- Revenue 2024
- $1,352,963
- Expenses 2024
- $738,930
Program services were 77.1% of total expenses calculated — Part IX's program-services column over total expenses, both as filed.
As filed
- Subsection
- 03
- NTEE code
- D340
- Classification
- 1200
- Street
- 443 VAN NOSTRAND AVE
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
TO MAINTAIN THE 150-ACRE PRESERVE AS A NATURAL SANCTUARY FOR PLANTS AND WILDLIFE IN OUR URBAN AREA AND AS A NATURE PRESERVE AVAILABLE TO THE PUBLIC FOR TRAIL WALKS, NATURE STUDY AND OTHER PASSIVE RECREATION.
Activities or mission (Part I)
TO ADVANCE THE CAUSE OF NATURE STUDY PROGRAMS IN AND ABOUT ENGLEWOOD, NEW JERSEY. FLAT ROCK BROOK DEALS WITH THE PROMOTION OF RECREATIONAL AND ENVIRONMENTAL EDUCATIONAL ACTIVITY AND PROVIDES INFORMATION LEADING TO THE PRESERVATION OF WILDLIFE. IN ADDITION, FLAT ROCK MANAGES 150 ACRES OF NATURE PRESERVE IN ENGLEWOOD, NEW JERSEY.
-
FLAT ROCK BROOK'S 150 ACRES OF FORESTED LAND IS A UNIQUE SANCTUARY IN A HIGHLY URBANIZED AREA. IT ACTS AS A REFUGE FOR PLANTS AND ANIMAL SPECIES IN AN AREA OTHERWISE LACKING AN ABUNDANCE OF GREEN SPACES. AS STEWARDS OF THE LAND IT IS FLAT ROCK BROOK'S RESPONSIBILITY TO IMPLEMENT PRACTICAL AND EFFECTIVE CONSERVATION AND MANAGEMENT PROJECTS THAT ENSURE A BRIGHT FUTURE FOR THE LAND. ALL OF THESE PROJECTS AND INITIATIVES SHARE A SET OF GOALS; TO INCREASE AND CONSERVE BIODIVERSITY, INCREASE THE VIABILITY OF OUR FOREST AS WILDLIFE HABITAT, AND SUPPORT FOREST REGENERATION AND RE-GROWTH OF NATIVE VEGETATION.
Expenses $117,524 · Revenue $11,955
-
SUMMER NATURE DAY CAMP OFFERS HANDS-ON DISCOVERY AND ADVENTURE AND GAMES FOR CHILDREN.
Expenses $21,863 · Revenue $77,083
-
THROUGH CLASSROOM ACTIVITIES AND GUIDED NATURE HIKES, STUDENTS WILL HAVE REAL-WORLD EXPERIENCES IN NATURE TO SEE HOW THE ROCK CYCLE AND THE WATER CYCLE ARE CONNECTED AS WELL AS HOW CLIMATE CHANGE HAS AFFECTED BOTH OF THESE CYCLES. THESE CLASSES WLL HIKE TO AREAS SUCH AS OUR GLACIER ROCK TO LEARN HOW THE GLACIERS LEFT THEIR MARK, OUR STREAM TO SEE HOW THE WATER HAS ERODED THE ROCK AND STREAM BED, AS WELL AS OUR WETLAND AND ROCK QUARRY POND AREAS. ALL OF THE EDUCATION PROGRAMMING CONDUCTED THROUGH "EARTH'S ROCK AND WATER CYCLE CONNECTION" WILL AIM TO SUPPORT TEACHERS WITH THE NEW CLIMATE CHANGE CURRICULUM AS WELL AS ENHANCE THE SCIENCE AND NATURE WONDER OF STUDENTS.
Expenses $16,000 · Revenue $16,000
-
FLAT ROCK BROOK'S ONSITE AND OUTREACH PROGRAMS BRING NATURE INTO YOUR CLASSROOM. OUTREACH PROGRAMS ARE OFFERED TO SCHOOLS, HOUSES OF WORSHIP, CAMPS, LIBRARIES, SENIOR CENTERS, AND ANY OTHER GROUP THAT WOULD LIKE TO HAVE AN IMMERSIVE LEARNING EXPERIENCE. THE CLASSROOM-BASED OUTREACH PROGRAMS ARE DESIGNED TO INSPIRE RESPECT FOR NATURE.FLAT ROCK OFFERS ONE-HOUR GUIDED NATURE WALKS FOR GROUPS YEAR ROUND. THESE WALKS ARE AVAILABLE TO GROUPS OF CHILDREN FOUR YEARS OR OLDER, YOUTH GROUPS, ADULT GROUPS, AND GROUPS WITH SPECIAL NEEDS. WALKS FOLLOW THE TRAILS AND EXPLORE THE PLANTS AND ANIMALS OF THE POND, FOREST, AND FIELD HABITATS AS WELL AS SEASONAL CHANGES AT THE PRESERVE AND CAN BE CATERED TO THE SPECIFIC NEEDS AND INTERESTS OF EACH GROUP.WE OFFER FUN, NATURE-THEMED BIRTHDAY PARTIES FOR CHILDREN AGES 4 AND OLDER.
Expenses $414,288 · Revenue $26,750
As filed on the 2024 return. The filer continues this part on Schedule O, which is not shown here.
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.
