0001628280-26-043587 | 11-K | XBRL Viewer

Risks and Uncertainties	12 Months Ended
Dec. 31, 2025
EBP 001
EBP, Risk and Uncertainty [Line Items]
EBP, Risk and Uncertainty [Text Block]	Risks and Uncertainties The Plan invests in various investment securities. Investment securities are exposed to various risks such as interest rate, market and credit risks. Due to the level of risk associated with certain investment securities, it is at least reasonably possible that changes in the values of investment securities will occur in the near term and that such changes could materially affect participants’ account balances and the amounts reported in the statements of net assets available for benefits. Participants are responsible for researching and judging for themselves the suitability of any particular security, transaction or investment strategy and the associated inherent risk of loss.

Fair Value Measurements

12 Months Ended

Dec. 31, 2025

EBP, Investment, Fair Value and NAV [Line Items]

EBP, Investment, Fair Value and NAV [Text Block]

Fair Value Measurements

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Investments are classified in a hierarchy based on the inputs to valuation techniques used in measuring fair value that maximizes the use of observable inputs and minimizes the use of unobservable inputs by requiring that the most observable inputs be used when available. The three levels of the fair value hierarchy are described below:

Level 1 - Unadjusted quoted prices for identical assets or liabilities in active markets.

Level 2 - Inputs to the valuation methodology include, quoted prices for similar assets or liabilities in active markets; quoted prices for identical or similar assets or liabilities in inactive markets; inputs other than quoted prices that are observable for the asset or liability; and inputs that are derived principally from or corroborated by observable market data by correlation or other means. If the asset or liability has a specified (contractual) term, the Level 2 input must be observable for substantially the full term of the asset or liability.

Level 3 - Inputs to the valuation methodology are unobservable and significant to the fair value measurement. These inputs reflect management's judgment about the assumptions that a market participant would use in pricing the investment and are based on the best available information, some of which may be internally developed.

The asset’s or liability’s fair value measurement level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement.

The following describes the valuation techniques used for assets measured at fair value.

Mutual funds: Valued at the price reported by the fund. Mutual funds held by the Plan have publicly available prices and are registered with the Securities and Exchange Commission. Money market fund holdings are valued and transacted at a net asset value (“NAV”). NAV is computed by dividing the total assets, minus liabilities, of the fund by the number of fund shares outstanding. The instruments held by a money market fund generally are valued on the basis of amortized cost, which does not take into account unrealized capital gains or losses.

STERIS Company Stock Fund: Valued based on the year end unit value; unit values were determined by the Trustee by dividing the fair values of the total net assets at year end by the outstanding units.

Collective Trusts: Valued at the NAV on the last business day of the Plan’s year end, which is provided by the Trustee of the fund and used as a practical expedient to estimate fair value. The NAV is based on the value of the underlying assets owned by the fund, minus its liabilities, divided by the number of units outstanding. Since these investments are measured at fair value using the NAV as a practical expedient, they are not classified in the fair value hierarchy.

The following tables set forth by level, within the fair value hierarchy, the Plan’s assets measured at fair value on a recurring basis as of December 31, 2025 and 2024:


	Total		Level 1		Level 2		Level 3
December 31, 2025
Cash	$	1,929,740	$	1,929,740	$	—	$	—
STERIS Company Stock Fund	86,104,555		86,104,555		—		—
Mutual Funds	116,844,083		65,511,981		51,332,102		—
Total assets in fair value hierarchy	$	204,878,378	$	153,546,276	$	51,332,102	$	—
Collective Trusts (1)	1,255,503,985		—		—		—
Total assets at fair value	$	1,460,382,363	$	153,546,276	$	51,332,102	$	—

(1) In accordance with Subtopic 820-10 of ASC 820 Fair Value Measurement, certain investments that were measured at net asset value per share as a practical expedient are not required to be classified in the fair value hierarchy. The fair value amounts are intended to permit reconciliation of the fair value hierarchy to the line item in the Statements of Net Assets Available for Benefits.


	Total		Level 1		Level 2		Level 3
December 31, 2024
Cash	$	1,436,271	$	1,436,271	$	—	$	—
STERIS Company Stock Fund	81,552,897		81,552,897		—		—
Mutual Funds	467,543,520		419,161,873		48,381,647		—
Total assets in fair value hierarchy	$	550,532,688	$	502,151,041	$	48,381,647	$	—
Collective Trusts (1)	692,329,123		—		—		—
Total assets at fair value	$	1,242,861,811	$	502,151,041	$	48,381,647	$	—

Plan investments measured at net asset value per share and excluded from the fair value hierarchy are collective funds in the amount of $1,255,503,985 and $692,329,123 at December 31, 2025 and 2024, respectively. These Plan investments can be redeemed daily, however, are subject to the Plan's frequent trading policy which states if a fund is sold or exchanged, it is not permitted to buy or exchange back into the same fund, in the same account, within 30 calendar days. Redemption of the entire investment balance does not require formal notice unless the balance is greater than Vanguard's Large Transaction Policy limit for the given fund. If the redemption amount exceeds the fund's limit, Vanguard must be notified and approve the redemption. At December 31, 2025 and 2024, the Plan had no unfunded commitments related to these investments.

