Stamps.com (STMP): Park West Asset Management Discloses Big Boost In Stake

Item 1(b).  Address of Issuer’s Principal Executive Offices.

1990 E. Grand Avenue

El Segundo, California 90245

Item 2(a).  Name of Person Filing.

This report on Schedule 13G (this “Schedule 13G”), is being jointly filed by (i) Park West Asset Management LLC (“PWAM”), a Delaware limited liability company and the investment manager to (a) Park West Investors Master Fund, Limited (“PWIMF”), a Cayman Islands exempted company that is the holder of 809,422 shares of common stock, $0.001 par value per share, (“Common Stock”) of the Company reported on this Schedule 13G, and (b) Park West Partners International, Limited (“PWPI” and, collectively with PWIMF, the “PW Funds”), a Cayman Islands exempted company that is the holder of 110,959 shares of Common Stock of the Company reported on this Schedule 13G; and (ii) Peter S. Park, as the sole member and manager of PWAM (“Mr. Park” and, collectively with PWAM, the “Reporting Persons”).

The 920,381 shares of Common Stock of the Company held in the aggregate by the PW Funds, which constitute 5.3% of the shares of Common Stock of the Company deemed to be issued and outstanding as of July 29, 2016, may be deemed to be beneficially owned (x) indirectly by PWAM, as the investment adviser to PWIMF and PWPI, and (y) indirectly by Mr. Park, as the sole member and manager of PWAM.

Item 2(b).  Address of Principal Business Office or, if None, Residence.

The address for the Reporting Persons is:  900 Larkspur Landing Circle, Suite 165, Larkspur, California 94939.

Item 2(c).  Citizenship.

PWAM is organized under the laws of the State of Delaware.  Mr. Park is a citizen of the United States.

Item 2(d).  Title of Class of Securities.

Common Stock, $0.001 par value per share.

Item 2(e).  CUSIP No.

852857200