| SC 13G/A | 2020-02-12 | VANGUARD GROUP INC | Zayo Group Holdings, Inc. | 21,623,662 | 9.1% | EDGAR |
| SC 13D/A | 2019-12-26 | BlackRock Inc. | Zayo Group Holdings, Inc. | 14,625,249 | 6.2% | EDGAR |
| SC 13G/A | 2019-10-09 | DODGE & COX | Zayo Group Holdings, Inc. | 4,150,114 | 1.8% | EDGAR |
| SC 13D | 2019-05-17 | Colony Capital, Inc. | Zayo Group Holdings, Inc. | 25,000 | - | EDGAR |
| SC 13D | 2019-05-17 | BlackRock Inc. | Zayo Group Holdings, Inc. | 12,140,295 | 5.2% | EDGAR |
| SC 13G/A | 2019-02-14 | DODGE & COX | Zayo Group Holdings, Inc. | 28,388,472 | 12.0% | EDGAR |
| SC 13G/A | 2019-02-11 | VANGUARD GROUP INC | Zayo Group Holdings, Inc. | 17,862,737 | 7.6% | EDGAR |
| SC 13G | 2019-02-08 | BlackRock Inc. | Zayo Group Holdings, Inc. | 12,265,299 | 5.2% | EDGAR |
| SC 13G/A | 2019-01-18 | GTCR FUND X/A LP | Zayo Group Holdings, Inc. | 0 | 0.0% | EDGAR |
| SC 13G/A | 2018-12-14 | SPO ADVISORY CORP | Zayo Group Holdings, Inc. | - | 0.0% | EDGAR |
| SC 13G/A | 2018-04-09 | DODGE & COX | Zayo Group Holdings, Inc. | 24,858,035 | 10.0% | EDGAR |
| SC 13G/A | 2018-02-14 | SPO ADVISORY CORP | Zayo Group Holdings, Inc. | 11,577,741 | 4.7% | EDGAR |
| SC 13G/A | 2018-02-14 | Capital World Investors | Zayo Group Holdings, Inc. | 11,948,000 | 4.8% | EDGAR |
| SC 13G/A | 2018-02-13 | DODGE & COX | Zayo Group Holdings, Inc. | 23,908,669 | 9.7% | EDGAR |
| SC 13G | 2018-02-09 | VANGUARD GROUP INC | Zayo Group Holdings, Inc. | 17,844,098 | 7.2% | EDGAR |
| SC 13G/A | 2017-03-20 | DODGE & COX | Zayo Group Holdings, Inc. | 14,566,252 | 6.0% | EDGAR |
| SC 13G | 2017-02-27 | SPO ADVISORY CORP | Zayo Group Holdings, Inc. | 11,663,541 | 4.8% | EDGAR |
| SC 13G | 2017-02-14 | DODGE & COX | Zayo Group Holdings, Inc. | 14,570,052 | 6.0% | EDGAR |
| SC 13G | 2017-02-13 | Capital World Investors | Zayo Group Holdings, Inc. | 17,269,233 | 7.1% | EDGAR |
| SC 13G/A | 2017-02-06 | COLUMBIA CAPITAL EQUITY PARTNERS IV QP L P | Zayo Group Holdings, Inc. | 0 | 0.0% | EDGAR |