| SC 13G/A | 2011-02-03 | MARATHON ASSET MANAGEMENT LLP | GARTNER INC | 7,992,048 | 8.3% | EDGAR |
| SC 13G/A | 2011-01-13 | ROYCE & ASSOCIATES LLC | GARTNER INC | 5,584,100 | 5.8% | EDGAR |
| SC 13G | 2010-12-10 | PRICE T ROWE ASSOCIATES INC /MD/ | GARTNER INC | 9,720,700 | 10.1% | EDGAR |
| SC 13D/A | 2010-09-10 | VA Partners I, LLC | GARTNER INC | 16,790,013 | 17.6% | EDGAR |
| SC 13G/A | 2010-09-10 | BlackRock Inc. | GARTNER INC | 4,458,028 | 4.7% | EDGAR |
| SC 13G/A | 2010-02-10 | WELLS FARGO & CO/MN | GARTNER INC | 5,086,230 | 4.9% | EDGAR |
| SC 13G/A | 2010-02-03 | BAMCO INC /NY/ | GARTNER INC | 8,873,089 | 9.5% | EDGAR |
| SC 13G/A | 2010-02-02 | ROYCE & ASSOCIATES LLC | GARTNER INC | 5,891,100 | 5.7% | EDGAR |
| SC 13G | 2010-01-29 | MARATHON ASSET MANAGEMENT LLP | GARTNER INC | 7,183,161 | 6.9% | EDGAR |
| SC 13G | 2010-01-29 | BlackRock Inc. | GARTNER INC | 7,357,829 | 7.1% | EDGAR |
| SC 13G | 2010-01-20 | WELLS FARGO & CO/MN | GARTNER INC | 4,892,031 | 5.1% | EDGAR |
| SC 13D/A | 2009-12-14 | SILVER LAKE PARTNERS LP | GARTNER INC | 0 | 0.0% | EDGAR |
| SC 13D/A | 2009-11-19 | SILVER LAKE PARTNERS LP | GARTNER INC | 9,168,099 | 9.6% | EDGAR |
| SC 13D/A | 2009-08-12 | SILVER LAKE PARTNERS LP | GARTNER INC | 10,133,768 | 10.7% | EDGAR |
| SC 13D/A | 2009-06-17 | SILVER LAKE PARTNERS LP | GARTNER INC | 11,133,768 | 11.8% | EDGAR |
| SC 13G/A | 2009-02-12 | BAMCO INC /NY/ | GARTNER INC | 8,473,790 | 9.0% | EDGAR |
| SC 13G | 2009-01-26 | ROYCE & ASSOCIATES LLC | GARTNER INC | 5,475,600 | 5.8% | EDGAR |
| SC 13G/A | 2009-01-12 | MARATHON ASSET MANAGEMENT LLP | GARTNER INC | 7,027,240 | 7.5% | EDGAR |
| SC 13D/A | 2008-06-23 | SILVER LAKE PARTNERS LP | GARTNER INC | 13,225,518 | 14.0% | EDGAR |
| SC 13G | 2008-02-14 | BAMCO INC /NY/ | GARTNER INC | 6,402,700 | 6.1% | EDGAR |