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

- Definition

The entire disclosure for fair value of investment held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)), including, but not limited to, fair value measured at net asset value per share as practical expedient (NAV).

+ References

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-Topic 820
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+ Details

Plan Description (Details) - EBP 001 - USD ($)	12 Months Ended
Plan Description (Details) - EBP 001 - USD ($)	Dec. 31, 2025	Dec. 31, 2024
EBP, Description of Plan [Line Items]
EBP, Requisite Service Period	30 days	90 days
EBP, Employer Contribution, Matching Percentage	100.00%
EBP, Employer Contribution, Participant Compensation Matched, Percentage	1.00%
EBP, Employer Contribution, Matching Percentage, Two	50.00%
EBP, Employer Contribution, Participant Compensation Matched, Percentage, Minimum	1.00%
EBP, Employer Contribution, Participant Compensation Matched, Percentage, Maximum	6.00%
EBP, Employer Contribution Vesting Percentage	100.00%
EBP, Note Receivable from Participant, Account, Minimum Borrowing, Amount	$ 1,000
EBP, Note Receivable from Participant, Account, Maximum Borrowing, Amount	$ 50,000
EBP, Note Receivable from Participant, Account, Maximum Borrowing, to Total Account, Percentage	50.00%
EBP, Note Receivable From Participant, General Loan, Minimum Borrowing Term	1 year
EBP, Note Receivable From Participant, General Loan, Maximum Borrowing Term	5 years
EBP, Quarterly Amount Deducted From Participant Account For Administrative Expenses	$ 8.50

Schedule H, Line 4i - Schedule of Assets (Held At End of Year)

12 Months Ended

Dec. 31, 2025

EBP 001

EBP, Schedule of Asset Held for Investment [Line Items]

Schedule H, Line 4i - Schedule of Assets (Held At End of Year)

Schedule H, Line 4i - Schedule of Assets (Held at End of Year)

Identity of Issuer, Borrower,
Lessor, or Similar Party

Description of Investment
Including Maturity Date,
Rate of Interest, Collateral,
Par, or Maturity Value

Cost

Current Value

Cash:

* Vanguard brokerage option - cash

1,929,740

Units

1,929,740

Stock:

* STERIS plc

STERIS Company Stock Fund - 349,011

Units

86,104,555

Mutual Funds:

* Vanguard FTSE All-World ex-US Index Fund: Institutional Shares

294,130

42,625,342

* Vanguard Federal Money Market Fund

50,141,588

50,141,587

* Vanguard brokerage option

Various registered investment companies

24,077,154

116,844,083

Collective Trusts:

* Vanguard Institutional Extended Market Index Trust D

758,165

97,484,815

* Vanguard Institutional 500 Index Trust D

1,872,917

261,328,075

* Vanguard Institutional Total Bond Market Index Trust D

396,797

43,711,127

* Vanguard Target Retirement 2020 Trust I

265,724

22,549,351

* Vanguard Target Retirement 2025 Trust I

789,835

72,672,706

* Vanguard Target Retirement 2030 Trust I

1,187,880

116,269,718

* Vanguard Target Retirement 2035 Trust I

1,305,796

137,265,262

* Vanguard Target Retirement 2040 Trust I

1,075,162

122,364,228

* Vanguard Target Retirement 2045 Trust I

1,025,956

122,878,799

* Vanguard Target Retirement 2050 Trust I

900,828

111,486,435

* Vanguard Target Retirement 2055 Trust I

510,101

76,984,410

* Vanguard Target Retirement 2060 Trust I

521,945

41,400,641

* Vanguard Target Retirement 2065 Trust I

307,420

14,995,932

* Vanguard Target Retirement 2070 Trust I

81,490

2,423,512

* Vanguard Target Retirement Income Trust I

154,453

11,688,974

1,255,503,985

Other:

* Participant Loans

Bearing interest between 4.25% and 9.50% and maturing through 2035

18,634,062

1,479,016,425


* Indicated party-in-interest to the Plan.
** Participant-directed investment, cost not required

