Mirion Technologies Inc (MIR) insider trading
Recent insider transactions reported to the SEC on Form 4 — directors and officers buying or selling their own company’s stock. Sourced directly from public SEC filings, latest filed Sep 30, 2026.
Get alerted when insiders buy the stocks you own
Add your holdings — no brokerage login — and Insider Radar sends a Telegram alert when an open-market Form 4 buy of $100,000 or more is filed on a stock you hold or watch.
Free for everyone right now · no card · nothing to buy
- Filings shown
- 10
- Open-market buys
- 1
- Open-market sells
- 0
- Buys, 10b5-1 box not checked
- 1 of 1
Counts cover the 10 most recent Form 4 filings Tradune holds for MIR (filed May 14 – Sep 30, 2026); the score below covers only the trailing 90 days (1 buy, 0 sells). No completed check of MIR's Form 4 list on SEC EDGAR is on record yet; the latest MIR filing Tradune holds was filed Sep 30, 2026. This is not guaranteed to be the complete record — see MIR's full Form 4 filing history on SEC EDGAR.
Open-market activity, last 90 days
Purchases (Form 4 code P) and sales (code S) on the 3 filings Tradune holds for MIR filed Sep 2 – Sep 30, 2026. Grants, exercises, tax withholding and the other Form 4 transaction codes are left out.
| Insider | Buys | Sells | Shares bought | Shares sold | Value |
|---|---|---|---|---|---|
| Brian SchopferChief Financial Officer | 1 | 0 | 20,000 | — | +$312,000 |
Value = shares × the price reported on each Form 4 (+ purchases, − sales); every open-market line in this window disclosed a price.
Summarises ~90 days of public SEC Form 4 activity — more distinct buyers, officer involvement and net buying score higher. A description of filing activity, not a rating or buy signal. How this score is computed →
How to read this: an open-market purchase (Form 4 code P) is a buy at the market price with the insider’s own money, as opposed to a grant, award or option exercise; an open-market sale is code S. When two or more distinct insiders report open-market purchases in the same 90-day window, this site labels that a cluster — a definition, not a forecast; see insider cluster buying. “Held after” is Form 4 Table I column 5; “Change” = shares ÷ holdings before the trade (held after − shares for an acquisition, held after + shares for a disposition).
Insider Buying at MIR
Insiders reported 1 open-market purchase of MIR between May 14, 2026 and Sep 30, 2026, across 1 distinct buyer. The most recent purchase was reported by Brian Schopfer (Chief Financial Officer) on Sep 2, 2026. Grants, option exercises, and tax-withholding transactions are excluded from these counts.
Recent Form 4 filings
Source: SEC EDGAR Form 4 · transaction codes explained
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award | 1,333 | $14.34 | 73,858 | +1.8% | Sep 30, 2026 |
† change in this filer’s own reported holding line (Form 4 Table I, col. 5), not of total company ownership; small prior holdings produce large percentages, so under 100 shares the prior holding is shown instead.
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award | 1,333 | $14.34 | 82,842 | +1.6% | Sep 30, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market purchase 10b5-1 box not checked | 20,000 | $15.60 | 933,290 | +2.2% | Sep 2, 2026 |
“10b5-1 box checked” = the filer checked the Form 4 box stating that a transaction on the filing was made under a plan intended to satisfy Rule 10b5-1(c); “10b5-1 box not checked” = the box was left blank, which does not prove that no plan exists. The box applies to Form 4s filed from April 1, 2023; older filings, and boxes we could not read, carry no tag. What the 10b5-1 box means.
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award | 1,095 | $17.46 | 72,525 | +1.5% | Jun 30, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award | 7,383 | — | 71,430 | +12% | May 13, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award | 7,383 | — | 77,258 | +11% | May 13, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award | 7,383 | — | 60,801 | +14% | May 13, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award | 7,383 | — | 87,448 | +9.2% | May 13, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award | 7,383 | — | 80,119 | +10% | May 13, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award | 7,383 | — | 81,509 | +10.0% | May 13, 2026 |
Insider filings reported around the same time
Other companies whose most recent Form 4 was filed closest to MIR's (Sep 30, 2026).
Frequently asked about MIR insider activity
How many insiders bought MIR stock in these Form 4 filings?
1 distinct insider at Mirion Technologies Inc reported 1 open-market purchase (Form 4 code P) of MIR shares between May 14, 2026 and Sep 30, 2026, the most recent filed by Brian Schopfer (Chief Financial Officer) on Sep 2, 2026. Grants, option exercises, and tax-withholding transactions are excluded from these counts.
Who filed the most recent Form 4 for MIR?
The most recent Form 4 on this page was filed by Jody Markopoulos (Director) on Sep 30, 2026, reporting 1 transaction. The original document is linked from the filing list above on SEC EDGAR. Amended filings (Form 4/A) may later revise reported figures.
What was the largest open-market MIR insider purchase shown?
The largest open-market purchase among the filings shown was 20,000 MIR shares at $15.60 (about $312,000) by Brian Schopfer (Chief Financial Officer) on Sep 2, 2026. Value is shares × the price reported on the Form 4; its Rule 10b5-1 box is not checked.
Do the recent MIR insider purchases have the Form 4 10b5-1 box checked?
No. The one MIR open-market purchase shown was reported with the Rule 10b5-1 box not checked. A blank box records what the filer disclosed; it does not prove that no plan exists. Latest: Brian Schopfer (Chief Financial Officer) on Sep 2, 2026, 20,000 shares.
New to Form 4s? The transaction codes, the 90-day window and the 0–100 score are defined on the insider-activity score methodology page.
Get insider alerts for MIR — and your whole portfolio
Tradune watches SEC Form 4 filings and flags insider-cluster buying across everything you hold, routed to you automatically. Free for everyone right now · no card · nothing to buy
Track MIR insider filings free →This score summarizes SEC Form 4 filing activity over the trailing 90 days. It is descriptive, not predictive — not a rating, recommendation, or investment advice. Data: SEC EDGAR (public domain), as filed; amendments may revise figures. Tradune is not a registered investment adviser.
Data as filed; amended filings (Form 4/A) may revise figures. Sales may occur under prearranged Rule 10b5-1 trading plans.