-
Stephen WiessnerSTEPHEN WIESSNER
EXECUTIVE DIRECTOR
- Total calculated
- $108,882
- From this org
- $99,476
- From related orgs
- $0
- Other
- $9,406
- Hours/week
- 40
-
Omri AmarOMRI AMAR
TRUSTEE
- Total calculated
- $0
- Hours/week
- 2
-
Maria E AndreuMARIA E ANDREU
TRUSTEE
- Total calculated
- $0
- Hours/week
- 2
-
Melinda DeanMELINDA DEAN
TRUSTEE
- Total calculated
- $0
- Hours/week
- 2
-
Jacqueline GuttmanJACQUELINE GUTTMAN
TRUSTEE
- Total calculated
- $0
- Hours/week
- 2
-
Jared HararyJARED HARARY
TRUSTEE
- Total calculated
- $0
- Hours/week
- 2
-
Annette HollanderANNETTE HOLLANDER
TRUSTEE
- Total calculated
- $0
- Hours/week
- 2
-
Jennie KatsarosJENNIE KATSAROS
TRUSTEE
- Total calculated
- $0
- Hours/week
- 2
-
Kaya Kharibi-WhyteKAYA KHARIBI-WHYTE
TRUSTEE
- Total calculated
- $0
- Hours/week
- 2
-
Susan KlausnerSUSAN KLAUSNER
TRUSTEE
- Total calculated
- $0
- Hours/week
- 2
-
Omar LopezOMAR LOPEZ
TRUSTEE
- Total calculated
- $0
- Hours/week
- 2
-
Danielle NymanDANIELLE NYMAN
TRUSTEE
- Total calculated
- $0
- Hours/week
- 2
-
Michael PassowMICHAEL PASSOW
TRUSTEE
- Total calculated
- $0
- Hours/week
- 2
-
Henry Pruitt IIIHENRY PRUITT III
TRUSTEE
- Total calculated
- $0
- Hours/week
- 2
-
Scott ReddinSCOTT REDDIN
TRUSTEE
- Total calculated
- $0
- Hours/week
- 2
-
Sarah RussellSARAH RUSSELL
TRUSTEE
- Total calculated
- $0
- Hours/week
- 2
-
Louise SchwartzLOUISE SCHWARTZ
TRUSTEE
- Total calculated
- $0
- Hours/week
- 2
-
Talia ShulmanTALIA SHULMAN
TRUSTEE
- Total calculated
- $0
- Hours/week
- 2
-
Lena SungLENA SUNG
TRUSTEE
- Total calculated
- $0
- Hours/week
- 5
-
Lauren MitchellLAUREN MITCHELL
SECRETARY
- Total calculated
- $0
- Hours/week
- 5
-
Vasilios ZiangosVASILIOS ZIANGOS
TREASURER
- Total calculated
- $0
- Hours/week
- 5
-
Kathleen SilbersteinKATHLEEN SILBERSTEIN
1ST VICE PRESIDENT
- Total calculated
- $0
- Hours/week
- 5
-
Georgeann StaraceGEORGEANN STARACE
2ND VICE PRESIDENT
- Total calculated
- $0
- Hours/week
- 5
-
Chelsea GleisCHELSEA GLEIS
PRESIDENT
- Total calculated
- $0
- Hours/week
- 5
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
- $1,352,963
- Expenses
- $738,930
- Contributions
- $1,101,161
- Grants paid
- $0
-
2024
- Revenue
- $1,308,673
- Expenses
- $722,281
- Contributions
- $1,056,871
- Grants paid
- $0
-
2023
- Revenue
- $758,555
- Expenses
- $664,260
- Contributions
- $542,106
- Grants paid
- $0
-
2022
- Revenue
- $679,110
- Expenses
- $669,872
- Contributions
- $441,749
- Grants paid
- $0
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
- $596,976
- Expenses
- $693,283
- Assets (EOY)
- $1,459,499
-
2020 · 990
- Revenue
- $898,829
- Expenses
- $674,199
- Assets (EOY)
- $1,708,729
-
2019 · 990
- Revenue
- $563,169
- Expenses
- $639,500
- Assets (EOY)
- $1,402,379
-
2018 · 990
- Revenue
- $552,788
- Expenses
- $638,767
- Assets (EOY)
- $1,403,564
-
2017 · 990
- Revenue
- $775,574
- Expenses
- $662,860
- Assets (EOY)
- $1,465,790
-
2016 · 990
- Revenue
- $457,134
- Expenses
- $622,608
- Assets (EOY)
- $1,365,963
-
2015 · 990
- Revenue
- $565,414
- Expenses
- $626,075
- Assets (EOY)
- $1,481,619
-
2014 · 990
- Revenue
- $508,149
- Expenses
- $607,046
- Assets (EOY)
- $1,510,565
-
2013 · 990
- Revenue
- $497,889
- Expenses
- $615,329
- Assets (EOY)
- $1,677,595
-
2012 · 990
- Revenue
- not reported
- Expenses
- $654,653
- Assets (EOY)
- $1,712,595
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
No itemized grants to organizations. Schedule I is filed only by organizations that granted more than $5,000 to a recipient, so most filers have none.
Grants received
-
$44,282
2024 Contribution
-
2024 For grant recipient's exempt purposes
-
$22,500
2022 ANIMAL-RELATED
-
2023 For grant recipient's exempt purposes
-
2022 For grant recipient's exempt purposes
-
$10,000
2024 GENERAL SUPPORT
-
$7,000
2023 INTERNATIONAL
-
2024 GENERAL SUPPORT
-
$6,250
2024 IN FURTHERANCE OF GRANTEE'S TAX-EXEMPT PURPOSE
-
2024 ENVIRONMENTAL AND ANIMALS
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
-
501(C)(3) · OWNS THE LAND MANAGED BY FLAT ROCK BROOK NATURE ASSOCIATION. · NJ
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.