| Type | Filed | Filer | Subject | Shares Owned | Percent Owned | |
|---|---|---|---|---|---|---|
| SC 13G/A | 2020-02-12 | VANGUARD WORLD FUND | TAL Education Group | 0 | 0.0% | EDGAR |
| SC 13G/A | 2019-01-31 | VANGUARD WORLD FUND | TAL Education Group | 18,485,132 | 5.2% | EDGAR |
| SC 13G/A | 2019-01-31 | VANGUARD WORLD FUND | IDT CORP | 431,678 | 1.9% | EDGAR |
| SC 13G/A | 2019-01-31 | VANGUARD WORLD FUND | pdvWireless, Inc. | 214,886 | 1.5% | EDGAR |
| SC 13G/A | 2019-01-31 | VANGUARD WORLD FUND | Spok Holdings, Inc | 480,132 | 2.5% | EDGAR |
| SC 13G/A | 2018-02-13 | FMR LLC | VANGUARD WORLD FUND | 4,965,272 | 4.8% | EDGAR |
| SC 13G/A | 2018-02-02 | VANGUARD WORLD FUND | pdvWireless, Inc. | 781,744 | 5.4% | EDGAR |
| SC 13G/A | 2018-02-02 | VANGUARD WORLD FUND | Spok Holdings, Inc | 1,120,755 | 5.6% | EDGAR |
| SC 13G | 2018-02-02 | VANGUARD WORLD FUND | IDT CORP | 1,427,073 | 6.1% | EDGAR |
| SC 13G | 2018-02-02 | VANGUARD WORLD FUND | TAL Education Group | 15,439,239 | 5.4% | EDGAR |
| SC 13G/A | 2018-01-10 | VANGUARD WORLD FUND | NII HOLDINGS INC | 1,355,950 | 1.3% | EDGAR |
| SC 13G/A | 2017-10-23 | VANGUARD WORLD FUND | NII HOLDINGS INC | 11,954,617 | 11.9% | EDGAR |
| SC 13G/A | 2017-03-10 | VANGUARD WORLD FUND | NII HOLDINGS INC | 11,954,617 | 12.0% | EDGAR |
| SC 13G | 2017-02-14 | FMR LLC | VANGUARD WORLD FUND | 5,928,828 | 7.2% | EDGAR |
| SC 13G | 2017-02-13 | VANGUARD WORLD FUND | FAIRPOINT COMMUNICATIONS INC | 1,426,565 | 5.3% | EDGAR |
| SC 13G | 2017-02-13 | VANGUARD WORLD FUND | Lumos Networks Corp. | 1,656,021 | 7.0% | EDGAR |
| SC 13G | 2017-02-13 | VANGUARD WORLD FUND | NII HOLDINGS INC | 8,945,812 | 8.9% | EDGAR |
| SC 13G | 2017-02-13 | VANGUARD WORLD FUND | pdvWireless, Inc. | 831,503 | 5.8% | EDGAR |
| SC 13G | 2017-02-13 | VANGUARD WORLD FUND | Spok Holdings, Inc | 1,198,428 | 5.8% | EDGAR |
| SC 13G/A | 2015-03-09 | BRINKER CAPITAL INC | VANGUARD WORLD FUND | 9,420 | 0.2% | EDGAR |