Mirion Technologies MIR Insider Ownership

NYSE MIR
$14.31 -0.04 (-0.24%)
As of: Sep 29, 2026 · 3:59 PM EDT

Insider Holdings by Owner

42.00Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026
Insider Ownership
19.11%
▲+0.0082% pp QoQ
Shares Held by Insiders
46.73Mn
filed for Sep 2026
▲+0.04% QoQ
Shares Outstanding
244.57Mn
244,565,000 shares
Direct Holdings
24.46Mn
Indirect: 22.27Mn
Net Shares Traded (QoQ)
+20.00K
net buying in Sep 2026
Insiders Holding Shares
17
with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding
Latest —
Average ownership —
Peak ownership —

Shares Purchased/Sold by Insiders

Bought Sold
Latest quarter —
Net over range —
Buying quarters —

Insider Ownership Summary

Quarter ending 30 Sep, 2026

MIR's three largest insider shareholders as of September 29, 2026 are Sponsor Ii Llc Gs (TenPercentOwner, 17.79Mn shares), General Partners (Ix) Ltd Charterhouse (Other, 14.96Mn shares), Lawrence D Kingsley (Director, 3.51Mn shares).

Form 4 Holdings

Insiders Holding MIR

Insiders 17
Shares held 42.00Mn
Of outstanding 17.17%
# Insider Position Direct Indirect Total Share of Insiders Last Filed
1 Sponsor Ii Llc Gs TenPercentOwner 17,793,000 0 17,793,000 42.4% 06 Jun, 2024
2 General Partners (Ix) Ltd Charterhouse Other 0 14,960,702 14,960,702 35.6% 08 Mar, 2023
3 Thomas D Logan Chief Executive Officer 2,201,313 2,551,371 4,752,684 11.3% 07 May, 2026
4 Brian Schopfer Chief Financial Officer 2,199,971 0 2,199,971 5.2% 02 Sep, 2026
5 Michael Freed Chief Operating Officer 935,818 0 935,818 2.2% 22 Oct, 2021
6 Loic Eloy Nuclear Safety President 316,424 0 316,424 0.8% 03 Mar, 2026
7 Michael J Rossi Medical Group President 196,618 0 196,618 0.5% 03 Nov, 2023
8 Steven W. Etzel Director 116,838 0 116,838 0.3% 14 May, 2026
9 Emmanuelle Lee Chief Legal Officer 82,431 32,748 115,179 0.3% 02 Apr, 2026
10 Jody Markopoulos Director 109,824 0 109,824 0.3% 14 May, 2026
11 John W Kuo Director 109,509 0 109,509 0.3% 14 May, 2026
12 Kenneth Bockhorst Director 105,573 0 105,573 0.3% 14 May, 2026
13 Lawrence D Kingsley Director 92,616 0 92,616 0.2% 30 Jun, 2026
14 Robert Cascella Director 80,892 0 80,892 0.2% 14 May, 2026
15 Sheila Rege Director 59,044 0 59,044 0.1% 14 May, 2026
16 Alison Ulrich Chief Human Resources Officer 36,235 0 36,235 0.1% 02 Apr, 2026
17 Christopher A. Moore Chief Accounting Officer (Pao) 22,157 0 22,157 0.1% 08 May, 2026

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

288 Insider Transactions

Source SEC Form 4
Latest quarter Sep 2026
Download Data
Date Insider Position Transaction Shares Price Value Shares Held After Ownership
02 Sep, 2026 Brian Schopfer Chief Financial Officer Acquired P 20,000 $15.60 $312.00K 933,290 Direct
30 Jun, 2026 Lawrence D Kingsley Director Acquired A 1,095 $17.46 $19.12K 72,525 Direct
13 May, 2026 Robert Cascella Director Acquired A 7,383 $0.00 $0 60,801 Direct
13 May, 2026 Lawrence D Kingsley Director Acquired A 7,383 $0.00 $0 71,430 Direct
13 May, 2026 Jody Markopoulos Director Acquired A 7,383 $0.00 $0 81,509 Direct
13 May, 2026 Kenneth Bockhorst Director Acquired A 7,383 $0.00 $0 77,258 Direct
13 May, 2026 John W Kuo Director Acquired A 7,383 $0.00 $0 80,119 Direct
13 May, 2026 Sheila Rege Director Acquired A 7,383 $0.00 $0 49,877 Direct
13 May, 2026 Steven W. Etzel Director Acquired A 7,383 $0.00 $0 87,448 Direct
07 May, 2026 Christopher A. Moore Chief Accounting Officer (Pao) Disposed S 8,400 $19.64 $164.98K 22,157 Direct
06 May, 2026 Thomas D Logan Chief Executive Officer Disposed G 311,851 $0.00 $0 52,209 Direct
01 Apr, 2026 Alison Ulrich Chief Human Resources Officer Disposed F 2,053 $18.59 $38.17K 36,235 Direct
01 Apr, 2026 Thomas D Logan Chief Executive Officer Disposed F 22,614 $18.59 $420.39K 364,060 Direct
01 Apr, 2026 Christopher A. Moore Chief Accounting Officer (Pao) Disposed F 1,903 $18.59 $35.38K 30,557 Direct
01 Apr, 2026 Brian Schopfer Chief Financial Officer Disposed F 7,377 $18.59 $137.14K 913,290 Direct
31 Mar, 2026 Lawrence D Kingsley Director Acquired A 1,104 $17.32 $19.12K 64,047 Direct
01 Apr, 2026 Emmanuelle Lee Chief Legal Officer Disposed F 4,680 $18.59 $87.00K 82,431 Direct
01 Mar, 2026 Thomas D Logan Chief Executive Officer Disposed F 20,650 $21.61 $446.25K 3,289,038 Direct
01 Mar, 2026 Christopher A. Moore Chief Accounting Officer (Pao) Acquired A 5,552 $0.00 $0 33,857 Direct
01 Mar, 2026 Alison Ulrich Chief Human Resources Officer Acquired A 5,552 $0.00 $0 40,648 Direct