| SC 13G/A | 2019-02-13 | RENAISSANCE TECHNOLOGIES LLC | RADISYS CORP | 0 | 0.0% | EDGAR |
| SC 13G/A | 2018-07-10 | BlackRock Inc. | RADISYS CORP | 834,314 | 2.1% | EDGAR |
| SC 13D/A | 2018-03-14 | VIEX Capital Advisors, LLC | RADISYS CORP | 1,899,443 | 4.8% | EDGAR |
| SC 13G/A | 2018-02-14 | RENAISSANCE TECHNOLOGIES LLC | RADISYS CORP | 3,094,099 | 7.9% | EDGAR |
| SC 13G/A | 2018-01-29 | BlackRock Inc. | RADISYS CORP | 2,563,415 | 6.5% | EDGAR |
| SC 13G/A | 2017-12-07 | HEARTLAND ADVISORS INC | RADISYS CORP | 1,637,100 | 4.2% | EDGAR |
| SC 13D/A | 2017-12-06 | VIEX Capital Advisors, LLC | RADISYS CORP | 3,167,365 | 8.1% | EDGAR |
| SC 13D | 2017-08-23 | VIEX Capital Advisors, LLC | RADISYS CORP | 2,288,357 | 5.9% | EDGAR |
| SC 13D/A | 2017-07-19 | Nierenberg Investment Management Company, Inc. | RADISYS CORP | 439,169 | 1.1% | EDGAR |
| SC 13G | 2017-02-14 | RENAISSANCE TECHNOLOGIES LLC | RADISYS CORP | 2,286,999 | 6.0% | EDGAR |
| SC 13D/A | 2017-02-02 | Nierenberg Investment Management Company, Inc. | RADISYS CORP | - | - | EDGAR |
| SC 13G | 2017-02-02 | HEARTLAND ADVISORS INC | RADISYS CORP | 2,826,538 | 7.4% | EDGAR |
| SC 13G/A | 2017-01-25 | BlackRock Inc. | RADISYS CORP | 3,126,469 | 8.1% | EDGAR |
| SC 13G/A | 2016-02-11 | WELLINGTON TRUST Co N A | RADISYS CORP | 0 | 0.0% | EDGAR |
| SC 13G/A | 2016-02-11 | Wellington Trust Company, National Association Multiple Common Trust Funds Trust, Micro Cap Equity Portfolio | RADISYS CORP | 0 | 0.0% | EDGAR |
| SC 13G/A | 2016-02-11 | WELLINGTON MANAGEMENT GROUP LLP | RADISYS CORP | 0 | 0.0% | EDGAR |
| SC 13G/A | 2016-02-03 | ROYCE & ASSOCIATES LLC | RADISYS CORP | 1,100,257 | 3.0% | EDGAR |
| SC 13G/A | 2016-02-03 | DIKER MANAGEMENT LLC | RADISYS CORP | 0 | 0.0% | EDGAR |
| SC 13G/A | 2016-01-27 | BlackRock Inc. | RADISYS CORP | 2,806,117 | 7.6% | EDGAR |
| SC 13D/A | 2015-10-30 | Vertex Capital Advisors, LLC | RADISYS CORP | 910,534 | 2.5% | EDGAR |