| SC 13D/A | 2015-07-06 | Lazarus Management Co LLC | AUTHENTIDATE HOLDING CORP | 14,763,708 | 29.5% | EDGAR |
| SC 13D/A | 2015-04-28 | Lazarus Management Co LLC | AUTHENTIDATE HOLDING CORP | 14,718,034 | 29.4% | EDGAR |
| SC 13G/A | 2015-02-12 | HIRSCHMAN ORIN | AUTHENTIDATE HOLDING CORP | 565,714 | 1.4% | EDGAR |
| SC 13D/A | 2014-12-12 | LAZARUS INVESTMENT PARTNERS LLLP | AUTHENTIDATE HOLDING CORP | 14,664,103 | 29.5% | EDGAR |
| SC 13D/A | 2014-09-16 | LAZARUS INVESTMENT PARTNERS LLLP | AUTHENTIDATE HOLDING CORP | 14,664,123 | 29.5% | EDGAR |
| SC 13D/A | 2014-09-04 | LAZARUS INVESTMENT PARTNERS LLLP | AUTHENTIDATE HOLDING CORP | 14,664,123 | 29.5% | EDGAR |
| SC 13G | 2014-02-13 | HIRSCHMAN ORIN | AUTHENTIDATE HOLDING CORP | 1,714,286 | 4.8% | EDGAR |
| SC 13D/A | 2013-10-22 | LAZARUS INVESTMENT PARTNERS LLLP | AUTHENTIDATE HOLDING CORP | 13,644,710 | 31.6% | EDGAR |
| SC 13D/A | 2013-04-12 | LAZARUS INVESTMENT PARTNERS LLLP | AUTHENTIDATE HOLDING CORP | 9,802,598 | 28.3% | EDGAR |
| SC 13D | 2013-04-12 | LAZARUS INVESTMENT PARTNERS LLLP | AUTHENTIDATE HOLDING CORP | 9,802,598 | 28.3% | EDGAR |
| SC 13G/A | 2013-02-14 | AQR CAPITAL MANAGEMENT LLC | AUTHENTIDATE HOLDING CORP | 0 | 0.0% | EDGAR |
| SC 13D/A | 2013-02-07 | LAZARUS INVESTMENT PARTNERS LLLP | AUTHENTIDATE HOLDING CORP | 8,381,982 | 27.0% | EDGAR |
| SC 13D | 2012-08-28 | LAZARUS INVESTMENT PARTNERS LLLP | AUTHENTIDATE HOLDING CORP | 14,127,181 | 23.8% | EDGAR |
| SC 13G/A | 2012-08-15 | LAZARUS INVESTMENT PARTNERS LLLP | AUTHENTIDATE HOLDING CORP | 8,760,359 | 16.2% | EDGAR |
| SC 13G/A | 2012-02-24 | AQR CAPITAL MANAGEMENT LLC | AUTHENTIDATE HOLDING CORP | 500,000 | 7.7% | EDGAR |
| SC 13G/A | 2012-02-13 | LAZARUS INVESTMENT PARTNERS LLLP | AUTHENTIDATE HOLDING CORP | 8,745,259 | 16.3% | EDGAR |
| SC 13G/A | 2012-02-08 | AQR CAPITAL MANAGEMENT LLC | AUTHENTIDATE HOLDING CORP | 0 | 0.0% | EDGAR |
| SC 13G/A | 2011-02-15 | LAZARUS INVESTMENT PARTNERS LLLP | AUTHENTIDATE HOLDING CORP | 5,835,991 | 12.7% | EDGAR |
| SC 13G | 2011-02-11 | AQR CAPITAL MANAGEMENT LLC | AUTHENTIDATE HOLDING CORP | 2,826,542 | 7.4% | EDGAR |
| SC 13G/A | 2011-02-01 | LAZARUS INVESTMENT PARTNERS LLLP | AUTHENTIDATE HOLDING CORP | 4,577,296 | 9.9% | EDGAR |