STERIS plc
US ˙ NYSE

SecuritySTE / STERIS plc
InstitutionAssetmark, Inc
Latest Disclosed Ownership13,626 shares
Latest Disclosed Value $ 3,013,203
Assetmark, Inc reports 9.69% decrease in ownership of STE / STERIS plc

On May 6, 2026 - Assetmark, Inc filed a 13F-HR form disclosing ownership of 13,626 shares of STERIS plc (US:STE) valued at $3,013,117 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 23, 2026 disclosing 15,088 shares of STERIS plc. This represents a change in shares of -9.69% during the quarter. The current value of the position is $2,891,982 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-06 2026-03-31 13F STERIS SHS USD G8473T100 13,626 -1,462 -9.69 3,013 -21.23 0.0061
2026-01-23 2025-12-31 13F STERIS SHS USD G8473T100 15,088 497 3.41 3,825 5.96 0.0078
2025-11-06 2025-09-30 13F STERIS SHS USD G8473T100 14,591 -4,003 -21.53 3,610 -19.17 0.0077
2025-08-04 2025-06-30 13F STERIS SHS USD G8473T100 18,594 1,687 9.98 4,467 16.54 0.0105
2025-05-06 2025-03-31 13F STERIS SHS USD G8473T100 16,907 -563 -3.22 3,832 6.71 0.0105
2025-02-06 2024-12-31 13F STERIS SHS USD G8473T100 17,470 4,060 30.28 3,591 10.42 0.0098
2024-11-01 2024-09-30 13F STERIS SHS USD G8473T100 13,410 2,647 24.59 3,252 37.68 0.0093
2024-08-13 2024-06-30 13F STERIS SHS USD G8473T100 10,763 16 0.15 2,363 -2.24 0.0073
2024-05-07 2024-03-31 13F STERIS SHS USD G8473T100 10,747 713 7.11 2,416 9.57 0.0079
2024-02-09 2023-12-31 13F STERIS SHS USD G8473T100 10,034 354 3.66 2,206 3.86 0.0080
2023-10-27 2023-09-30 13F STERIS SHS USD G8473T100 9,680 892 10.15 2,124 7.38 0.0085
2023-08-11 2023-06-30 13F STERIS PLC SHS USD SHS USD G8473T100 8,788 724 8.98 1,977 28.21 0.0078
2023-05-05 2023-03-31 13F STERIS PLC SHS USD SHS USD G8473T100 8,064 -3,027 -27.29 1,542 -24.71 0.0064
2023-02-10 2022-12-31 13F STERIS SHS USD G8473T100 11,091 3,117 39.09 2,048 54.45 0.0089
2022-11-01 2022-09-30 13F STERIS SHS USD G8473T100 7,974 1,860 30.42 1,326 5.24 0.0062
2022-08-03 2022-06-30 13F STERIS PLC SHS USD SHS USD G8473T100 6,114 1,862 43.79 1,260 22.57 0.0056
2022-05-13 2022-03-31 13F STERIS PLC SHS USD SHS USD G8473T100 4,252 2,483 140.36 1,028 138.52 0.0043
2022-02-14 2021-12-31 13F STERIS PLC SHS USD SHS USD G8473T100 1,769 1,618 1,071.52 431 1,290.32 0.0018
2021-11-12 2021-09-30 13F STERIS PLC SHS USD SHS G8473T100 151 140 1,272.73 31 1,450.00 0.0001
2021-08-16 2021-06-30 13F STERIS PLC SHS USD ETF G8473T100 11 -34 -75.56 2 -77.78 0.0000
2021-05-14 2021-03-31 13F STERIS ETF G8473T100 45 -89 -66.42 9 -64.00 0.0000
2021-02-10 2020-12-31 13F STERIS PLC SHS USD ETF G8473T100 134 24 21.82 25 31.58 0.0001
2020-11-13 2020-09-30 13F STERIS PLC SHS USD ETF G8473T100 110 98 816.67 19 850.00 0.0001
2020-08-11 2020-06-30 13F STERIS PLC SHS USD ETF G8473T100 12 12 2 0.0000
2020-05-12 2020-03-31 13F STERIS PLC SHS USD SHS G8473T100 0 -43 -100.00 0 -100.00
2020-02-11 2019-12-31 13F STERIS PLC SHS USD SHS G8473T100 43 0 0.00 7 16.67 0.0001
2019-11-13 2019-09-30 13F STERIS PLC SHS USD SHS G8473T100 43 43 6 0.0001
2019-05-14 2019-03-31 13F STERIS PLC SHS USD COM G84720104 0 -20 -100.00 0 -100.00
2019-02-13 2018-12-31 13F STERIS PLC SHS USD COM G84720104 20 -91 -81.98 2 -84.62 0.0000
2018-11-13 2018-09-30 13F STERIS PLC SHS USD COM G84720104 111 -5 -4.31 13 8.33 0.0001
2018-08-01 2018-06-30 13F STERIS PLC SHS USD COM G84720104 116 13 12.62 12 20.00 0.0001
2018-05-16 2018-03-31 13F STERIS PLC SHS USD COM G84720104 103 64 164.10 10 233.33 0.0001
2018-02-13 2017-12-31 13F STERIS PLC SHS USD COM G84720104 39 -25 -39.06 3 -50.00 0.0000
2017-11-08 2017-09-30 13F STERIS PLC SHS USD COM G84720104 64 -1 -1.54 6 20.00 0.0001
2017-08-14 2017-06-30 13F STERIS PLC SHS USD COM G84720104 65 0 0.00 5 0.00 0.0001
2017-09-15 2017-03-31 13F/A-1 STERIS PLC SHS USD COM G84720104 65 -82 -55.78 5 -50.00 0.0001
2017-05-08 2017-03-31 13F STERIS PLC SHS USD COM G84720104 65 -82 5
2017-09-15 2016-12-31 13F/A-1 STERIS PLC SHS USD COM G84720104 147 -23 -13.53 10 -16.67 0.0001
2017-02-14 2016-12-31 13F STERIS PLC SHS USD COM G84720104 147 -23 10
2017-09-14 2016-09-30 13F/A-1 STERIS PLC SHS USD COM G84720104 170 11 6.92 12 9.09 0.0002
2016-11-04 2016-09-30 13F STERIS PLC SHS USD COM G84720104 170 11 12
2017-09-14 2016-06-30 13F/A-1 STERIS PLC SHS USD COM G84720104 159 0 0.00 11 0.00 0.0002
2016-08-08 2016-06-30 13F STERIS PLC SHS USD COM G84720104 159 0 11
2017-09-14 2016-03-31 13F/A-1 STERIS PLC SHS USD COM G84720104 159 -77 -32.63 11 -38.89 0.0002
2016-05-13 2016-03-31 13F STERIS PLC SHS USD COM G84720104 159 -77 11
2017-09-14 2015-12-31 13F/A-1 STERIS PLC SHS USD ADDED COM G84720104 236 -100 -29.76 18 -18.18 0.0003
2016-02-12 2015-12-31 13F STERIS PLC SHS USD ADDED COM G84720104 236 -100 18
2016-01-05 2015-09-30 13F/A-1 STERIS CORP COM COM 859152100 336 3 0.90 22 4.76 0.0005
2015-11-10 2015-09-30 13F STERIS CORP COM COM 859152100 336 22
2015-08-13 2015-06-30 13F STERIS CORP COM COM 859152100 333 333 21 0.0004
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.