Sotera Health Company
US ˙ NasdaqGS ˙ US83601L1026

SecuritySHC / Sotera Health Company
InstitutionJanus Henderson Group Plc
Latest Disclosed Ownership9,162,191 shares
Latest Disclosed Value $ 131,413,330
Janus Henderson Group Plc reports 35.29% increase in ownership of SHC / Sotera Health Company

On May 18, 2026 - Janus Henderson Group Plc filed a 13F-HR/A form disclosing ownership of 9,162,191 shares of Sotera Health Company (US:SHC) valued at $131,385,819 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 6,772,059 shares of Sotera Health Company. This represents a change in shares of 35.29% during the quarter. The current value of the position is $142,655,314 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)
2026-05-18 2026-03-31 13F/A-1 SOTERA HEALTH COM 83601L102 9,162,191 2,390,132 35.29 131,413 10.01 0.0222
2026-05-15 2026-03-31 13F SOTERA HEALTH COM 83601L102 9,162,191 2,390,132 35.29 131,413 10.01 0.0244
2026-02-17 2025-12-31 13F SOTERA HEALTH COM 83601L102 6,772,059 312,191 4.83 119,460 17.56 0.0535
2025-11-14 2025-09-30 13F SOTERA HEALTH COM 83601L102 6,459,868 406,657 6.72 101,614 50.96 0.0464
2025-08-14 2025-06-30 13F SOTERA HEALTH COM 83601L102 6,053,211 -649,899 -9.70 67,311 -14.68 0.0330
2025-05-15 2025-03-31 13F SOTERA HEALTH COM 83601L102 6,703,110 -1,079,452 -13.87 78,896 -25.89 0.0432
2025-02-14 2024-12-31 13F SOTERA HEALTH COM 83601L102 7,782,562 -4,886,228 -38.57 106,464 -49.68 0.0541
2024-11-14 2024-09-30 13F SOTERA HEALTH COM 83601L102 12,668,790 -1,824,046 -12.59 211,567 22.98 0.1083
2024-08-14 2024-06-30 13F SOTERA HEALTH COM 83601L102 14,492,836 -400,032 -2.69 172,030 -3.82 0.0921
2024-05-15 2024-03-31 13F SOTERA HEALTH COM 83601L102 14,892,868 4,525,056 43.65 178,865 2.38 0.0976
2024-02-14 2023-12-31 13F SOTERA HEALTH COM 83601L102 10,367,812 1,627,408 18.62 174,698 33.43 0.1042
2023-11-14 2023-09-30 13F SOTERA HEALTH COM 83601L102 8,740,404 2,700,096 44.70 130,931 15.05 0.0857
2023-08-14 2023-06-30 13F SOTERA HEALTH COM 83601L102 6,040,308 3,420,646 130.58 113,800 142.55 0.0708
2023-05-15 2023-03-31 13F SOTERA HEALTH COM 83601L102 2,619,662 2,602,334 15,018.09 46,918 32,481.94 0.0309
2023-02-14 2022-12-31 13F SOTERA HEALTH COM 83601L102 17,328 -577,677 -97.09 145 -96.45 0.0001
2023-01-13 2022-09-30 13F/A-1 SOTERA HEALTH COM 83601L102 595,005 -595,235 -50.01 4,058 -82.60 0.0030
2022-11-14 2022-09-30 13F SOTERA HEALTH COM 83601L102 595,005 -595,235 4,058 0.0010
2022-08-15 2022-06-30 13F SOTERA HEALTH COM 83601L102 1,190,240 -184,458 -13.42 23,317 -21.69 0.0161
2022-05-16 2022-03-31 13F SOTERA HEALTH COM 83601L102 1,374,698 -233,796 -14.54 29,777 -21.39 0.0144
2022-02-14 2021-12-31 13F SOTERA HEALTH COM 83601L102 1,608,494 -90,370 -5.32 37,880 -14.73 0.0158
2021-11-16 2021-09-30 13F SOTERA HEALTH COM 83601L102 1,698,864 -86,690 -4.86 44,425 2.68 0.0194
2021-08-16 2021-06-30 13F SOTERA HEALTH COM 83601L102 1,785,554 -307,372 -14.69 43,264 -17.18 0.0185
2021-05-17 2021-03-31 13F SOTERA HEALTH COM 83601L102 2,092,926 -1,411,424 -40.28 52,239 -45.67 0.0238
2021-02-16 2020-12-31 13F SOTERA HEALTH COM 83601L102 3,504,350 3,504,350 96,159 0.0447
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.