Skip to content
Governance Register
Sign inFind yourself
Find yourselfSign in
Search How it works For organisations For professionals

Edition

United KingdomIrelandUnited States (current)New ZealandCanadaAustraliaScotlandNorthern Ireland
US nonprofit · EIN 474688802 · Oakland, CAiSource and licenceOrganisation record IRS Exempt Organizations Business Master File (EIN 474688802) - 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 2025: assets, liabilities, staff, website, telephone, pay, grants paid (Schedule I).Renewal outlook Computed by Governance Register from the observed filing history and filed revenue. Not a statement that the organisation is recruiting.Principal officer IRS Form 990-N (e-Postcard) - principal officer named for tax year 2015.Deductibility IRS Publication 78 data (code PC), downloaded 18 October 2026.Licence US Federal Government public domain.How we handle data

Holistic Underground Inc

Donations deductible
Revenue
$1.4m
year to 31 December 2025
Expenses
$788k
year to 31 December 2025
Total assets
$1m
$30k liabilities
Net assets
$983k
assets less liabilities
Directors and trustees
3
5.8 years on average
Staff
12
2 volunteers
Left since last filing
0
no seats appear to have opened
Officers and senior staff
2
named in Part VII
How am I connected?

Holistic Underground Inc's network

3 people2 organisationsi3 people and 2 organisations on this map.The large node is the subject of this page. Solid lines are what the register itself records (3). 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

3 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 3 voting members of its governing body on its latest Form 990 Part VI, which matches the board listed here.
NameRole as filedSinceOn the board
Gregory JacksonTreasurer2021
5 yrs
Jihan McDonaldCompany secretary2022
4 yrs
Mazin Jamal Mahgoub (also filed as Mazin Mahgoub)Executive D2019
7 yrs
Under 5 years5 to 6 years6 years or more

Officers and senior leadership

2 listediNamed in Part VII as officers, key employees or highest-compensated staff - not board members, shown for completeness.
NameTitle as filedOn the filings
Carolina PissarroCompany secretary2022
Gregory JacksonTreasurer2022

Pay and hours

year to 31 December 2025iFrom 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
Mazin Jamal MahgoubPresident40$119k$100
Ahmed SalamSecretary0.2$0
Jihan McDonaldTreasurer0.2$0

About

Legal name
Holistic Underground Inc
EIN
474688802
Address
2323 Broadway, Oakland, CA, 94612-2414
State
California
Mission
Holistic Underground Inc.s mission is to strengthen the capacity and sustainability of nonprofit organizations, community initiatives, and social enterprises by providing fiscal sponsorship, financial management, operational infrastructure, and strategic advisory services. The organization exists to support charitable projects advancing education, public health, community well-being, and... (as filed on the Form 990)
Activity (NTEE)
A20 Arts, culture and humanities
IRS classification
501(c)03 (tax-exempt under section 501(c)(3) where shown)
Classified purpose
Arts, Culture & Humanities
Size band
4 (IRS master file code)
Formed
2015
Principal officer
Mazin Jamal Mahgoub (as named on the Form 990)
IRS ruling date
1 December 2015
Status
Code 01 (unconditional exemption)
Form 990 filings on record
4, latest 2023
IRS Publication 78
PC (contributions deductible)

Most connected

Longest observed on the filings

≥7years on the filingsMazin Jamal Mahgoub
≥5years on the filingsGregory Jackson
≥4years on the filingsJihan McDonald

Latest return

year to 31 December 2025iFigures from the newest Form 990 or 990-EZ in the IRS e-file releases of 2025 and 2026, for the year ending 31 December 2025. US dollars, as filed.
Total assets
$1m
Total liabilities
$30k
Net assets or fund balances
$983k
Contributions and grants received
$1.4m
Program service revenue
$78k
Grants and similar paid out
$109k
Employees
12
Volunteers
2

Grants paid

4 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
Keys to MusicMusic Support$47k
AedpTherapy Research$20k
One Step CloserJustice & Equity Diversity$13k
Earthkeepers Wisdom SchoolSpiritual Retreats$11k