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South Carolina · Private foundation

Henry M Blackmer Foundation Inc

Its FY2025 filing reports that it funds preselected organizations and did not take unsolicited requests; check the foundation's own site before ruling it out.

$180k
Granted FY2025(still arriving)
12
Grants FY2025
10
Organizations funded FY2024
0%
First-time grantees FY2024
Read the full brief
Median grant, FY2025
$10,000
Largest grant, FY2025
$95,000
Organizations funded a year
10 to 14
FY2018 to FY2024
States reached, FY2025
3
Total assets, FY2025
$2.3M
Applications
Preselected organizations only
Per its most recent filing; check its own site

How open it is to new grantees

In FY2024, 0% of the organizations Henry M Blackmer Foundation Inc funded were first-time grantees, receiving 0% of its grant dollars.

New vs renewed · share of each year

In FY2024, 100% of grant dollars renewed an existing relationship; $0 went to new ones.

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

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

’18’19’20’21’22’23’24
EnvironmentRecreation & SportsOther
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.
The numbers by year
Fiscal yearOrganizations fundedTo those organizationsFirst-time grantees
FY2025still arriving11$170k27%
FY202410$136k0%
FY202311$129k0%
FY202214$139k7%
FY202113$133k8%
FY202014$134k14%
FY201914$172k7%
FY201813$128k0%
93% classified

What it funded, over time

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

Environment$583kReligion$271kHealth$185kPhilanthropy$75kEducation$58kArts & Culture$38kAnimals$12kRecreation & Sports$11kOther$0

Top grantees

Largest recipients by total granted, FY2017 to FY2025, and the share of each one’s budget the grants supplied at peak.

GranteeTotal grantedYearsShare of their budget
Lowcountry Land Trust Inc$351,00093%
Charleston Area Therapeutic Riding Inc$150,00095%
South Carolina Environmental Law Project Inc$105,00091%
Academy of Mount Saint Ursula$45,0003n/a
Roper St Francis Foundation$35,00090%
Charleston Symphony Orchestra$28,00060%
National Audubon Society Inc$12,00040%
Charleston Moves$11,00061%
The Preservation Society of Charleston Inc$10,00030%
Grace Episcopal Church$10,0001n/a
Show all 14 grantees
All grantees of Henry M Blackmer Foundation Inc by total granted
GranteeTotal grantedYearsShare of their budget
Lowcountry Land Trust Inc$351,00093%
Charleston Area Therapeutic Riding Inc$150,00095%
South Carolina Environmental Law Project Inc$105,00091%
Academy of Mount Saint Ursula$45,0003n/a
Roper St Francis Foundation$35,00090%
Charleston Symphony Orchestra$28,00060%
National Audubon Society Inc$12,00040%
Charleston Moves$11,00061%
The Preservation Society of Charleston Inc$10,00030%
Grace Episcopal Church$10,0001n/a
Open Space Institute Inc$9,00050%
Southern Environmental Law Center$8,00010%
Cherry Hills Land Preserve Inc$8,00022%
Lord Berkeley Conservation Trust$50010%

What it could do for these grantees

Plus 7 recipients with no EIN on record ($458k), not named here.

Where it is load-bearing

Each grantee by its size and the share of its budget Henry M Blackmer Foundation Inc supplied at peak.

25%50%75%100%$1.0M$10M$100Mgrantee revenue →↑ funder's share of their budgetLowcountry Land Trust Inc: $351,000 over 9y, 2.6% of budgetCharleston Area Therapeutic Riding Inc: $150,000 over 9y, 4.6% of budgetSouth Carolina Environmental Law Project Inc: $105,000 over 9y, 1.3% of budgetRoper St Francis Foundation: $35,000 over 9y, 0.1% of budgetCharleston Symphony Orchestra: $28,000 over 6y, 0.1% of budgetNational Audubon Society Inc: $12,000 over 4y, 0.0% of budgetCharleston Moves: $11,000 over 6y, 1.0% of budgetThe Preservation Society of Charleston Inc: $10,000 over 3y, 0.1% of budgetOpen Space Institute Inc: $9,000 over 5y, 0.1% of budgetSouthern Environmental Law Center: $8,000 over 1y, 0.0% of budgetCherry Hills Land Preserve Inc: $8,000 over 2y, 2.3% of budgetLord Berkeley Conservation Trust: $500 over 1y, 0.1% of budget

Tap a dot to name the grantee.

How this is measured
Share of budget is the funder’s grant in a year over the grantee’s total revenue that year, at its highest across the years we hold; revenue is from all sources. Only grantees confirmed against their own filings, whose grants do not exceed their revenue, are plotted: the largest 12.

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.

Coastal Community Foundation of South Carolina IncSC21.8× affinity8 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: Coastal Community Foundation of South Carolina Inc · Post and Courier Foundation · Henry & Sylvia Yaschik Foundation Inc · The Joanna Foundation · Gaylord and Dorothy Donnelley Foundation · Atlantic Services of Charleston Cha · Pathfinder Foundation Inc · Speedwell Foundation · The Ceres Foundation Inc · Dominion Energy Charitable Foundation · The Ayco Charitable Foundation · American Endowment 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.

Compare Henry M Blackmer Foundation Inc with peer funders

Warm introductions · Powered by PlinthPlus

How do I get to Henry M Blackmer Foundation Inc?

Find your warmest path to Henry M Blackmer Foundation Inc 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.

About Henry M Blackmer Foundation Inc

How much does Henry M Blackmer Foundation Inc give?
Henry M Blackmer Foundation Inc reported 12 grants totaling $180,000 in its FY2025 IRS filing. It funded between 10 and 14 organizations a year over FY2018 to FY2024.
What does Henry M Blackmer Foundation Inc fund?
By grant dollars over FY2017 to FY2025, its largest causes are Environment (44%), Religion (21%), Health (14%).
Who are Henry M Blackmer Foundation Inc's largest grantees?
By total granted over FY2017 to FY2025: Lowcountry Land Trust Inc ($351k), Charleston Area Therapeutic Riding Inc ($150k), South Carolina Environmental Law Project Inc ($105k).
Does Henry M Blackmer Foundation Inc fund new organizations?
In FY2024, 0% of the organizations it funded were first-time grantees.
Does Henry M Blackmer Foundation Inc accept unsolicited applications?
Its most recent filing reports that it funds preselected organizations and does not take unsolicited requests. Check the foundation's own site before ruling it out.
Which funders back the same organizations as Henry M Blackmer Foundation Inc?
Its strongest co-funders, measured against what their size predicts, include Coastal Community Foundation of South Carolina Inc, Post and Courier Foundation, Henry & Sylvia Yaschik Foundation Inc.
Where is Henry M Blackmer Foundation Inc based?
Henry M Blackmer Foundation Inc is based in SC.

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 22 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 2025, released 2025. Filings run roughly 12 to 24 months behind; figures are dated accordingly.

Source object · view filing

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