Schedule H, Line 4i - Schedule of Assets (Held At End of Year) (Details) - EBP 001 - USD ($)	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
EBP, Schedule of Asset Held for Investment [Line Items]
Entity tax identification number	34-1482024
Plan number	001
Notes receivable from participants	$ 1,479,016,425	$ 17,176,868
Investments At Fair Value
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value	116,844,083
Common Collective Trust, Fair Value
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value	$ 1,255,503,985
Investment, Identifier [Axis]: Cash \| * Vanguard brokerage option - cash
EBP, Schedule of Asset Held for Investment [Line Items]
Number of units (in shares)	1,929,740
Current Value	$ 1,929,740
Investment, Identifier [Axis]: Collective Trusts \| * Vanguard Institutional 500 Index Trust D
EBP, Schedule of Asset Held for Investment [Line Items]
Number of units (in shares)	1,872,917
Current Value	$ 261,328,075
Investment, Identifier [Axis]: Collective Trusts \| * Vanguard Institutional Extended Market Index Trust D
EBP, Schedule of Asset Held for Investment [Line Items]
Number of units (in shares)	758,165
Current Value	$ 97,484,815
Investment, Identifier [Axis]: Collective Trusts \| * Vanguard Institutional Total Bond Market Index Trust D
EBP, Schedule of Asset Held for Investment [Line Items]
Number of units (in shares)	396,797
Current Value	$ 43,711,127
Investment, Identifier [Axis]: Collective Trusts \| * Vanguard Target Retirement 2065 Trust I
EBP, Schedule of Asset Held for Investment [Line Items]
Number of units (in shares)	307,420
Current Value	$ 14,995,932
Investment, Identifier [Axis]: Collective Trusts \| * Vanguard Target Retirement 2070 Trust I
EBP, Schedule of Asset Held for Investment [Line Items]
Number of units (in shares)	81,490
Current Value	$ 2,423,512
Investment, Identifier [Axis]: Collective Trusts \| * Vanguard Target Retirement 2020 Trust I
EBP, Schedule of Asset Held for Investment [Line Items]
Number of units (in shares)	265,724
Current Value	$ 22,549,351
Investment, Identifier [Axis]: Collective Trusts \| * Vanguard Target Retirement 2025 Trust I
EBP, Schedule of Asset Held for Investment [Line Items]
Number of units (in shares)	789,835
Current Value	$ 72,672,706
Investment, Identifier [Axis]: Collective Trusts \| * Vanguard Target Retirement 2030 Trust I
EBP, Schedule of Asset Held for Investment [Line Items]
Number of units (in shares)	1,187,880
Current Value	$ 116,269,718
Investment, Identifier [Axis]: Collective Trusts \| * Vanguard Target Retirement 2035 Trust I
EBP, Schedule of Asset Held for Investment [Line Items]
Number of units (in shares)	1,305,796
Current Value	$ 137,265,262
Investment, Identifier [Axis]: Collective Trusts \| * Vanguard Target Retirement 2040 Trust I
EBP, Schedule of Asset Held for Investment [Line Items]
Number of units (in shares)	1,075,162
Current Value	$ 122,364,228
Investment, Identifier [Axis]: Collective Trusts \| * Vanguard Target Retirement 2045 Trust I
EBP, Schedule of Asset Held for Investment [Line Items]
Number of units (in shares)	1,025,956
Current Value	$ 122,878,799
Investment, Identifier [Axis]: Collective Trusts \| * Vanguard Target Retirement 2050 Trust I
EBP, Schedule of Asset Held for Investment [Line Items]
Number of units (in shares)	900,828
Current Value	$ 111,486,435
Investment, Identifier [Axis]: Collective Trusts \| * Vanguard Target Retirement 2055 Trust I
EBP, Schedule of Asset Held for Investment [Line Items]
Number of units (in shares)	510,101
Current Value	$ 76,984,410
Investment, Identifier [Axis]: Collective Trusts \| * Vanguard Target Retirement 2060 Trust I
EBP, Schedule of Asset Held for Investment [Line Items]
Number of units (in shares)	521,945
Current Value	$ 41,400,641
Investment, Identifier [Axis]: Collective Trusts \| * Vanguard Target Retirement Income Trust I
EBP, Schedule of Asset Held for Investment [Line Items]
Number of units (in shares)	154,453
Current Value	$ 11,688,974
Investment, Identifier [Axis]: Mutual Funds \| * Vanguard FTSE All-World ex-US Index Fund: Institutional Shares
EBP, Schedule of Asset Held for Investment [Line Items]
Number of units (in shares)	294,130
Current Value	$ 42,625,342
Investment, Identifier [Axis]: Mutual Funds \| * Vanguard Federal Money Market Fund
EBP, Schedule of Asset Held for Investment [Line Items]
Number of units (in shares)	50,141,588
Current Value	$ 50,141,587
Investment, Identifier [Axis]: Mutual Funds \| * Vanguard brokerage option
EBP, Schedule of Asset Held for Investment [Line Items]
Current Value	24,077,154
Investment, Identifier [Axis]: Other \| * Participant Loans
EBP, Schedule of Asset Held for Investment [Line Items]
Notes receivable from participants	$ 18,634,062
Investment, Identifier [Axis]: Other \| * Participant Loans \| Minimum
EBP, Schedule of Asset Held for Investment [Line Items]
Interest rate	4.25%
Investment, Identifier [Axis]: Other \| * Participant Loans \| Maximum
EBP, Schedule of Asset Held for Investment [Line Items]
Interest rate	9.50%
Investment, Identifier [Axis]: Stock \| * STERIS plc
EBP, Schedule of Asset Held for Investment [Line Items]
Number of units (in shares)	349,011
Current Value	$ 86,104,555

