Mirion Technologies Inc
MIRAbove valueExpectations · demandingHeld by 3 superinvestors.
SEC 10-K · fundamentals
Business quality
as of 2025-12-31Valuation basis: trailing twelve months to 2026-06-30 — latest 10-K plus unaudited 10-Q filings.
- Revenue growth
- +7.5%
- Net margin
- 3.1%
- ROE
- 1.5%
- FCF margin
- 11.6%
Valuation · value band
Above fair value
Zero-growth floor
$3
Central IV
$2
Optimistic top
$3
Mirion Technologies Inc (MIR): A conservative value band $3 / sh (zero-growth floor to growth-capped optimistic top); central read about $2. Today’s price sits above that band (price $15 as of 2026-08-25).
The middle figure is the main read. The right end is the optimistic case under the same conservative caps — not an absolute ceiling.
Revenue growth 5% (lower of historical trend and fundamental cap, capped by moat) · moat 0 yr · discount 10.6% · Zero-growth downside $3
Price as of 2026-08-25 · yahoo · DGS10 4.6% @ 2026-08-25.
Method & numbers
Buybacks over the years shown roughly only offset stock-based-compensation dilution — read them as maintaining the share count, not a net return of capital.
Model cautions
- Owner-earnings yield diverges sharply from the 10-year Treasury (over 300 bps).
A conservative intrinsic-value band (zero-growth floor to growth-capped DCF) plus a tangible asset floor — not investment advice, not a buy/sell signal, and not a price target.
Owner-earnings DCF $1.64 – $3.07 · Greenwald zero-growth $2.55 · zero-growth base $2.55 · reproduction $2.55
Moat Below asset base · terminal value 49% of present value · owner-earnings yield 1% vs 10Y 4.6%.
Graham earnings-power value (normalized NOPAT)$1.45 – $1.80 / sh
Normalized NOPAT = average operating margin over the years shown × latest-year revenue × (1 − normalized tax); then + D&A − maintenance capex (write A). Unlevered (pre-interest, attributable to all capital). Capitalized at the 9–11% rate band (read as a WACC proxy). Enterprise → equity bridge applied: + cash − total debt.
Years: TTM 2026-06-30, 2024, 2023, 2022
v1 simplifications: Maintenance capex (degraded) deducted in full cash (write A): EPV = (NOPAT + D&A − maintenance capex) / WACC; no tax shield on the capex term. Maintenance-capex methods diverge by 895% (> 50%); estimate is degraded. Share-based compensation is left as a real expense (not added back).
Buffett owner-earnings value$1.57 – $1.92 / sh
Owner earnings = average net income + average D&A − maintenance capex (zero-growth floor; no ΔNWC). Levered (starts from net income, already after interest — an equity-holder stream). Capitalized at the 9–11% rate band (read as a cost-of-equity proxy). No enterprise→equity bridge: the capitalized result is already equity value (subtracting debt would double-count interest).
Years: TTM 2026-06-30, 2024, 2023, 2022
v1 simplifications: Owner earnings = net income + D&A − maintenance capex (degraded); the working-capital change is excluded (maintenance ΔNWC ≈ 0; growth ΔNWC is carried in growth value, not double-counted). Maintenance-capex methods diverge by 895% (> 50%); estimate is degraded. One-time items are not separately normalized (multi-year averaging smooths them partially). Share-based compensation is left as a real expense (not added back); see the SBC/OE disclosure. Capitalized at the 9–11% band as a cost-of-equity proxy; no leverage premium applied (net cash or debt within the no-charge range).
Reproduction value = tangible net assets $-581.40M + capitalized R&D $79.64M（FY 2026, 2024, 2023, 2022） = $2.55 / sh. Reproduction value = intangible-inclusive net reproduction (tangible net assets + acquired-intangible reset proxy + capitalized R&D), ÷ diluted shares; tangible net assets alone are negative for this asset-light franchise.
Moat reading: Franchise test compares earnings power (EPV) against reproduction value (tangible net assets + capitalized R&D). EPV well above reproduction value signals a moat; near it, a commodity; below it, value destruction. A directional reading, not a verdict.
Growth value gated to zero — no moat or ROIIC ≤ WACC, so no growth value is credited.
Window TTM 2026-06-30, FY 2024, 2023, 2022 · discount band 9%–11% · normalized tax 5% (Average effective tax rate over 4 year(s), capped at the statutory 21%.) · diluted shares.
Owner-earnings DCF: growth g₁ 5% · OE FY TTM 2026-06-30, 2024, 2023, 2022 · Discount band: 9.14%–12.00% (DGS10 +4.5% to a 12% strict end, as of 2026-08-25). No enterprise→equity bridge: owner earnings already flow to shareholders (post-interest), so no net cash is added and no debt subtracted — matching the engine owner-earnings lamp.
Valuation basis: trailing twelve months to 2026-06-30 — latest 10-K plus unaudited 10-Q filings.
What the price is betting
Today's price pencils in about over 30.0% (outside the usual range) a year in owner-earnings for the next few years. Revenue actually grew 8.7% a year.
The market wants it well ahead of its own track record.
SEC 13F · holders
Superinvestors Holding This Security
3 holders · $250.8M combined · this quarter +0 opened / -1 exited
- Value$150.3MWeight (prev→now)5.1% → 4.2% ▼
- Value$94.0MWeight (prev→now)0.6% → 0.8% ▲
- Value$6.4MWeight (prev→now)0.0% → 0.0% ▼
SEC 13F · notes
Written summary
Written summary
Mirion Technologies Inc (MIR) is held by 3 of the superinvestors tracked on Compounder, with a combined $250.8M in reported 13F value. The largest position belongs to Leon Cooperman, where it makes up 4.2% of the portfolio.
Other notable holders by value include Lee Ainslie (0.8% of its book) and Ray Dalio (0.0% of its book).
Over the latest quarter, 0 of the tracked filers opened a new position in MIR, 2 added to existing ones, 0 trimmed, and 1 sold out entirely.
Holder counts and values reflect the most recent SEC Form 13F filings, through the quarter ended 2026-06-30. Source: SEC EDGAR. A 13F shows only long US-listed positions and can lag the real portfolio by up to 45 days, so this is disclosed long ownership, not a complete picture.
SEC 13F · co-ownership
Also held by these investors
Investors holding Mirion Technologies Inc (MIR) also commonly hold →
- Amazon.Com IncAMZN3 holders
- Capital One Financial CorpCOF3 holders
- Nvidia CorpNVDA2 holders
- Advanced Micro DevicesAMD2 holders
- Vertiv Holdings Co-AVRT2 holders
- Microsoft CorpMSFT2 holders
MIR's price is not below its conservative value band. See current strike-zone stocks
Sources· SEC EDGAR 13F as of 2026-06-30 · filed 2026-08-14
Educational data only — not investment advice. 13F positions are self-reported and can lag up to 45 days.
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