| Type | Filed | Filer | Subject | Shares Owned | Percent Owned | |
|---|---|---|---|---|---|---|
| SC 13G/A | 2017-02-14 | FMR LLC | Syndax Pharmaceuticals Inc | 1,480,047 | 8.1% | EDGAR |
| SC 13G/A | 2017-02-09 | WELLINGTON MANAGEMENT GROUP LLP | Syndax Pharmaceuticals Inc | 2,344,648 | 12.9% | EDGAR |
| SC 13G | 2017-02-09 | MPM BioVentures IV QP LP | Syndax Pharmaceuticals Inc | 1,806,759 | 9.9% | EDGAR |
| SC 13G | 2017-01-30 | BlackRock Inc. | Syndax Pharmaceuticals Inc | 1,462,464 | 8.0% | EDGAR |
| SC 13G | 2017-01-09 | Domain Partners VIII, L.P. | Syndax Pharmaceuticals Inc | 761,062 | 4.2% | EDGAR |
| SC 13G | 2016-09-12 | WELLINGTON MANAGEMENT GROUP LLP | Syndax Pharmaceuticals Inc | 1,956,236 | 11.0% | EDGAR |
| SC 13G | 2016-04-11 | FMR LLC | Syndax Pharmaceuticals Inc | 2,094,464 | 12.1% | EDGAR |