Mirion Technologies, Inc. Class A (MIR)
MIR moved a median of +0.02% 30 minutes after news, and -0.02% by the close. How MIR actually reacts to news — the realized, point-in-time move the market made, measured across 316 labeled events over the last three years with zero look-ahead.
MIR’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | -0.14% | 38% | 315 |
| 30-min | +0.02% | 50% | 316 |
| 60-min | +0.04% | 51% | 316 |
| to close | -0.02% | 49% | 313 |
| Middle 50% of MIR reactions | -0.86% to +0.61% |
|---|---|
| Median reaction (30-min) | +0.02% |
| Measured reactions | 316 |
Half of all Mirion Technologies, Inc. Class A news events land between -0.86% and +0.61% at 30 minutes.
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
How MIR reacts, by analyst action.
| Event | Events | Median 30-min | % positive | Median to close |
|---|---|---|---|---|
| Coverage initiations | 22 | +0.15% | 59% | +0.09% |
| Rating reiterations | 34 | +0.01% | 50% | +0.05% |
| Price-target raises | 15 | -0.00% | 40% | -0.27% |
| Price-target cuts | 15 | -0.04% | 47% | +0.58% |
Last 3 years, pulled 2026-09-21. Reaction = percent move vs. the price at the news timestamp. Counts and medians only. The same measurement runs across every name in the dataset. 2 further classes were observed with fewer than 10 measured events and are not published. See how MIR ranks against every other measured name →
That’s how MIR usually reacts — get an email when it moves on news →Email me when MIR moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to MIR's baseline. Nothing else.
Recent MIR events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Mirion Announces Earnings Release and Conference Call Date for Third Quarter 2026 | Press release | Business Wire | -0.87% | -2.63% | |
| Form 8-K Mirion Technologies, For: Aug 31 | SEC filing · Form 8-K | SEC EDGAR | +1.17% | +0.71% | |
| Form 10-Q Mirion Technologies, For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | -1.17% | +1.92% | |
| Form 8-K Mirion Technologies, For: Jul 28 | SEC filing · Form 8-K | SEC EDGAR | -3.93% | -15.73% | |
| Mirion Announces Second Quarter 2026 Financial Results | Press release | Business Wire | -3.93% | -15.73% | |
| Mirion Announces Earnings Release and Conference Call Date for Second Quarter 2026 | Press release | Business Wire | +0.31% | -1.21% | |
| Form 8-K Mirion Technologies, For: Jul 02 | SEC filing · Form 8-K | SEC EDGAR | -1.85% | -2.03% | |
| Form SD Mirion Technologies, | SEC filing · Form SD | SEC EDGAR | +0.39% | -1.11% | |
| Form 8-K Mirion Technologies, For: May 13 | SEC filing · Form 8-K | SEC EDGAR | -0.86% | -2.00% | |
| Form 10-Q Mirion Technologies, For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | +0.21% | +5.11% | |
| Form 8-K Mirion Technologies, For: Apr 28 | SEC filing · Form 8-K | SEC EDGAR | -0.71% | +1.91% | |
| Mirion Announces First Quarter 2026 Financial Results | Press release | Business Wire | -0.71% | +1.91% | |
| Mirion Announces Earnings Release and Conference Call Date for First Quarter 2026 | Press release | Business Wire | +0.81% | -2.82% | |
| Form 8-K Mirion Technologies, For: Apr 09 | SEC filing · Form 8-K | SEC EDGAR | +0.14% | +1.52% | |
| Form ARS Mirion Technologies, For: Dec 31 | SEC filing · Form ARS | SEC EDGAR | +0.22% | +6.14% | |
| Form DEF 14A Mirion Technologies, For: May 13 | SEC filing · Form DEF | SEC EDGAR | +0.22% | +6.14% | |
| Form 10-K Mirion Technologies, For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | +0.84% | -0.19% | |
| Mirion to Present at Citi’s 2026 Global Industrial Tech and Mobility Conference | Press release | Business Wire | +0.33% | +5.19% | |
| Mirion Announces Executive Appointments to Accelerate Strategic Growth and Market Focus | Press release | Business Wire | -1.15% | -13.37% | |
| Form 8-K Mirion Technologies, For: Feb 10 | SEC filing · Form 8-K | SEC EDGAR | -1.15% | -13.37% | |
| Mirion Announces Fourth Quarter and Full Year 2025 Financial Results; Provides Full Year 2026 Guidance | Press release | Business Wire | -1.15% | -13.37% | |
| Mirion Announces Earnings Release and Conference Call Date for Fourth Quarter and Full Year 2025 | Press release | Business Wire | -1.02% | -2.56% | |
| Form 8-K Mirion Technologies, For: Dec 08 | SEC filing · Form 8-K | SEC EDGAR | +0.72% | +0.40% | |
| Windjammer Capital Completes Sale of Paragon Energy Solutions | Press release | Business Wire | -1.13% | -3.27% | |
| Form 8-K Mirion Technologies, For: Dec 01 | SEC filing · Form 8-K | SEC EDGAR | -1.13% | -3.27% | |
