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· Private foundation

Polly Thayer Starr Charitable Trust Hemenway & Barnes LLP

Its FY2026 filing reports that it accepted unsolicited grant applications.

$406k
Granted FY2026still arriving
7
Grants FY2026still arriving
2
States reached
$110k
Largest
01What it funds
0198% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2017 to 2025.

Arts & Culture$1.5MHealth$850kEnvironment$150kEducation$65kCivil Rights$55kHousing & Shelter$8kHuman Services$570Other$0
02FY2026 · 7 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2026

  • $10k–50k4 grants · $96k
  • $50k–250k3 grants · $310k
$27,500
Median grant
2
States reached
$6.0M
Total assets
Largest grants
RecipientAmount
PROPRIETORS OF THE BOSTON ATHENEAUM$110,000
NORWELL VISITING NURSE ASSOCIATION INC$100,000
ISABELLA STEWART GARDNER MUSEUM$100,000
TRUSTEES OF TUFTS COLLEGE FBO SCHOOL OF THE MUSEUM OF FINE ARTS AT TUFTS$27,500
BOSTON ARTS ACADEMY FOUNDATION INC$25,000
UNITARIAN UNIVERSALIST URBAN MINISTRY$25,000
NEW BRITAIN MUSEUM OF AMERICAN ART INC$18,750
02The need
03

Does the money reach high-need areas?

Each grant placed by the hardship in its grantee’s ZIP, against the area’s typical level.

show:

Its human-services grants (FY21–21, $570) land where the poverty rate runs at 8%, against an area that typically sits at 8%. 100% of those dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.

area typical 8%MYSTIC VALLEY ELDER SERVICES: $570 → 8%0%20%40%50%more need →
grant to an above-average-need area below average· circle size = grant amount
How this is measured
Matched: human-services grants are those whose grantee’s IRS cause code is Human Services. Placed by people below the poverty line in the grantee’s ZIP, averaged from the tracts in that ZIP.
How this is measured
US grants placed by each grantee’s ZIP, which can differ from where services are delivered. Need from public data (U.S. Census/ACS, CDC PLACES, Eviction Lab, USDA), shown as context about the area, never attributed to the funder’s giving.
03Its grantees
repeat funding

Who it funds again

Organizations funded in more than one year, against those funded once.

96%of every dollar goes to organizations it has funded before.
$3.0M · 10 repeat orgs$126k to everyone else

10 repeat relationships: 6 still active in FY2026, 4 since wound down; 1 grantees were first funded in FY2026 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

10
3

Total granted

$3.0M
$16k

Median revenue growth · since first grant

+36%
+97%

Still filing today

60%
67%

New vs renewed · share of each year

In FY2026, 73% of grant dollars renewed an existing relationship; $110k went to new ones.

50%100%’17’18’19’20’21’22’23’24’25’26
RenewedFirst-time

Where new relationships form · theme of each grantee’s first grant

’17’18’19’20’21’22’23’24’25’26
Arts & CultureEnvironmentHousing & ShelterHuman ServicesOther
How this is measured
First-time means a grantee’s first year in the filing window; renewed means funded in an earlier year too. The renewed share climbs naturally as a portfolio matures, so the signal is a year that bucks it (a wave of new grantees). The earliest year is left-censored: relationships that predate the data read as new. Theme is the grantee’s IRS cause.

Backed again, and grew

  • ISABELLA STEWART GARDNER MUSEUM INC
    9× · 2017–2026 · $868k · revenue +117%
  • NV
    Norwell Visiting Nurse Association Inc
    3× · 2017–2026 · $283k · revenue +114%
  • THE TRUSTEES OF RESERVATIONS
    3× · 2019–2021 · $150k · revenue +36%

Funded once

  • HALEY HOUSE INC & AFFILIATESgraduated
    one grant, 2021 · $8k · revenue +97%
  • SO
    SCHOOL OF THE MUSEUM OF FINE ARTS AT TUFTS UNIVERSITY
    one grant, 2019 · $8k
  • MV
    MYSTIC VALLEY AGING SERVICES INCgraduated
    one grant, 2021 · $570 · revenue +68%
How this is measured

Repeat means funded in two or more distinct years. Growth and survival are read from each grantee’s own subsequent IRS filings.

04Its field

Closest unfunded matches

The nonprofits that most resemble its grantees but are not funded by it, scored along the direction from the rest of the field toward the portfolio. A resemblance in what they say they do, not a recommendation.

1
Boston Architectural College

The bac is committed to provide excellence in design education grounded in practice and accessible to diverse communities.

—
2
New England Museum Association

New england museum association's mission is to connect a community engaged in learning, collaboration, and action to cultivate a better museum world.

—
3
Trustees of the Berkshire Museum

Bringing people together for experiences that spark creativity and innovative thinking by making inspiring educational connections among art, history, and natural science.

