- Revenue 2023
- $21,214,460
- Expenses 2023
- $46,043,471
Program services were 79.3% of total expenses calculated — Part IX's program-services column over total expenses, both as filed.
As filed
- Subsection
- 03
- NTEE code
- U31
- Classification
- 2100
- Street
- 300 N LAKE AVE FL 14
These codes are the IRS's own and are shown exactly as filed. What each one means is in the Business Master File documentation (opens in a new tab).
Mission and programs · 2023
Mission
GMTO CORPORATION IS A COLLABORATIVE EFFORT BETWEEN UNIVERSITIES AND RESEARCH INSTITUTIONS TO BUILD A NEXT GENERATION EXTREMELY LARGE TELESCOPE FOR ASTRONOMICAL RESEARCH.
Activities or mission (Part I)
UNDERTAKE DESIGN, DEVELOPMENT, CONSTRUCTION & OPERATION OF THE GIANT MAGELLAN TELESCOPE.
-
THE PURPOSE OF THE CORPORATION IS TO UNDERTAKE THE DESIGN, DEVELOPMENT, CONSTRUCTION AND OPERATION OF THE GIANT MAGELLAN TELESCOPE ("GMT"), A STATE-OF-THE-ART NEXT GENERATION ASTRONOMICAL TELESCOPE, AS A COLLABORATIVE EFFORT BETWEEN UNIVERSITIES AND RESEARCH ORGANIZATIONS. ALL CONTRIBUTIONS AND ALL EXPENSES ARE GEARED TOWARD THE FULFILLMENT OF THAT PURPOSE. DURING THE FISCAL YEAR ENDING JUNE 30, 2024, GMTO CONTINUED ON THE WORK ON ITS PRIMARY MIRROR SEGMENTS AND DESIGN WORK ON MAJOR SUBSYSTEMS, INCLUDING PROTOTYPING, AND UNDERWENT VARIOUS DESIGN REVIEWS.
Expenses $36,535,321
As filed on the 2023 return.
Officers and directors · 2023
As listed in Part VII of the 2023 return, in the order the filer printed them. Each return names its own; this is not a roster the organization keeps with us.
-
Walter MasseyWALTER MASSEY
CHAIR, BOARD OF DIRECTORS
- Total calculated
- $0
- Hours/week
- 1
-
Taft ArmandroffTAFT ARMANDROFF
VICE CHAIR, BOARD OF DIRECTORS
- Total calculated
- $0
- Hours/week
- 1
-
Wayne AlexanderWAYNE ALEXANDER
BOARD MEMBER
- Total calculated
- $0
- Hours/week
- 1
-
John ArnoldJOHN ARNOLD
BOARD MEMBER (FROM 2/24)
- Total calculated
- $0
- Hours/week
- 1
-
Jack BaldaufJACK BALDAUF
BOARD MEMBER
- Total calculated
- $0
- Hours/week
- 1
-
Buell JannuziBUELL JANNUZI
BOARD MEMBER
- Total calculated
- $0
- Hours/week
- 1
-
Lisa KewleyLISA KEWLEY
BOARD MEMBER
- Total calculated
- $0
- Hours/week
- 1
-
John MulchaeyJOHN MULCHAEY
BOARD MEMBER
- Total calculated
- $0
- Hours/week
- 1
-
Byeong-Gon ParkBYEONG-GON PARK
BOARD MEMBER
- Total calculated
- $0
- Hours/week
- 1
-
Chan ParkCHAN PARK
BOARD MEMBER (FROM 10/23)
- Total calculated
- $0
- Hours/week
- 1
-
Sung Hyun ParkSUNG HYUN PARK
BOARD MEMBER (THRU 10/23)
- Total calculated
- $0
- Hours/week
- 1
-
Sarah PearceSARAH PEARCE
BOARD MEMBER
- Total calculated
- $0
- Hours/week
- 1
-
Joaquin RuizJOAQUIN RUIZ
BOARD MEMBER (THRU 10/23)
- Total calculated
- $0
- Hours/week
- 1
-
Vitor De SouzaVITOR DE SOUZA
BOARD MEMBER (FROM 2/24)
- Total calculated
- $0
- Hours/week
- 1
-
Randy StringerRANDY STRINGER
BOARD MEMBER
- Total calculated
- $0
- Hours/week
- 1
-
Chris TinneyCHRIS TINNEY
BOARD MEMBER
- Total calculated
- $0
- Hours/week
- 1
-
Robert SheltonROBERT SHELTON
PRESIDENT
- Total calculated
- $591,548
- From this org
- $506,774
- From related orgs
- $0
- Other
- $84,774
- Hours/week
- 40
Schedule J breakdown matched by us
- Base
- $506,774
- Bonus
- $0
- Other
- $0
- Deferred
- $66,000
- Nontaxable benefits
- $18,774
- Filer's total
- $591,548
-
Alan GordonALAN GORDON
CFO & VP OF BUSINESS OPERATIONS
- Total calculated
- $362,318
- From this org
- $277,861
- From related orgs
- $0
- Other
