| 2025 | Greater Washington Community Foundation | Cosmos Club Historic Preservation Foundation Washington, DC | A | $25,000 | paid | GENERAL SUPPORT | 202640449349302259 |
| 2025 | Donor Advised Charitable Giving Inc | Cosmos Club Historic Preservation Foundation Washington, DC | A | $7,375 | paid | ARTS, CULTURE & HUMANITIES | 202611199349300601 |
| 2025 | Robert and Susan Rosenbaum Foundation | Cosmos Club Historic Preservtion Foundation Washington, DC | C | $1,000 | paid | GENERAL | 202621349349100202 |
| 2025 | The Eacho Family Foundation C/O Walker Management | Cosmos Club Historic Preservation Washington, DC | C | $1,000 | paid | CHARITABLE | 202621359349103322 |
| 2025 | Harold Rubenstein Family Charitable Foundation | Cosmos Club Historic Preservation Fund Washington, DC | C | $1,000 | paid | MAINTAINS AND PRESERVES THE HISTORIC TOWNSEND HOUSE | 202621539349100502 |
| 2025 | Boer Family Foundation Inc | Cosmos Club Historic Preservation Fdn Washington, DC | B | $200 | paid | GENERAL | 202641599349100404 |
| 2024 | Donor Advised Charitable Giving Inc | Cosmos Club Historic Preservation Foundation Washington, DC | A | $10,900 | paid | ARTS, CULTURE & HUMANITIES | 202541069349300729 |
| 2024 | Fidelity Investments Charitable Gift Fund | Cosmos Club Historic Preservation Foundation Washington, DC | A | $7,150 | paid | For grant recipient's exempt purposes | 202521349349310887 |
| 2024 | John P Mcgovern Foundation | Cosmos Club Historic Preservation Foundation Washington, DC | B | $1,000 | paid | Preservation Fund | 202503019349101560 |
| 2024 | Harold Rubenstein Family Charitable Foundation | Cosmos Club Historic Preservation Fund Washington, DC | C | $1,000 | paid | MAINTAINS AND PRESERVES THE HISTORIC TOWNSEND HOUSE | 202502889349100140 |
| 2024 | Catalyst Foundation | Cosmos Club Historic Preservation Fund Washington, DC | C | $1,000 | paid | HISTORIC PRESERVATION | 202541369349100404 |
| 2024 | Robert and Susan Rosenbaum Fnd 4323005 | Cosmos Club Historic Preservtion Washington, DC | C | $500 | paid | GENERAL | 202501299349102740 |
| 2024 | The Principato Family Foundation Inc | Cosmos Club Historic Preservation Fund Washington, DC | C | $250 | paid | GENERAL GRANT | 202501409349100900 |
| 2024 | Buckley Family Endowment Inc | Cosmos Club Historic Preservation Foundation Washington, DC | B | $200 | paid | GENERAL CONTRIBUTION | 202533219349101698 |
| 2024 | Neilom Foundation Inc | Cosmos Club Historic Preservation Foundation Washington, DC | B | $135 | paid | TO SUPPORT GENERAL OPERATION | 202610569349100411 |
| 2023 | The Community Foundation Inc | Cosmos Club Historic Preservation Foundation Washington, DC | A | $15,000 | paid | COMMUNITY VIBRANCY | 202423179349306847 |
| 2023 | Schwab Charitable Fund | Cosmos Club Historic Preservation Foundation Washington, DC | A | $6,200 | paid | ARTS, CULTURE & HUMANITIES | 202411039349301716 |
| 2023 | John P Mcgovern Foundation | Cosmos Club Historic Preservation Foundation Washington, DC | B | $1,000 | paid | Preservation Fund | 202402819349100230 |
| 2023 | Hillery Charitable Trust | Cosmos Club Historical Preservation Wasington, DC | C | $1,000 | paid | TO PRESERVE THE TOWNSEND HOUSE AND IT'S HISTORIC SURROUNDINGS. | 202403199349106290 |
| 2023 | Robert and Susan Rosenbaum Fnd 4323005 | Cosmos Club Historic Preservtion Foundation Washinton, DC | C | $500 | paid | GENERAL | 202411359349101006 |
| 2023 | The Principato Family Foundation Inc Fka the Jerold J and Marjorie N Principa | Cosmos Club Historic Preservation Fund Washington, DC | C | $250 | paid | GENERAL GRANT | 202411459349100311 |
| 2023 | Buckley Family Endowment Inc | Cosmos Club Historic Preservation Foundation Washington, DC | B | $200 | paid | GENERAL CONTRIBUTION | 202403209349103315 |
| 2022 | Fidelity Investments Charitable Gift Fund | Cosmos Club Historic Preservation Foundation Washington, DC | A | $31,950 | paid | For grant recipient's exempt purposes | 202430459349302913 |
| 2022 | Fidelity Investments Charitable Gift Fund | Winchester Community Music School Trust Winchester, MA | A | $31,950 | paid | For grant recipient's exempt purposes | 202321309349304807 |
| 2022 | Schwab Charitable Fund | Cosmos Club Historic Preservation Foundation Washington, DC | A | $30,700 | paid | ARTS, CULTURE & HUMANITIES | 202330939349300403 |