Fair Value Measurements (Details) - EBP 001 - USD ($)	Dec. 31, 2025	Dec. 31, 2024
EBP, Investment, Fair Value and NAV [Line Items]
Investments, at fair value	$ 1,460,382,363	$ 1,242,861,811
Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member]
EBP, Investment, Fair Value and NAV [Line Items]
Investments, at fair value	204,878,378	550,532,688
Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] \| Cash:
EBP, Investment, Fair Value and NAV [Line Items]
Investments, at fair value	1,929,740	1,436,271
Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] \| Employer, Common Stock
EBP, Investment, Fair Value and NAV [Line Items]
Investments, at fair value	86,104,555	81,552,897
Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] \| Mutual Funds:
EBP, Investment, Fair Value and NAV [Line Items]
Investments, at fair value	116,844,083	467,543,520
Fair Value, Inputs, Level 1 [Member]
EBP, Investment, Fair Value and NAV [Line Items]
Investments, at fair value	153,546,276	502,151,041
Fair Value, Inputs, Level 1 [Member] \| Cash:
EBP, Investment, Fair Value and NAV [Line Items]
Investments, at fair value	1,929,740	1,436,271
Fair Value, Inputs, Level 1 [Member] \| Employer, Common Stock
EBP, Investment, Fair Value and NAV [Line Items]
Investments, at fair value	86,104,555	81,552,897
Fair Value, Inputs, Level 1 [Member] \| Mutual Funds:
EBP, Investment, Fair Value and NAV [Line Items]
Investments, at fair value	65,511,981	419,161,873
Fair Value, Inputs, Level 2 [Member]
EBP, Investment, Fair Value and NAV [Line Items]
Investments, at fair value	51,332,102	48,381,647
Fair Value, Inputs, Level 2 [Member] \| Cash:
EBP, Investment, Fair Value and NAV [Line Items]
Investments, at fair value	0	0
Fair Value, Inputs, Level 2 [Member] \| Employer, Common Stock
EBP, Investment, Fair Value and NAV [Line Items]
Investments, at fair value	0	0
Fair Value, Inputs, Level 2 [Member] \| Mutual Funds:
EBP, Investment, Fair Value and NAV [Line Items]
Investments, at fair value	51,332,102	48,381,647
Fair Value, Inputs, Level 3 [Member]
EBP, Investment, Fair Value and NAV [Line Items]
Investments, at fair value	0	0
Fair Value, Inputs, Level 3 [Member] \| Cash:
EBP, Investment, Fair Value and NAV [Line Items]
Investments, at fair value	0	0
Fair Value, Inputs, Level 3 [Member] \| Employer, Common Stock
EBP, Investment, Fair Value and NAV [Line Items]
Investments, at fair value	0	0
Fair Value, Inputs, Level 3 [Member] \| Mutual Funds:
EBP, Investment, Fair Value and NAV [Line Items]
Investments, at fair value	0	0
Fair Value Measured at Net Asset Value Per Share [Member] \| Common Collective Trust [Member]
EBP, Investment, Fair Value and NAV [Line Items]
Investments, at fair value	$ 1,255,503,985	$ 692,329,123

Statement of Net Asset Available for Benefit (Statement) - EBP 001 - USD ($)	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Assets:
Investments, at fair value	$ 1,460,382,363	$ 1,242,861,811
Notes receivable from participants	1,479,016,425	17,176,868
Net assets available for benefits	$ 1,479,016,425	$ 1,260,038,679	$ 1,127,420,258

- Definition

Fair value of investment, excluding plan interest in master trust, held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Includes, but is not limited to, derivative, investment measured at net asset value per share as practical expedient, and insurance contract not meeting fully-benefit responsive investment criteria.

