| Date Filed | Type | Description |
| 02/11/2013 |
SC 13G/A
| Versant Affiliates Fund II-A, LP reports a 18.8% stake in Helicos Biosciences Corporation |
| 12/10/2012 |
8-K
| Changes in Registrant's Certifying Accountant, Financial Statements and Exhibits |
| 11/15/2012 |
8-K
| Quarterly results |
| 11/15/2012 |
NT 10-Q
| Form NT 10-Q - Notification of inability to timely file Form 10-Q or 10-QSB |
| 09/06/2012 |
8-K
| Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements... |
| 08/31/2012 |
8-K
| Other Events |
| 08/29/2012 |
8-K
| Entry into a Material Definitive Agreement, Departure of Directors or Certain Officers; Election of Directors; Appointment of... |
| 08/14/2012 |
10-Q
| Quarterly Report for the period ended June 30, 2012 |
| 08/06/2012 |
8-K
| Entry into a Material Definitive Agreement, Other Events, Financial Statements and Exhibits |
| 05/14/2012 |
10-Q
| Quarterly Report for the period ended March 31, 2012 |
| 04/17/2012 |
10-K/A
| Annual Report for the period ended December 31, 2011 [amend] |
| 04/10/2012 |
8-K
| Form 8-K - Current report |
| 03/30/2012 |
10-K
| Annual Report for the period ended December 31, 2011 |
| 03/09/2012 |
8-K
| Other Events |
| 02/10/2012 |
SC 13G/A
| Form SC 13G/A - Statement of acquisition of beneficial ownership by individuals: [Amend] |
| 01/10/2012 |
8-K
| Form 8-K - Current report |
| 12/01/2011 |
8-K
| Form 8-K - Current report |
| 11/16/2011 |
10-Q/A
| Quarterly Report for the period ended September 30, 2011 [amend] |
| 11/14/2011 |
10-Q
| Quarterly Report for the period ended September 30, 2011 |
| 11/09/2011 |
4
| Form 4 - Statement of changes in beneficial ownership of securities |
| 09/22/2011 |
8-K
| Form 8-K - Current report |
| 09/13/2011 |
8-K
| Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements... |
| 08/30/2011 |
8-K
| Entry into a Material Definitive Agreement, Regulation FD Disclosure, Financial Statements and Exhibits |
| 08/12/2011 |
10-Q
| Quarterly Report for the period ended June 30, 2011 |
| 06/30/2011 |
8-K
| Form 8-K - Current report |
| 05/13/2011 |
10-Q
| Quarterly Report for the period ended March 31, 2011 |
| 04/29/2011 |
8-K
| Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements... |
| 03/31/2011 |
10-K
| Annual Report for the period ended December 31, 2010 |
| 03/01/2011 |
8-K
| Form 8-K - Current report |
| 02/14/2011 |
SC 13G/A
| HELICOS BIOSCIENCES CORP reports a 19.8% stake in Helicos Biosciences Corporation |
| 01/25/2011 |
424B3
| Form 424B3 - Prospectus [Rule 424(b)(3)] |
| 01/21/2011 |
25-NSE
| Form 25-NSE - Notification filed by national security exchange to report the removal from listing and registration of matured, redeemed or retired securities |
| 01/05/2011 |
4
| Moore Jeffrey R. (SVP, CFO & Treasurer) has filed a Form 4 on HELICOS BIOSCIENCES CORP |
| 12/09/2010 |
SC 13D/A
| AGTC ADVISORS FUND LP reports a 19.9% stake in Helicos BioSciences Corporation |
|