA/AmountsRcvdDsqlfyPersonGrp/TotalAmt00
IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/CurrentTaxYearAmt0248974
IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/CurrentTaxYearMinus1YearAmt0166133
IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/CurrentTaxYearMinus2YearsAmt0204526
IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/CurrentTaxYearMinus3YearsAmt0167240
IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/CurrentTaxYearMinus4YearsAmt031264
IRS990ScheduleA/GiftsGrantsContrisRcvd509Grp/TotalAmt0818137
IRS990ScheduleA/GovtFurnSrvcFcltsVl509Grp/CurrentTaxYearMinus1YearAmt00
IRS990ScheduleA/GovtFurnSrvcFcltsVl509Grp/CurrentTaxYearMinus2YearsAmt00

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