| SC 13G/A | 2020-02-12 | VANGUARD GROUP INC | GTT Communications, Inc. | 3,263,513 | 5.8% | EDGAR |
| SC 13D/A | 2019-12-16 | SPRUCE HOUSE INVESTMENT MANAGEMENT LLC | GTT Communications, Inc. | 15,875,000 | - | EDGAR |
| SC 13D/A | 2019-12-05 | SPRUCE HOUSE INVESTMENT MANAGEMENT LLC | GTT Communications, Inc. | 15,075,000 | - | EDGAR |
| SC 13D/A | 2019-11-29 | SPRUCE HOUSE INVESTMENT MANAGEMENT LLC | GTT Communications, Inc. | 13,945,000 | - | EDGAR |
| SC 13D/A | 2019-08-15 | SPRUCE HOUSE INVESTMENT MANAGEMENT LLC | GTT Communications, Inc. | 13,425,000 | - | EDGAR |
| SC 13D/A | 2019-04-23 | SPRUCE HOUSE INVESTMENT MANAGEMENT LLC | GTT Communications, Inc. | 12,375,000 | 22.2% | EDGAR |
| SC 13G | 2019-02-14 | PRICE T ROWE ASSOCIATES INC /MD/ | GTT Communications, Inc. | 3,997,803 | 7.3% | EDGAR |
| SC 13G/A | 2019-02-13 | Aleph Tiger Investors LP | GTT Communications, Inc. | 3,948,449 | 7.2% | EDGAR |
| SC 13G/A | 2019-02-13 | BAMCO INC /NY/ | GTT Communications, Inc. | 2,500,000 | 4.6% | EDGAR |
| SC 13G/A | 2019-02-11 | BlackRock Inc. | GTT Communications, Inc. | 2,691,342 | 4.9% | EDGAR |
| SC 13G | 2019-02-11 | VANGUARD GROUP INC | GTT Communications, Inc. | 3,834,219 | 7.0% | EDGAR |
| SC 13G | 2019-02-08 | BlackRock Inc. | GTT Communications, Inc. | 2,758,597 | 5.0% | EDGAR |
| SC 13D/A | 2019-01-18 | SPRUCE HOUSE INVESTMENT MANAGEMENT LLC | GTT Communications, Inc. | 11,857,000 | - | EDGAR |
| SC 13D | 2018-12-24 | SPRUCE HOUSE INVESTMENT MANAGEMENT LLC | GTT Communications, Inc. | 10,900,000 | - | EDGAR |
| SC 13G/A | 2018-11-13 | SPRUCE HOUSE INVESTMENT MANAGEMENT LLC | GTT Communications, Inc. | 10,900,000 | 19.9% | EDGAR |
| SC 13G | 2018-06-11 | Aleph Tiger Investors LP | GTT Communications, Inc. | 3,948,449 | 7.2% | EDGAR |
| SC 13G/A | 2018-06-01 | SPRUCE HOUSE INVESTMENT MANAGEMENT LLC | GTT Communications, Inc. | 7,835,637 | 14.4% | EDGAR |
| SC 13G/A | 2018-02-14 | GILDER GAGNON HOWE & CO LLC | GTT Communications, Inc. | 1,917,646 | 4.4% | EDGAR |
| SC 13G | 2018-02-14 | BAMCO INC /NY/ | GTT Communications, Inc. | 2,500,000 | 5.8% | EDGAR |
| SC 13G | 2017-11-13 | SPRUCE HOUSE INVESTMENT MANAGEMENT LLC | GTT Communications, Inc. | 4,000,000 | 9.2% | EDGAR |