Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
  Buerba Sebastian
 2. Date of Event Requiring Statement (Month/Day/Year)
07/25/2017		 3. Issuer Name and Ticker or Trading Symbol
STAMPS.COM INC [STMP]
(Last)
(First)
(Middle)
1990 E. GRAND AVE.		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Chief Marketing Officer
 5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

EL SEGUNDO, CA 90245		 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Stock 319
D
 

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Stock Option (Common Stock) 10/19/2014(1) 09/19/2024 Common Stock 48,333 $ 32.41 D  
Stock Option (Common Stock) 10/19/2015(2) 09/19/2024 Common Stock 76,667 $ 32.41 D  
Stock Option (Common Stock) 12/17/2015(3) 04/09/2025 Common Stock 20,000 $ 66.28 D  
Stock Option (Common Stock) 09/01/2017(4) 04/25/2027 Common Stock 70,000 $ 112 D  

Reporting Owners

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

Signatures

/s/ David M. Zlotchew, by power of attorney for Sebastian Buerba 08/02/2017
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) This option had fully vested prior to the date of this Form 3.
(2) This option had vested with respect to all but 8,056 shares prior to the date of this Form 3. The option will vest with respect to the remaining shares in two equal installments on August 19, 2017 and September 19, 2017.
(3) This performance-based option award vests in equal monthly installments on the last day of each month over the 36 months following November 18, 2015.
(4) This option vests in 36 approximately equal monthly installments. The first vesting date is September 1, 2017.

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