| Rank | Title | Release Date | Budget | Domestic Revenue | Revenue / Budget |
|---|---|---|---|---|---|
| 1 | Free Solo | 2018-09-28 | $0 | $17.54M | N/A |
| 2 | Summer of Soul (...Or, When the Revolution Could Not Be Televised) | 2021-07-02 | $0 | $2.32M | N/A |
| 3 | Amy | 2015-07-02 | $0 | $100K | N/A |
| 4 | Citizenfour | 2014-10-10 | $0 | $3.4K | N/A |