Mirion Technologies, Inc. (MIR) — Institutional Holders, Q2 2026

354 institutional investment managers reported a MIR position on SEC Form 13F-HR for the quarter ended June 30, 2026, with a combined reported value of $4.7B. Every filer is listed below, ranked by position value, 100 per page; this page shows ranks 1 to 100. Put and call option positions are excluded, and a firm filing several lots or share classes is shown once with its total.

← MIR stock profile

MIR in Q2 2026: what funds did

Funds that filed a 13F for both Q1 2026 and Q2 2026, by what they did with the common stock. Share counts are adjusted for any split between the two quarters; dollar figures are the change in shares at this quarter’s price.

New positions

Added to

136

Trimmed

118

Sold out

Biggest buyers

Alyeska Investment Group, L.P.Added · +6,833,375 sh+$122.5M
CONGRESS ASSET MANAGEMENTAdded · +5,571,373 sh+$99.9M
GOLDMAN SACHS GROUPAdded · +3,056,937 sh+$54.8M
BAMCOAdded · +2,692,335 sh+$48.3M
MAVERICK CAPITAL LTDAdded · +2,595,160 sh+$46.5M

Biggest sellers

MILLENNIUM MANAGEMENTTrimmed · -4,115,060 sh-$73.8M
Bank of New York MellonTrimmed · -3,155,058 sh-$56.6M
Two Creeks Capital ManagementSold out · -2,449,059 sh-$43.9M
CITADEL ADVISORSTrimmed · -1,790,456 sh-$32.1M
ALLIANCEBERNSTEIN L.P.Trimmed · -1,320,912 sh-$23.7M

