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 $556.4K — a major position exit. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 7 sales

BUERBA SEBASTIAN

Filed: 10/3/2018ACC: 0001082923-18-000115

InsiderBUERBA SEBASTIANCIK 1713603

→

IssuerSTAMPS.COM INCCIK 1082923

Officer· Chief Marketing Officer

Since Jul 2018

-2.50K

Net shares

Net seller

$556.4K

Total sold

Open market trades

0B · 7S

Total transactions

2.50K acquired · 5K disposed

Non-Derivative Transactions9

Common Stock

Direct

M · Option Exercise

+556.00

Price / share

$66.28

Trade value

$36.85K

% of position

339.0%

10/1/2018

164.00→720.00

Common Stock

Direct

M · Option Exercise

+1.95K

Price / share

$112.00

Trade value

$217.84K

% of position

270.1%

10/1/2018

720.00→2.67K

Common Stock

Direct

S · Sale

−251.00

Price / share

$219.36

Trade value

$55.06K

% of position

9.4%

10/1/2018

2.67K→2.41K

Common Stock

Direct

S · Sale

−500.00

Price / share

$220.38

Trade value

$110.19K

% of position

20.7%

10/1/2018

2.41K→1.91K

Common Stock

Direct

S · Sale

−400.00

Price / share

$221.52

Trade value

$88.61K

% of position

20.9%

10/1/2018

1.91K→1.51K

Common Stock

Direct

S · Sale

−350.00

Price / share

$222.48

Trade value

$77.87K

% of position

23.1%

10/1/2018

1.51K→1.16K

Common Stock

Direct

S · Sale

−450.00

Price / share

$223.68

Trade value

$100.66K

% of position

38.7%

10/1/2018

1.16K→714.00

Common Stock

Direct

S · Sale

−250.00

Price / share

$225.03

Trade value

$56.26K

% of position

35.0%

10/1/2018

714.00→464.00

Common Stock

Direct

S · Sale

−300.00

Price / share

$225.99

Trade value

$67.80K

% of position

64.7%

10/1/2018

464.00→164.00

Total

Net shares

+0.00

Net value

-$301.74K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	10/1/2018	M · Option Exercise	+556.00	$66.28	$36.85K	339.0%	164.00	720.00
Common Stock Direct	10/1/2018	M · Option Exercise	+1.95K	$112.00	$217.84K	270.1%	720.00	2.67K
Common Stock Direct	10/1/2018	S · Sale	−251.00	$219.36	$55.06K	9.4%	2.67K	2.41K
Common Stock Direct	10/1/2018	S · Sale	−500.00	$220.38	$110.19K	20.7%	2.41K	1.91K
Common Stock Direct	10/1/2018	S · Sale	−400.00	$221.52	$88.61K	20.9%	1.91K	1.51K
Common Stock Direct	10/1/2018	S · Sale	−350.00	$222.48	$77.87K	23.1%	1.51K	1.16K
Common Stock Direct	10/1/2018	S · Sale	−450.00	$223.68	$100.66K	38.7%	1.16K	714.00
Common Stock Direct	10/1/2018	S · Sale	−250.00	$225.03	$56.26K	35.0%	714.00	464.00
Common Stock Direct	10/1/2018	S · Sale	−300.00	$225.99	$67.80K	64.7%	464.00	164.00
Total			+0.00		-$301.74K

Derivative Transactions2

Stock Option (Common Stock)

Direct

M · Option Exercise

Converts to

Common Stock

556.00 shares

−556.00

Strike price

66.28

Held after

48.35K

Exercisable

—

10/1/2018

Stock Option (Common Stock)

Direct

M · Option Exercise

Converts to

Common Stock

1.95K shares

−1.95K

Strike price

112.0

Held after

46.41K

Exercisable

—

10/1/2018

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Stock Option (Common Stock) Direct	Common Stock556.00 shares	10/1/2018	M · Option Exercise	−556.00	66.28	—	48.35K
Stock Option (Common Stock) Direct	Common Stock1.95K shares	10/1/2018	M · Option Exercise	−1.95K	112.0	—	46.41K