| Type | Filed | Filer | Subject | Shares Owned | Percent Owned | |
|---|---|---|---|---|---|---|
| SC 13G/A | 2017-02-14 | FMR LLC | Dimension Therapeutics, Inc. | 4,893,322 | 19.5% | EDGAR |
| SC 13G/A | 2017-02-14 | FIL Ltd | Dimension Therapeutics, Inc. | 1,688,870 | 6.7% | EDGAR |
| SC 13G | 2016-05-06 | FIL Ltd | Dimension Therapeutics, Inc. | 2,066,979 | 8.3% | EDGAR |
| SC 13G | 2016-02-12 | FMR LLC | Dimension Therapeutics, Inc. | 7,000,106 | 28.0% | EDGAR |
| SC 13D | 2015-11-06 | ORBIMED ADVISORS LLC | Dimension Therapeutics, Inc. | 5,397,698 | 21.7% | EDGAR |
| SC 13D | 2015-11-02 | New Leaf Ventures III, L.P. | Dimension Therapeutics, Inc. | 2,059,283 | 8.0% | EDGAR |