BUERBA SEBASTIAN (Chief Marketing Officer) sold 93.8% of their position (2.50K shares) of STAMPS.COM INC on the open market

Open‑market sale worth $624.0K — a major position exit. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 7 sales

BUERBA SEBASTIAN

Filed: 9/6/2018ACC: 0001082923-18-000111

InsiderBUERBA SEBASTIANCIK 1713603

→

IssuerSTAMPS.COM INCCIK 1082923

Officer· Chief Marketing Officer

Since Jul 2018

-2.50K

Net shares

Net seller

$624.0K

Total sold

Open market trades

0B · 7S

Total transactions

2.50K acquired · 5K disposed

Non-Derivative Transactions9

Common Stock

Direct

M · Option Exercise

+555.00

Price / share

$66.28

Trade value

$36.79K

% of position

338.4%

9/4/2018

164.00→719.00

Common Stock

Direct

M · Option Exercise

+1.94K

Price / share

$112.00

Trade value

$217.73K

% of position

270.4%

9/4/2018

719.00→2.66K

Common Stock

Direct

S · Sale

−400.00

Price / share

$246.79

Trade value

$98.72K

% of position

15.0%

9/4/2018

2.66K→2.26K

Common Stock

Direct

S · Sale

−730.00

Price / share

$247.89

Trade value

$180.96K

% of position

32.3%

9/4/2018

2.26K→1.53K

Common Stock

Direct

S · Sale

−383.00

Price / share

$248.83

Trade value

$95.30K

% of position

25.0%

9/4/2018

1.53K→1.15K

Common Stock

Direct

S · Sale

−50.00

Price / share

$249.85

Trade value

$12.49K

% of position

4.3%

9/4/2018

1.15K→1.10K

Common Stock

Direct

S · Sale

−150.00

Price / share

$251.27

Trade value

$37.69K

% of position

13.6%

9/4/2018

1.10K→950.00

Common Stock

Direct

S · Sale

−650.00

Price / share

$252.94

Trade value

$164.41K

% of position

68.4%

9/4/2018

950.00→300.00

Common Stock

Direct

S · Sale

−136.00

Price / share

$253.40

Trade value

$34.46K

% of position

45.3%

9/4/2018

300.00→164.00

Total

Net shares

+0.00

Net value

-$369.52K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	9/4/2018	M · Option Exercise	+555.00	$66.28	$36.79K	338.4%	164.00	719.00
Common Stock Direct	9/4/2018	M · Option Exercise	+1.94K	$112.00	$217.73K	270.4%	719.00	2.66K
Common Stock Direct	9/4/2018	S · Sale	−400.00	$246.79	$98.72K	15.0%	2.66K	2.26K
Common Stock Direct	9/4/2018	S · Sale	−730.00	$247.89	$180.96K	32.3%	2.26K	1.53K
Common Stock Direct	9/4/2018	S · Sale	−383.00	$248.83	$95.30K	25.0%	1.53K	1.15K
Common Stock Direct	9/4/2018	S · Sale	−50.00	$249.85	$12.49K	4.3%	1.15K	1.10K
Common Stock Direct	9/4/2018	S · Sale	−150.00	$251.27	$37.69K	13.6%	1.10K	950.00
Common Stock Direct	9/4/2018	S · Sale	−650.00	$252.94	$164.41K	68.4%	950.00	300.00
Common Stock Direct	9/4/2018	S · Sale	−136.00	$253.40	$34.46K	45.3%	300.00	164.00
Total			+0.00		-$369.52K

Derivative Transactions2

Stock Option (Common Stock)

Direct

M · Option Exercise

Converts to

Common Stock

555.00 shares

−555.00

Strike price

66.28

Held after

50.85K

Exercisable

—

9/4/2018

Stock Option (Common Stock)

Direct

M · Option Exercise

Converts to

Common Stock

1.94K shares

−1.94K

Strike price

112.0

Held after

48.91K

Exercisable

—

9/4/2018

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Stock Option (Common Stock) Direct	Common Stock555.00 shares	9/4/2018	M · Option Exercise	−555.00	66.28	—	50.85K
Stock Option (Common Stock) Direct	Common Stock1.94K shares	9/4/2018	M · Option Exercise	−1.94K	112.0	—	48.91K