+ References

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+ Details

- Definition

Amount of asset less liability available to pay benefit of participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)), including, but not limited to, aggregation of participants' individual account balances.

+ References

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+ Details

Plan Description	12 Months Ended
Plan Description	Dec. 31, 2025
EBP 001
EBP, Description of Plan [Line Items]
EBP, Description of Plan [Text Block]	Plan Description The following brief description of the STERIS Corporation 401(k) Plan (the “Plan”) provides only general information. A complete description of the Plan provisions, including those relating to participation, vesting and benefits, is contained in the Plan document. Participants should refer to the Plan document for complete information regarding the Plan’s provisions. General The Plan is a defined contribution plan administered by STERIS Corporation (the “Company,” or “Plan Administrator”), an indirect wholly-owned subsidiary of STERIS plc (“STERIS”). Generally, all U.S. employees of the Company and certain participating subsidiaries and other affiliates who have attained the age of 18 and have completed 30 days of employment with the Company or a participating subsidiary or other affiliate are eligible to participate in the Plan on the first day of the payroll period that begins after satisfying these requirements. For employees hired prior to January 1, 2025, the service requirement was age of 18 and 90 days of employment with the company. Rehired employees who were previously participants are eligible for participation immediately upon rehire. The Plan contains an automatic enrollment feature for newly eligible participants and a Qualified Automatic Contribution Arrangement (QACA). The Plan contains provisions providing that an employee of the Company or a subsidiary or other affiliate who is not eligible to participate in the Plan and who is transferred to an employment status that makes him/her eligible to participate, will become a participant as of the date of transfer provided that he/she has satisfied the minimum age and service requirements at that time. The Plan was amended and restated in its entirety effective January 1, 2015, to consolidate all prior amendments into one document and to meet then applicable IRS qualification requirements that plan sponsors restate their plan documents. Subsequent to December 31, 2025, the Plan was amended and restated in its entirety effective January 1, 2026 to consolidate prior amendments and reflect applicable legal changes, including changes under the Setting Every Community Up For Retirement Enhancement Act of 2019 (the SECURE Act) and the Setting Every Community Up For Retirement Enhancement 2.0 Act of 2022 (the SECURE 2.0 Act). Except as otherwise specifically provided in the amended and restated Plan or required by applicable law, benefits accrued and rights determined with respect to periods prior to January 1, 2026 are governed by the Plan documents and amendments in effect for those periods. The Plan is a stock bonus plan. The portion of the Plan fund that holds investments consisting of STERIS plc ordinary shares (the “STERIS Company Stock Fund”) is an employee stock ownership plan within the meaning of Section 4975(e)(7) of the Internal Revenue Code (the “Code”). The Plan provides for a cash payment option with respect to dividends paid on STERIS shares held in the STERIS Company Stock Fund. The Plan also contains a cash or deferred arrangement intended to qualify under Section 401(k) of the Code. The Plan is qualified under Section 401(a) of the Code. The 401(k) Plan Oversight Committee is responsible for the general administration of the Plan. Vanguard Fiduciary Trust Company is the Plan trustee and The Vanguard Group, Inc. is the Plan recordkeeper (collectively “the Trustee”). The Plan is subject to the provisions of the Employee Retirement Income Security Act of 1974 as amended (“ERISA”). Contributions Participants may make contributions to the Plan as “before-tax” deferred compensation contributions or on an “after-tax” basis as Roth 401(k) contributions. The Plan does not permit participants to make non-Roth after-tax contributions. The Plan allows participants to contribute up to 50% of their compensation received during a calendar year, subject to certain limitations. The contributions for each participant are made by payroll deductions and are determined each pay period by multiplying the participant selected deferral percentage rate then in effect by his/her eligible compensation for such period. Participants who are automatically enrolled in the Plan are enrolled at a rate of 3% of eligible contribution, and such rate automatically increases by 1% each year up to a maximum amount of 6% of eligible compensation. The Plan contains a feature that allows participants to modify deferral percentages at any time. The Company makes matching cash contributions to participants' accounts. The matching contributions are a percentage of the contributions made by each participant and are intended to qualify as safe harbor matching contributions. For the year ended December 31, 2025, the plan is operating under employer matching contributions of 100% of a participant's contribution (not in excess of two percent of eligible compensation), and 50% of the participant's contributions (in excess of two percent but not in excess of six percent of eligible compensation). For the year ended December 31, 2024, employer matching contributions were 100% of a participant's contribution (not in excess of one percent of eligible compensation), and 50% of the participant's contributions (in excess of one percent but not in excess of six percent of eligible compensation), subject to certain Plan limitations. The employer matching contributions are made each pay period. The Company has reserved the right to amend the Plan, which includes the right to suspend, modify or terminate employer matching contributions. The Company also may make corrective qualified nonelective contributions to the Plan on behalf of participants. The Plan also allows a participant to contribute into the Plan balances from another qualified benefit plan (known as “rollover contributions”). Participant Accounts A separate account is maintained for each participant in the Plan, reflecting contributions, investments, realized and unrealized investment