X0304 4 2012-01-12 0 0001082923 STAMPS.COM INC STMP 0000949119 MILLER LLOYD I III 4550 GORDON DRIVE NAPLES FL 34102 1 0 1 0 Common Stock 2012-01-12 4 S 0 50700 28.6463 D 441966 I By Milfam II L.P. Common Stock 2012-01-12 4 S 0 36400 28.6463 D 314003 D Common Stock 2012-01-12 4 S 0 27300 28.6463 D 232044 I By Trust A-4 - Lloyd I. Miller Common Stock 2012-01-12 4 S 0 15600 28.6463 D 135033 I By Marli Miller Managed Common Stock 2012-01-13 4 S 0 2700 29.50 D 126061 I By Milgrat I (G7) Common Stock 58505 I By Milgrat I (X7) Common Stock 55000 I By Milfam I L.P. Common Stock 1000 I By Lloyd I. Miller, custodian under Florida UGMA for Lloyd I. Miller, IV Common Stock 1000 I By Lloyd I. Miller, custodian under Florida UGMA for Alexandra B. Miller Common Stock 29489 I By Milfam NG LLC Stock Option (Common Stock) 14.50 2004-04-23 2014-04-23 Common Stock 5000 5000 D Stock Option (Common Stock) 20.69 2005-05-25 2015-05-25 Common Stock 5000 10000 D Stock Option (Common Stock) 31.64 2006-06-07 2016-06-07 Common Stock 5000 15000 D Stock Option (Common Stock) 13.81 2007-06-06 2017-06-06 Common Stock 5000 20000 D Stock Option (Common Stock) 13.48 2008-05-22 2018-05-22 Common Stock 5000 25000 D Stock Option (Common Stock) 8.86 2009-06-25 2019-06-25 Common Stock 5000 30000 D Stock Option (Common Stock) 10.55 2010-06-16 2020-06-16 Common Stock 5000 35000 D Stock Option (Common Stock) 12.33 2011-06-15 2021-06-15 Common Stock 5000 40000 D This sale was executed pursuant to a pre-arranged trading plan compliant with Rule 10b5-1. The price in Column 4 is a weighted average price. The prices actually paid ranged from $28.00 to $29.00 per share. The reporting person will provide the Issuer, any security holder of the Issuer, or the SEC staff, upon request, information regarding the number of shares purchased at each price within the range. The reporting person disclaims beneficial ownership of these securities except to the extent of his pecuniary interest therein. This filing shall not be deemed an admission that the reporting person is, for purposes of Section 16 of the Securities Exchange Act of 1934 or otherwise, the beneficial owner of any equity securities covered by this filing. /s/ David J. Hoyt Attorney-in-fact 2012-01-17