Mirion Technologies reported Q1 2026 revenue of $257.6M, up 27.5% year over year on heavy Paragon, Certrec, and FX contribution, with Adjusted EBITDA of $54.3M (+16.3%) at a 21.1% margin and orders excluding the recent acquisitions of +19% to $241M. Management reaffirmed FY2026 organic growth (5-7%), Adjusted EBITDA ($285-300M), Adjusted EBITDA margin (25-26%), and Adjusted Free Cash Flow ($155-175M); only Adjusted EPS was revised down to $0.48-$0.55 (from $0.50-$0.57) to absorb a special one-time CEO retention grant disclosed Apr 13. The print is a clean confirmation of the cadence management telegraphed on the Q4 call: Q1 is the lightest quarter, margins compressed as Paragon dilution and a tough sensing comp absorbed roughly 200 bps, and the rest of the year requires a real ramp. Stock $18.68, down ~7% from the $20.14 prior thesis date. The committee holds price-at-value with MEDIUM confidence.
The Numbers
Guidance: Reaffirmed Across Five of Six Lines
The press release explicitly reaffirmed FY2026 guidance on every operating metric and revised only the Adjusted EPS line for a governance item:
- Total revenue growth: 22.0%-24.0% (REAFFIRMED — includes FX and acquisition tailwinds)
- Organic growth: 5.0%-7.0% (REAFFIRMED — same range as the Q4 call)
- Adjusted EBITDA: $285M-$300M (REAFFIRMED)
- Adjusted EBITDA margin: 25.0%-26.0% (REAFFIRMED — well below the 30% margin probe in the ensemble)
- Adjusted Free Cash Flow: $155M-$175M (REAFFIRMED; 54-58% conversion)
- Adjusted EPS: $0.48-$0.55 (REVISED DOWN ~$0.02 from $0.50-$0.57 to absorb the Apr 13 special one-time CEO retention grant of performance-vesting stock options — governance, not operating)
Reaffirming five of six lines after one quarter is a credibility signal. The single revision is fully explained by an Apr 13 8-K disclosing a special grant to founder/CEO Tom Logan; the performance-vesting structure mitigates the alignment concern but the timing — a non-standard grant on top of regular compensation, mid-cycle — adds weight to the GOVERNANCE_ALIGNMENT MIXED watch list rather than changing the assessment outright.
Forecast Markets: Zero Resolved on the 8-K Alone
None of the seven active MIR markets resolves on the press release. The 8-K does not publish segment-level organic growth, large-pipeline conversion, RTQA-specific commentary, or H1/H2 margin phasing — those arrive on the Apr 29 call and in the 10-Q. The probability state heading into the call:
| Market | Probability | Q1 Read-Through |
|---|---|---|
| Q1 organic growth at/above guide (May 15) | 0.62 | Pending Apr 29 segment data; press release commentary on nuclear orders momentum is supportive |
| FY2026 organic growth above 5% | 0.48 | Reaffirmation of 5-7% range is supportive but not a resolution event |
| FY2026 Adj. EBITDA margin above 30% | 0.52 | Q1 21.1% + reaffirmed 25-26% guide leaves no realistic path; directionally negative for next refresh |
| Large pipeline conversion above $200M | 0.40 | Q1 ex-acquisition orders +19% supportive at the aggregate level; not project-level granular yet |
| Paragon margin dilution narrows by H2 | 0.55 | Q1 200 bps margin compression consistent with management framing of Q1 as the heaviest dilution quarter |
| RTQA returns to positive organic | 0.50 | Segment data not in 8-K; awaiting Apr 29 call |
| Insider selling decelerates through H1 | 0.45 | Resolves on Form 4 filings through Jul 15; Apr 13 CEO retention grant is governance-relevant but not a selling event |
The clearest directional shift is the FY2026 30%+ margin market: Q1 21.1% combined with the reaffirmed 25-26% full-year guide leaves no realistic path to 30%, and the 0.52 ensemble probability is now skewed-high relative to fundamentals. The committee will let the next prediction refresh requantify rather than override the current ensemble on a single data point. The most immediate market — Q1 organic growth at or above guide, deadline May 15 — resolves once the segment data from the call or the 10-Q is in hand.
What Changed at the Signal Level
Seven lenses reviewed; six unchanged, one with mild watch-list additions. No signal-level reclassifications:
- Insider Investigator — GOVERNANCE_ALIGNMENT: MIXED, with the Apr 13 special CEO retention grant added to the monitoring list. The performance-vesting structure mitigates the magnitude, but the grant warrants attention at the next proxy.
- Gravy Gauge — REVENUE_DURABILITY: CONDITIONAL, lean positive. Order book +19% ex-acquisitions reinforces the nuclear-power durability case; segment Q1 organic still required to validate the 5-7% FY guide.
- Myth Meter — NARRATIVE_REALITY_GAP: DIVERGENT. Headline +27.5% top-line overstates underlying organic momentum until segment disclosure closes the gap.
- Stress Scanner — FUNDING_FRAGILITY: STRETCHED but stable. Cash $397.9M with $14.4M QoQ drawdown reflecting $16M treasury repurchase plus seasonal working capital; no debt actions, no covenant pressure.
- Fugazi Filter — ACCOUNTING_INTEGRITY: QUESTIONABLE. SBC inclusion in Adjusted EPS now consistent across periods; no new accounting concerns surfaced in the 8-K.
- Moat Mapper / Consolidation Calibrator: UNCHANGED. No moat-relevant disclosures and no new M&A; Paragon completing its first full quarter is on plan.
See the full six-lens MIR analysis
The March 2026 MIR deep-dive across Fugazi Filter, Gravy Gauge, Consolidation Calibrator, Moat Mapper, Stress Scanner, and Myth Meter, plus the seven forecast markets tracking the nuclear renaissance thesis.
Public Sources Used
- MIR Q1 2026 Form 8-K (Item 2.02, Exhibit 99.1 press release; SEC EDGAR, filed 2026-04-28): SEC EDGAR
- MIR Form 8-K Item 5.02 (special one-time CEO retention grant; filed 2026-04-13)
- MIR FY2025 10-K (baseline analysis reference)
- MIR Q4 2025 earnings call transcript (Feb 11, 2026; baseline reference)
- MIR Q3 2025 / Q2 2025 / Q1 2025 earnings call transcripts