MIR 13F holders ranked 1–100 of 354

Institutional investors reporting a position in Mirion Technologies, Inc. on SEC Form 13F-HR for Q2 2026, ranked by reported value.
#	Institution	Shares	Value	% of portfolio	QoQShares vs Q1 2026
1	BlackRock#1 · 38,262,307 sh	38,262,307	$686.0M	0.01%	+1.1%
2	VANGUARD PORTFOLIO MANAGEMENT#2 · 18,179,850 sh	18,179,850	$326.0M	0.01%	+1.5%
3	T. Rowe Price Investment Management#3 · 14,288,075 sh	14,288,075	$256.2M	0.17%	-2.3%
4	VANGUARD CAPITAL MANAGEMENT#4 · 10,613,869 sh	10,613,869	$190.3M	<0.01%	+1.0%
5	GOLDMAN SACHS GROUP#5 · 10,406,605 sh	10,406,605	$186.6M	0.02%	+41.6%
6	STATE STREET#6 · 9,923,609 sh	9,923,609	$177.9M	<0.01%	+5.2%
7	Alyeska Investment Group, L.P.#7 · 9,534,955 sh	9,534,955	$171.0M	0.44%	+252.9%
8	COOPERMAN LEON G#8 · 8,383,441 sh	8,383,441	$150.3M	4.24%	0.0%
9	FMR#9 · 7,329,386 sh	7,329,386	$131.4M	<0.01%	+11.9%
10	CONGRESS ASSET MANAGEMENT#10 · 6,685,434 sh	6,685,434	$119.9M	—	+500.1%
11	GEODE CAPITAL MANAGEMENT#11 · 6,280,048 sh	6,280,048	$112.6M	<0.01%	+5.7%
12	MAVERICK CAPITAL LTD#12 · 5,245,039 sh	5,245,039	$94.0M	0.83%	+97.9%
13	DIMENSIONAL FUND ADVISORS#13 · 4,859,755 sh	4,859,755	$87.1M	0.02%	+3.5%
14	Jupiter Topco#14 · 4,114,766 sh	4,114,766	$73.8M	0.03%	—
15	BAMCO#15 · 3,906,083 sh	3,906,083	$70.0M	0.11%	+221.8%
16	MORGAN STANLEY#16 · 3,896,754 sh	3,896,754	$69.9M	<0.01%	+70.5%
17	Neuberger Berman Group#17 · 3,199,539 sh	3,199,539	$57.4M	0.04%	+273.6%
18	AMERICAN CENTURY COMPANIES#18 · 3,176,241 sh	3,176,241	$57.0M	0.03%	+16.2%
19	Invesco Ltd.#19 · 2,769,589 sh	2,769,589	$49.7M	<0.01%	+20.7%
20	UBS Group AG#20 · 2,686,713 sh	2,686,713	$48.2M	<0.01%	-28.7%
21	NORTHERN#21 · 2,586,059 sh	2,586,059	$46.4M	<0.01%	+9.3%
22	JPMORGAN CHASE#22 · 2,606,507 sh	2,606,507	$45.7M	<0.01%	-0.5%
23	Swedbank AB#23 · 2,531,200 sh	2,531,200	$45.4M	—	-19.9%
24	LOOMIS SAYLES & L P#24 · 2,525,188 sh	2,525,188	$45.3M	0.06%	-5.4%
25	CHARLES SCHWAB INVESTMENT MANAGEMENT#25 · 2,447,222 sh	2,447,222	$43.9M	<0.01%	+7.5%
26	TCW GROUP#26 · 2,255,645 sh	2,255,645	$40.4M	0.27%	+0.8%
27	Nuveen#27 · 2,109,181 sh	2,109,181	$37.8M	<0.01%	+8.2%
28	ROYAL BANK OF CANADA#28 · 1,782,618 sh	1,782,618	$32.0M	<0.01%	-9.1%
29	VANGUARD FIDUCIARY#29 · 1,723,956 sh	1,723,956	$30.9M	<0.01%	+1.7%
30	Stephens Investment Management Group#30 · 1,678,373 sh	1,678,373	$30.1M	0.32%	+22.1%
31	Chescapmanager#31 · 1,659,137 sh	1,659,137	$29.7M	2.53%	0.0%
32	DAVIDSON KEMPNER CAPITAL MANAGEMENT#32 · 1,619,998 sh	1,619,998	$29.0M	0.35%	+23.2%
33	Select Equity Group, L.P.#33 · 1,576,023 sh	1,576,023	$28.3M	0.14%	+49.3%
34	SCHRODER INVESTMENT MANAGEMENT GROUP#34 · 1,594,840 sh	1,594,840	$27.8M	0.02%	+40.4%
35	Troluce Capital Advisors#35 · 1,539,212 sh	1,539,212	$27.6M	2.84%	+2.6%
36	Rockefeller Capital Management L.P.#36 · 1,466,144 sh	1,466,144	$26.3M	0.04%	+5.3%
37	TimesSquare Capital Management#37 · 1,400,642 sh	1,400,642	$25.1M	0.37%	+8.2%
38	Bank of New York Mellon#38 · 1,381,674 sh	1,381,674	$24.8M	<0.01%	-69.5%
39	EMERALD ADVISERS#39 · 1,364,780 sh	1,364,780	$24.5M	0.58%	-1.2%
40	Conestoga Capital Advisors#40 · 1,248,061 sh	1,248,061	$22.4M	0.49%	-31.8%
41	RAYMOND JAMES FINANCIAL#41 · 1,196,716 sh	1,196,716	$21.5M	<0.01%	+11.3%
42	PRINCIPAL FINANCIAL GROUP#42 · 1,194,106 sh	1,194,106	$21.4M	0.01%	-0.2%
