| I A O'shaughnessy Foundation | $5.2M | 110 | $25K |
| I Am Mercy Foundation A/k/a I Am the Vine Foundation | $15M | 37 | $100K |
| I Could Do Great Things Foundation | $1.3M | 22 | $13K |
| I S Wong Foundation | $2.8M | 53 | $20K |
| I Waldbaum Family Foundation | $1.7M | 97 | $10K |
| IA GA Pine Level Fdn Non-direct | $1.1M | 31 | $20K |
| IA Lenoir Charitable Tr | $1.4M | 54 | $10K |
| Iac Charitable Foundation Inc | $2.4M | 154 | $10K |
| Iacocca Family Foundation | $1.7M | 5 | $364.8K |
| Ibc Foundation | $2.1M | 5 | $400K |
| Ibis Foundation of Arizona co Casey LeSueur Getz CPAs PLLC | $3M | 47 | $50K |
| Ibm International Foundation | $11.7M | 16 | $100K |
| Ida S Charlton Charity Fd Ua | $2M | 16 | $100K |
| Idaho Elks Rehab Hospital Inc | $6.5M | 11 | $25.5K |
| IDC Foundation Inc | $1.9M | 13 | $100K |
| Ideal Industries Foundation | $1.5M | 115 | $1.5K |
| Idealistic Cause Foundation | $1M | 59 | $20K |
| Idex Foundation | $3.8M | 18 | $15.1K |
| Idol Family Foundation | $1.3M | 19 | $10K |
| Idp Foundation Inc | $2.7M | 20 | $17.5K |
| If Foundation | $1.1M | 50 | $20K |
| Ifs Family Foundation Inc | $1.6M | 15 | $20K |
| Iger Bay Foundation | $5.7M | 70 | $22.5K |
| Ignite Cultural Solutions Foundation | $4.5M | 28 | $75.5K |
| Iherb Charitable Foundation | $4.5M | 14 | $230K |
| Iimi Inc | $1.4M | 14 | $100K |
| Ila & Dinesh Paliwal Foundation | $1.3M | 12 | $37.6K |
| Illinois Children's Healthcare Foundation | $6.1M | 42 | $125K |
| Illumina Corporate Foundation | $6.8M | 79 | $15K |
| The Ilsababy Foundation | $6.7M | 50 | $75K |
| Ima Foundation | $2.8M | 1,263 | $500 |
| Imaginable Futures Foundation | $44M | 126 | $200K |
| Imagine Learning Foundation | $1.2M | 24 | $50K |
| Imago Dei Fund C/o Berkshire Partners | $15.1M | 126 | $79.2K |
| Imc Chicago Charitable Foundation | $36.9M | 146 | $3K |
| The Imlay Foundation Inc | $28M | 466 | $25K |
| Immanuel Charitable Foundation | $1.6M | 9 | $50K |
| The Imperial Charitable Trust | $2.5M | 73 | $1.6K |
| Impetus Foundation | $22M | 129 | $25K |
| The Imus Ranch Inc | $2M | 17 | $100K |
| Ina B Bond Ashbourne Charitable Fund Inc | $3.8M | 10 | $175K |
| Inasmuch Foundation | $41.7M | 534 | $10K |
| Inavale Foundation Inc | $4M | 14 | $7.3K |
| Incyte Charitable Giving Foundation | $2.7M | 100 | $15K |
| Independence Blue Cross Foundation | $8.7M | 70 | $70K |
| Independence Foundation | $7.5M | 457 | $10K |
| Independence Public Media of Philadelphia Inc | $6.2M | 176 | $20K |
| Independent University Alumni Association at Lowell Inc | $3.5M | 5 | $150K |
| Indian Paintbrush Foundation | $102.9M | 19 | $350K |
| Indian Trail Charitable Foundation Inc | $1.8M | 99 | $1.2K |
| Indiana University Health Morgan Inc | $11.1M | 5 | $2.5K |
| Indigo Foundation | $3.9M | 13 | $250K |
| Indira Foundation | $3.6M | 58 | $30K |
| Infosys Foundation USA | $6.5M | 127 | $26.3K |
| The Inglesea Charitable Trust | $1.9M | 70 | $1K |
| Ingredion Charitable Foundation | $1.2M | 48 | $10K |
| Ingrid D Tauber Fund Inc | $1.3M | 14 | $25K |
| Inherent Foundation C/o Inherent Group | $1.6M | 22 | $21.2K |
| Inmaat Foundation C/o Presti & Naegele | $2.6M | 117 | $15K |
| Inner Spark Foundation | $1M | 41 | $10.3K |
| Inserra Family Foundation | $1M | 20 | $25K |
| Insita Group Ltd | $2M | 9 | $200K |
| Inspirational Giving | $1.9M | 73 | $19K |
| Inspired Investment Leadership | $1.1M | 13 | $50K |
| Institute for Aegean Prehistory C/o Millburn Ridgefield LLC | $3M | 35 | $10K |
| Institute for Follicular Lymphoma Innovation | $9M | 10 | $371.4K |
| The Institute for Technology in Health Care | $1.5M | 10 | $40.1K |
| Institution for Savings in Newburyport & Its Vicinity Charitable Foundation Inc | $4.7M | 340 | $2.5K |
