Amended Statement of Changes in Beneficial Ownership (4/a)

FORM 4 [ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

1. Name and Address of Reporting Person ^* Buerba Sebastian	2. Issuer Name and Ticker or Trading Symbol STAMPS.COM INC [ STMP ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Chief Marketing Officer
(Last) (First) (Middle) 1990 E. GRAND AVE.	3. Date of Earliest Transaction (MM/DD/YYYY) 7/1/2020
(Street) EL SEGUNDO, CA 90245 (City) (State) (Zip)	4. If Amendment, Date Original Filed (MM/DD/YYYY) 7/6/2020	6. Individual or Joint/Group Filing (Check Applicable Line) _X _ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security (Instr. 3)	2. Trans. Date	2A. Deemed Execution Date, if any	3. Trans. Code (Instr. 8)		4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
1.Title of Security (Instr. 3)	2. Trans. Date	2A. Deemed Execution Date, if any	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	7/1/2020		S⁽¹⁾		260	D	$196	544	D
Common Stock	7/1/2020		M		1112	A	$66.28	1656	D
Common Stock	7/1/2020		M		25548	A	$112	27204	D
Common Stock	7/1/2020		M		19724	A	$35.04	46928	D
Common Stock	7/1/2020		S⁽¹⁾		42791	D	$196.2922 ⁽²⁾	4137	D
Common Stock	7/1/2020		S⁽¹⁾		3593	D	$197.0819 ⁽³⁾	544	D
Common Stock	7/2/2020		M		13976	A	$112	14520	D
Common Stock	7/2/2020		M		9475	A	$35.04	23995	D
Common Stock	7/2/2020		S⁽¹⁾		4280	D	$196.4989 ⁽⁴⁾	19715	D
Common Stock	7/2/2020		S⁽¹⁾		7905	D	$197.5569 ⁽⁵⁾	11810	D
Common Stock	7/2/2020		S⁽¹⁾		7808	D	$198.4432 ⁽⁶⁾	4002	D
Common Stock	7/2/2020		S⁽¹⁾		2777	D	$199.3914 ⁽⁷⁾	1225	D
Common Stock	7/2/2020		S⁽¹⁾		681	D	$200.2694 ⁽⁸⁾	544	D
Common Stock	7/6/2020		M		1308	A	$112	1852	D
Common Stock	7/6/2020		M		3010	A	$35.04	4862	D
Common Stock	7/6/2020		S⁽¹⁾		77	D	$196.62	4785	D
Common Stock	7/6/2020		S⁽¹⁾		482	D	$198.4067 ⁽⁹⁾	4303	D
Common Stock	7/6/2020		S⁽¹⁾		1408	D	$199.3582 ⁽¹⁰⁾	2895	D
Common Stock	7/6/2020		S⁽¹⁾		376	D	$200.4587 ⁽¹¹⁾	2519	D
Common Stock	7/6/2020		S⁽¹⁾		286	D	$201.5822 ⁽¹²⁾	2233	D
Common Stock	7/6/2020		S⁽¹⁾		484	D	$202.6079 ⁽¹³⁾	1749	D
Common Stock	7/6/2020		S⁽¹⁾		74	D	$203.11	1675	D
Common Stock	7/6/2020		S⁽¹⁾		399	D	$204.4093 ⁽¹⁴⁾	1276	D
Common Stock	7/6/2020		S⁽¹⁾		732	D	$205.8833 ⁽¹⁵⁾	544	D

*Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)*
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	4. Trans. Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)			11. Nature of Indirect Beneficial Ownership (Instr. 4)
Stock Option (Common Stock)	$66.28	7/1/2020		M			1112	12/17/2015	4/9/2025	Common Stock	1112.0	$0	135298	D
Stock Option (Common Stock)	$112.0	7/1/2020		M			25548	10/1/2017	4/25/2027	Common Stock	25548.0	$0	109750	D
Stock Option	$35.04	7/1/2020		M			19724	6/3/2020	6/3/2029	Common Stock	19724.0	$0	90026	D
Stock Option (Common Stock)	$112.0	7/2/2020		M			13976	10/1/2017	4/25/2027	Common Stock	13976.0	$0	76050	D
Stock Option	$35.04	7/2/2020		M			9475	6/3/2020	6/3/2029	Common Stock	9475.0	$0	66575	D
Stock Option (Common Stock)	$112.0	7/6/2020		M			1308	10/1/2017	4/25/2027	Common Stock	1308.0	$0	65267	D
Stock Option	$35.04	7/6/2020		M			3010	6/3/2020	6/3/2029	Common Stock	3010.0	$0	62257	D

Explanation of Responses:
(1)	This Sale was executed pursuant to a prearranged trading plan compliant with Rule 10b5-1.
(2)	This sales price reflects a weighted average of multiple prices ranging from $196.00 to $196.9950. 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.
(3)	This sales price reflects a weighted average of multiple prices ranging from $197.00 to $197.24. 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.
(4)	This sales price reflects a weighted average of multiple prices ranging from $196.00 to $196.92. 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.
(5)	This sales price reflects a weighted average of multiple prices ranging from $197.0150 to $197.99. 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.
(6)	This sales price reflects a weighted average of multiple prices ranging from $198.03 to $199.01. 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.
(7)	This sales price reflects a weighted average of multiple prices ranging from $199.09 to $199.87. 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.
(8)	This sales price reflects a weighted average of multiple prices ranging from $200.09 to $200.58. 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.
(9)	This sales price reflects a weighted average of multiple prices ranging from $197.85 to $198.84. 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.
(10)	This sales price reflects a weighted average of multiple prices ranging from $198.8550 to $199.81. 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.
(11)	This sales price reflects a weighted average of multiple prices ranging from $199.87 to $200.74. 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.
(12)	This sales price reflects a weighted average of multiple prices ranging from $200.93 to $201.91. 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.
(13)	This sales price reflects a weighted average of multiple prices ranging from $202.07 to $203.00. 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.
(14)	This sales price reflects a weighted average of multiple prices ranging from $204.35 to $204.48. 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.
(15)	This sales price reflects a weighted average of multiple prices ranging from $205.65 to $206.2750. 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.

Remarks:
This Amendment is being filed to report the sale of 260 shares of Common Stock on July 1, 2020 (by the addition of the first transaction line in Table I), which was inadvertently omitted from the original filing, to make corresponding corrections to the numbers of shares beneficially owned following the reported transactions, and to correct certain figures in the price of derivative securities column of Table II.

Reporting Owners
Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
Buerba Sebastian 1990 E. GRAND AVE. EL SEGUNDO, CA 90245			Chief Marketing Officer