Arts & Culture
4
Boston Society of Architects

The boston society of architects (bsa/aia) exists to improve the quality of life for boston-area residents by championing innovation in the built environment. as a membership association, we achieve this mission in partnership with the bsa…

—
5
Massachusetts Health & Hospital Assoc Inc

To advance the health of individuals and communities by serving as the leading voice for all massachusetts hospitals and healthcare systems and to help them provide high quality, cost-effective and equitable patient care.

—
6
Bartlett Arboretum Association Inc

To cultivate and develop an expansive collection of trees, gardens, and plants for all to explore, enjoy and study; and to provide through education and stewardship, a greener, healthier, more beautiful environment.

Environment
7
Mass General Brigham Health Plan Inc

Mass general brigham health plan's mission is to promote the health and wellness of our members, and to help ensure equitable, affordbale health care for the diverse communities we serve.

Health
8
Native Plant Trust Inc

The organization's mission is to conserve and promote new england's native plants to ensure healthy, biologically diverse landscapes.

Environment
9
Metropolitan Waterworks Museum Inc

The mwm owns and operates the waterworks museum (the "museum"), including a community meeting room. the museum is a single condominium unit of the museum building condominium, one of separate condominium building regimes on the site. the…

Arts & Culture
10
Nantucket Historical Association

The nantucket historical association preserves and interprets the history of nantucket through its programs, collections, and properties, in order to promote the island's significance and foster an appreciation of it among all audiences.

Arts & Culture
11
National Academy of Design

The mission of the national academy of design is to promote the fine arts in america through exhibition and education.

Education
12
Massachusetts Higher Education Assistance Corporation

The organization's primary exempt purpose is to provide access to and conduct activities in furtherance of higher education.

—
How this is measured
The grantee most central to the portfolio’s shape is Mystic Valley Aging Services Inc; the most unlike its peers is Isabella Stewart Gardner Museum Inc. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
04the grantee network

8 grantees tracked through their own filings, 2017–2026.

Each grant beside the grantee’s revenue from every source, year by year.

How this is measured

Counted here: distinct organizations funded across 2017 to 2026, not grant rows in a single year, so this will not match the grant count on the cover. 8 of the 14 grantees resolved in that span have returns of their own we could reconcile.

Each grantee is resolved to its own IRS returns. Association, dated; never a causal claim.

0
Load-bearing (≥25% of a budget)
1
Early backer (in before they grew)
8/8
Grantees still filing
8/8
Grew since first funded

Where the money sits, by cause and then by grantee

NORWELL VISITING NURSE ASSOCIATION AND HOSPICE: $666,666 · OtherNORWELL VISITING NURSE ASSOCIATION AND HOSPICEIndividual grant recipient: $610,635 · OtherIndividual grant recipientNorwell Visiting Nurse Association Inc: $283,334 · OtherNorwell Visiting Nurse Association IncPROPRIETORS OF THE BOSTON ATHENEAUM: $110,000 · OtherPROPRIETORS OF THE BOSTON ATHENEAUMTRUSTEES OF TUFTS COLLEGE FBO SCHOOL OF THE MUSEUM OF FINE ARTS AT TUFTS: $92,500 · OtherBENEVOLENT FRATERNITY OF UNITARIAN CHURCHES: $80,000 · Other+2 more: $45,000 · OtherISABELLA STEWART GARDNER MUSEUM INC: $867,500 · Arts & CultureISABELLA STEWART GARDNER MUSEUM INCBOSTON ARTS ACADEMY FOUNDATION INC: $105,000 · Arts & CultureBOSTON ARTS ACADEMY FOUNDATION INCNEW BRITAIN MUSEUM OF AMERICAN ART INC: $85,000 · Arts & CultureNEW BRITAIN MUSEUM OF AMERICAN ART INCTHE TRUSTEES OF RESERVATIONS: $150,000 · EnvironmentHALEY HOUSE INC & AFFILIATES: $8,250 · Housing & ShelterMYSTIC VALLEY AGING SERVICES INC: $570 · Human Services
Other$1,888,135Arts & Culture$1,057,500Environment$150,000Housing & Shelter$8,250Human Services$570

Each grantee by its size and the funder’s share of it; top left is load-bearing

25%50%75%100%$10M$100Mgrantee revenue →↑ funder's share of their budgetISABELLA STEWART GARDNER MUSEUM INC: $867,500 over 9y, 0.7% of budgetNorwell Visiting Nurse Association Inc: $283,334 over 3y, 0.4% of budgetTHE TRUSTEES OF RESERVATIONS: $150,000 over 3y, 0.2% of budgetBOSTON ARTS ACADEMY FOUNDATION INC: $105,000 over 3y, 0.8% of budgetNEW BRITAIN MUSEUM OF AMERICAN ART INC: $85,000 over 3y, 0.8% of budgetBENEVOLENT FRATERNITY OF UNITARIAN CHURCHES: $80,000 over 3y, 1.4% of budgetHALEY HOUSE INC & AFFILIATES: $8,250 over 1y, 0.2% of budgetMYSTIC VALLEY AGING SERVICES INC: $570 over 1y, 0.0% of budget
Grantee by grantee: a decade per organization, before and after funding

A decade per grantee: revenue shaded, grants as bars, all rows on one timeline.