| Intel Foundation | $44.4M | 13 | $1M |
| Interco Charitable Trust | $3.2M | 54 | $30K |
| Interledger Foundation | $1.5M | 13 | $30K |
| International Institute of Islamic Thought the Fairfax Institute | $12.7M | 37 | $50K |
| International Paper Company Foundation | $3.4M | 472 | $3.5K |
| The International Retinal Research Foundation Inc | $1.7M | 9 | $77.5K |
| Intrepid Philanthropy Foundation | $1.2M | 95 | $10K |
| Intrust Bank Charitable Tr | $1.9M | 54 | $22.5K |
| Intuitive Foundation | $12.6M | 104 | $51.8K |
| Investors Foundation Inc | $2.2M | 375 | $1.8K |
| Ion Bank Foundation Inc | $2M | 827 | $500 |
| Iowa West Foundation | $15.9M | 134 | $25K |
| Ippolito Charitable Foundation of Galveston | $1.5M | 99 | $10K |
| Iqair Foundation | $3.7M | 98 | $19.6K |
| Ir Tua Kd&ml Steadley Charitable | $3.7M | 35 | $50K |
| The Ira Decamp Foundation Xxxxx2009 | $9.1M | 121 | $70K |
| Ira S Barton Chessed Foundation Inc | $1.1M | 7 | $100K |
| Irene C Shea Foundation | $1.2M | 32 | $25K |
| Irene Ritter Foundation Attndavid Ritter | $1.1M | 106 | $5K |
| Irfan Kathwari Foundation Inc | $2.2M | 70 | $10K |
| Irions Foundation Inc | $1M | 61 | $5K |
| Iris & Saul Katz Family Foundation Inc | $2.9M | 47 | $3K |
| Iris and Junming Le Foundation | $1.8M | 11 | $31.6K |
| Irish Woods Foundation | $1.8M | 97 | $5K |
| Irvin F & Alice S Etscorn Charitable Foundation | $1.6M | 47 | $25K |
| Irvin Stern Foundation | $1.3M | 62 | $20K |
| Irvine Health Foundation | $3.5M | 13 | $50K |
| Irving & Dorothy Levy Family Foundation | $12.1M | 43 | $15K |
| Irving & Eleanor Jaffe Foundation Inc | $6.5M | 10 | $50K |
| Irving & Elizabeth Jensen Foundation | $1.4M | 5 | $10K |
| Irving & Marilyn Naiditch Family Foundation | $1.2M | 74 | $1.5K |
| The Irving and Phyllis Millstein Foundation for Animal Welfare Ltd | $1.5M | 33 | $40K |
| The Irving Harris Foundation | $22.1M | 337 | $25K |
| Irving I Stone Foundation | $2.5M | 66 | $10K |
| Irving S Gilmore Foundation | $29.4M | 414 | $25K |
| The Irwin and Ginny Edlavitch Foundation Inc | $1.3M | 37 | $10K |
| Irwin Family Foundation c/o Mr Robert W Lynch | $2.3M | 6 | $312.5K |
| Isa-maria & David Shoolman Family Founda | $1.1M | 55 | $20.3K |
| Isaac & Marjorie Gindi Foundation Inc | $1.7M | 311 | $1.9K |
| Isaac H Tuttle Fund | $1.2M | 23 | $30K |
| Isaacson Foundation | $4.3M | 44 | $50K |
| The Isabel Allende Foundation | $2.3M | 57 | $20K |
| The Isabel Foundation | $3.3M | 82 | $25K |
| Isabel James Lehto Foundation Inc | $1.1M | 26 | $40.5K |
| Isadore & Bertha Gudelsky Family Fnd Inc C/o Arnold & Porter Kaye Scholer Llp | $2.9M | 69 | $20K |
| Isaiah 5812 Foundation Inc | $2.2M | 31 | $30K |
| Isaiah 61 Foundation | $1.1M | 14 | $23.7K |
| The Isak and Rose Weinman Foundation Inc | $1.6M | 77 | $15K |
| The Isambard Kingdom Brunel Society of Na | $1.6M | 36 | $25K |
| The Isdell Family Foundation | $5.9M | 37 | $60K |
| Isermann Family Foundation Inc C/o Gene R Korf Esq | $1.4M | 64 | $15K |
| Ishbia Family Foundation Inc | $1.9M | 5 | $49.8K |
| Ishiyama Foundation | $4.2M | 65 | $10K |
| Isla Carroll Turner Friendship Trust | $1.5M | 73 | $10K |
| Island Foundation Inc | $2.1M | 169 | $10K |
| Island Outreach Foundation Inc | $2.7M | 77 | $10K |
| Islands Fund C/o John Munn | $16.2M | 81 | $70K |
| Isnardi Foundation | $2M | 27 | $48K |
| Israel Henry Beren Charitable Foundation Inc | $3.2M | 9 | $250K |
| Issa Family Foundation | $45.9M | 109 | $15K |
| The IV Fund | $7M | 102 | $25K |
| The Ivan Bowen Family Foundation | $3.5M | 27 | $100K |
| Ivan V Koulaieff Foundation | $1.8M | 13 | $115K |
| The Ivywood Foundation | $1.2M | 84 | $5K |