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EIN 30-0833462

Thirty Meter Telescope International Observatory (TIO)

IRS 501(c) type
501(c)(3)
Num. employees
56
City
Pasadena
State
California
Year formed
2014
Most recent tax filings
2023-12-01
NTEE code, primary
U00: Science and Technology Research: General
Description
The Thirty Meter Telescope International Observatory (TIO) seeks to advance scientific knowledge while fostering connection among the partner countries and their citizens, who represent over half the world’s population.
Also known as...
TMT International Observatory LLC; Edward Stone MBR
Total revenues
$30,051,390
2023
Total expenses
$16,100,316
2023
Total assets
$231,193,423
2023
Num. employees
56
2023

Grants made by TIO

GranteeGrant descriptionAmount
Council for Native Hawaiian AdvancementKako'S Maui Fund for Communities Impacted By Fires on Maui - Funds Matched$50,000
Camp Agape HawaiiSponsor Camp Agape in Hawaii$25,000
Malama Aina FoundationCulture Based and Place Based Steam Programs$15,000
...and 1 more grant made

Who funds Thirty Meter Telescope International Observatory (TIO)

Grants from foundations and other nonprofits
GrantmakerDescriptionAmount
Mithun Family FoundationGeneral Fund$1,000

Financials for TIO

RevenuesFYE 12/2023
Total grants, contributions, etc.$20,300,538
Program services$0
Investment income and dividends$1,532,089
Tax-exempt bond proceeds$0
Royalty revenue$0
Net rental income$0
Net gain from sale of non-inventory assets$0
Net income from fundraising events$0
Net income from gaming activities$0
Net income from sales of inventory$0
Miscellaneous revenues$8,218,763
Total revenues$30,051,390

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Project Liberty InstituteNew York, NY$15,048,195
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Sea Education AssociationFalmouth, MA$7,688,944
Institute for Advanced Study (IAS)Princeton, NJ$88,395,697
Astrophysical Research ConsortiumSeattle, WA$8,264,413
Iup Research InstituteIndiana, PA$8,578,416
Data update history
January 16, 2025
Posted financials
Added Form 990 for fiscal year 2023
January 13, 2025
Updated personnel
Identified 1 new personnel
January 5, 2025
Used new vendors
Identified 1 new vendor, including
January 5, 2025
Received grants
Identified 1 new grant, including a grant for $1,000 from Mithun Family Foundation
September 11, 2024
Updated personnel
Identified 4 new personnel
Nonprofit Types
Social advocacy organizationsResearch centersCharities
Issues
Science and technology
Characteristics
Conducts researchLobbyingOperates internationallyReceives government fundingTax deductible donationsAccepts online donations
General information
Address
100 W Walnut St Suite 300
Pasadena, CA 91124
Metro area
Los Angeles-Long Beach-Anaheim, CA
County
Los Angeles County, CA
Website URL
tmt.org/ 
Phone
(808) 227-2350
IRS details
EIN
30-0833462
Fiscal year end
December
Taxreturn type
Form 990
Year formed
2014
Eligible to receive tax-deductible contributions (Pub 78)
Yes
Categorization
NTEE code, primary
U00: Science and Technology Research: General
NAICS code, primary
813312: Environment, Conservation, and Wildlife Organizations
Parent/child status
Independent
California AB-488 details
AB 488 status
May Not Operate or Solicit for Charitable Purposes
Charity Registration status
Delinquent
FTB status revoked
Not revoked
AG Registration Number
CT0230466
FTB Entity ID
None yet
AB 488 data last updated ("as-of") date
2025-07-02
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