Sujay Kango - Sep 27, 2021 Form 4 Insider Report for ACCELERON PHARMA INC (XLRN)

Role: EVP, Chief Commercial Officer
Signature: /s/ Adam M. Veness, as attorney-in-fact for Sujay Kango
Stock symbol: XLRN
Transactions as of: Sep 27, 2021
Transactions value $: -$671,950
Form type: 4
Date filed: 9/27/2021, 07:21 PM
Previous filing: Sep 22, 2021
Next filing: Nov 22, 2021
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	XLRN	Common Stock	Options Exercise	$203K	+5K	+27.01%	$40.61^*	23.5K	Sep 27, 2021	Direct	F1
transaction	XLRN	Common Stock	Sale	-$875K	-5K	-21.27%	$175.00	18.5K	Sep 27, 2021	Direct	F1

Showing 1 to 2 of 2 entries

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	XLRN	Option to Purchase Common Stock	Options Exercise	$0	-5K	-16.67%	$0.00	25K	Sep 27, 2021	Common Stock	5K	$40.61	Direct	F1, F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	The reported transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.
F2	The shares of common stock underlying this stock option award vested as to 25% of the shares on the first anniversary of February 12, 2018 and the remaining shares vest in equal quarterly installments over the following three years thereafter.