- Revenue 2024
- $6,858,272
- Expenses 2024
- $3,655,960
Program services were 60.0% of total expenses calculated — Part IX's program-services column over total expenses, both as filed.
As filed
- Subsection
- 03
- NTEE code
- C30
- Classification
- 2000
- Street
- 1370 BROADWAY FL 5
These codes are the IRS's own and are shown exactly as filed. What each one means is in the Business Master File documentation (opens in a new tab).
Mission and programs · 2024
Mission
OSI PROTECTS LAND FOR CLEAN DRINKING WATER, PUBLIC RECREATION, HEALTHY COMMUNITIES, AND WILDLIFE HABITAT; AND TO CONSERVE INTACT FORESTS AND FLOODPLAINS THAT CAPTURE AND STORE CARBON AND PROTECT AGAINST INCREASINGLY DANGEROUS WEATHER EVENTS.
Activities or mission (Part I)
OSI AND ITS SUPPORTING ORGANIZATION, OPEN SPACE INSTITUTE LAND TRUST, PROTECTS LAND.
-
CONSERVATION COMMUNITIES: OPEN SPACE INSTITUTE, INC. (OSI) SUPPORTS GRASSROOTS ORGANIZATIONS AND PROMOTES THE DEVELOPMENT OF YOUNG ENVIRONMENTAL LEADERS WITHIN THE FIELD OF CONSERVATION. ITS CITIZEN ACTION PROGRAM SUPPORTS NEWLY FORMED LOCAL ENVIRONMENTAL GROUPS, 31 GROUPS IN 2024. THE MALCOLM GORDON CHARITABLE FUND AWARDS GRANTS TO NONPROFITS WITHIN THE HUDSON VALLEY REGION AND PROVIDED NINE GRANTS IN 2024. WHILE THE GEOGRAPHIC AND MISSION ALIGNED BARNABAS MCHENRY HUDSON RIVER VALLEY AWARDS PROGRAM PROVIDES GRANTS TO STUDENTS WHO ARE ACTIVELY WORKING TO IMPROVE THEIR LOCAL COMMUNITIES AND LOCAL COMMUNITIES, SIX GRANTS WERE AWARDED IN 2024. LIKEWISE, OSI'S CONSERVATION FELLOWSHIP ENCOURAGES YOUNG LEADERS TO PURSUE CAREERS IN CONSERVATION.
Expenses $2,119,912 · Grants $515,523 · Revenue $360,080
-
THROUGH ITS SUPPORTING ORGANIZATION, THE OPEN SPACE INSTITUTE LAND TRUST (OSILT), OSI SAVES LAND TO PROTECT WATER SOURCES; CREATE AND MAKE PUBLIC LAND MORE INVITING FOR ALL; MAINTAIN HEALTHY FORESTS; MITIGATE THE EFFECTS OF EXTREME WEATHER; PROVIDE WILDLIFE HABITAT; AND STRENGTHEN COMMUNITIES. WORKING ACROSS THE EASTERN UNITED STATES, OSILT ACHIEVES THESE GOALS THROUGH FACILITATED LARGE-SCALE CONSERVATION PROJECTS; DIRECT ACQUISITION AND CONSERVATION EASEMENTS; AND GRANTS AND LOANS. IN 2024, OSILT PROTECTED 12,084 ACRES WITH A FAIR MARKET VALUE OF $80.59 MILLION AND MADE 23 CAPITAL GRANTS TOTALING $3.7 MILLION, PROTECTING 6,878 ACRES IN SEVEN STATES WITH A FAIR MARKET VALUE OF $37.9 MILLION. FURTHER, OSI DIRECTLY APPROVED EIGHT GRANTS FOR CONSERVATION PLANNING TOTALING $109,275.
Expenses $72,292 · Grants $72,292
-
Revenue $3,065
As filed on the 2024 return.
Officers and directors · 2024
As listed in Part VII of the 2024 return, in the order the filer printed them. Each return names its own; this is not a roster the organization keeps with us.
