Mirion Technologies, Inc. (MIR) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

255,662,000Shares Outstanding

262,186,532Shares held by institutions

$4,960,569,185Value of institutional holdings

102.55%Institutional ownership %

5.70%Shares Changed QoQ

353No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

Mirion Technologies, Inc. (NYSE:MIR) has 353 institutional investors with active 13F positions as of December 2025.

They owned 100.1% of outstanding stock in December 2025, down from 107.4% the prior quarter.
They increased total shares held in Mirion Technologies by 3.86% from last quarter, and the number of investors in MIR increased 58.3% annually.
Of these 353 funds, 223 grew their exposure to Mirion Technologies, 93 cut back, and 37 maintained positions.
The aggregate institutional position in Mirion Technologies amounted to 255.79Mn shares as of December 2025, up by 9.51Mn shares quarter on quarter, and up 58.14Mn shares year over year.
Conestoga Capital Advisors, LLC leads ownership in MIR with 1.83Mn shares as of December 31, 2025, equal to 0.72% of outstanding shares.
Top purchasers of MIR stock for the quarter ending December 2025 included CONGRESS ASSET MANAGEMENT CO (1.11Mn), Covea Finance (119.2K), EXCHANGE TRADED CONCEPTS, LLC (113.19K), PEREGRINE CAPITAL MANAGEMENT LLC (59.26K), TEMA ETFS LLC (50.78K).
The biggest sellers of Mirion Technologies for the quarter ending December 2025 included Artemis Investment Management LLP (1.43Mn), Conestoga Capital Advisors, LLC (107.83K), Sumitomo Mitsui DS Asset Management Company, Ltd (35.94K), Sterling Capital Management LLC (30.57K), SG Americas Securities, LLC (18.04K).
Per Business Quant data, the top 10 holders of Mirion Technologies for the quarter ending December 2025 are Conestoga Capital Advisors, LLC (1.83Mn), CONGRESS ASSET MANAGEMENT CO (1.11Mn), Artemis Investment Management LLP (539.13K), PEREGRINE CAPITAL MANAGEMENT LLC (462.38K), EXCHANGE TRADED CONCEPTS, LLC (406.98K), Sumitomo Mitsui DS Asset Management Company, Ltd (363.6K), TEMA ETFS LLC (155.74K), State of Alaska, Department of Revenue (131.84K), Covea Finance (119.2K), Louisiana State Employees Retirement System (108.5K).

353 Institutional Holders

262,186,532 Total Shares Held

Rows:

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Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
BlackRock, Inc.	31 Dec, 2025	38,199,968	1,769,477	4.86%	$894,643,252.00
VANGUARD GROUP INC	31 Dec, 2025	30,346,328	-71,999	-0.24%	$710,711,002.00
T. Rowe Price Investment Management, Inc.	31 Dec, 2025	17,441,857	-4,124,785	-19.13%	$408,490.00
Goldman Sachs Group Inc	31 Dec, 2025	10,497,012	5,442,420	107.67%	$245,840,022.00
State Street Corp	31 Dec, 2025	9,198,795	382,449	4.34%	$215,435,779.00
FMR LLC	31 Dec, 2025	8,414,300	-664,001	-7.31%	$197,062,906.00
COOPERMAN LEON G	31 Dec, 2025	8,383,441	0	0.00%	$196,340,188.00
Swedbank AB	31 Dec, 2025	6,796,400	2,791,200	69.69%	$159,171,688.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	5,786,596	157,687	2.80%	$135,545,437.00
UBS Group AG	31 Dec, 2025	4,852,587	55,754	1.16%	$113,647,588.00
Janus Henderson Group Plc	31 Dec, 2025	4,596,949	-3,064,988	-40.00%	$107,660,006.00
DIMENSIONAL FUND ADVISORS LP	31 Dec, 2025	4,102,558	-2,104,375	-33.90%	$96,087,235.00
MASSACHUSETTS FINANCIAL SERVICES CO /MA/	31 Dec, 2025	3,663,479	-1,728,293	-32.05%	$85,798,680.00
Invesco Ltd.	31 Dec, 2025	3,101,120	344,230	12.49%	$72,628,231.00
Bank of New York Mellon Corp	31 Dec, 2025	3,076,945	1,716,020	126.09%	$72,062,067.00
Two Creeks Capital Management, LP	31 Dec, 2025	2,923,802	-674,961	-18.76%	$68,475,443.00
LOOMIS SAYLES & CO L P	31 Dec, 2025	2,845,619	84,084	3.04%	$66,644,397.00
Hood River Capital Management LLC	31 Dec, 2025	2,780,137	16,853	0.61%	$65,110,809.00
AMERICAN CENTURY COMPANIES INC	31 Dec, 2025	2,556,724	-672,814	-20.83%	$59,878,517.00
TCW GROUP INC	31 Dec, 2025	2,452,579	2,452,579	0.00%	$57,439,400.00

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