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
Who funds Robert David Lion Gardiner Foundation
Grants from foundations and other nonprofits
Financials for Robert David Lion Gardiner Foundation
| Revenues | FYE 12/2025 | FYE 12/2024 | % Change |
|---|
| Total grants, contributions, etc. | $0 | $0 | - |
| Investment income and dividends | $2,582,044 | $2,488,786 | 3.7% |
| Net rental income | $0 | $0 | - |
| Net gain from sale of non-inventory assets | $9,730,719 | $6,922,368 | 40.6% |
| Gross sales of inventory | $0 | $0 | - |
| Miscellaneous revenues | $28,795 | $66,750 | -56.9% |
| Total revenues | $12,341,558 | $9,477,904 | 30.2% |
Organizations like Robert David Lion Gardiner Foundation
| Organization | Type | Location | Revenue |
|---|
| Wisconsin Historical Foundation | 501(c)(3) | Madison, WI | $35,049,150 |
| Packard Humanities Institute (PHI) | 501(c)(3) | Los Altos, CA | $16,233,758 |
| Nebraska State Historical Society Foundation | 501(c)(3) | Lincoln, NE | $3,264,990 |
| The Pierre and Tana Matisse Foundation | 501(c)(3) | New York, NY | $10,799,446 |
| Willem De Kooning Foundation | 501(c)(3) | New York, NY | $4,149,338 |
| Idaho Heritage Trust Incorporated | 501(c)(3) | Boise, ID | $6,001,200 |
| The Lanier Theological Library Foundation | 501(c)(3) | Houston, TX | $29,872,747 |
| Berkowitz Contemporary Foundation | 501(c)(3) | South Miami, FL | $11,727,732 |
| Auschwitz-Birkenau Memorial Foundation | 501(c)(3) | New York, NY | $3,721,787 |
| Colorado Preservation | 501(c)(3) | Denver, CO | $3,123,972 |
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/Â
- 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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