TMT International Observatory LLC

Analysis

TMT International Observatory LLC is a registered charity in United States, based in Monrovia, CA. It received its IRS tax-exemption ruling in May 2015, 11 years ago. Its declared purposes cover science and technology, which this site groups under arts, culture, heritage and science. The IRS classifies it as a publicly supported organisation (donations from the general public) under section 501(c)(3), and contributions to it are listed as tax-deductible.

In the financial year ending December 2023, TMT International Observatory LLC reported income of $30.1m and spending of $16.1m, leaving 46% of income unspent that year. Across the 5 years on record, from December 2019 to December 2023, income grew from $21.9m to $30.1m (+37%), an average of +8.2% a year. The sharpest change came in the year to December 2022, when income rose by 130%. Over the whole period it spent 54% of the income it received.

Among 45,478 United States charities whose main cause is arts, culture, heritage and science and that reported income, TMT International Observatory LLC sits at the 99th percentile: it is one of the largest 1% in its cause. Against every charity in United States with reported income it ranks in the 98th percentile, and in the 98th percentile within CA. Charities of a similar size with the same main cause include Seattle Art Museum ($30.0m), Tennessee Performing Arts Center Management Corporation ($30.4m) and Laurel Lake Retirement Community Inc ($29.9m).

On its Form 990 for the period ending December 2023, revenue came from contributions and grants 68% of the total. Other salaries and wages came to $2.9m. At year end it held assets of $231.2m against liabilities of $25.6m, net assets of $205.5m. It reported 56 employees.