X0306
4
2019-04-02
0
0001280600
ACCELERON PHARMA INC
XLRN
0001214938
MCLAUGHLIN KEVIN F
128 SIDNEY STREET
CAMBRIDGE
MA
02139
0
1
0
0
SVP, CFO and Treasurer
Common Stock
2019-04-02
4
S
0
648
48.02
D
42279
D
The reported sales were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.
The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $48.00 to $48.03 inclusive. The reporting person undertakes to provide Acceleron Pharma Inc., any security holder of Acceleron Pharma Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (2) to this Form 4.
/s/ John D. Quisel, as attorney-in-fact for Kevin F. McLaughlin
2019-04-04