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US nonprofit · EIN 992133246 · San Francisco, CAiSource and licenceOrganisation record IRS Exempt Organizations Business Master File (EIN 992133246) - NTEE activity code, address.Board and officers IRS Form 990 annual filings, Part VII (directors, trustees, officers, key employees), read year by year to observe time served.Latest return IRS Form 990 series e-file data - 990 for the year to 31 December 2024: assets, liabilities, staff, website, telephone, pay, grants paid (Schedule I).Finances by year IRS Form 990 e-file data - total revenue and total expenses by tax year.Renewal outlook Computed by Governance Register from the observed filing history and filed revenue. Not a statement that the organisation is recruiting.Deductibility IRS Publication 78 data (code PC), downloaded 18 October 2026.Licence US Federal Government public domain.How we handle data

Holobiont Medical Research Foundation

Donations deductible
Revenue
$335k
year to 31 December 2024
Expenses
$326k
year to 31 December 2024
Total assets
$9k
$0 liabilities
Net assets
$9k
assets less liabilities
Directors and trustees
5
2.4 years on average
Staff
0
employees, year to 31 December 2024
Left since last filing
0
no seats appear to have opened
Voting members
5
reported in Part VI
How am I connected?

Holobiont Medical Research Foundation's network

5 people2 organisationsi5 people and 2 organisations on this map.The large node is the subject of this page. Solid lines are what the register itself records (5). Violet dotted lines (2) are likely: the same full name sits on the current board of another organisation in the same register and region. Form 990 filings give names without a person identifier; SEC insider filings carry a CIK. It may be a different person.

The board

5 listediTime on the board is observed from the annual filings: the IRS files no appointment date, so the bar counts years from the first filing the person appears on - a lower bound, not a filed start date. Names are exactly as filed. The IRS publishes no person identifier, so this edition does not yet link a person across organisations in the tables. The network map shows same-name matches as likely links only, never as confirmed.Time served and departures are observed across annual filings. Observed time served is a lower bound - a member may have joined before the first year on record. The organisation reported 5 voting members of its governing body on its latest Form 990 Part VI, which matches the board listed here.
NameRole as filedSinceOn the board
Carlos BustamanteCompany secretary2024
2 yrs
Howard MaibachDirector2024
2 yrs
Julia DurackVice President2024
2 yrs
Larry WeissPresident2024
2 yrs
Rita ColwellTreasurer2024
2 yrs
Under 5 years5 to 6 years6 years or more

Pay and hours

year to 31 December 2024iFrom Part VII of the Form 990: compensation reported for each officer, director, trustee, key employee and highest-paid staff member, and the average hours a week they report. Most board members are unpaid; a blank means nothing was reported. Pay from related organisations is shown separately.
NameTitle as filedHours a weekPay from the organisationRelated organisationsOther
Larry WeissPresident2$0
Julia DurackVice President1$0
Carlos BustamanteSecretary1$0
Rita ColwellTreasurer1$0
Howard MaibachDirector1$0

No pay was reported for anyone in Part VII on this return.

About

Legal name
Holobiont Medical Research Foundation
EIN
992133246
Address
2325 3rd St Ste 223, San Francisco, CA, 94107-3198
State
California
Mission
The holobiont medical research foundation is dedicated to advancing scientific knowledge and improving human health through research and innovation. Our mission is to unravel the intricate connections between the human microbiome, exposome and physiological processes within the human body that define health and well-being. (as filed on the Form 990)
Activity (NTEE)
E12 Health care
IRS classification
501(c)03 (tax-exempt under section 501(c)(3) where shown)
Classified purpose
Health Care
Size band
1 (IRS master file code)
Formed
2024
Principal officer
Larry Weiss (as named on the Form 990)
IRS ruling date
1 September 2024
Status
Code 01 (unconditional exemption)
Form 990 filings on record
1, latest 2024
IRS Publication 78
PC (contributions deductible)

Most connected

Longest observed on the filings

≥2years on the filingsCarlos Bustamante
≥2years on the filingsHoward Maibach
≥2years on the filingsJulia Durack
≥2years on the filingsLarry Weiss

Latest return

year to 31 December 2024iFigures from the newest Form 990 or 990-EZ in the IRS e-file releases of 2025 and 2026, for the year ending 31 December 2024. US dollars, as filed.
Total assets
$9k
Total liabilities
$0
Net assets or fund balances
$9k
Contributions and grants received
$335k
Program service revenue
$0
Grants and similar paid out
$302k
Employees
0

Filed finances

1 yeariTotals as filed on the IRS Form 990 (revenue and expenses), by tax year.
Tax yearTotal revenueTotal expensesSurplus or deficit
2024$335k$326k$9k

As filed on the IRS Form 990. US dollars.

Grants paid

2 listediFrom Schedule I of the Form 990: grants and assistance to organisations in the United States, largest first (up to 25). Schedule I is filed only by organisations that gave more than $5,000 to any one recipient.
RecipientPurposeAmount
Weiss Bioscience IncMedical research$251k
Biomemimetics LLCMedical research$51k