X0306 4 2016-02-24 0 0001082923 STAMPS.COM INC STMP 0000949119 MILLER LLOYD I III 3300 SOUTH DIXIE HIGHWAY SUITE 1-365 WEST PALM BEACH FL 33405 1 0 0 0 Common Stock 2016-02-24 4 M 0 5000 23.38 A 195542 D Common Stock 2016-02-24 4 M 0 5000 13.10 A 200542 D Common Stock 2016-02-24 4 M 0 5000 13.10 A 205542 D Common Stock 2016-02-24 4 M 0 5000 10.55 A 210542 D Common Stock 2016-02-24 4 M 0 5000 12.33 A 215542 D Common Stock 72730 I By Trust Account Common Stock 10539 I By Milgrat (Z9) Common Stock 129785 I By Trust A-4 - Lloyd I. Miller Common Stock 251212 I By Milfam II L.P. Common Stock 46839 I By Milfam I L.P. Common Stock 9381 I By Trust C - Lloyd I. Miller Common Stock 1000 I By Lloyd I. Miller, IV brokerage account Common Stock 1000 I By AMIL of Ohio, LLC Stock Option (Common Stock) 23.38 2016-02-24 4 M 0 5000 0.00 D 2006-06-07 2016-06-07 Common Stock 5000 0 D Stock Option (Common Stock) 13.10 2016-02-24 4 M 0 5000 0.00 D 2007-06-06 2017-06-06 Common Stock 5000 0 D Stock Option (Common Stock) 13.10 2016-02-24 4 M 0 5000 0.00 D 2008-05-22 2018-05-22 Common Stock 5000 0 D Stock Option (Common Stock) 10.55 2016-02-24 4 M 0 5000 0.00 D 2010-06-16 2020-06-16 Common Stock 5000 0 D Stock Option (Common Stock) 12.33 2016-02-24 4 M 0 5000 0.00 D 2011-06-15 2021-06-15 Common Stock 5000 0 D Stock Option (Common Stock) 23.18 2012-06-13 2022-06-13 Common Stock 5000 5000 D Stock Option (Common Stock) 37.19 2013-06-12 2023-06-12 Common Stock 5000 10000 D Stock Option (Common Stock) 34.03 2014-06-11 2024-06-11 Common Stock 5000 15000 D Stock Option (Common Stock) 70.77 2015-06-17 2025-06-17 Common Stock 5000 20000 D 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 2016-02-25