| Mirion Completes Acquisition of Paragon Energy Solutions | Press release | Business Wire | -1.13% | -3.27% | |
| Form 8-K Mirion Technologies, For: Nov 06 | SEC filing · Form 8-K | SEC EDGAR | +0.00% | -3.42% | |
| Form 10-Q Mirion Technologies, For: Sep 30 | SEC filing · Form 10-Q | SEC EDGAR | -0.90% | -3.23% | |
| Form 8-K Mirion Technologies, For: Oct 28 | SEC filing · Form 8-K | SEC EDGAR | +10.08% | +17.64% | |
| Mirion Announces Third Quarter 2025 Financial Results and Updates Full Year Guidance | Press release | Business Wire | +10.08% | +17.64% | |
| Mirion Announces Earnings Release and Conference Call Date for Third Quarter 2025 | Press release | Business Wire | -0.02% | -2.94% | |
| Form 8-K Mirion Technologies, For: Sep 25 | SEC filing · Form 8-K | SEC EDGAR | +0.48% | +1.32% | |
| Mirion Technologies Announces Pricing of Upsized $325.0 Million Offering of 0.00% Convertible Senior Notes Due 2031 | Press release | Business Wire | -1.85% | +3.71% | |
| Mirion Technologies Announces Pricing of Upsized Public Offering of Class A Common Stock | Press release | Business Wire | -1.85% | +3.71% | |
| Form 8-K Mirion Technologies, For: Sep 24 | SEC filing · Form 8-K | SEC EDGAR | -4.59% | -11.16% | |
| Mirion Technologies Announces Proposed $250.0 Million Offering of Convertible Senior Notes Due 2031 | Press release | Business Wire | -3.29% | +3.78% | |
| Mirion Technologies Announces Proposed Public Offering of Class A Common Stock | Press release | Business Wire | -3.29% | +3.78% | |
| Mirion To Acquire Paragon Energy Solutions, one of the Leading Providers of Highly Engineered Solutions for Large-scale Nuclear Power Plants and Small Modular Reactors (SMRs) in the United States | Press release | Business Wire | -4.59% | -11.16% | |
| Mirion Partners with IAEA to Enhance Radiation Safety on a Global Scale | Press release | Business Wire | -0.46% | -5.69% | |
| Form 10-Q Mirion Technologies, For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | +0.00% | +5.31% | |
| Form 8-K Mirion Technologies, For: Jul 31 | SEC filing · Form 8-K | SEC EDGAR | -6.93% | -0.25% | |
| Mirion Acquires Certrec, a Leader in Regulatory Compliance and Advanced Digital Applications for the Nuclear Industry | Press release | Business Wire | -6.93% | -0.25% | |
| Mirion Announces Second Quarter 2025 Financial Results and Updates Full Year Guidance | Press release | Business Wire | -6.93% | -0.25% | |
| Mirion Announces Earnings Release and Conference Call Date for Second Quarter 2025 | Press release | Business Wire | +0.47% | +1.88% | |
| Mirion Technologies and Westinghouse Partner to Drive Digital Innovation in Nuclear Instrumentation Systems | Press release | Business Wire | +3.07% | +4.62% | |
| Form 8-K Mirion Technologies, For: Jun 05 | SEC filing · Form 8-K | SEC EDGAR | -0.70% | -0.50% | |
| Form SD Mirion Technologies, | SEC filing · Form SD | SEC EDGAR | +0.90% | +1.47% | |
| Form 8-K Mirion Technologies, For: May 29 | SEC filing · Form 8-K | SEC EDGAR | +0.24% | +0.05% | |
| Form 8-K Mirion Technologies, For: May 20 | SEC filing · Form 8-K | SEC EDGAR | -1.23% | +1.73% | |
| Form 8-K Mirion Technologies, For: May 20 | SEC filing · Form 8-K | SEC EDGAR | +3.35% | +6.15% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the MIR section they belong to.
Where else MIR is measured.
MIR earnings → · Analyst actions → · SEC filings →
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Every name we’ve measured, in one place.
How the numbers are made.
How is Mirion Technologies, Inc. Class A's median reaction calculated?
Every labeled MIR news event is measured from its own timestamp: the last trade before the news is the base price, and the move is read at fixed horizons — 30 minutes of trading, then the close. The median across 316 events is what this page reports. Point-in-time, zero look-ahead: no event borrows information from a later one.
What counts as a positive reaction?
Any event whose price move is above zero at the horizon, relative to the last trade before the news timestamp. 50% of MIR's measured events are up at 30 minutes; the rest close the window flat or negative.
How often is this page updated?
The news table refreshes automatically as new events are labeled and priced. The reaction medians are re-pulled in batches from the dataset — the figures here are as of 2026-09-21.
Does MIR's past reaction predict its next one?
No. These are realized facts about past events, not forecasts. They describe a distribution — they say nothing certain about any future move.