| BRING RecyclingEIN 23-7137120 | Environment | OR | $1,135,788Small | 91.90 |
| Bris AvrohomEIN 22-2664361 | Religion | NJ | $1,226,967Small | 71.71 |
| Broad Street MinistryEIN 20-2760310 | Human Services | PA | $2,680,064Small | 89.86 |
| Broadway Cares/Equity Fights AIDSEIN 13-3458820 | Health | NY | $22,604,203Large | 81.84 |
| Brooklyn Academy of MusicEIN 11-2201344 | Arts, Culture, Humanities | NY | $51,562,831Large | 85.15 |
| Brooklyn Botanic GardenEIN 11-2417338 | Environment | NY | $22,441,961Large | 93.86 |
| Brooklyn Historical SocietyEIN 11-1630813 | Arts, Culture, Humanities | NY | $5,401,797Mid-sized | 85.87 |
| Brooklyn MuseumEIN 11-1672743 | Arts, Culture, Humanities | NY | $43,855,989Large | 87.89 |
| Brooklyn Teen ChallengeEIN 11-2510315 | Health | NY | $1,436,310Small | 78.31 |
| Brooklyn Youth Chorus AcademyEIN 11-3129249 | Education | NY | $2,640,431Small | 89.77 |
| Brookwood FloridaEIN 59-0624387 | Human Services | FL | $1,491,276Small | 91.05 |
| Broome County Council of ChurchesEIN 15-0547374 | Human Services | NY | $4,822,734Mid-sized | 92.74 |
| Brother's Brother FoundationEIN 34-6562544 | International | PA | $119,695,345Large | 92.92 |
| Brown County United WayEIN 39-0806299 | Community Development | WI | $4,380,293Mid-sized | 89.90 |
| Bruce MuseumEIN 23-7105904 | Arts, Culture, Humanities | CT | $5,670,884Mid-sized | 91.41 |
| Bryan's HouseEIN 75-2217559 | Health | TX | $2,050,917Small | 85.57 |
| Bryan/College Station Habitat for HumanityEIN 74-2542417 | Community Development | TX | $2,610,273Small | 92.87 |
| Bryn Mawr Film InstituteEIN 04-3682610 | Arts, Culture, Humanities | PA | $2,922,165Small | 87.29 |
| BsideU For Life Pregnancy & Life Skills CenterEIN 61-1142823 | Health | KY | $1,340,606Small | 80.18 |
| Bucks County SPCAEIN 23-1365196 | Animals | PA | $2,042,217Small | 91.66 |
| Buffalo Bayou PartnershipEIN 76-0183954 | Environment | TX | $5,366,711Mid-sized | 96.66 |
| Buffalo Bill Center of the WestEIN 83-0180403 | Arts, Culture, Humanities | WY | $12,651,943Mid-sized | 91.69 |
| Buffalo City MissionEIN 16-0743965 | Human Services | NY | $8,709,233Mid-sized | 78.72 |
| Buffalo Philharmonic OrchestraEIN 16-0755739 | Arts, Culture, Humanities | NY | $11,854,256Mid-sized | 75.15 |
| BUILD (Businesses United in Investing, Lending & Development)EIN 94-3386695 | Education | CA | $13,514,301Large | 82.94 |
| BUILD, Inc.EIN 23-7022085 | Human Services | IL | $2,698,597Small | 93.96 |
| Building ChangesEIN 91-1410450 | Human Services | WA | $6,478,654Mid-sized | 86.84 |
| Building Goodness FoundationEIN 54-1956136 | Community Development | VA | $2,098,192Small | 93.83 |
| Building Homes for HeroesEIN 20-4540852 | Human Services | NY | $11,604,904Mid-sized | 96.46 |
| buildOnEIN 22-3128648 | International | CT | $15,454,830Large | 93.73 |
| Burn InstituteEIN 23-7260718 | Health | CA | $1,287,313Small | 98.17 |
| Business Executives for National SecurityEIN 52-1271179 | Research and Public Policy | DC | $5,840,585Mid-sized | 91.72 |
| Business Volunteers UnlimitedEIN 34-1724581 | Community Development | OH | $2,178,270Small | 86.70 |
| Butler County United WayEIN 31-0734490 | Community Development | OH | $1,798,027Small | 80.83 |
| Butler Institute of American ArtEIN 34-0748495 | Arts, Culture, Humanities | OH | $2,888,969Small | 84.64 |
| Butte Humane SocietyEIN 94-1580621 | Animals | CA | $1,225,114Small | 70.07 |
| Buzzards Bay CoalitionEIN 04-2971978 | Environment | MA | $5,263,968Mid-sized | 91.87 |
| Byrd Hoffman Water Mill FoundationEIN 13-4144013 | Arts, Culture, Humanities | NY | $4,627,048Mid-sized | 89.85 |
| Byrnes Health Education CenterEIN 23-2588187 | Health | PA | $1,174,724Small | 86.43 |