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Person · officer / director

Sonja Plesset

Executive Director · James M and Cathleen D Stone Family Foundation INC

Executive Director at James M and Cathleen D Stone Family Foundation INC. Listed as an officer, director, or key employee across 3 organizations on the Form 990 record.

This is me
Ambiguous identity This name matches 1 other individual we could not verify as the same person. Each is kept as a separate record below — treat them as distinct people unless an explicit match is confirmed.
Organizations
3
Roles reported
3
Reported compensation
$133K
Others who share this name
1

Who this is

Profile

The filed facts are verified from the IRS filings. The biography is compiled from public web sources and grounded to that filed record.

✓ Verified from filings
●
Reported as Executive Director of James M and Cathleen D Stone Family Foundation INC, based in Boston, MA.
●
Received $133K in total reported compensation on the most recent Form 990 (Part VII).
●
Also listed as Trustee / Executive Director of James M and Cathleen D Stone Foundation — $66K.
●
Also listed as Trustee of The Plymouth Rock Assurance Foundation, uncompensated.
Facts extracted directly from each organization's Form 990, Part VII.
Biography In progress
We're building a sourced biography for every person — from filings, news, and public records, citing where each fact comes from. Person-name searches are our single largest source of demand, so this is what we're shipping next.

Affiliations

Organizations

Linked as the same person by IRS Schedule R, a shared officer mailing address, or shared fellow board members.

T
The Plymouth Rock Assurance Foundation Trustee · $1.1M revenue · Boston, MAFiled FY2025, FY2024, FY2023, FY2022, FY2020 · Source: Form 990, Part VII
J
James M and Cathleen D Stone Family Foundation INC Executive Director · $2.5M revenue · Boston, MATO PROMOTE THE EDUCATIONAL AND SCIENTIFIC PURPOSES OF HARVARD UNIVERSITY AND THE BOSTON FOUNDATION, INC. BY PROVIDING SUPPORT FOR RESEARCH AND…pay $91K → $66KFiled FY2024, FY2023 · Source: Form 990, Part VII
$66Kreported comp
J
James M and Cathleen D Stone Foundation Trustee / Executive Director · $1.6M revenue · Boston, MApay $109K → $66KFiled FY2024, FY2023, FY2021 · Source: Form 990, Part VII
$66Kreported comp

Disambiguation

Other people named Sonja Plesset

Different individuals who share this name, separated by IRS Schedule R, mailing address, and shared-board evidence. The 990 carries no person identifier, so some may still be the same person.

S
Sonja Plesset 1 organization · Boston, MACathleen Stone Island Outward Bound School INC

Network

Serves alongside

Other officers, directors & key employees at this person's organizations, by latest reported compensation.

M
Clerk & Trustee · FY2024
J
Trustee · FY2024
C
President & Trustee · FY2024
J
Chair & Trustee · FY2024
J
Treasurer & Trustee · FY2024
S
Trustee · FY2024
J
Trustee · FY2024
E
Assistant Treasurer · FY2024
P
Clerk & Trustee (thru 7/13/21) · FY2021
R
Trustee (thru 7/13/21) · FY2021
P
Trustee · FY2025
L
Trustee · FY2025

Network

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Public data from IRS Form 990 e-file & the Business Master File. Individuals appear here because they were named as an officer, director, or key employee on a nonprofit's Form 990; people are grouped by name plus corroborating evidence (Schedule R, shared address, shared board members). · philanthropy.org