| 2017 Rank | Service Provider | Number of Accounts (Ks) |
| 1 | DST | 17,800* |
| 2 | BNY Mellon | 6,184 |
| 3 | U.S. Bancorp Fund Services | 2,671 |
| 4 | Gemini Fund Services | 939 |
| 5 | FIS | 769 |
| 6 | Northern Trust | 577 |
| 7 | ALPS, A DST Company | 425 |
| 8 | Ultimus Fund Solutions | 364 |
| 9 | UMB Fund Services | 359 |
| 10 | Atlantic Fund Services | 94 |
Data as of 12/31/17
Rankings for number of accounts based on open accounts in open-end U.S. mutual funds.
*Change in number of accounts is primarily due to DST’s acquisition of Boston Financial Data Services.