gains and losses, loans and interest, withdrawals, rollovers and certain fees. The net value of each participant account is established at the close of each business day through the valuation of each fund’s assets. Participants may elect to invest contributions, including employer contributions, in any combination of the investment funds offered by the Plan, including the STERIS Company Stock Fund. If a participant does not make an investment election with respect to 100% of the contributions made on behalf of the participant, those contributions for which no election has been made will be invested in the default investment option (Vanguard Target Retirement Date Funds), until an affirmative election of other investment options is received from the participant. Participants can generally change their investment elections at any time, subject to certain limitations with respect to the STERIS Company Stock Fund. A participant may elect to have a portion or all of the balance of prior contributions together with earnings transferred from the fund in which it is invested to any other fund, subject to any transfer restrictions that the fund may impose. The STERIS Company Stock Fund will not accept transfers from other investment funds or rollover contributions. A self-directed mutual fund brokerage window option also is available to participants. This option enables participants to invest in a wide variety of mutual funds, beyond the core investment funds available to all Plan participants. Participants who elect this option are subject to additional charges; these additional charges are the responsibility of the electing participants. Vesting All participants are immediately vested in their contributions and employer matching contributions plus actual earnings thereon. Forfeitures All contributions to the Plan are 100% vested; however, if for any reason an amount is required to be forfeited pursuant to Article VII of the Plan or to a correction under the Internal Revenue Service's Employee Plans Compliance Resolution System (EPCRS) program for which the Employer and the Plan are eligible, as set forth in Revenue Procedure 2021-30 or any successor thereto, such forfeiture shall be used as soon as practicable to pay Plan expenses or to reduce any Employer Contributions to be made in the Plan Year in which the forfeiture occurs or the next following Plan Year. Plan Withdrawals and Distributions Upon separation from service with the Company due to death, disability, retirement, or termination, a participant may elect to receive a lump-sum distribution equal to his or her vested account balance. To the extent that a participant's separate account is invested in the STERIS Company Stock Fund, a participant may elect to receive payment of benefits in the form of an in-kind distribution of shares held in the STERIS Company Stock Fund. In-service withdrawals are available in certain limited circumstances, as defined by the Plan. Hardship withdrawals are allowed for participants incurring an immediate and heavy financial need, as defined by the Plan. Hardship withdrawals are strictly regulated by Internal Revenue Service (IRS) requirements. Participants Loans Participants currently employed may borrow from their fund accounts a minimum of $1,000 up to a maximum equal to the lesser of $50,000 or 50 percent of their vested account balance. Loan terms generally range from 1-5 years and are secured by the balance in the participant’s account. Loan terms for loans used for the purchase of a participant’s primary residence can be longer than five years. The loans bear interest at a rate established by the Trustee. Principal and interest is paid through payroll deductions. Participants may have only one loan outstanding at any time and participants may take only one loan in a twelve-month period. If any amount that was not paid when due remains unpaid by the end of the calendar quarter following the quarter in which the payment was due the loan will be in default. If a participant terminates employment with the Company, they may continue to make loan payments directly to the Trustee through a pre-authorized check agreement. If the loan is not repaid, it will automatically be treated as a distribution to the participant as soon as practicable following the default. STERIS Company Stock Fund Each participant who has an investment in the STERIS Company Stock Fund holds stock fund units. These units represent a proportionate number of STERIS shares held in the STERIS Company Stock Fund. The Company Stock Fund may hold cash or other short-term securities, although these are expected to be a small percentage of the fund. The Company has implemented a dividend pass-through election for its participants for cash dividends that equal or exceed $25. Each participant is entitled to exercise voting rights attributable to the STERIS shares that his or her stock units represent. At least thirty days prior to the time such rights are to be exercised, each participant is sent, electronically or by regular mail, a copy of the proxy solicitation materials. Participants are requested to instruct the Trustee as to how shares should be voted. If a participant does not provide the Trustee with instructions as to how shares should be voted, then such shares are voted, as provided in the Plan, proportionately in accordance with the instructions received from other participants in the Plan who are voting. Plan Termination The Company, by action of its Board of Directors and without approval of its shareholders, has the right under the Plan to amend, suspend, or terminate the Plan in its entirety subject to the provisions of ERISA. The 401(k) Plan Oversight Committee for the Plan also is authorized to make certain Plan amendments. In the event of Plan termination, participants will remain 100 percent vested in their accounts. Administrative Expenses Costs incident to the purchase and sale of securities, such as brokerage commissions and stock transfer taxes, are paid by the respective funds. All other administrative expenses incurred in the administration of the Plan are charged against the respective funds, unless the Company elects to pay such amounts. A quarterly amount of $8.50 was deducted from each participant account for calendar years 2025 and 2024, to pay administrative fees. The Company has elected to pay audit, legal, and consulting fees only. Expenses that are paid by the Company are excluded from these financial statements.

