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Nonprofit · EIN 75-0827460

ST MARKS SCHOOL OF TEXAS

Tax-exempt · DALLAS, TX 75230

Financials

$66.6M$45.8M2022$55.6M$48.4M2023$46.4M$51.7M2024
Revenue Expenses · by fiscal year end
Financials of ST MARKS SCHOOL OF TEXAS by year, from its e-filed returns
Year endedFormRevenueExpensesNet incomeTotal assetsLiabilitiesNet assets
June 30, 2025990$46,400,356$51,680,080-$5,279,724$420,229,863$41,741,195$378,488,668
June 30, 2024990$55,629,895$48,368,309$7,261,586$401,975,830$43,274,879$358,700,951
June 30, 2023990$66,581,417$45,822,973$20,758,444$366,637,193$37,674,667$328,962,526
Financial details: 990 for the year ended June 30, 2025

Revenue

Contributions, gifts and grants
$8,366,333
Program service revenue
$33,922,622
Investment income
$4,094,491
Net gain from sales of assets
-$241,238
Net income from fundraising events
$21,995
Net income from gaming
-$30,500
Net income from sales of inventory
-$55,178
Other revenue
$16,910

Expenses

Grants and similar amounts paid
$4,140,687
Compensation of officers, directors and key employees
$2,467,931
Other salaries and wages
$20,792,796
Salaries, compensation and benefits (total)
$28,148,670
Professional fundraising fees
$55,900
Accounting fees
$94,310
Occupancy
$1,806,615
Travel
$469,581
Depreciation
$5,992,105
Program services (functional)
$43,145,789
Management and general (functional)
$6,307,760
Fundraising (functional)
$2,226,531

Balance sheet and other

Total assets, start of year
$401,975,830
Total assets, end of year
$420,229,863
Total liabilities, end of year
$41,741,195
Net assets, end of year
$378,488,668
Land, buildings and equipment
$136,210,580
Publicly traded securities
$153,468,053
Net assets without donor restrictions
$153,089,805
Net assets with donor restrictions
$225,398,863
Gross unrelated business income
$44,055
Gross receipts
$67,721,720
Employees
321
Volunteers
500
Year formed
1934
State of legal domicile
TX

From the e-filed returns the IRS publishes as XML (latest three processing years; amended returns replace the original). PDF copies at the IRS.

Officers, directors and key employees

As listed on the 990 for the year ended June 30, 2025, highest compensation first.

