| SC 13G/A | 2019-02-12 | WELLINGTON MANAGEMENT GROUP LLP | STERIS plc | 4,742,843 | 5.6% | EDGAR |
| SC 13G/A | 2019-02-12 | JANUS HENDERSON GROUP PLC | STERIS plc | 7,341,196 | 8.7% | EDGAR |
| SC 13G/A | 2019-02-11 | VANGUARD GROUP INC | STERIS plc | 7,702,293 | 9.1% | EDGAR |
| SC 13G/A | 2019-01-10 | BlackRock Inc. | STERIS plc | 8,549,361 | 10.1% | EDGAR |
| SC 13G/A | 2018-02-12 | JANUS HENDERSON GROUP PLC | STERIS plc | 7,991,373 | 9.4% | EDGAR |
| SC 13G/A | 2018-02-08 | VANGUARD GROUP INC | STERIS plc | 7,107,850 | 8.4% | EDGAR |
| SC 13G | 2018-02-08 | WELLINGTON MANAGEMENT GROUP LLP | STERIS plc | 5,874,925 | 6.9% | EDGAR |
| SC 13G/A | 2018-01-30 | BlackRock Inc. | STERIS plc | 7,184,409 | 8.4% | EDGAR |
| SC 13G/A | 2017-06-12 | JANUS CAPITAL MANAGEMENT LLC | Steris plc | 0 | 0.0% | EDGAR |
| SC 13G | 2017-06-12 | JANUS HENDERSON GROUP PLC | Steris plc | 7,790,141 | 9.2% | EDGAR |
| SC 13G/A | 2017-02-13 | JANUS CAPITAL MANAGEMENT LLC | Steris plc | 8,635,978 | 10.1% | EDGAR |
| SC 13G/A | 2017-02-10 | VANGUARD GROUP INC | Steris plc | 7,093,641 | 8.3% | EDGAR |
| SC 13G/A | 2017-01-27 | BlackRock Inc. | Steris plc | 4,920,695 | 5.8% | EDGAR |
| SC 13G | 2016-12-07 | JANUS CAPITAL MANAGEMENT LLC | Steris plc | 8,557,828 | 10.0% | EDGAR |
| SC 13G | 2016-02-10 | VANGUARD GROUP INC | Steris plc | 6,038,741 | 7.0% | EDGAR |
| SC 13G/A | 2016-01-27 | BlackRock Inc. | Steris plc | 7,508,512 | 8.8% | EDGAR |