Transactions with Parties-in-Interest (Details) - EBP 001 - USD ($)	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
EBP, Related Party and Party-in-Interest Transactions [Line Items]
Investment interest and dividend income	$ 7,699,742	$ 13,266,668
Employer, Common Stock
EBP, Related Party and Party-in-Interest Transactions [Line Items]
EBP, Investment Acquired, Excluding Plan Interest in Master Trust, Cost	3,373,115	3,760,678
EBP, Investment Sold, Excluding Plan Interest in Master Trust, Selling Price	16,744,957	15,799,109
Investment interest and dividend income	$ 852,465	$ 907,050

Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2025

EBP 001

EBP, Investment, Fair Value and NAV [Line Items]

EBP, Investment, Fair Value and NAV [Table Text Block]

The following tables set forth by level, within the fair value hierarchy, the Plan’s assets measured at fair value on a recurring basis as of December 31, 2025 and 2024:


	Total		Level 1		Level 2		Level 3
December 31, 2025
Cash	$	1,929,740	$	1,929,740	$	—	$	—
STERIS Company Stock Fund	86,104,555		86,104,555		—		—
Mutual Funds	116,844,083		65,511,981		51,332,102		—
Total assets in fair value hierarchy	$	204,878,378	$	153,546,276	$	51,332,102	$	—
Collective Trusts (1)	1,255,503,985		—		—		—
Total assets at fair value	$	1,460,382,363	$	153,546,276	$	51,332,102	$	—


	Total		Level 1		Level 2		Level 3
December 31, 2024
Cash	$	1,436,271	$	1,436,271	$	—	$	—
STERIS Company Stock Fund	81,552,897		81,552,897		—		—
Mutual Funds	467,543,520		419,161,873		48,381,647		—
Total assets in fair value hierarchy	$	550,532,688	$	502,151,041	$	48,381,647	$	—
Collective Trusts (1)	692,329,123		—		—		—
Total assets at fair value	$	1,242,861,811	$	502,151,041	$	48,381,647	$	—

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

- Definition

Tabular disclosure of fair value of investment held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)), including, but not limited to, fair value measured at net asset value per share as practical expedient (NAV).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-3

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 962
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+ Details

Summary of Accounting Policies (Policies) - EBP 001	12 Months Ended
Summary of Accounting Policies (Policies) - EBP 001	Dec. 31, 2025
EBP, Accounting Policy [Line Items]
EBP, Basis of Accounting [Policy Text Block]	Basis of Accounting The financial statements have been prepared in conformity with accounting principles generally accepted in the United States (“U.S. GAAP”). Plan financial statements have been prepared on the accrual basis of accounting. The following is a summary of the significant accounting policies followed by the Plan in the preparation of its financial statements.
EBP, Investment [Policy Text Block]	Investment Valuation and Income Recognition Investments held by the Plan are stated at fair value. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (an exit price). See Note 5 for further discussion and disclosures related to fair value measurements. Purchases and sales of securities are recorded on a trade-date basis. Interest income is recorded on the accrual basis. Dividends are recorded on the ex-dividend date. Net appreciation (depreciation) includes the Plan's gains and losses on investments bought and sold as well as held during the year.
EBP, Use of Estimate [Policy Text Block]	Use of Estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes and supplemental schedules. Actual results could differ from those estimates.
EBP, Note Receivable from Participant [Policy Text Block]	Notes Receivable from Participants Notes receivable from participants are measured at amortized cost, which represents the unpaid principal balance plus any accrued but unpaid interest. Interest income on notes receivable from participants is recorded when earned. Related fees are recorded as administrative expenses and are recorded when incurred. If a participant ceases to make loan repayments and the plan administrator deems the participant loan to be a distribution, the participant loan balance is reduced and a benefit payment is recorded. No allowance for credit losses has been recorded as of December 31, 2025 and 2024.
EBP, Payment to Participant [Policy Text Block]	Payment of Benefits Benefits are recorded when paid.
EBP, Subsequent Event [Policy Text Block]	Subsequent Events Plan management evaluates subsequent events through the financial statement issuance date.

