| Type | Filed | Filer | Subject | Shares Owned | Percent Owned | |
|---|---|---|---|---|---|---|
| SC 13G | 2016-02-16 | DISCIPLINED GROWTH INVESTORS INC /MN | ULTRA PETROLEUM CORP | 13,909,484 | 9.0% | EDGAR |
| SC 13G/A | 2016-02-12 | DAVIS SELECTED ADVISERS | ULTRA PETROLEUM CORP | 16,881,017 | 11.0% | EDGAR |
| SC 13G/A | 2016-02-11 | VANGUARD GROUP INC | ULTRA PETROLEUM CORP | 10,309,154 | 6.7% | EDGAR |
| SC 13G/A | 2016-02-10 | HARRIS ASSOCIATES L P | ULTRA PETROLEUM CORP | 11,200 | 0.0% | EDGAR |
| SC 13G/A | 2016-02-10 | BAILLIE GIFFORD & CO | ULTRA PETROLEUM CORP | 14,856,705 | 9.7% | EDGAR |
| SC 13G/A | 2016-02-08 | Invesco Ltd. | ULTRA PETROLEUM CORP | 12,168,192 | 7.9% | EDGAR |
| SC 13G | 2016-01-28 | BlackRock Inc. | ULTRA PETROLEUM CORP | 8,688,079 | 5.7% | EDGAR |
| SC 13G/A | 2015-03-04 | BAILLIE GIFFORD & CO | ULTRA PETROLEUM CORP | 15,375,313 | 10.1% | EDGAR |
| SC 13G/A | 2015-02-17 | CITADEL ADVISORS LLC | ULTRA PETROLEUM CORP | - | 0.2% | EDGAR |
| SC 13G/A | 2015-02-13 | Capital Research Global Investors | ULTRA PETROLEUM CORP | - | 0.0% | EDGAR |
| SC 13G | 2015-02-12 | HARRIS ASSOCIATES L P | ULTRA PETROLEUM CORP | 8,052,933 | 5.3% | EDGAR |
| SC 13G/A | 2015-02-11 | DAVIS SELECTED ADVISERS | ULTRA PETROLEUM CORP | 19,598,377 | 12.8% | EDGAR |
| SC 13G/A | 2015-02-10 | Invesco Ltd. | ULTRA PETROLEUM CORP | 11,899,621 | 7.8% | EDGAR |
| SC 13G/A | 2015-02-10 | VANGUARD GROUP INC | ULTRA PETROLEUM CORP | 8,925,344 | 5.8% | EDGAR |
| SC 13G/A | 2015-02-10 | BAILLIE GIFFORD & CO | ULTRA PETROLEUM CORP | 15,226,765 | 9.9% | EDGAR |
| SC 13G | 2014-09-08 | DAVIS SELECTED ADVISERS | ULTRA PETROLEUM CORP | 19,368,554 | 12.6% | EDGAR |
| SC 13G | 2014-05-02 | CITADEL ADVISORS LLC | ULTRA PETROLEUM CORP | - | 5.5% | EDGAR |
| SC 13G/A | 2014-02-13 | Capital Research Global Investors | ULTRA PETROLEUM CORP | 13,868,000 | 9.1% | EDGAR |
| SC 13G | 2014-02-12 | VANGUARD GROUP INC | ULTRA PETROLEUM CORP | 10,394,623 | 6.8% | EDGAR |
| SC 13G | 2014-02-11 | Invesco Ltd. | ULTRA PETROLEUM CORP | 8,728,759 | 5.7% | EDGAR |