| SC 13G/A | 2017-01-24 | BlackRock Inc. | GARTNER INC | 7,796,236 | 9.4% | EDGAR |
| SC 13G/A | 2016-02-16 | BAMCO INC /NY/ | GARTNER INC | 7,915,682 | 9.6% | EDGAR |
| SC 13G/A | 2016-02-11 | PRICE T ROWE ASSOCIATES INC /MD/ | GARTNER INC | 5,686,174 | 6.8% | EDGAR |
| SC 13G/A | 2016-02-10 | BlackRock Inc. | GARTNER INC | 7,043,271 | 8.5% | EDGAR |
| SC 13G/A | 2016-02-10 | VANGUARD GROUP INC | GARTNER INC | 6,267,019 | 7.6% | EDGAR |
| SC 13G/A | 2015-07-10 | BAMCO INC /NY/ | GARTNER INC | 8,009,521 | 9.6% | EDGAR |
| SC 13G/A | 2015-04-10 | BAMCO INC /NY/ | GARTNER INC | 8,081,689 | 9.2% | EDGAR |
| SC 13G/A | 2015-02-17 | BAMCO INC /NY/ | GARTNER INC | 8,374,389 | 9.5% | EDGAR |
| SC 13G/A | 2015-02-13 | PRICE T ROWE ASSOCIATES INC /MD/ | GARTNER INC | 8,039,310 | 9.1% | EDGAR |
| SC 13G/A | 2015-02-12 | MORGAN STANLEY | GARTNER INC | 3,861,271 | 4.4% | EDGAR |
| SC 13G/A | 2015-02-10 | VANGUARD GROUP INC | GARTNER INC | 5,907,162 | 6.7% | EDGAR |
| SC 13G/A | 2015-02-09 | BlackRock Inc. | GARTNER INC | 5,407,198 | 6.1% | EDGAR |
| SC 13G/A | 2015-01-09 | BAMCO INC /NY/ | GARTNER INC | 8,374,389 | 9.5% | EDGAR |
| SC 13G/A | 2014-02-14 | BAMCO INC /NY/ | GARTNER INC | 8,564,081 | 9.3% | EDGAR |
| SC 13G/A | 2014-02-11 | PRICE T ROWE ASSOCIATES INC /MD/ | GARTNER INC | 10,553,026 | 11.4% | EDGAR |
| SC 13G/A | 2014-02-11 | MORGAN STANLEY | GARTNER INC | 5,776,334 | 6.3% | EDGAR |
| SC 13G/A | 2014-02-11 | VANGUARD GROUP INC | GARTNER INC | 5,702,692 | 6.2% | EDGAR |
| SC 13G/A | 2014-01-29 | BlackRock Inc. | GARTNER INC | 5,542,917 | 6.0% | EDGAR |
| SC 13G/A | 2013-02-14 | BAMCO INC /NY/ | GARTNER INC | 8,052,428 | 8.6% | EDGAR |
| SC 13G/A | 2013-02-13 | MORGAN STANLEY | GARTNER INC | 5,977,885 | 6.4% | EDGAR |