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 462118727 · San Diego, CAiSource and licenceOrganisation record IRS Exempt Organizations Business Master File (EIN 462118727) - 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 tenure.Latest return IRS Form 990 series e-file data - 990 for the year to 30 June 2025: assets, liabilities, staff, website, telephone, pay.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 (us-approach-v4-clean). 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

Sandiego350

Donations deductible
Revenue
$743k
year to 30 June 2025
Expenses
$502k
year to 30 June 2025
Total assets
$714k
$4k liabilities
Net assets
$710k
assets less liabilities
Directors and trustees
9
4.3y av
Staff
20
employees, year to 30 June 2025
Left since last filing
0
no seats appear to have opened
Officers and senior staff
8
named in Part VII
How am I connected?

Sandiego350's network

9 people2 organisationsi9 people and 2 organisations on this map.The large node is the subject of this page. Solid lines are what the register itself records (9). 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

9 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.Tenure and departures are observed across annual filings. Observed tenure is a lower bound - a member may have joined before the first year on record. The organisation reported 11 voting members of its governing body on its latest Form 990 Part VI, which matches the board listed here.
NameRole as filedSinceOn the board
Anita MartinezCompany secretary2022
4 yrs
Ann SheridanDirector2025
1 yr
James MillerDirector2020
6 yrs
Joshua PiedraDirector2021
5 yrs
Kath RogersDirector2020
6 yrs
Kobi SchneiderDirector2025
1 yr
Max LebovitzDirector2021
5 yrs
Rebecca RojasDirector2020
6 yrs
Steven GelbDirector2025
1 yr
Under 5 years5 to 6 years6 years or more

Officers and senior leadership

8 listediNamed in Part VII as officers, key employees or highest-compensated staff - not board members, shown for completeness.
NameTitle as filedOn the filings
Joyce LanePresidentsince 2019
Kath RogersBoard Member2019
Kimberly KishonPresident2019
Masada DisenhouseExecutive Directorsince 2019
Rebecca RojasCompany secretary2019
Toshi IshiharaBoard Member2019
Trung NyugenVolunteer Coordinator2019
William WellhouseTreasurersince 2019

Pay and hours

year to 30 June 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
Masada DisenhouseExecutive Dir.40$70k
Anita MartinezSecretary2$0
Rebecca RojasDirector2$0
James MillerDirector2$0
Steven GelbDirector0$0
Kobi SchneiderDirector0$0
Joshua PiedraDirector4$0
Max LebovitzDirector2$0
Kath RogersDirector0$0
Ann SheridanDirector0$0
Joyce LanePresident5$0
William WellhouseTreasurer3$0

About

Legal name
Sandiego350
EIN
462118727
Address
3900 Cleveland Ave Ste A, San Diego, CA, 92103-3403
State
California
Mission
SanDiego350 is building a movement to prevent the worst impacts of climate change and climate injustice. SanDiego350 strives to create a future that supports a livable planet and just society through education, outreach, public policy advocacy and volunteer action. (as filed on the Form 990)
Activity (NTEE)
C01 Environment
IRS classification
501(c)03 (tax-exempt under section 501(c)(3) where shown)
Classified purpose
Environment
Size band
5 (IRS master file code)
Formed
2014
IRS ruling date
1 October 2014
Status
Code 01 (unconditional exemption)
Form 990 filings on record
6, latest 2025
IRS Publication 78
PC (contributions deductible)
Principal officer
Simon Mayeski (Form 990-N, tax year 2015)

Most connected

Longest observed on the filings

≥6years on the filingsJames Miller
≥6years on the filingsKath Rogers
≥6years on the filingsRebecca Rojas
≥5years on the filingsJoshua Piedra

Latest return

year to 30 June 2025iFigures from the newest Form 990 or 990-EZ in the IRS e-file releases of 2025 and 2026, for the year ending 30 June 2025. US dollars, as filed.
Total assets
$714k
Total liabilities
$4k
Net assets or fund balances
$710k
Contributions and grants received
$718k
Program service revenue
$1k
Employees
20

Filed finances

1 yeariTotals as filed on the IRS Form 990 (revenue and expenses), by tax year.
Tax yearTotal revenueTotal expensesSurplus or deficit
2024$743k$502k$241k

As filed on the IRS Form 990. US dollars.