NameTitleHours / weekCompensationOther / benefits
DAVID DINIHEADMASTER
Officer
40$1,012,043$42,255
JOHN ASHTONASSOCIATE HEADMASTER
Key employee
40$496,371$41,416
SUZANNE TOWNSENDCHIEF FINANCIAL OFFICER
Officer
40$359,559$38,263
JOHN S JOLLYASST. HEADMASTER FOR EXTER
Key employee
40$324,218$34,760
TIMOTHY CROUCHDIRECTOR OF DEVELOPMENT
Highest-paid employee
40$207,928$32,334
DEAN CLAYMANHEAD OF MIDDLE SCHOOL
Highest-paid employee
40$201,266$25,649
JAMES E WINDLINGER JRCONTROLLER
Highest-paid employee
40$195,344$25,995
MARK WEBBDIRECTOR OF PHYSICAL PLANT
Highest-paid employee
40$191,679$25,920
THOMAS ECKELCHIEF TECHNOLOGY OFFICER
Highest-paid employee
40$186,921$19,831
DAVID B ACKERMANTRUSTEE
Trustee or director
2$0$0
LYDIA B ADDYSECRETARY
Trustee or director, Officer
2$0$0
CYNTHIA C BROWNTRUSTEE
Trustee or director
2$0$0
MARWIN T BROWNTRUSTEE
Trustee or director
2$0$0
DAVID A CAMPBELLTRUSTEE
Trustee or director
2$0$0
NANCY P CARLSONTRUSTEE
Trustee or director
2$0$0
45 more people on this return
NameTitleHours / weekCompensation
ROY A CHOITRUSTEE
Trustee or director
2$0
ERIC A CLARKTRUSTEE
Trustee or director
2$0
TONIKA CHEEK CLAYTONTRUSTEE
Trustee or director
2$0
KATHERINE R CROWTRUSTEE
Trustee or director
2$0
CHANDRA DHANDAPANITRUSTEE
Trustee or director
2$0
CHRISTOPHER S FLANAGANTRUSTEE
Trustee or director
2$0
LAWRENCE F GARDNERTRUSTEE
Trustee or director
2$0
JEFFREY S GENECOVTRUSTEE
Trustee or director
2$0
PAUL R GENENDERTRUSTEE
Trustee or director
2$0
CYNTHIA A HANSONTRUSTEE
Trustee or director
2$0
BEAU H HARBOURTREASURER
Trustee or director, Officer
2$0
JEFFREY S HILLIERTRUSTEE
Trustee or director
2$0
BRADFORD R HIRSCHTRUSTEE
Trustee or director
2$0
DANIEL L HUNTTRUSTEE
Trustee or director
2$0
OTIS B JENNINGSTRUSTEE
Trustee or director
2$0
JATIN N KAKKARTRUSTEE
Trustee or director
2$0
ROBERT S KAPLANTRUSTEE
Trustee or director
2$0
MAHMOOD KHIMJITRUSTEE
Trustee or director
2$0
SUNGWAN KIMTRUSTEE
Trustee or director
2$0
KIMBERLY MEHENDALETRUSTEE
Trustee or director
2$0
MASON D KINGTRUSTEE
Trustee or director
2$0
ERIC K KUSINTRUSTEE
Trustee or director
2$0
CHRIS E J LEETRUSTEE
Trustee or director
2$0
JOSHUA LOBELTRUSTEE
Trustee or director
2$0
KRIS LOWETRUSTEE
Trustee or director
2$0
FRASER E MARCUSPRESIDENT
Trustee or director, Officer
2$0
DAVID R MCATEEVICE PRESIDENT
Trustee or director, Officer
2$0
ERIN S MCKOOLTRUSTEE
Trustee or director
2$0
W CASEY MCMANEMINTRUSTEE
Trustee or director
2$0
CRAIG M MEYERSTRUSTEE
Trustee or director
2$0
JAMES D MORANTRUSTEE
Trustee or director
2$0
ALENDA M OMONIJETRUSTEE
Trustee or director
2$0
HENRY R HILL PEROT IIITRUSTEE
Trustee or director
2$0
JOHN C ROCCHIOTRUSTEE
Trustee or director
2$0
JAMES B ROGERSTRUSTEE
Trustee or director
2$0
C DAVID SAMMONSTRUSTEE
Trustee or director
2$0
ALAN C SCHOELLKOPF JRTRUSTEE
Trustee or director
2$0
J CARL SEWELL IIITRUSTEE
Trustee or director
2$0
KATHERINE K STEINBRUECKTRUSTEE
Trustee or director
2$0
BRIAN S TYLERTRUSTEE
Trustee or director
2$0
VICTOR L VESCOVOTRUSTEE
Trustee or director
2$0
JOHN C WAGNERTRUSTEE
Trustee or director
2$0
A MICHAEL WARNECKETRUSTEE
Trustee or director
2$0
MICHAEL B WISENBAKERTRUSTEE
Trustee or director
2$0
WILLIAM E WOLCOTTTRUSTEE
Trustee or director
2$0
990 for the year ended June 30, 2024: 60 people
