SEC Form 4 · accession 0001179110-15-005307

ACCELERON PHARMA INC · XLRN

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

Reporting owner

Matthew L Sherman

Officer — EVP & Chief Medical Officer

Period of report

Mar 18, 2015

Accepted (ET)

Mar 20, 2015 · 5:12 pm EDT

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	Nature of ownership
Common Stock	Mar 18, 2015	M	4,000	$0.48	A	24,004	D
Common Stock^F2	Mar 18, 2015	S	3,279	$41.07	D	20,725	D
Common Stock^F3	Mar 18, 2015	S	721	$41.63	D	20,004	D
Common Stock	Mar 18, 2015	M	800	$5.08	A	20,804	D
Common Stock	Mar 18, 2015	S	800	$41.21	D	20,004	D
Common Stock^F4	Mar 18, 2015	S	900	$41.13	D	16,800	I	By GRAT
Common Stock	Mar 18, 2015	S	100	$41.60	D	16,700	I	By GRAT
Common Stock	Mar 18, 2015	S	200	$41.21	D	16,500	I	By GRAT

Table II — derivative securities

Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	Owned after	D/I
Option to Purchase Common Stock^F5	$0.48	Mar 18, 2015	M	4,000	D	—	May 31, 2016	Common Stock	4,000	20,000	D
Option to Purchase Common Stock^F6	$5.08	Mar 18, 2015	M	800	D	—	Mar 27, 2018	Common Stock	800	25,496	D

Explanation of responses

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 $40.53 to $41.44, 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 price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $41.58 to $41.67, 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 (3) to this Form 4.
F4The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $40.58 to $41.57, 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 (4) to this Form 4.
F5The options of registrant's common stock vested as to 25% of the shares on the first anniversary of the grant and in equal installments quarterly thereafter.
F6The options of registrant's common stock vest in equal quarterly installments over the first four years after the grant.