X0306 4 2015-04-24 0 0000885074 AUTHENTIDATE HOLDING CORP ADAT 0001531964 Lazarus Management Co LLC 3200 CHERRY CREEK SOUTH DRIVE SUITE 670 DENVER CO 80209 0 0 1 0 0001531960 BORUS JUSTIN B 3200 CHERRY CREEK SOUTH DRIVE SUITE 670 DENVER CO 80209 0 0 1 0 0001232118 LAZARUS INVESTMENT PARTNERS LLLP 3200 CHERRY CREEK SOUTH DRIVE SUITE 670 DENVER CO 80209 0 0 1 0 Warrant (right to buy) 1.40 2015-04-24 4 J 0 1250000 0.00 D 2011-04-13 2015-10-13 Common Stock 1250000 0 I See Footnotes Warrant (right to buy) 0.25 2015-04-24 4 J 0 1250000 0.00 A 2015-04-24 2019-10-25 Common Stock 1250000 1250000 I See Footnotes Warrant (right to buy) 2.00 2015-04-24 4 J 0 357142 0.00 D 2012-04-13 2016-04-13 Common Stock 357142 0 I See Footnotes Warrant (right to buy) 0.25 2015-04-24 4 J 0 357142 0.00 A 2015-04-24 2019-10-25 Common Stock 357142 357142 I See Footnotes Warrant (right to buy) 1.34 2015-04-24 4 J 0 746268 0.00 D 2012-09-14 2017-03-14 Common Stock 746268 0 I See Footnotes Warrant (right to buy) 0.25 2015-04-24 4 J 0 746268 0.00 A 2015-04-24 2019-10-25 Common Stock 746268 746268 I See Footnotes Warrant (right to buy) 1.60 2015-04-24 4 J 0 330000 0.00 D 2012-10-10 2017-04-10 Common Stock 330000 0 I See Footnotes Warrant (right to buy) 0.25 2015-04-24 4 J 0 330000 0.00 A 2015-04-24 2019-10-25 Common Stock 330000 330000 I See Footnotes Warrant (right to buy) 1.34 2015-04-24 4 J 0 1317830 0.00 D 2013-03-28 2017-09-28 Common Stock 1317830 0 I See Footnotes Warrant (right to buy) 0.25 2015-04-24 4 J 0 1317830 0.00 A 2015-04-24 2019-10-25 Common Stock 1317830 1317830 I See Footnotes Warrant (right to buy) 0.95 2015-04-24 4 J 0 2000000 0.00 D 2013-12-20 2018-06-20 Common Stock 2000000 0 I See Footnotes Warrant (right to buy) 0.25 2015-04-24 4 J 0 2000000 0.00 A 2015-05-07 2019-10-25 Common Stock 2000000 2000000 I See Footnotes Warrant (right to buy) 0.8875 2015-04-24 4 J 0 232394 0.00 D 2015-03-03 2019-09-03 Common Stock 232394 0 I See Footnotes Warrant (right to buy) 0.25 2015-04-24 4 J 0 232394 0.00 A 2015-05-07 2019-10-25 Common Stock 232394 232394 I See Footnotes The reported transactions involve an amendment of the warrants to amend the exercise price and expiration date, resulting in the deemed cancellation of the old warrant and the simultaneous issuance of the new warrant for purposes of Section 16. This form is filed jointly by Lazarus Management Company LLC ("Lazarus Management"), Justin B. Borus and Lazarus Investment Partners LLLP ("Lazarus Partners"). The securities reported herein are owned directly by Lazarus Partners. Lazarus Management is the investment adviser and general partner of Lazarus Partners and Mr. Borus is the managing member of Lazarus Management. Each of Lazarus Management and Mr. Borus expressly disclaims beneficial ownership of the securities held by Lazarus Partners except to the extent of his or its pecuniary interest therein. The filing of this Form 4 shall not be construed as an admission that either Lazarus Management or Mr. Borus, for purposes of Section 16 of the Securities Exchange Act of 1934 or otherwise, are the beneficial owner of any of the securities reported herein. Lazarus Management Company LLC By: /s/ Justin B. Borus, managing member 2015-04-28 /s/ Justin B. Borus 2015-04-28 Lazarus Investment Partners LLLP By: Lazarus Management Company LLC, its general partner By: /s/ Justin B. Borus, managing member 2015-04-28