The Rhode Island State Capitol

Form 990-PFTax year 2024EIN 05-0494244

Trimix Foundation

A private foundation in Providence, RI. Its return for tax year 2024 lists 3 grants and $1.1 million paid in grants.

Tax year 2024 (period ending Dec 31, 2024), read from the IRS e-file on Nov 11, 2026. Returns reach the IRS 5 to 18 months after the year they describe.

How to apply

Accepts applications

The return gives an application contact and rules, as below.

Contact
Mark Mixer
C/o Pathstone Family Office 50 Park, Row West NO113
Providence, RI 02903
(401) 383-5370
Form and materials
Applications should be written requests on letterhead and should provide information regarding qualified charitable status and intended use of grant.
Deadlines
N/A
Restrictions
N/A

Assets and giving by year

6 returns on file
Grants paid by tax year. The latest year is in blue.
  • Tax year 2024

    $1,097,471

    Grants listed
    3
    Assets, end of year
    $45,244,058
  • Tax year 2023

    $874,812

    Grants listed
    5
    Assets, end of year
    $45,325,661
  • Tax year 2022

    $2,274,798

    Grants listed
    9
    Assets, end of year
    $43,075,822
  • Tax year 2021

    $2,529,868

    Grants listed
    17
    Assets, end of year
    $43,016,864
  • Tax year 2020

    $2,049,550

    Grants listed
    25
    Assets, end of year
    $42,804,814
  • Tax year 2019

    $2,005,800

    Grants listed
    33
    Assets, end of year
    $44,274,811

Grants paid in 2024

3 grants, largest first

As listed on the return.

  1. Mill Town Private FoundationPittsfield, MA

    Program developement

    $592,471
  2. Union CollegeSchenectady, NY

    Science and technology building

    $500,000
  3. Railroad Street Youth ProjectGT Barrington, MA

    Exempt purpose

    $5,000

Where the money goes

By cause: grants to organizations we matched to the IRS list of exempt organizations, by their category.

  1. Philanthropy and grantmaking1 grant $592,47199% of the total
  2. Youth development1 grant $5,000<1% of the total

By State

Grants to organizations with a US address, latest year.

  1. Rhode Island1 grant $592,471
  2. New York1 grant $500,000
  3. Massachusetts1 grant $5,000

Officers, directors and trustees

6 people as filed

As filed on the return, with average hours per week and pay from the foundation.

  • David P MixerDIRECTOR/VICE PRESIDENT Hours 1Pay $0
  • Brian MixerDIRECTOR Hours 1Pay $0
  • Mark MixerDIRECTOR/PRESIDENT Hours 1Pay $0
  • Michael MixerDIRECTOR Hours 1Pay $0
  • Matthew A ThibaultSECRETARY Hours 2Pay $0
  • Arthur X DuffyDIRECTOR/TREASURER Hours 2Pay $0

The return

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