NameTitleHours / weekCompensationOther / benefits
DAVID DINIHEADMASTER
Officer
40$987,771$40,474
JOHN ASHTONASSOCIATE HEADMASTER
Key employee
40$478,004$39,743
SUZANNE TOWNSENDCHIEF FINANCIAL OFFICER
Officer
40$346,369$36,861
JOHN S JOLLYASST. HEADMASTER FOR EXTER
Key employee
40$303,898$33,247
TIMOTHY CROUCHDIRECTOR OF DEVELOPMENT
Highest-paid employee
40$198,579$31,824
JAMES E WINDLINGER JRCONTROLLER
Highest-paid employee
40$185,572$24,580
DEAN CLAYMANHEAD OF MIDDLE SCHOOL
Highest-paid employee
40$181,398$24,813
MARK WEBBDIRECTOR OF PHYSICAL PLANT
Highest-paid employee
40$183,511$22,141
THOMAS ECKELCHIEF TECHNOLOGY OFFICER
Highest-paid employee
40$175,678$20,719
DAVID B ACKERMANTRUSTEE
Trustee or director
2$0$0
LYDIA B ADDYTRUSTEE
Trustee or director
2$0$0
CYNTHIA C BROWNTRUSTEE
Trustee or director
2$0$0
MARWIN T BROWNTRUSTEE
Trustee or director
2$0$0
DAVID A CAMPBELLTRUSTEE
Trustee or director
2$0$0
NANCY P CARLSONTRUSTEE
Trustee or director
2$0$0
ROY A CHOITRUSTEE
Trustee or director
2$0$0
ERIC A CLARKTRUSTEE
Trustee or director
2$0$0
TONIKA CHEEK CLAYTONTRUSTEE
Trustee or director
2$0$0
KATHERINE R CROWTRUSTEE
Trustee or director
2$0$0
CHANDRA DHANDAPANITRUSTEE
Trustee or director
2$0$0
CHRISTOPHER S FLANAGANTRUSTEE
Trustee or director
2$0$0
LAWRENCE F GARDNERTRUSTEE
Trustee or director
2$0$0
JEFFREY S GENECOVTRUSTEE
Trustee or director
2$0$0
PAUL R GENENDERSECRETARY
Trustee or director, Officer
2$0$0
CYNTHIA A HANSONTRUSTEE
Trustee or director
2$0$0
BEAU H HARBOURTREASURER
Trustee or director, Officer
2$0$0
JEFFREY S HILLIERPRESIDENT
Trustee or director, Officer
2$0$0
BRADFORD R HIRSCHTRUSTEE
Trustee or director
2$0$0
DANIEL L HUNTTRUSTEE
Trustee or director
2$0$0
OTIS B JENNINGSTRUSTEE
Trustee or director
2$0$0
JATIN N KAKKARTRUSTEE
Trustee or director
2$0$0
ROBERT S KAPLANTRUSTEE
Trustee or director
2$0$0
MAHMOOD KHIMJITRUSTEE
Trustee or director
2$0$0
SUNGWAN KIMTRUSTEE
Trustee or director
2$0$0
KIMBERLY MEHENDALETRUSTEE
Trustee or director
2$0$0
MASON D KINGTRUSTEE
Trustee or director
2$0$0
ERIC K KUSINTRUSTEE
Trustee or director
2$0$0
CHRIS E J LEETRUSTEE
Trustee or director
2$0$0
JOSHUA LOBELTRUSTEE
Trustee or director
2$0$0
KRIS LOWETRUSTEE
Trustee or director
2$0$0
FRASER E MARCUSVICE PRESIDENT
Trustee or director, Officer
2$0$0
DAVID R MCATEETRUSTEE
Trustee or director
2$0$0
ERIN S MCKOOLTRUSTEE
Trustee or director
2$0$0
W CASEY MCMANEMINTRUSTEE
Trustee or director
2$0$0
CRAIG M MEYERSTRUSTEE
Trustee or director
2$0$0
JAMES D MORANTRUSTEE
Trustee or director
2$0$0
ALENDA M OMONIJETRUSTEE
Trustee or director
2$0$0
HENRY R HILL PEROT IIITRUSTEE
Trustee or director
2$0$0
JOHN C ROCCHIOTRUSTEE
Trustee or director
2$0$0
JAMES B ROGERSTRUSTEE
Trustee or director
2$0$0
C DAVID SAMMONSTRUSTEE
Trustee or director
2$0$0
ALAN C SCHOELLKOPF JRTRUSTEE
Trustee or director
2$0$0
J CARL SEWELL IIITRUSTEE
Trustee or director
2$0$0
KATHERINE K STEINBRUECKTRUSTEE
Trustee or director
2$0$0
BRIAN S TYLERTRUSTEE
Trustee or director
2$0$0
VICTOR L VESCOVOTRUSTEE
Trustee or director
2$0$0
JOHN C WAGNERTRUSTEE
Trustee or director
2$0$0
A MICHAEL WARNECKETRUSTEE
Trustee or director
2$0$0
MICHAEL B WISENBAKERTRUSTEE
Trustee or director
2$0$0
WILLIAM E WOLCOTTTRUSTEE
Trustee or director
2$0$0
990 for the year ended June 30, 2023: 60 people