- $84,457
- Hours/week
- 40
Schedule J breakdown matched by us
- Base
- $277,861
- Bonus
- $0
- Other
- $0
- Deferred
- $55,890
- Nontaxable benefits
- $28,567
- Filer's total
- $362,318
-
Kevin MillsKEVIN MILLS
VP FOR LEGAL AFFAIRS & GEN. COUNSEL
- Total calculated
- $265,782
- From this org
- $204,033
- From related orgs
- $0
- Other
- $61,749
- Hours/week
- 40
Schedule J breakdown matched by us
- Base
- $204,033
- Bonus
- $0
- Other
- $0
- Deferred
- $36,463
- Nontaxable benefits
- $25,286
- Filer's total
- $265,782
-
William BurgettWILLIAM BURGETT
PROJECT MANAGER
- Total calculated
- $367,666
- From this org
- $298,986
- From related orgs
- $0
- Other
- $68,680
- Hours/week
- 40
Schedule J breakdown matched by us
- Base
- $298,986
- Bonus
- $0
- Other
- $0
- Deferred
- $56,606
- Nontaxable benefits
- $12,074
- Filer's total
- $367,666
-
Glenn BrossusGLENN BROSSUS
DEPUTY PROJECT MANAGER
- Total calculated
- $347,393
- From this org
- $257,772
- From related orgs
- $0
- Other
- $89,621
- Hours/week
- 40
Schedule J breakdown matched by us
- Base
- $257,772
- Bonus
- $0
- Other
- $0
- Deferred
- $50,742
- Nontaxable benefits
- $38,879
- Filer's total
- $347,393
-
Rebecca BernsteinREBECCA BERNSTEIN
PROJECT SCIENTIST
- Total calculated
- $371,501
- From this org
- $304,380
- From related orgs
- $0
- Other
- $67,121
- Hours/week
- 40
Schedule J breakdown matched by us
- Base
- $304,380
- Bonus
- $0
- Other
- $0
- Deferred
- $51,392
- Nontaxable benefits
- $15,729
- Filer's total
- $371,501
-
Frank GroarkFRANK GROARK
DEPUTY OPT. & OPTICAL METROLOGY MGR.
- Total calculated
- $331,783
- From this org
- $247,134
- From related orgs
- $0
- Other
- $84,649
- Hours/week
- 40
Schedule J breakdown matched by us
- Base
- $247,134
- Bonus
- $0
- Other
- $0
- Deferred
- $50,965
- Nontaxable benefits
- $33,684
- Filer's total
- $331,783
-
Richard DemersRICHARD DEMERS
WAVEFRONT SENSING & CONTROL MANAGER
- Total calculated
- $313,600
- From this org
- $251,954
- From related orgs
- $0
- Other
- $61,646
- Hours/week
- 40
Schedule J breakdown matched by us
- Base
- $251,954
- Bonus
- $0
- Other
- $0
- Deferred
- $49,572
- Nontaxable benefits
- $12,074
- Filer's total
- $313,600
-
Bruce BigelowBRUCE BIGELOW
SITE, ENCLOSURE, FACILITIES MGR
- Total calculated
- $307,630
- From this org
- $246,956
- From related orgs
- $0
- Other
- $60,674
- Hours/week
- 40
Schedule J breakdown matched by us
- Base
- $246,956
- Bonus
- $0
- Other
- $0
- Deferred
- $48,600
- Nontaxable benefits
- $12,074
- Filer's total
- $307,630
The first 25 listed. Compensation is as filed in Part VII: reportable pay from this organization and from related organizations, other compensation, and hours per week. The total, marked calculated, is our sum of the three dollar columns, with a blank column counted as $0; the form itself has no total. On a Form 990-EZ the columns are Part IV's instead, and on a Form 990-PF Part VIII's — compensation, contributions to benefit plans, and expense account — and the total sums those. A Schedule J breakdown is as filed: base pay, bonus, other, deferred compensation and nontaxable benefits from this organization, with any from related organizations beside each, and the filer's own total. It is shown with the Part VII listing of the same name on the same return. The form gives no key between the two, so that pairing is ours, and is marked matched by us. Earlier years are each on their own filing page.
