X0306
4
2017-09-11
0
0001082923
STAMPS.COM INC
STMP
0001334644
Biswas Michael John
1990 E. GRAND AVE.
EL SEGUNDO
CA
90245
0
1
0
0
Chief Technology Officer
Common Stock
2017-09-11
4
M
0
13468
12.55
A
15365
D
Common Stock
2017-09-11
4
M
0
24032
32.41
A
39397
D
Common Stock
2017-09-11
4
S
0
9057
190.2446
D
30340
D
Common Stock
2017-09-11
4
S
0
3609
191.0469
D
26731
D
Common Stock
2017-09-11
4
S
0
10841
192.2951
D
15890
D
Common Stock
2017-09-11
4
S
0
13226
193.0648
D
2664
D
Common Stock
2017-09-11
4
S
0
2050
193.9244
D
614
D
Common Stock
2017-09-11
4
S
0
319
194.9238
D
295
D
Common Stock
2017-09-13
4
M
0
37500
32.41
A
37795
D
Common Stock
2017-09-13
4
S
0
15382
200.1596
D
22413
D
Common Stock
2017-09-13
4
S
0
10428
201.6838
D
11985
D
Common Stock
2017-09-13
4
S
0
11440
202.1965
D
545
D
Common Stock
2017-09-13
4
S
0
250
203.15
D
295
D
Stock Option (Common Stock)
12.55
2017-09-11
4
M
0
11476
0.00
D
2011-05-20
2021-05-20
Common Stock
13468
215976
D
Stock Option (Common Stock)
32.41
2017-09-11
4
M
0
24032
0.00
D
2015-10-19
2024-09-19
Common Stock
24032
191944
D
Stock Options(Common Stock)
32.41
2017-09-13
4
M
0
37500
0.00
D
2015-10-19
2024-09-19
Common Stock
37500
154444
D
This sale was executed pursuant to a prearranged trading plan compliant with Rule 10b5-1.
This sale price reflects a weighted average of multiple prices ranging from $189.70 to $190.65. Full information regarding the number of shares sold at each price will be provided to the Securities and Exchange Commission staff, the issuer or any security holder, upon request.
This sale price reflects a weighted average of multiple prices ranging from $190.70 to $191.60. Full information regarding the number of shares sold at each price will be provided to the Securities and Exchange Commission staff, the issuer or any security holder, upon request.
This sale price reflects a weighted average of multiple prices ranging from $191.70 to $192.65. Full information regarding the number of shares sold at each price will be provided to the Securities and Exchange Commission staff, the issuer or any security holder, upon request.
This sale price reflects a weighted average of multiple prices ranging from $192.70 to $193.65. Full information regarding the number of shares sold at each price will be provided to the Securities and Exchange Commission staff, the issuer or any security holder, upon request.
This sale price reflects a weighted average of multiple prices ranging from $193.70 to $194.30. Full information regarding the number of shares sold at each price will be provided to the Securities and Exchange Commission staff, the issuer or any security holder, upon request.
This sale price reflects a weighted average of multiple prices ranging from $194.90 to $195.30. Full information regarding the number of shares sold at each price will be provided to the Securities and Exchange Commission staff, the issuer or any security holder, upon request.
This sale price reflects a weighted average of multiple prices ranging from $200.00 to $200.95. Full information regarding the number of shares sold at each price will be provided to the Securities and Exchange Commission staff, the issuer or any security holder, upon request.
This sale price reflects a weighted average of multiple prices ranging from $201.15 to $201.925. Full information regarding the number of shares sold at each price will be provided to the Securities and Exchange Commission staff, the issuer or any security holder, upon request.
This sale price reflects a weighted average of multiple prices ranging from $201.95 to $202.70. Full information regarding the number of shares sold at each price will be provided to the Securities and Exchange Commission staff, the issuer or any security holder, upon request.
/s/ Matthew A. Lipson, by Power of Attorney for Michael Biswas
2017-09-13