| Type | Filed | Filer | Subject | Shares Owned | Percent Owned | |
|---|---|---|---|---|---|---|
| SC 13G/A | 2016-01-06 | SABBY MANAGEMENT, LLC | ARCA biopharma, Inc. | 346,000 | 3.8% | EDGAR |
| SC 13G | 2015-07-09 | FRANKLIN RESOURCES INC | ARCA biopharma, Inc. | 8,517,888 | 13.7% | EDGAR |
| SC 13D | 2015-06-29 | Growth Equity Opportunities IV, LLC | ARCA biopharma, Inc. | 14,310,051 | 21.3% | EDGAR |
| SC 13G | 2015-06-25 | RA CAPITAL MANAGEMENT, LLC | ARCA biopharma, Inc. | 5,678,592 | 9.0% | EDGAR |
| SC 13G | 2015-06-25 | VENROCK HEALTHCARE CAPITAL PARTNERS LP | ARCA biopharma, Inc. | 10,789,324 | 17.1% | EDGAR |
| SC 13G/A | 2015-02-11 | mccormack riley | ARCA biopharma, Inc. | 1,050,000 | 5.0% | EDGAR |
| SC 13G/A | 2015-01-08 | SABBY MANAGEMENT, LLC | ARCA biopharma, Inc. | 2,112,934 | 10.0% | EDGAR |
| SC 13G/A | 2015-01-07 | mccormack riley | ARCA biopharma, Inc. | 2,450,000 | 11.6% | EDGAR |
| SC 13G/A | 2015-01-05 | mccormack riley | ARCA biopharma, Inc. | 3,000,000 | 14.2% | EDGAR |
| SC 13G/A | 2014-02-13 | Atlas Venture Fund VII L P | ARCA biopharma, Inc. | - | - | EDGAR |
| SC 13G/A | 2014-02-04 | BRISTOW MICHAEL R | ARCA biopharma, Inc. | 760,891 | 4.8% | EDGAR |
| SC 13G/A | 2014-01-16 | SABBY MANAGEMENT, LLC | ARCA biopharma, Inc. | 1,565,989 | 10.0% | EDGAR |
| SC 13G | 2013-10-07 | mccormack riley | ARCA biopharma, Inc. | 2,000,000 | 18.3% | EDGAR |
| SC 13G/A | 2013-06-14 | BRISTOW MICHAEL R | ARCA biopharma, Inc. | 720,643 | 7.4% | EDGAR |
| SC 13G | 2013-06-03 | SABBY MANAGEMENT, LLC | ARCA biopharma, Inc. | 318,238 | 10.0% | EDGAR |
| SC 13G/A | 2013-02-11 | Atlas Venture Fund VII L P | ARCA biopharma, Inc. | 1,893,025 | 12.3% | EDGAR |
| SC 13G/A | 2013-02-04 | BRISTOW MICHAEL R | ARCA biopharma, Inc. | 3,617,612 | 18.5% | EDGAR |
| SC 13G/A | 2013-01-28 | SABBY MANAGEMENT, LLC | ARCA biopharma, Inc. | 639,837 | 4.1% | EDGAR |
| SC 13G | 2012-12-28 | BRISTOW MICHAEL R | ARCA biopharma, Inc. | 1,798,153 | 10.8% | EDGAR |
| SC 13D | 2012-11-02 | Atlas Venture Fund VII L P | ARCA biopharma, Inc. | 1,893,025 | 12.0% | EDGAR |