-
Amelia SalzmanAMELIA SALZMAN
CO-CHAIRPERSON OF THE BOARD
- Total calculated
- $0
- Hours/week
- 3 + 3 related
-
Anson FrelinghuysenANSON FRELINGHUYSEN
MEMBER
- Total calculated
- $0
- Hours/week
- 1 + 1 related
-
Carol AshCAROL ASH
VICE-CHAIRPERSON OF THE BOARD
- Total calculated
- $0
- Hours/week
- 1 + 1 related
-
Carolyn NiemczykCAROLYN NIEMCZYK
MEMBER
- Total calculated
- $0
- Hours/week
- 1 + 1 related
-
Dale S BrykDALE S BRYK
MEMBER
- Total calculated
- $0
- Hours/week
- 1 + 1 related
-
Douglas BatesonDOUGLAS BATESON
MEMBER
- Total calculated
- $0
- Hours/week
- 1 + 1 related
-
Elizabeth BordenELIZABETH BORDEN
MEMBER
- Total calculated
- $0
- Hours/week
- 1 + 1 related
-
Gigi MortimerGIGI MORTIMER
MEMBER
- Total calculated
- $0
- Hours/week
- 1 + 1 related
-
Giorgios VlamisGIORGIOS VLAMIS
MEMBER
- Total calculated
- $0
- Hours/week
- 1 + 1 related
-
Holly HegenerHOLLY HEGENER
MEMBER
- Total calculated
- $0
- Hours/week
- 1 + 1 related
-
Hume R SteyerHUME R STEYER
SECRETARY
- Total calculated
- $0
- Hours/week
- 1 + 1 related
-
John ErnstJOHN ERNST
MEMBER
- Total calculated
- $0
- Hours/week
- 1 + 1 related
-
John H AdamsJOHN H ADAMS
CO-CHAIR OF THE BOARD (OUTGOING)
- Total calculated
- $0
- Hours/week
- 3 + 3 related
-
John P CahillJOHN P CAHILL
MEMBER
- Total calculated
- $0
- Hours/week
- 1 + 1 related
-
Joshua Ginsberg PhDJOSHUA GINSBERG PHD
MEMBER
- Total calculated
- $0
- Hours/week
- 1 + 1 related
-
Jude Wu AbelJUDE WU ABEL
MEMBER
- Total calculated
- $0
- Hours/week
- 1 + 1 related
-
Katherine O RobertsKATHERINE O ROBERTS
MEMBER
- Total calculated
- $0
- Hours/week
- 1 + 1 related
-
Lea Paine HighetLEA PAINE HIGHET
MEMBER
- Total calculated
- $0
- Hours/week
- 1 + 1 related
-
Leisle LinLEISLE LIN
MEMBER
- Total calculated
- $0
- Hours/week
- 1 + 1 related
-
Marjorie Van DercookMARJORIE VAN DERCOOK
MEMBER
- Total calculated
- $0
- Hours/week
- 1 + 1 related
-
Nicole Hylton-PattersonNICOLE HYLTON-PATTERSON
MEMBER
- Total calculated
- $0
- Hours/week
- 1 + 1 related
-
Patricia F SullivanPATRICIA F SULLIVAN
MEMBER
- Total calculated
- $0
- Hours/week
- 1 + 1 related
-
Richard RemmerRICHARD REMMER
MEMBER
- Total calculated
- $0
- Hours/week
- 1 + 1 related
-
Samuel G HuberSAMUEL G HUBER
MEMBER
- Total calculated
- $0
- Hours/week
- 1 + 1 related
-
Susan BabcockSUSAN BABCOCK
MEMBER
- Total calculated
- $0
- Hours/week
- 1 + 1 related
The first 25 listed. Compensation is as filed in Part VII: reportable pay from this organization and from related organizations, other compensation, and hours per week. The total, marked calculated, is our sum of the three dollar columns, with a blank column counted as $0; the form itself has no total. On a Form 990-EZ the columns are Part IV's instead, and on a Form 990-PF Part VIII's — compensation, contributions to benefit plans, and expense account — and the total sums those. Earlier years are each on their own filing page.
Filings
-
2024
- Revenue
- $6,858,272
- Expenses
- $3,655,960
- Contributions
- $6,172,466
- Grants paid
- $587,815
-
2023
- Revenue
- $5,880,714
- Expenses
- $6,178,116
- Contributions
- $5,213,964
- Grants paid
- $3,306,124
-
2022
- Revenue
- $2,141,539
- Expenses
- $1,715,812
- Contributions
- $1,748,589
- Grants paid
- $249,047
The four totals the IRS asks for on Part I of the Form 990, as filed. A dash means the figure was not present on the return — not that it was zero.
