SEC Form 4 · accession 0001179110-16-031541

ACCELERON PHARMA INC · XLRN

Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗

Reporting owner

Officer — CEO and President · Director

Period of report

Nov 9, 2016

Accepted (ET)

Nov 14, 2016 · 5:49 pm EST

Rule 10b5-1 plan

unknown — predates the checkbox

Issuer CIK

0001280600

Table I — non-derivative securities

Security	Date	Code	Shares	Price	A/D	Owned after	D/I
Common Stock	Nov 9, 2016	M	31,543	$5.88	A	245,627	D
Common Stock	Nov 9, 2016	M	37,500	$5.28	A	283,127	D
Common Stock	Nov 9, 2016	M	9,375	$5.28	A	292,502	D
Common Stock	Nov 9, 2016	M	15,976	$5.28	A	308,478	D
Common Stock	Nov 9, 2016	M	5,606	$5.08	A	314,084	D
Common Stock^F2	Nov 9, 2016	S	100,000	$32.19	D	214,084	D

Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	Owned after	D/I
Option to Purchase Common Stock^F3	$5.88	Nov 9, 2016	M	31,543	D	—	Feb 4, 2020	Common Stock	31,543	18,457	D
Option to Purchase Common Stock^F3	$5.28	Nov 9, 2016	M	37,500	D	—	Dec 16, 2021	Common Stock	37,500	12,500	D
Option to Purchase Common Stock^F4	$5.28	Nov 9, 2016	M	9,375	D	—	Nov 13, 2022	Common Stock	9,375	28,125	D
Option to Purchase Common Stock^F4	$5.28	Nov 9, 2016	M	15,976	D	—	Nov 13, 2022	Common Stock	15,976	21,524	D
Option to Purchase Common Stock^F3	$5.08	Nov 9, 2016	M	5,606	D	—	Mar 27, 2018	Common Stock	5,606	109,027	D

F1The reported transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.
F2The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $32.00 to $32.98, 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.
F3The options of registrant's common stock vested in equal quarterly installments over the first four years after the grant.
F4The options of registrant's common stock vested over three years, with the first vesting three months after the achievement of the appropriate performance trigger. If the performance trigger was not achieved, the options vested on the four year anniversary of the grant.