Steris (STE) Stock Concentration Calculator

Calculator · free · no signup · STE

Quantify Steris concentration risk. Drawdown impact at 30 / 50 / 70%, with the tax-aware trade-off between selling down and hedging.

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Your inputs

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Position & portfolio

Default. Adjust to test.
35%
Default. Adjust to test.
20%
10%

Tax

67%
Highly concentratedLong-term
If 30% drop
−$150,000
If 50% drop
−$250,000
If 70% drop
−$350,000

Most fee-only advisors target ≤10% in any single name. You're at 67%.

Estimates only. Not financial advice.

Most sensitive to: Expected market return (±10% on this input swings best-plan wealth by ±$190,508).

Cost of fully de-concentrating

All three plans sell to 0% (no hedge).

Tax
Wealth (3y)$956,485
+$33,417 vs.

Tax
Wealth (3y)$994,174
+$71,106 vs.

Tax
Wealth (3y)$1.04M
+$112,490 vs.

Sensitivity. If your expected position return drops below 19.6%/yr, lump-sum (sell everything today) beats every spread plan above.

Have multiple RSU vest lots? The RSU Lot Order Calculator picks which lots to sell first, and on which dates, to divest at the lowest computed tax.

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Toggle below — chart updates live. Sell buttons show the slice.
Sell over 1 yearSell over 2 yearsSell over 3 yearsCustom
$712,500$815,995$919,489$1,022,984$1,126,478Yr 0Yr 1Yr 2Yr 3
Year 1
Year 2
Year 3
Tax$200,753
Hedge cost$37,676
Wealth at Y3$1,046,371
Vs. best fixed plan+$10,813

Tech / Software single names hit a 50%+ peak-to-trough drawdown in roughly 1 of every 5 rolling 3-year windows over 2014–2024. Even mega-caps aren’t exempt.

Tax brackets: 2026 · Estimates only — not financial advice.

Estate note. Heirs receive a stepped-up basis at death (§1014), eliminating built-in gain on inherited shares. Older holders who plan to bequeath rather than sell may rationally never de-concentrate.

You sized one position's risk. The beta integrates hedging, sell-down, and tax timing into one optimized plan.

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Related calculators: Protect Your Stock Calculator · RSU Lot Order Calculator · Equity Funding Plan Calculator

About Steris

Steris (STE) is a public Medical Device company, incorporated in Ireland and headquartered in Dublin, Ireland.

Last close: $208.54 per share (as of 2026-10-03).

Equity grants at Steris typically include restricted stock units (RSUs).

Steris plc is an American-Irish-based medical equipment company specializing in sterilization and surgical products for the US healthcare system. Steris is operationally headquartered in Mentor, Ohio, and has been legally registered in Dublin, Ireland, for tax purposes since 2018. Previously the company was registered in the United Kingdom from 2014 to 2018.

Source: Wikipedia (CC BY-SA 4.0)

The company sells the sterilization and infection-prevention systems hospitals depend on, together with the services and consumables that keep them running, and it operates contract sterilization facilities for medical-device manufacturers. Regulatory requirements make sterilization non-discretionary, which insulates demand from hospital budget pressure better than most equipment categories. Outsourced sterilization is constrained by facility permitting, particularly around ethylene oxide emissions. Service contracts on installed equipment provide the recurring layer. The company is incorporated in Ireland, with operations run from Mentor, Ohio.

Sources: sec.gov · en.wikipedia.org

Equity comp at Steris

  • STERIS uses double-trigger change in control (CIC) vesting: unvested options and restricted awards do not accelerate on a CIC alone if the acquirer provides a qualifying replacement award; acceleration requires a qualifying termination (e.g. without cause, or good reason) within a defined window after the CIC. Separately, retirement-eligible grantees (age 55 with 5+ years of service, or 25+ years of service at grant) get more favorable installment vesting (25% per year over 4 years, continuing after retirement) instead of the standard 4-year cliff. The plan was assumed and amended in STERIS’s 2018 corporate redomiciliation to Ireland with no indication this changed vesting mechanics.
  • Early exercise is not allowed: you have to wait for shares to vest before you can buy them.
  • RSUs use double-trigger vesting. Two things must both happen before the shares are yours: (1) the normal time-based vesting completes, and (2) the company has a liquidity event (an IPO or an acquisition). Until both happen, you do not yet own the shares and you do not owe tax on them.
  • Vesting schedule: Standard employee restricted stock/RSU grants under the 2006 Long-Term Equity Incentive Plan cliff-vest 100% on the 4th anniversary of grant (not a graded/ratable 4-year schedule). Stock options generally also vest over a 4-year period..

Sources: sec.gov · sec.gov · contracts.justia.com · sec.gov

Researched 2026-08-26.

OptionsAhoy is an independent tool and is not affiliated with, endorsed by, or sponsored by Steris.

If a meaningful share of your net worth sits in STE, concentration risk is the question. This calculator quantifies drawdown impact at 30 / 50 / 70%, and the trade-off between selling down (tax cost now) versus hedging (option premium drag), auto-filled with STE's option-implied volatility.

Example: 5,000 STE shares at $208.54 is a $1,042,700 position. A 30% drawdown costs $312,810; a 50% drawdown costs $521,350; a 70% drawdown costs $729,890. The calculator quantifies the trade-off between selling down (immediate capital-gains tax) and hedging (option premium drag) using STE's option-implied volatility and your cost basis.

All Steris tools → · Use the generic Stock Concentration Calculator for any company. Diversifying multiple RSU lots? See the lot-by-lot sell order →

Steris equity questions

How much STE stock is too much?
There is no single threshold, but the larger the share of your net worth in one stock, the more a single bad year can set back your plans. The calculator above quantifies the drawdown impact at 30, 50, and 70 percent for your STE position and weighs selling down (which triggers capital-gains tax now) against hedging (which costs option premium).
Does Steris grant ISOs, NSOs, or RSUs?
Equity compensation at Steris typically takes the form of restricted stock units (RSUs). Restricted stock units are taxed as ordinary income when they vest.
Does Steris allow early exercise of stock options?
No. Steris requires options to vest before you can exercise them, so the holding-period clock for long-term capital-gains treatment starts as each tranche vests and you exercise it.
Do Steris RSUs use double-trigger vesting?
Yes. Steris restricted stock units (RSUs) vest only when two things both happen: the time-based schedule completes, and the company has a liquidity event such as an initial public offering (IPO) or an acquisition. Until both occur you do not own the shares and owe no tax on them.
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