Other returns filed
-
2021 · 990
- Revenue
- $2,250,549
- Expenses
- $1,173,337
- Assets (EOY)
- $10,587,684
-
2020 · 990
- Revenue
- $1,729,129
- Expenses
- $2,044,377
- Assets (EOY)
- $8,735,707
-
2019 · 990
- Revenue
- $2,935,219
- Expenses
- $2,298,776
- Assets (EOY)
- $9,076,469
-
2018 · 990
- Revenue
- $3,908,202
- Expenses
- $2,465,419
- Assets (EOY)
- $7,853,848
-
2017 · 990
- Revenue
- $2,147,064
- Expenses
- $959,520
- Assets (EOY)
- $7,037,256
-
2016 · 990
- Revenue
- $1,097,397
- Expenses
- $1,105,214
- Assets (EOY)
- $5,939,594
-
2015 · 990
- Revenue
- $1,042,294
- Expenses
- $1,172,849
- Assets (EOY)
- $5,828,397
-
2014 · 990
- Revenue
- $2,154,957
- Expenses
- $2,713,528
- Assets (EOY)
- $5,383,971
-
2013 · 990
- Revenue
- $4,801,961
- Expenses
- $6,812,598
- Assets (EOY)
- $5,983,243
-
2012 · 990
- Revenue
- not reported
- Expenses
- $4,687,898
- Assets (EOY)
- $9,867,611
Nonprofiteer parses Forms 990, 990-EZ and 990-PF, in a window of recent tax years. These returns are recorded from the IRS e-file index, so their figures were extracted by that index rather than read from the return here — treat them as a different source from the filings above, not as more of the same record. A dash means the index carries no figure; Form 990-T listings carry none at all. Showing the 10 most recent; the API carries the rest.
Grants made
-
OPEN SPACE INSTITUTE LAND TRUST INC
$3,000,000
2023 LAND ACQUISITION PROGRAMS AND PURPOSES
-
$356,374
2024 CITIZEN ACTION PROGRAM
-
BEAVERKILL VALLEY LAND TRUST INC
$72,292
2024 STEWARDSHIP
-
BEAVERKILL VALLEY LAND TRUST INC
$70,000
2022 STEWARDSHIP
-
BEAVERKILL VALLEY LAND TRUST INC
$66,477
2023 STEWARDSHIP
-
CENTER ON MODERNITY IN TRANSITION
$62,130
2023 CITIZEN ACTION PROGRAM
-
RELATO AGENCY LLC
$61,939
2023 CITIZEN ACTION PROGRAM
-
ADDISON BLAKEMORE DBA TWO EVERGREEN MACHINE LLC
$55,869
2022 CITIZEN ACTION PROGRAM
-
THE RELATO AGENCY LLC
$29,219
2024 CITIZEN ACTION PROGRAM
-
HARBORLAB INC
$20,681
2022 CITIZEN ACTION PROGRAM
The 10 largest by cash amount. The API serves every itemized grant.
Grants received
-
$4,813,408
2023 EDUCATION
-
DONOR ADVISED CHARITABLE GIVING
$217,110
2023 ENVIRONMENTAL AND ANIMALS
-
2023 For grant recipient's exempt purposes
-
DONOR ADVISED CHARITABLE GIVING
$134,425
2024 ENVIRONMENTAL AND ANIMALS
-
2024 GENERAL OPERATING SUPPORT
-
2023 STEWARDSHIP
-
2024 For grant recipient's exempt purposes
-
2022 For grant recipient's exempt purposes
-
LAND TRUST ALLIANCE INCORPORATED
$82,000
2024 CAPACITY BUILDING
-
2023 GENERAL SUPPORET
The 10 largest by cash amount. The API serves every itemized grant.
Related organizations
From Schedule R Part II, where a filer lists the tax-exempt organizations it is related to by control. It does not record shared board members or money.
Declared on its 2024 return
-
OPEN SPACE INSTITUTE LAND TRUST INC
501(C)(3) · LAND CONSERVATION · NY · controlled entity
Declared as related by
-
OPEN SPACE INSTITUTE LAND TRUST INC
On its 2024 return
Taxable family
From Schedule R Parts I, III and IV: entities that legally are the filer, and taxable partnerships, corporations and trusts it is related to. These record ownership and control, not shared board members or money.
Related partnerships on its 2024 return
-
STRATEGIC CONSERVATION PARTNERS LLC
CONSERVATION LAND INVESTMENTS · NY
Other IRS files
Auto-Revocation List
Not listed. The IRS publishes this list for organizations whose exemption was automatically revoked for failing to file for three consecutive years.
Publication 78
Listed as of 13 October 2026, under deductibility PC.
These are two separate IRS files on two separate schedules, shown as published and not reconciled with each other. Neither is a statement about whether a contribution is deductible today: 19,245 organizations appear in Publication 78 while the IRS's own revocation file lists them as currently revoked, more than half of those revoked before 2019. Absence from Publication 78 is evidence of nothing, and presence is not evidence either. Verify current status with the IRS before relying on it.
What this page reflects
The registration facts above come from the IRS Business Master File published 13 October 2026 and read 1 November 2026, for every organization at once. Returns through tax year 2024, the newest we have parsed for this organization.