| SC 13G/A | 2017-04-10 | FIRST TRUST PORTFOLIOS LP | FIRST TRUST EXCHANGE-TRADED FUND | 9,376,491 | 29.5% | EDGAR |
| SC 13G/A | 2017-01-13 | J.J.B. Hilliard, W.L. Lyons, LLC | FIRST TRUST EXCHANGE-TRADED FUND | 152,400 | 6.2% | EDGAR |
| SC 13G/A | 2017-01-12 | FIRST TRUST PORTFOLIOS LP | FIRST TRUST EXCHANGE-TRADED FUND | 7,007,643 | 16.0% | EDGAR |
| SC 13G/A | 2017-01-11 | FIRST TRUST PORTFOLIOS LP | FIRST TRUST EXCHANGE-TRADED FUND | 2,486,824 | 51.8% | EDGAR |
| SC 13G/A | 2017-01-11 | FIRST TRUST PORTFOLIOS LP | FIRST TRUST EXCHANGE-TRADED FUND | 10,845,422 | 36.3% | EDGAR |
| SC 13G | 2016-12-09 | FIRST TRUST PORTFOLIOS LP | FIRST TRUST EXCHANGE-TRADED FUND | 11,267,338 | 38.6% | EDGAR |
| SC 13G/A | 2016-08-10 | FIRST TRUST PORTFOLIOS LP | FIRST TRUST EXCHANGE-TRADED FUND | 1,015 | 0.0% | EDGAR |
| SC 13G/A | 2016-04-29 | FIRST TRUST PORTFOLIOS LP | FIRST TRUST EXCHANGE-TRADED FUND | 13,516,506 | 20.6% | EDGAR |
| SC 13G | 2016-01-27 | J.J.B. Hilliard, W.L. Lyons, LLC | FIRST TRUST EXCHANGE-TRADED FUND | 149,568 | 5.5% | EDGAR |
| SC 13G/A | 2016-01-11 | FIRST TRUST PORTFOLIOS LP | FIRST TRUST EXCHANGE-TRADED FUND | 10,731,173 | 35.3% | EDGAR |
| SC 13G/A | 2016-01-11 | FIRST TRUST PORTFOLIOS LP | FIRST TRUST EXCHANGE-TRADED FUND | 13,518,577 | 20.6% | EDGAR |
| SC 13G/A | 2016-01-08 | FIRST TRUST PORTFOLIOS LP | FIRST TRUST EXCHANGE-TRADED FUND | 4,289,802 | 55.0% | EDGAR |
| SC 13G/A | 2015-11-10 | FIRST TRUST PORTFOLIOS LP | FIRST TRUST EXCHANGE-TRADED FUND | 9,899,045 | 33.7% | EDGAR |
| SC 13G/A | 2015-08-10 | FIRST TRUST PORTFOLIOS LP | FIRST TRUST EXCHANGE-TRADED FUND | 11,474,272 | 24.5% | EDGAR |
| SC 13G/A | 2015-07-10 | FIRST TRUST PORTFOLIOS LP | FIRST TRUST EXCHANGE-TRADED FUND | 8,075,591 | 27.8% | EDGAR |
| SC 13G/A | 2015-06-10 | FIRST TRUST PORTFOLIOS LP | FIRST TRUST EXCHANGE-TRADED FUND | 4,564,839 | 47.6% | EDGAR |
| SC 13G/A | 2015-05-08 | FIRST TRUST PORTFOLIOS LP | FIRST TRUST EXCHANGE-TRADED FUND | 2,592,958 | 35.3% | EDGAR |
| SC 13G/A | 2015-04-10 | FIRST TRUST PORTFOLIOS LP | FIRST TRUST EXCHANGE-TRADED FUND | 5,801,953 | 21.8% | EDGAR |
| SC 13G/A | 2015-04-10 | FIRST TRUST PORTFOLIOS LP | FIRST TRUST EXCHANGE-TRADED FUND | 7,318,041 | 18.6% | EDGAR |
| SC 13G/A | 2015-04-10 | FIRST TRUST PORTFOLIOS LP | FIRST TRUST EXCHANGE-TRADED FUND | 921,834 | 19.0% | EDGAR |