| 2022 | Robert and Susan Rosenbaum Fnd 4323005 | Cosmos Club Historic Preservtion Foundation Washinton, DC | C | $1,000 | paid | GENERAL | 202302089349100400 |
| 2022 | John P Mcgovern Foundation | Cosmos Club Historic Preservation Foundation Washington, DC | B | $1,000 | paid | Preservation Fund | 202322569349101122 |
| 2022 | Catalyst Foundation | Cosmos Club Historic Preservation Fund Washington, DC | C | $1,000 | paid | HISTORIC PRESERVATION | 202313179349103221 |
| 2022 | The Principato Family Foundation Inc Fka the Jerold J and Marjorie N Principa | Cosmos Club Historic Preservation Fund Washington, DC | C | $250 | paid | GENERAL GRANT | 202340839349100209 |
| 2022 | Buckley Family Endowment Inc | Cosmos Club Historic Preservation Foundation Washington, DC | B | $200 | paid | GENERAL CONTRIBUTION | 202323199349100742 |
| 2022 | Neilom Foundation Inc C/O Davinder K Anand | Cosmos Club Historic Preservation Foundation Washington, DC | B | $125 | paid | TO SUPPORT THE PRESERVATION OF TOWNSEND HOUSE | 202332589349101008 |
| 2021 | Fidelity Investments Charitable Gift Fund | Cosmos Club Historic Preservation Foundation Washington, DC | A | $8,330 | paid | For grant recipient's exempt purposes | 202221339349302787 |
| 2021 | Schwab Charitable Fund | Cosmos Club Historic Preservation Foundation Washington, DC | A | $6,200 | paid | ARTS, CULTURE & HUMANITIES | 202230499349301028 |
| 2021 | Robert and Susan Rosenbaum Foundation | Cosmos Club Historic Preservation Foundation Washington, DC | B | $1,000 | paid | TO FULLFILL FOUNDATION MISSION | 202200819349100145 |
| 2021 | The Jerold J and Marjorie N Principato Foundation Inc | Cosmos Club Historic Preservation Fund Washington, DC | C | $250 | paid | GENERAL GRANT | 202201369349101530 |
| 2021 | Buckley Family Endowment Inc | Cosmos Club Historic Preservation Foundation Washington, DC | B | $200 | paid | GENERAL CONTRIBUTION | 202241339349103389 |
| 2020 | Fidelity Investments Charitable Gift Fund | Cosmos Club Historic Preservation Foundation Washington, DC | A | $56,250 | paid | For grant recipient's exempt purposes | 202121359349300427 |
| 2020 | Catalyst Foundation | Cosmos Club Historic Preservation Fund Washington, DC | C | $1,000 | paid | HISTORIC PRESERVATION | 202113199349107996 |
| 2020 | John P Mcgovern Foundation | Cosmos Club Historic Preservation Foundation Washington, DC | B | $1,000 | paid | PROGRAM SUPPORT | 202320629349100202 |
| 2020 | John P Mcgovern Foundation | Cosmos Club Historic Preservation Foundation Washington, DC | B | $1,000 | paid | PROGRAM SUPPORT | 202133129349101133 |
| 2020 | Robert and Susan Rosenbaum Foundation | Cosmos Club Historic Preservation Washington, DC | C | $1,000 | paid | Same as Above | 202120769349100122 |
| 2020 | The Jerold J and Marjorie N Principato Foundation Inc | Cosmos Club Historic Preservation Fund Washington, DC | C | $250 | paid | GENERAL GRANT | 202121169349100717 |
| 2020 | Buckley Family Endowment Inc | Cosmos Club Historic Preservation Foundation Washington, DC | B | $200 | paid | GENERAL CONTRIBUTION | 202133159349100613 |
| 2019 | Schwab Charitable Fund | Cosmos Club Historic Preservation Foundation Washington, DC | A | $10,600 | paid | ARTS, CULTURE & HUMANITIES | 202010489349300101 |
| 2019 | Harold Rubenstein Family Charitable Foundation | Cosmos Club Historic Preservation Fund Washington, DC | C | $1,000 | paid | MAINTAIN AND PRESERVE TOWNSEND HOUSE | 202021479349100997 |
| 2019 | Alan M & Mildred S Ravenal Foundation | Cosmos Club Historic Preservation Foundation Washington, DC | B | $500 | paid | CHARITABLE | 202000159349100305 |
| 2019 | The Jerold J and Marjorie N Principato Foundation Inc | Cosmos Club Historic Preservation Fund Washington, DC | C | $500 | paid | GENERAL GRANT | 202021089349100307 |
| 2018 | Harold Rubenstein Family Charitable Foundation | Cosmos Club Historic Preservation Fund Washington DC, DC | C | $11,000 | paid | MAINTAIN AND PRESERVE TOWNSEND HOUSE | 201911339349103671 |
| 2018 | The Hundt Family Foundation Inc | Cosmos Club Historic Preservation Washington, DC | C | $1,000 | paid | UNRESTRICTED | 201902469349100120 |
| 2018 | The Jerold J and Marjorie N Principato Foundation Inc | Cosmos Club Historic Preservation Fund Washington, DC | C | $500 | paid | GENERAL GRANT | 201901209349101350 |
| 2018 | Elwer Foundation Inc | Cosmos Club Historic Preservation Washington, DC | C | $250 | paid | Charity | 201900809349100200 |