TMT International Observatory LLC
Key facts about TMT International Observatory LLC
In short: TMT International Observatory LLC reported $20K in grants paid in 2024 (a total; its filing lists no individual grants). Source: 2024 IRS Form 990.
- EIN
- 30-0833462
- Latest 990 filing
- Form 990, 2024
- Grants paid (2024)
- $20,158 — reported as a total on the IRS filing, without an itemized list
- Total assets
- $227,866,179
Data from IRS Form 990, 2024; updated September 2026.
Financial Overview
From 2024 IRS Form 990 · View filing
Total Assets
$227.9M
-1.4% YoY
Grants Paid (reported total)
$20K
-79.0% YoY
Revenue
$13.2M
-56.1% YoY
Net Investment Income
$789K
-48.5% YoY
How TMT International Observatory LLC gives
- Giving fell 52% from 2020 to 2023. Method
From the foundation's IRS Form 990 filings. Methodology.
About TMT International Observatory LLC
Based on IRS filings
TMT International Observatory LLC is a public charity focused on Science & Technology, based in Pasadena, CA. IRS filing data is available from 2020 through 2024. As of 2024, the organization holds $227.9M in total assets. In 2024, it reported $20K in grants paid as a total on its IRS filing, without an itemized list. Net investment income was $789K.
Focus Areas
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Geographic Focus
Where this funder awards grants
Grant Distribution by State
States
Cities
Giving Over Time
Total grant dollars and number of grants per year
From 2020 to 2024, annual grant giving ranged from $20K (2024) to $199K (2020). In 2024 it reported $20K in grants paid, as a total without an itemized list.
Hatched bars: grants paid as reported on the IRS filing, which lists no individual grants for that year.
Grant Insights
How this funder distributes its grants
Grant Size Distribution
13 grants across all recorded years
The most common grant size was under $50K: 9 grants of 13 (69%).
Giving History
Grant recipients and amounts by year
No grants recorded for 2024.
Financial History
Multi-year comparison from IRS filings
| Metric | 2024 | 2023 | 2022 |
|---|---|---|---|
| Total Assets | $227,866,179 | $231,193,423 | $225,068,605 |
| Revenue | $13,198,485 | $30,051,390 | $58,918,459 |
| Expenses | $16,449,330 | $16,100,316 | $15,439,309 |
| Net Investment Income | $788,761 | $1,532,089 | $442,569 |
Data update history
When this profile's IRS filing data changed on Grantable
- Updated Form 990 for fiscal year 2020 (received by the IRS November 11, 2021)
- Updated Form 990 for fiscal year 2021 (received by the IRS November 10, 2022)
- Updated Form 990 for fiscal year 2022 (received by the IRS November 10, 2023)
- Updated Form 990 for fiscal year 2023 (received by the IRS November 13, 2024)
- Updated Form 990 for fiscal year 2024 (received by the IRS November 17, 2025)
- IRS filings on file for fiscal years 2020–2024
Leadership & Key People
Officers and directors from IRS filings
TMT International Observatory LLC is led by Robert Kirshner, Executive Director since 2023 (on filings since 2022); 8 of 25 officers listed in 2024 are compensated.
Officers on the 2024 filing
Robert Kirshner
Executive Director
Executive Director - Start Date → Executive Director, 2023
On filings since 2022
40 hrs/week
$667K (2022) → $838K (2024)
Benjamin Gallagher
Telescope Optics Group Leader
M1 Segment Lead Engineer → Telescope Optics Group Leader, 2021
On filings since 2020
40 hrs/week
$233K (2020) → $280K (2024)
Eric Hansen
Deputy Project Manager
Opto Mechanical Engineer → Telescope Department Head, 2021
Telescope Department Head → Deputy Project Manager, 2022
On filings since 2020
40 hrs/week
$237K (2020) → $313K (2024)
Fengchuan Liu
Project Manager
Deputy Project Manager → Project Manager, 2021
On filings since 2020
40 hrs/week
$265K (2020) → $373K (2024)
Jose Teran
Facilities Department Head
On filings since 2021
40 hrs/week
$262K (2021) → $291K (2024)
Corinne Boyer
Adaptive Optics Group Leader
On filings since 2022
40 hrs/week
$242K (2022) → $265K (2024)
Kyle Kinoshita
Telescope Struct. Group Leader
Telescope Struct Group Leader → Telescope Struct. Group Leader, 2024
On filings since 2022
40 hrs/week
$229K (2022) → $246K (2024)
Gelys Trancho
Project Systems Engineer
New on the 2024 filing
40 hrs/week
$252K (2024)
An Ramaprakash
Governor
