| Company | Symbol | Filed By | Filing Date | Filing |
|---|---|---|---|---|
| William Blair Investment Management, Llc | 2020-02-10 | |||
| William Blair Investment Management, Llc | 2019-02-13 | |||
| Blackrock Inc. | 2019-01-24 | |||
| Vanguard Group Inc | 2019-01-10 | |||
| William Blair Investment Management, Llc | 2018-02-13 |