EIN 13-3354308

Robert David Lion Gardiner Foundation

IRS 501(c) type
501(c)(3)
Num. employees
0
Year formed
1985
Most recent tax filings
2025-12-01
Description
To educate and inform the general public in the State of New York, particularly in the area of the Town of Islip and more generally in Suffolk County, concerning the culture, art and tradition of the locality.
Total revenues
$12,341,558
2025
Total expenses
$6,039,694
2025
Total assets
$122,665,581
2025
Num. employees
0
2025

Program areas at Robert David Lion Gardiner Foundation

The Foundation's direct charitable activities consist of providing for scholarships and donations to educational facilities & other charitable organizations to educate and preserve the history and historical artifacts of long island, new york. The Foundation's purpose also includes education and information to the general public in the state of new york, particularly in the area of the town of islip and more generally in suffolk county, concerning the culture, art and tradition of the locality; to cultivate, foster and promote interest in, and understanding and appreciation of the societal heritage of the town of islip, particularly during the nineteenth century; to encourage and sponsor the creation and perpetuation by existing and future historical societies of collections and repositories of the deposit, collection and examination of documents and artifacts of various kinds of relevant to such heritage and traditions; and to sponsor and encourage the preservation, restoration and ex
The Foundation does not make any payments to individual beneficiaries within the meaning of reg. Sec.53.4949(g)-2

Grants made by Robert David Lion Gardiner Foundation

GranteeGrant descriptionAmount
Cold Spring Harbor Laboratory2023 Grant Payment 2 of 6$500,000
PBS Foundation2023 Grant Award Pymt 2 of 3$333,333
East End Seaport Museum and Marine Foundation2025 Gys and Grant Award$295,440
...and 59 more grants made totalling $3,223,138

Who funds Robert David Lion Gardiner Foundation

Grants from foundations and other nonprofits
GrantmakerDescriptionAmount
Cutchogue-New Suffolk HSTRCL CNCLHistoric Conservatio$14,032

Financials for Robert David Lion Gardiner Foundation

RevenuesFYE 12/2025
Total grants, contributions, etc.$0
Investment income and dividends$2,582,044
Net rental income$0
Net gain from sale of non-inventory assets$9,730,719
Gross sales of inventory$0
Miscellaneous revenues$28,795
Total revenues$12,341,558
Data update history
October 3, 2026
Posted financials
Added Form 990PF for fiscal year 2025
April 15, 2026
Used new vendors
Identified 1 new vendor, including
October 5, 2025
Posted financials
Added Form 990PF for fiscal year 2024
September 22, 2025
Used new vendors
Identified 1 new vendor, including
August 4, 2024
Posted financials
Added Form 990PF for fiscal year 2023
Nonprofit Types
Grantmaking organizationsPrivate foundationsPrivate operating foundationsArts, culture, and humanities nonprofitsCharities
Issues
Arts, cultural, and humanitiesHistory
Characteristics
Provides grantsPartially liquidatedState / local levelTax deductible donationsNo full-time employeesAccepts online donations
General information
Address
30 W Main St Suite 309
Riverhead, NY 11901
Metro area
New York-Newark-Jersey City, NY-NJ-PA
County
Suffolk County, NY
Website URL
rdlgfoundation.org/ 
Phone
(631) 594-3990
IRS details
EIN
13-3354308
Fiscal year end
December
Taxreturn type
Form 990-PF
Year formed
1985
Eligible to receive tax-deductible contributions (Pub 78)
Yes
Categorization
NTEE code, primary
A80: Historical Societies, Historical Preservation
NAICS code, primary
813211: Grantmaking Foundations
Parent/child status
Independent
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