  • Who funds ISABELLA STEWART GARDNER MUSEUM INC ↗
  • Who funds Norwell Visiting Nurse Association Inc ↗
  • Who funds THE TRUSTEES OF RESERVATIONS ↗
  • Who funds BOSTON ARTS ACADEMY FOUNDATION INC ↗
  • Who funds NEW BRITAIN MUSEUM OF AMERICAN ART INC ↗
  • Who funds BENEVOLENT FRATERNITY OF UNITARIAN CHURCHES ↗
  • Who funds HALEY HOUSE INC & AFFILIATES ↗
  • Who funds MYSTIC VALLEY AGING SERVICES INC ↗

Co-funders

Grantmakers whose grantees overlap with this funder’s far more than size alone predicts. Closer means stronger alignment; arcs show where they also fund each other. Here they form a tightly interlocked group: most of these funders back each other's grantees too.

Fidelity Investments Charitable Gift FundMA6× affinity4 shared granteesties to 1 of 1Hover any node to trace its alignments.Compare side by side →

Open a dossier: Fidelity Investments Charitable Gift Fund · Amazonsmile Foundation

How this is measured
Affinity is a Gamma-Poisson posterior co-funding rate, re-centered on the typical rate, so thin evidence shrinks toward no signal. Overlap is association, not proof of shared intent.

How much its grantees rely on government

Each dot is one organization Polly Thayer Starr Charitable Trust Hemenway & Barnes LLP funds: left to right is the share of its income from government, bottom to top the share from Polly Thayer Starr Charitable Trust Hemenway & Barnes LLP. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 30%0%1%3%5%funder's share of their income ↑0%4%8%11%15%share of the org’s income from government →median 2%
  • New Britain Museum of American Art Inc: 7% of income from government
  • The Trustees of Reservations: 2% of income from government
  • Boston Arts Academy Foundation Inc: 0% of income from government
no gov moneyreceives it· size = income
3get no government money at all
2report government grants on their 990 we could not trace to a source (not plotted)
0rely on government for over half their income
⤢ axis zoomed · 0–15%
typical government reliance, FY20–25
How this is measured
Government income is each org’s traced federal awards (USASpending grants and contracts) plus state payments (open checkbooks) as a share of its total revenue (IRS Form 990); the self-reported government-grant line (990 line 1e) is carried for cross-check: a grantee that reports government grants we could not trace to a source is left off the chart rather than shown as receiving none. An association, not a claim that a grant caused the public funding. Coverage is precision-first, a floor rather than a census; state records exist for 9 states, so a grantee outside them shows no state figure (dimmed) rather than a false zero. Federal award amounts are obligations, which can span years, so a single-year share is indicative. 990 filings lag 12 to 24 months.
05Through Plinth

Warm introductions · Powered by PlinthPlus

How do I get to Polly Thayer Starr Charitable Trust Hemenway & Barnes LLP?

Find your warmest path to Polly Thayer Starr Charitable Trust Hemenway & Barnes LLP through trustees and officers whose names appear on both boards. Search for your organization and Plinth traces the shortest route it can evidence.

Each link is a name appearing on two organizations’ public IRS 990 filings, matched on that name and, where the filings support it, on location. A same-state match has geographic support, which is a second matching feature rather than confirmation that the two are one person; a cross-state one is the likeliest to be two people who share a name. Every hop shows its tier, low-confidence and distant paths are held back rather than guessed, and it is worth confirming the person before you use the introduction.

On method. Every financial figure here is read from IRS e-file XML, the funder’s own 990/990-PF, and from the multi-year returns of the 14 grantees we resolved, each linked to its source. Grantee outcomes are each organization’s own program-service reporting (Form 990, Part III), read as association with funding, never as caused by it. Low-confidence name matches are suppressed rather than guessed. How we build these →

How this is measured
Each figure carries one of six labels. Filed is what the funder reported on its return. Official is another government record about an organization, such as a federal award or a charity register, joined by name where no shared identifier exists. Resolved is an identity we worked out where the filing named a recipient without an EIN, kept only above a measured confidence threshold. Computed is arithmetic over those, like themes, portfolio clusters and co-funder strength. Context is a statistic about a place rather than about an organization, which is what the need overlay is: it describes the area a grantee’s address sits in, not where its work lands. Inferred is drawn by a model from text, like the partnerships read out of public news and organization websites. Each is labeled where it appears.

Generated from the IRS Form 990-PF e-file return for fiscal year 2026, released 2026. Filings run roughly 12 to 24 months behind; figures are dated accordingly.

Source object · view filing

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