NameTitleHours / weekCompensationOther / benefits
DAVID DINIHEADMASTER
Officer
40$1,008,462$37,255
JOHN ASHTONASSOCIATE HEADMASTER
Key employee
40$431,176$35,120
SUZANNE TOWNSENDCHIEF FINANCIAL OFFICER
Officer
40$318,879$33,186
JOHN S JOLLYASST. HEADMASTER FOR EXTER
Key employee
40$288,734$30,470
TIMOTHY CROUCHDIRECTOR OF DEVELOPMENT
Highest-paid employee
40$178,066$25,965
MARK WEBBDIRECTOR OF PHYSICAL PLANT
Highest-paid employee
40$178,487$23,121
DEAN CLAYMANHEAD OF MIDDLE SCHOOL
Highest-paid employee
40$178,214$22,772
THOMAS ECKELCHIEF TECHNOLOGY OFFICER
Highest-paid employee
40$181,181$18,342
JAMES E WINDLINGER JRCONTROLLER
Highest-paid employee
40$167,734$22,655
DAVID B ACKERMANTRUSTEE
Trustee or director
2$0$0
LYDIA B ADDYTRUSTEE
Trustee or director
2$0$0
KASIM ALFALAHITRUSTEE
Trustee or director
2$0$0
MARWIN T BROWNTRUSTEE
Trustee or director
2$0$0
DAVID A CAMPBELLTRUSTEE
Trustee or director
2$0$0
DREW A CAMPBELLTRUSTEE
Trustee or director
2$0$0
NANCY P CARLSONTRUSTEE
Trustee or director
2$0$0
ERIC A CLARKTRUSTEE
Trustee or director
2$0$0
JULIE D CLARKTRUSTEE
Trustee or director
2$0$0
TONIKA CHEEK CLAYTONTRUSTEE
Trustee or director
2$0$0
KATHERINE R CROWTRUSTEE
Trustee or director
2$0$0
CHANDRA DHANDAPANITRUSTEE
Trustee or director
2$0$0
ROBERT L FELDMANTRUSTEE
Trustee or director
2$0$0
CHRISTOPHER S FLANAGANTRUSTEE
Trustee or director
2$0$0
LAWRENCE F GARDNERTRUSTEE
Trustee or director
2$0$0
JEFFREY S GENECOVTRUSTEE
Trustee or director
2$0$0
PAUL R GENENDERSECRETARY
Trustee or director, Officer
2$0$0
CYNTHIA A HANSONTRUSTEE
Trustee or director
2$0$0
BEAU H HARBOURTREASURER
Trustee or director, Officer
2$0$0
JEFFREY S HILLIERPRESIDENT
Trustee or director, Officer
2$0$0
BRADFORD R HIRSCHTRUSTEE
Trustee or director
2$0$0
CLARK K HUNTTRUSTEE
Trustee or director
2$0$0
DANIEL L HUNTTRUSTEE
Trustee or director
2$0$0
OTIS B JENNINGSTRUSTEE
Trustee or director
2$0$0
JATIN N KAKKARTRUSTEE
Trustee or director
2$0$0
ROBERT S KAPLANTRUSTEE
Trustee or director
2$0$0
SUNGWAN KIMTRUSTEE
Trustee or director
2$0$0
MASON D KINGTRUSTEE
Trustee or director
2$0$0
ERIC K KUSINTRUSTEE
Trustee or director
2$0$0
CRAIG R LEVERINGTRUSTEE
Trustee or director
2$0$0
FRASER E MARCUSVICE PRESIDENT
Trustee or director, Officer
2$0$0
DAVID R MCATEETRUSTEE
Trustee or director
2$0$0
CINDY A MCCLAINTRUSTEE
Trustee or director
2$0$0
ERIN S MCKOOLTRUSTEE
Trustee or director
2$0$0
W CASEY MCMANEMINTRUSTEE
Trustee or director
2$0$0
KIMBERLY MEHENDALETRUSTEE
Trustee or director
2$0$0
CRAIG M MEYERSTRUSTEE
Trustee or director
2$0$0
JONATHAN B MORGANTRUSTEE
Trustee or director
2$0$0
RYAN K ROBINSONTRUSTEE
Trustee or director
2$0$0
ALENDA M OMONIJETRUSTEE
Trustee or director
2$0$0
JOHN C ROCCHIOTRUSTEE
Trustee or director
2$0$0
STEPHEN J ROGERSTRUSTEE
Trustee or director
2$0$0
C DAVID SAMMONSTRUSTEE
Trustee or director
2$0$0
ALAN C SCHOELLKOPF JRTRUSTEE
Trustee or director
2$0$0
J CARL SEWELL IIITRUSTEE
Trustee or director
2$0$0
MEGAN M SUNTRUSTEE
Trustee or director
2$0$0
VICTOR L VESCOVOTRUSTEE
Trustee or director
2$0$0
A MICHAEL WARNECKETRUSTEE
Trustee or director
2$0$0
MICHAEL B WISENBAKERTRUSTEE
Trustee or director
2$0$0
WILLIAM E WOLCOTTTRUSTEE
Trustee or director
2$0$0
JOHN C WAGNERTRUSTEE
Trustee or director
2$0$0

