Grapevines
- KAAVISH FOUNDATION
- Kaity Licina's Giving Circle
- Kalamazoo Giving Circle
- Kansas City Guys for Good
- Kara Giguere's Giving Circle
- Karaoke Stars Giving Circle
- Karen Bennett's Giving Circle
- Karen Circle
- Karen Corley's Giving Circle
- Karen Dorr's Giving Circle
- Karen Rainey's Giving Circle
- Karen's Giving Circle
- Karma Steps Up
- Kate Collignon's Giving Circle
- Katherine Allen's Giving Circle
- Kathleen Bauman's Giving Circle
- Kathleen Livingston's Giving Circle
- Kathryn's Giving Circle
- Kathryn Tschoepe's Giving Circle
- Katie Garfinkel's Giving Circle
- Katie Quattrone's Giving Circle
- Katy Decker's Giving Circle
- Katy McQuiston's Giving Circle
- Kearney Alumni for Change*
- Keep Maine Democratic
- Keep Minn Blue
- Keep Minnesota Blue
- Keith Vance's Giving Circle
- Kellie's Giving Circle
- Kelly Baden + Jodi Magee's Giving Circle
- Kelly Scanlon's Giving Circle
- Kelly's Giving Circle
- Kelsey Hale's Giving Circle
- Kendall Smith's Giving Circle
- Kendra Klemme's Giving Circle
- Kenvyion's lawyer
- Keogh Family Philanthropy
- Keren Baktana Tel Aviv
- Keren in Katana Yokneam - Keren Baktana
- Kern Latino Giving Circle
- Key Biscayne Women’s Giving Circle
- Kheer Solutions Giving Circle
- Kiboh Giving Circle
- Kick ALS
- Kick Some Fascist Ass
- Kids Way Corp
- Killeen Neighbors for Good
- Kim Andrews's Giving Circle
- Kimball Electronics Gives
- Kim Plank's Giving Circle
- Kindred: An African American LGBT Giving Circle
- King County Women for Good
- King Township Women of Influence Giving Circle
- KiP- Kids in Philanthropy
- Kirstin's Circle
- Kit
- Kitchen Table Democracy
- Kitchen Table Giving Circle
- Knoxville Women in Tech for Good
- KPLA Latinx Giving Circle
- Kreative Arts Collective
- Kristen McCann's Giving Circle
- Kyle's 100 Holes Campaign for Mark A Kreusch Foundation