| SC 13G | 2018-08-02 | Sand Grove Capital Management LLP | MITEL NETWORKS CORP | 5,685,672 | 4.6% | EDGAR |
| SC 13G/A | 2018-06-06 | River Road Asset Management, LLC | MITEL NETWORKS CORP | 3,804,763 | 3.1% | EDGAR |
| SC 13G | 2018-06-01 | Sand Grove Capital Management LLP | MITEL NETWORKS CORP | 6,712,300 | 5.5% | EDGAR |
| SC 13G/A | 2018-05-10 | NWQ INVESTMENT MANAGEMENT COMPANY, LLC | MITEL NETWORKS CORP | 6,034,466 | 5.0% | EDGAR |
| SC 13G/A | 2018-05-10 | Capital Research Global Investors | MITEL NETWORKS CORP | 3,500,000 | 2.9% | EDGAR |
| SC 13G/A | 2018-02-14 | ELLIOTT ASSOCIATES, L.P. | MITEL NETWORKS CORP | 2,681,868 | 2.2% | EDGAR |
| SC 13G | 2018-02-14 | Connor, Clark & Lunn Investment Management Ltd. | MITEL NETWORKS CORP | - | - | EDGAR |
| SC 13G/A | 2018-02-13 | NWQ INVESTMENT MANAGEMENT COMPANY, LLC | MITEL NETWORKS CORP | 10,813,417 | 9.0% | EDGAR |
| SC 13G/A | 2018-02-12 | GUARDIAN CAPITAL LP | MITEL NETWORKS CORP | 5,074,956 | 4.2% | EDGAR |
| SC 13G/A | 2018-02-09 | Turtle Creek Asset Management Inc. | MITEL NETWORKS CORP | 0 | 0.0% | EDGAR |
| SC 13G/A | 2018-02-09 | Capital Research Global Investors | MITEL NETWORKS CORP | 12,688,632 | 10.5% | EDGAR |
| SC 13G | 2018-02-09 | River Road Asset Management, LLC | MITEL NETWORKS CORP | 6,825,374 | 5.7% | EDGAR |
| SC 13G | 2018-02-09 | Capital Research Global Investors | MITEL NETWORKS CORP | 10,433,900 | 8.6% | EDGAR |
| SC 13G | 2017-10-05 | ELLIOTT ASSOCIATES, L.P. | MITEL NETWORKS CORP | 3,360,332 | 2.8% | EDGAR |
| SC 13D/A | 2017-08-18 | Francisco Partners Parallel Fund II, L.P. | MITEL NETWORKS CORP | 4,111,306 | 3.5% | EDGAR |
| SC 13D/A | 2017-03-20 | Francisco Partners Parallel Fund II, L.P. | MITEL NETWORKS CORP | 6,281,568 | 5.2% | EDGAR |
| SC 13G | 2017-02-14 | Turtle Creek Asset Management Inc. | MITEL NETWORKS CORP | 8,385,097 | 6.9% | EDGAR |
| SC 13G | 2017-02-14 | GUARDIAN CAPITAL LP | MITEL NETWORKS CORP | 6,891,479 | 5.7% | EDGAR |
| SC 13G/A | 2017-02-03 | NWQ INVESTMENT MANAGEMENT COMPANY, LLC | MITEL NETWORKS CORP | 15,095,919 | 12.4% | EDGAR |
| SC 13G/A | 2017-02-01 | Invesco Ltd. | MITEL NETWORKS CORP | 5,059,179 | 4.2% | EDGAR |