Address and contacts

Address (IRS master file)
10600 PRESTON RD, DALLAS, TX 75230-4047
In care of
% SUMMER LOVELAND
Principal officer (990 for 2024)
DAVID DINI, 10600 PRESTON ROAD, DALLAS, TX 75230
Signed the 990
SUMMER LOVELAND, CHIEF FINANCIAL OFFICER
Phone
(214) 346-8120
Return prepared by
LANE GORMAN TRUBITT LLC

Mission

ST. MARK'S SCHOOL OF TEXAS IS A PRIVATE, NON-PROFIT, NON-SECTARIAN, INDEPENDENT, COLLEGE PREPARATORY DAY SCHOOL FOR BOYS GRADES 1 THROUGH 12. THE SCHOOL AIMS TO AFFORD ITS STUDENTS WELL-ROUNDED PHYSICAL, INTELLECTUAL, AND SPIRITUAL EDUCATION.

990 for the year ended June 30, 2025

Program accomplishments

  • INSTRUCTIONAL GRADES 1 THROUGH 12 - ST. MARK'S SCHOOL OF TEXAS IS A PRIVATE, NON-PROFIT, NON-SECTARIAN, INDEPENDENT, COLLEGE PREPARATORY DAY SCHOOL FOR BOYS IN GRADES 1 THROUGH 12. THE SCHOOL AIMS TO AFFORD ITS STUDENTS WELL-ROUNDED PHYSICAL, INTELLECTUAL, AND SPIRITUAL EDUCATION. THE SCHOOL IS LOCATED IN DALLAS, TEXAS, AND HAS AN APPROXIMATE ENROLLMENT OF 915 BOYS.
    Expenses $41,233,747 · grants $4,140,687 · revenue $32,848,092
  • STUDENT ACTIVITIES - WIDE RANGING EXPENSES RELATED TO NONINSTRUCTIONAL ACTIVITIES OF STUDENTS INCLUDING COMMENCEMENT EXERCISES, STUDENT COUNCIL EXPENSES, AND CLASS FIELD TRIPS.
    Expenses $924,330 · revenue $718,891
  • NEW STUDENT ADMISSION FEES - EXPENSES RELATED TO THE MATRICULATIONOF STUDENTS TO THE SCHOOL.
    Expenses $890,966 · revenue $219,700
  • EXTENDED DAY - AFTER SCHOOL CARE FOR BOYS IN GRADES 1 THROUGH 4. THE PROGRAM HAS AN ENROLLMENT OF APPROXIMATELY 60 BOYS.
    Expenses $96,746 · revenue $172,477

