MCLAUGHLIN KEVIN F (SVP, CFO and Treasurer) sold 70.1% of their position (25K shares) of ACCELERON PHARMA INC on the open market

Open‑market sale worth $4.01M — a major position exit. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 3 sales

MCLAUGHLIN KEVIN F

Filed: 9/24/2021ACC: 0001179110-21-008935

InsiderMCLAUGHLIN KEVIN FCIK 1214938

→

IssuerACCELERON PHARMA INCCIK 1280600

Officer· SVP, CFO and Treasurer

Since Jun 2018

-25K

Net shares

Net seller

$4.01M

Total sold

Open market trades

0B · 3S

Total transactions

25K acquired · 50K disposed

Non-Derivative Transactions8

Common Stock

Direct

M · Option Exercise

+2.50K

Price / share

$30.17

Trade value

$75.42K

% of position

23.4%

9/23/2021

10.68K→13.18K

Common Stock

Direct

M · Option Exercise

+9.80K

Price / share

$40.61

Trade value

$397.98K

% of position

74.3%

9/23/2021

13.18K→22.98K

Common Stock

Direct

M · Option Exercise

+7.33K

Price / share

$41.64

Trade value

$305.22K

% of position

31.9%

9/23/2021

22.98K→30.31K

Common Stock

Direct

S · Sale

−18.65K

Price / share

$160.26

Trade value

$2.99M

% of position

61.5%

9/23/2021

30.31K→11.66K

Common Stock

Direct

S · Sale

−983.00

Price / share

$161.26

Trade value

$158.52K

% of position

8.4%

9/23/2021

11.66K→10.68K

Common Stock

Direct

M · Option Exercise

+5.20K

Price / share

$40.61

Trade value

$211.17K

% of position

48.7%

9/24/2021

10.68K→15.88K

Common Stock

Direct

M · Option Exercise

+170.00

Price / share

$41.64

Trade value

$7.08K

% of position

1.1%

9/24/2021

15.88K→16.05K

Common Stock

Direct

S · Sale

−5.37K

Price / share

$160.38

Trade value

$861.24K

% of position

33.5%

9/24/2021

16.05K→10.68K

Total

Net shares

+0.00

Net value

-$3.01M

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	9/23/2021	M · Option Exercise	+2.50K	$30.17	$75.42K	23.4%	10.68K	13.18K
Common Stock Direct	9/23/2021	M · Option Exercise	+9.80K	$40.61	$397.98K	74.3%	13.18K	22.98K
Common Stock Direct	9/23/2021	M · Option Exercise	+7.33K	$41.64	$305.22K	31.9%	22.98K	30.31K
Common Stock Direct	9/23/2021	S · Sale	−18.65K	$160.26	$2.99M	61.5%	30.31K	11.66K
Common Stock Direct	9/23/2021	S · Sale	−983.00	$161.26	$158.52K	8.4%	11.66K	10.68K
Common Stock Direct	9/24/2021	M · Option Exercise	+5.20K	$40.61	$211.17K	48.7%	10.68K	15.88K
Common Stock Direct	9/24/2021	M · Option Exercise	+170.00	$41.64	$7.08K	1.1%	15.88K	16.05K
Common Stock Direct	9/24/2021	S · Sale	−5.37K	$160.38	$861.24K	33.5%	16.05K	10.68K
Total			+0.00		-$3.01M

Derivative Transactions5

Option to Purchase Common Stock

Direct

M · Option Exercise

Converts to

Common Stock

2.50K shares

−2.50K

Strike price

30.17

Held after

2.66K

Exercisable

—

9/23/2021

Option to Purchase Common Stock

Direct

M · Option Exercise

Converts to

Common Stock

9.80K shares

−9.80K

Strike price

40.61

Held after

16.46K

Exercisable

—

9/23/2021

Option to Purchase Common Stock

Direct

M · Option Exercise

Converts to

Common Stock

7.33K shares

−7.33K

Strike price

41.64

Held after

20.67K

Exercisable

—

9/23/2021

Option to Purchase Common Stock

Direct

M · Option Exercise

Converts to

Common Stock

5.20K shares

−5.20K

Strike price

40.61

Held after

11.26K

Exercisable

—

9/24/2021

Option to Purchase Common Stock

Direct

M · Option Exercise

Converts to

Common Stock

170.00 shares

−170.00

Strike price

41.64

Held after

20.50K

Exercisable

—

9/24/2021

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Option to Purchase Common Stock Direct	Common Stock2.50K shares	9/23/2021	M · Option Exercise	−2.50K	30.17	—	2.66K
Option to Purchase Common Stock Direct	Common Stock9.80K shares	9/23/2021	M · Option Exercise	−9.80K	40.61	—	16.46K
Option to Purchase Common Stock Direct	Common Stock7.33K shares	9/23/2021	M · Option Exercise	−7.33K	41.64	—	20.67K
Option to Purchase Common Stock Direct	Common Stock5.20K shares	9/24/2021	M · Option Exercise	−5.20K	40.61	—	11.26K
Option to Purchase Common Stock Direct	Common Stock170.00 shares	9/24/2021	M · Option Exercise	−170.00	41.64	—	20.50K