On filings since 2020
4 hrs/week
No compensation reported
Diana Jergovic
Secretary & Governor
Secretary & Governor → Secretary, Governor & Act Treasurer, 2021
Secretary, Governor & Act Treasurer → Secretary & Governor, 2023
On filings since 2020
4 hrs/week
No compensation reported
Eswar Reddy
Governor
On filings since 2020
4 hrs/week
No compensation reported
Feng Yuan
Governor -
Governor -Start Date → Governor, 2021
Governor → Governor -, 2024
On filings since 2020
4 hrs/week
No compensation reported
Henry Yang
Governor
On filings since 2020
4 hrs/week
No compensation reported
Luc Simard
Governor
On filings since 2020
4 hrs/week
No compensation reported
Michael Bolte
Governor
On filings since 2020
4 hrs/week
No compensation reported
Saku Tsuneta
Governor
On filings since 2020
4 hrs/week
No compensation reported
Suijian Xue
Governor -
Governor → Governor -, 2024
On filings since 2020
4 hrs/week
No compensation reported
Tomonori Usuda
Governor
On filings since 2020
4 hrs/week
No compensation reported
Xuefeng Wu
Governor -
Governor -Start Date → Governor, 2021
Governor → Governor -, 2024
On filings since 2020
4 hrs/week
No compensation reported
Tom Soifer
Governor
On filings since 2021
4 hrs/week
No compensation reported
Bruce Macintosh
Governor
Governor - Start Date → Governor, 2023
On filings since 2022
4 hrs/week
No compensation reported
Michitoshi Yoshida
Governor
Governor - Start Date → Governor, 2023
On filings since 2022
4 hrs/week
No compensation reported
Christopher Martin
Governor
Governor - Start Date → Governor, 2024
On filings since 2023
4 hrs/week
No compensation reported
Gilles Joncas
Governor
Governor - Start Date → Governor, 2024
On filings since 2023
4 hrs/week
No compensation reported
Michael Balogh
Governor - Start Date
New on the 2024 filing
4 hrs/week
No compensation reported
Former officers (17)
- Former: Christophe Dumas (2020–2023) — Observatory Scientist
- Former: Donald Brooks (2020–2023) — Governor -
- Former: Jonas Zmuidzinas (2020–2023) — Governor -
- Former: An Ramaparkash (2023) — Governor
- Former: James Johnson (2023) — Telescope Ctrl. Group Leader
- Former: Edward Stone (2020–2022) — Executive Director -
- Former: Kim Venn (2020–2022) — Governor -
- Former: Satori Iguchi (2020–2022) — Governor -
- Former: Gregg Goldman (2021–2022) — Governor -
- Former: Paul Jenny (2020–2021) — Governor & Act Treas-
- Former: Ravinder Bhatia (2020–2021) — Associate Project Manager
- Former: B Thomas Soifer (2020) — Governor
- Former: Gang Zhao (2020) — Governor-
- Former: Gary Sanders (2020) — Project Manager
- Former: Mark Sirota (2020) — Telescope Ctrls Group Leader
- Former: Praveer Asthana (2020) — Governor
- Former: Shude Mao (2020) — Governor -
Data from IRS Form 990 filings, 2020–2024. "On filings since" is the earliest filing we hold that lists the person; hours are average hours per week as reported.
Compensation Overview
From 2024 IRS filing
The highest reported compensation on the 2024 filing was $838K, to Robert Kirshner (Executive Director). 8 officers or directors reported compensation on that filing.
Frequently asked questions about TMT International Observatory LLC
How much does TMT International Observatory LLC give each year?
TMT International Observatory LLC reported $20K in grants paid in 2024 on its 2024 IRS Form 990, as a total without an itemized list of grants. In 2023 it gave $96K across 4 grants.
How large is TMT International Observatory LLC?
TMT International Observatory LLC reported $227.9M in total assets on its 2024 IRS Form 990. Its revenue that year was $13.2M.
What is TMT International Observatory LLC?
TMT International Observatory LLC is a public charity focused on Science & Technology, based in Pasadena, CA. It holds $227.9M in total assets as of 2024.
Where does TMT International Observatory LLC operate?
TMT International Observatory LLC has awarded grants in Hawaii.
What is TMT International Observatory LLC's EIN?
TMT International Observatory LLC's EIN (Employer Identification Number) is 30-0833462. IRS Form 990 filing data is available on this page for 2020–2024.
Data last updated September 2026. Sourced from IRS Form 990 filings.
Here's the math on researching TMT International Observatory LLC by hand.
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