What it must file and when

IRS records say it files Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N. Its accounting year ends in June, so each return is due on the 15th day of the 5th month after that.

Tax yearYear endedDueIRS public records
2025June 30, 2026November 16, 2026Not due yet
2024June 30, 2025November 17, 2025990 on file
2023June 30, 2024November 15, 2024990 on file

IRS record

EIN
75-0827460
Tax-exempt status
501(c)(3): Charitable, religious, educational or scientific organization
Foundation status
School
Donations deductible (Pub 78)
Public charity, 50% deduction limit
Exempt since
1952
Accounting year ends
June
Files
Form 990 or 990-EZ
Category (NTEE)
Education (B200)
Assets (IRS master file)
$420,229,863
Income (IRS master file)
$67,721,720

Filing history

FormYear endedRevenueExpensesAssetsReturn
990June 2025$46,400,356$51,680,080$420,229,863IRS
990-TJune 2025–––IRS
990June 2024$55,629,895$48,368,309$401,975,830XML
990-TJune 2024–––IRS
990June 2023$66,581,417$45,822,973$366,637,193XML
990-TJune 2023–––IRS
990June 2022$74,767,841$44,168,005$323,103,839IRS
990-TJune 2022–––IRS
990June 2021–––IRS
990-TJune 2021–––IRS
990June 2020–––IRS
990June 2019–––IRS
990June 2018–––IRS

990-N: the IRS bulk file holds only the latest e-Postcard per organization; earlier years come from archived copies of that file since 2020 and can have gaps (the IRS e-Postcard search lists every one). 990, 990-EZ, 990-PF, 990-T: every e-filed return in the IRS e-file index since 2019; XML for the latest three processing years, amounts from the IRS Statistics of Income extracts before that. PDF copies and determination letters at the IRS (search EIN 75-0827460).

Questions about ST MARKS SCHOOL OF TEXAS

What is the EIN of ST MARKS SCHOOL OF TEXAS?
The employer identification number (EIN) of ST MARKS SCHOOL OF TEXAS is 75-0827460.
Is ST MARKS SCHOOL OF TEXAS tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1952.
Are donations to ST MARKS SCHOOL OF TEXAS tax-deductible?
Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
Which annual return does ST MARKS SCHOOL OF TEXAS file?
Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N.
When is the next return of ST MARKS SCHOOL OF TEXAS due?
The return for tax year 2025 (the year ending June 30, 2026) is due November 16, 2026. Form 8868 extends it by six months; the 990-N cannot be extended.
When did ST MARKS SCHOOL OF TEXAS last file with the IRS?
The latest return in the IRS public files is the 990 for the year ended June 2025.
Who is the principal officer of ST MARKS SCHOOL OF TEXAS?
The 990 for the year ended June 30, 2025 names DAVID DINI.
Who are the officers and directors of ST MARKS SCHOOL OF TEXAS?
The 990 for the year ended June 30, 2025 lists 60 people; 9 received compensation from the organization, the highest $1,012,043 (DAVID DINI, HEADMASTER).
How much revenue does ST MARKS SCHOOL OF TEXAS have?
On its 990 for the year ended June 30, 2025 it reported revenue of $46,400,356, expenses of $51,680,080 and total assets of $420,229,863 at year end.

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