| Type | Filed | Filer | Subject | Shares Owned | Percent Owned | |
|---|---|---|---|---|---|---|
| SC 13G/A | 2019-08-12 | Invesco Ltd. | Invesco Exchange-Traded Self-Indexed Fund Trust | 26,793,007 | 78.1% | EDGAR |
| SC 13G/A | 2019-07-10 | Invesco Ltd. | Invesco Exchange-Traded Self-Indexed Fund Trust | 26,959,288 | 68.2% | EDGAR |
| SC 13G | 2019-06-10 | Invesco Ltd. | Invesco Exchange-Traded Self-Indexed Fund Trust | 27,296,128 | 84.1% | EDGAR |