Filings
-
2023
- Revenue
- $21,214,460
- Expenses
- $46,043,471
- Contributions
- $19,984,346
- Grants paid
- $0
-
2022
- Revenue
- $194,662,618
- Expenses
- $36,380,093
- Contributions
- $193,810,505
- Grants paid
- $0
The four totals the IRS asks for on Part I of the Form 990, as filed. A dash means the figure was not present on the return — not that it was zero.
Other returns filed
-
2021 · 990
- Revenue
- $32,220,104
- Expenses
- $37,165,448
- Assets (EOY)
- $321,703,747
-
2020 · 990
- Revenue
- $8,771,769
- Expenses
- $34,752,653
- Assets (EOY)
- $305,649,164
-
2019 · 990
- Revenue
- $4,199,536
- Expenses
- $40,709,497
- Assets (EOY)
- $330,327,152
-
2018 · 990
- Revenue
- $40,599,120
- Expenses
- $39,820,884
- Assets (EOY)
- $367,820,702
-
2017 · 990
- Revenue
- $10,946,024
- Expenses
- $38,930,666
- Assets (EOY)
- $365,009,321
-
2016 · 990
- Revenue
- $5,515,656
- Expenses
- $28,509,469
- Assets (EOY)
- $387,702,781
-
2015 · 990
- Revenue
- $2,528,643
- Expenses
- $34,995,896
- Assets (EOY)
- $411,816,468
-
2014 · 990
- Revenue
- $347,399,787
- Expenses
- $16,606,973
- Assets (EOY)
- $440,351,720
-
2013 · 990
- Revenue
- $27,792,782
- Expenses
- $11,026,348
- Assets (EOY)
- $107,563,164
-
2012 · 990
- Revenue
- not reported
- Expenses
- $13,476,297
- Assets (EOY)
- $89,204,406
Nonprofiteer parses Forms 990, 990-EZ and 990-PF, in a window of recent tax years. These returns are recorded from the IRS e-file index, so their figures were extracted by that index rather than read from the return here — treat them as a different source from the filings above, not as more of the same record. A dash means the index carries no figure; Form 990-T listings carry none at all. Showing the 10 most recent; the API carries the rest.
Grants made
No itemized grants to organizations. Schedule I is filed only by organizations that granted more than $5,000 to a recipient, so most filers have none.
Grants received
-
ASSOCIATION OF UNIVERSITIES FOR
$2,480,059
2022 SCIENTIFIC RESEARCH AND DEVELOPMENT FOR THE US EXTREMELY LARGE TELESCOPE PROGRAM
-
ASSOCIATION OF UNIVERSITIES FOR
$1,455,307
2023 SCIENTIFIC RESEARCH AND DEVELOPMENT FOR THE US EXTREMELY LARGE TELESCOPE PROGRAM
-
2023 FOR RECIPIENT'S EXEMPT PURPOSE
Other IRS files
Auto-Revocation List
Not listed. The IRS publishes this list for organizations whose exemption was automatically revoked for failing to file for three consecutive years.
Publication 78
Listed as of 13 October 2026, under deductibility PC.
These are two separate IRS files on two separate schedules, shown as published and not reconciled with each other. Neither is a statement about whether a contribution is deductible today: 19,245 organizations appear in Publication 78 while the IRS's own revocation file lists them as currently revoked, more than half of those revoked before 2019. Absence from Publication 78 is evidence of nothing, and presence is not evidence either. Verify current status with the IRS before relying on it.
What this page reflects
The registration facts above come from the IRS Business Master File published 13 October 2026 and read 1 November 2026, for every organization at once. Returns through tax year 2023, the newest we have parsed for this organization.