| Type | Filed | Filer | Subject | Shares Owned | Percent Owned | |
|---|---|---|---|---|---|---|
| SC 13D/A | 2021-11-24 | Avoro Capital Advisors LLC | ACCELERON PHARMA INC | - | 0.0% | EDGAR |
| SC 13G/A | 2021-11-10 | FMR LLC | ACCELERON PHARMA INC | 493,493 | 0.8% | EDGAR |
| SC 13D | 2021-10-05 | Avoro Capital Advisors LLC | ACCELERON PHARMA INC | 4,476,100 | 7.3% | EDGAR |
| SC 13G/A | 2021-02-16 | PRICE T ROWE ASSOCIATES INC /MD/ | ACCELERON PHARMA INC | 5,309,766 | 8.8% | EDGAR |
| SC 13G/A | 2021-02-10 | VANGUARD GROUP INC | ACCELERON PHARMA INC | 5,028,578 | 8.4% | EDGAR |
| SC 13G/A | 2021-02-08 | FMR LLC | ACCELERON PHARMA INC | 4,678,413 | 7.8% | EDGAR |
| SC 13G/A | 2021-01-29 | BlackRock Inc. | ACCELERON PHARMA INC | 4,611,814 | 7.7% | EDGAR |
| SC 13G/A | 2020-09-10 | FMR LLC | ACCELERON PHARMA INC | 5,886,663 | 9.8% | EDGAR |
| SC 13D/A | 2020-07-16 | BRISTOL MYERS SQUIBB CO | ACCELERON PHARMA INC | 7,008,510 | 12.0% | EDGAR |
| SC 13G/A | 2020-06-09 | BlackRock Inc. | ACCELERON PHARMA INC | 5,392,268 | 10.0% | EDGAR |
| SC 13G/A | 2020-02-14 | PRICE T ROWE ASSOCIATES INC /MD/ | ACCELERON PHARMA INC | 3,432,743 | 6.4% | EDGAR |
| SC 13G/A | 2020-02-12 | VANGUARD GROUP INC | ACCELERON PHARMA INC | 4,165,147 | 7.8% | EDGAR |
| SC 13G/A | 2020-02-07 | FMR LLC | ACCELERON PHARMA INC | 7,962,234 | 15.0% | EDGAR |
| SC 13G/A | 2020-02-05 | BlackRock Inc. | ACCELERON PHARMA INC | 4,887,801 | 9.2% | EDGAR |
| SC 13G/A | 2019-11-12 | PRICE T ROWE ASSOCIATES INC /MD/ | ACCELERON PHARMA INC | 2,978,886 | 5.6% | EDGAR |
| SC 13G/A | 2019-02-14 | PRICE T ROWE ASSOCIATES INC /MD/ | ACCELERON PHARMA INC | 5,015,667 | 10.8% | EDGAR |
| SC 13G/A | 2019-02-13 | FMR LLC | ACCELERON PHARMA INC | 6,928,539 | 15.0% | EDGAR |
| SC 13G/A | 2019-02-11 | VANGUARD GROUP INC | ACCELERON PHARMA INC | 3,522,628 | 7.6% | EDGAR |
| SC 13G/A | 2019-02-04 | BlackRock Inc. | ACCELERON PHARMA INC | 4,428,894 | 9.6% | EDGAR |
| SC 13D/A | 2019-01-22 | CELGENE CORP /DE/ | ACCELERON PHARMA INC | 6,863,664 | 13.3% | EDGAR |