- Definition

Disclosure of accounting policy for use of estimate in preparation of financial statement of employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References + Details

Employee Benefit Plan, Statement of Change in Net Asset Available for Benefit (Statement) - EBP 001 - USD ($)	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Investment income:
Investment interest and dividend income	$ 7,699,742	$ 13,266,668
Interest on notes receivable from participants	1,430,619	1,243,262
Contributions:
Participant	79,015,449	76,604,132
Employer	35,180,458	29,483,123
Rollovers	6,653,825	19,346,162
Total contributions	120,849,732	125,433,417
Total additions	129,980,093	139,943,347
Deductions:
Benefit payments	121,554,744	131,600,843
Administrative expenses	791,103	731,546
Total deductions	122,345,847	132,332,389
Net unrealized and realized appreciation in the fair value of investments	211,343,500	124,680,837
Net increase in net assets available for benefits prior to transfer	218,977,746	132,291,795
Net transfer of assets from other plan	0	326,626
Net increase in net assets available for benefits	218,977,746	132,618,421
Net assets available for benefits at:
Beginning of year	1,260,038,679	1,127,420,258
End of year	$ 1,479,016,425	$ 1,260,038,679

Summary of Accounting Policies	12 Months Ended
Summary of Accounting Policies	Dec. 31, 2025
EBP 001
EBP, Accounting Policy [Line Items]
EBP, Summary of Accounting Policy [Text Block]	Summary of Accounting Policies Basis of Accounting The financial statements have been prepared in conformity with accounting principles generally accepted in the United States (“U.S. GAAP”). Plan financial statements have been prepared on the accrual basis of accounting. The following is a summary of the significant accounting policies followed by the Plan in the preparation of its financial statements. Investment Valuation and Income Recognition Investments held by the Plan are stated at fair value. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date (an exit price). See Note 5 for further discussion and disclosures related to fair value measurements. Purchases and sales of securities are recorded on a trade-date basis. Interest income is recorded on the accrual basis. Dividends are recorded on the ex-dividend date. Net appreciation (depreciation) includes the Plan's gains and losses on investments bought and sold as well as held during the year. Use of Estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes and supplemental schedules. Actual results could differ from those estimates. Notes Receivable from Participants Notes receivable from participants are measured at amortized cost, which represents the unpaid principal balance plus any accrued but unpaid interest. Interest income on notes receivable from participants is recorded when earned. Related fees are recorded as administrative expenses and are recorded when incurred. If a participant ceases to make loan repayments and the plan administrator deems the participant loan to be a distribution, the participant loan balance is reduced and a benefit payment is recorded. No allowance for credit losses has been recorded as of December 31, 2025 and 2024. Payment of Benefits Benefits are recorded when paid. Subsequent Events Plan management evaluates subsequent events through the financial statement issuance date.

Cover	12 Months Ended
Cover	Dec. 31, 2025
Document Information [Line Items]
Document Type	11-K
Entity Registrant Name	STERIS plc
Amendment Flag	false
Entity Central Index Key	0001757898
EBP 001
Document Information [Line Items]
Document Type	11-K
Entity Registrant Name	STERIS plc
Entity Central Index Key	0001757898
Entity tax identification number	34-1482024

Tax Status	12 Months Ended
Tax Status	Dec. 31, 2025
EBP 001
EBP, Tax Status [Line Items]
EBP, Tax Status [Text Block]	Tax Status The Plan received a determination letter from the Internal Revenue Service dated October 9, 2015, stating that the Plan is qualified under Section 401(a) of the Code. This determination also meant, in effect, that the related trust was determined to be exempt from taxation. The Plan is required to operate in conformity with the Code to maintain its qualified status. The Plan Administrator has indicated that it will take the necessary steps, if any, to bring the Plan's operations into compliance with the Code requirements in the event of any noncompliance. U.S. GAAP requires the Company to evaluate tax positions taken by the Plan and recognize a tax asset or liability if the Plan has taken an uncertain position that more likely than not would not be sustained upon examination by the Internal Revenue Service. The Company has analyzed the tax positions taken by the Plan, and has concluded that as of December 31, 2025, there are no uncertain positions taken or expected to be taken. The Plan is subject to routine audits by the Internal Revenue Service; however, there are currently no tax audits for any tax periods in respect of the Plan in progress.