43	ROYAL LONDON ASSET MANAGEMENT LTD#43 · 1,176,241 sh	1,176,241	$21.1M	0.04%	New
44	BANK OF AMERICA#44 · 1,158,094 sh	1,158,094	$20.8M	<0.01%	-14.6%
45	SEGALL BRYANT & HAMILL#45 · 1,131,124 sh	1,131,124	$20.3M	0.24%	0.0%
46	WELLINGTON MANAGEMENT GROUP LLP#46 · 1,098,987 sh	1,098,987	$19.7M	<0.01%	+31.2%
47	Clearbridge Investments#47 · 1,096,729 sh	1,096,729	$19.7M	0.02%	New
48	AMERIPRISE FINANCIAL#48 · 1,002,284 sh	1,002,284	$18.0M	<0.01%	-22.3%
49	MILLENNIUM MANAGEMENT#49 · 991,741 sh	991,741	$17.8M	<0.01%	-80.6%
50	JENNISON ASSOCIATES#50 · 887,170 sh	887,170	$15.9M	<0.01%	-5.9%
51	FRANKLIN RESOURCES#51 · 884,482 sh	884,482	$15.9M	<0.01%	-55.7%
52	EMERALD MUTUAL FUND ADVISERS#52 · 873,466 sh	873,466	$15.7M	0.55%	0.0%
53	CORSAIR CAPITAL MANAGEMENT, L.P.#53 · 867,670 sh	867,670	$15.6M	1.94%	-11.7%
54	SEI INVESTMENTS#54 · 849,475 sh	849,475	$15.2M	0.01%	+85.3%
55	Allspring Global Investments#55 · 846,790 sh	846,790	$15.2M	0.02%	-20.0%
56	Toroso Investments#56 · 840,683 sh	840,683	$15.1M	0.03%	+8.5%
57	PUBLIC SECTOR PENSION INVESTMENT BOARD#57 · 840,519 sh	840,519	$15.1M	0.04%	-4.0%
58	SILVERCREST ASSET MANAGEMENT GROUP#58 · 813,203 sh	813,203	$14.6M	0.10%	+19.5%
59	FEDERATED HERMES#59 · 797,538 sh	797,538	$14.3M	0.02%	-2.3%
60	MASSACHUSETTS FINANCIAL SERVICES#60 · 760,985 sh	760,985	$13.6M	<0.01%	-52.1%
61	WELLS FARGO & COMPANY#61 · 713,358 sh	713,358	$12.8M	<0.01%	+5.1%
62	NOMURA#62 · 709,604 sh	709,604	$12.7M	0.01%	-7.2%
63	Pier Capital#63 · 696,047 sh	696,047	$12.5M	1.65%	-1.1%
64	DEUTSCHE BANK AG\#64 · 684,849 sh	684,849	$12.3M	<0.01%	+11.7%
65	Point72 Asset Management, L.P.#65 · 677,509 sh	677,509	$12.1M	0.01%	+288.8%
66	OSAIC#66 · 670,489 sh	670,489	$12.0M	0.01%	+262.3%
67	abrdn plc#67 · 627,585 sh	627,585	$11.3M	0.02%	+37.5%
68	ExodusPoint Capital Management#68 · 605,134 sh	605,134	$10.9M	0.07%	New
69	NISSAY ASSET MANAGEMENT /JAPAN#69 · 599,278 sh	599,278	$10.7M	0.05%	New
70	CITIGROUP#70 · 598,776 sh	598,776	$10.7M	<0.01%	-42.9%
71	ArrowMark Colorado#71 · 588,240 sh	588,240	$10.5M	0.44%	+2.3%
72	WCM INVESTMENT MANAGEMENT#72 · 591,279 sh	591,279	$10.3M	0.02%	New
73	SCHWARTZ INVESTMENT COUNSEL#73 · 573,910 sh	573,910	$10.3M	—	-32.8%
74	RHUMBLINE ADVISERS#74 · 568,321 sh	568,321	$10.2M	<0.01%	-10.4%
75	Legal & General Group Plc#75 · 542,835 sh	542,835	$9.7M	<0.01%	-2.4%
76	GAMCO INVESTORS, ET AL#76 · 535,270 sh	535,270	$9.6M	0.09%	-1.7%
77	PEREGRINE CAPITAL MANAGEMENT#77 · 502,843 sh	502,843	$9.0M	0.29%	+8.8%
78	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AME#78 · 480,488 sh	480,488	$8.6M	<0.01%	-5.3%
79	Swiss National Bank#79 · 465,900 sh	465,900	$8.4M	<0.01%	0.0%
80	BNP PARIBAS FINANCIAL MARKETS#80 · 450,934 sh	450,934	$8.1M	<0.01%	-59.4%
81	Robeco Schweiz AG#81 · 424,000 sh	424,000	$7.6M	—	+84.3%
82	PRICE T ROWE ASSOCIATES#82 · 421,193 sh	421,193	$7.6M	<0.01%	+10.0%
83	EXCHANGE TRADED CONCEPTS#83 · 420,398 sh	420,398	$7.5M	0.03%	+3.3%
84	Montanaro Asset Management Ltd#84 · 418,646 sh	418,646	$7.5M	2.37%	+37.1%
85	D. E. Shaw#85 · 400,454 sh	400,454	$7.2M	<0.01%	-14.5%
86	ZEVENBERGEN CAPITAL INVESTMENTS#86 · 400,300 sh	400,300	$7.2M	—	+22.7%
87	LAZARD ASSET MANAGEMENT#87 · 392,003 sh	392,003	$7.0M	0.01%	+21.6%
88	TD ASSET MANAGEMENT#88 · 389,798 sh	389,798	$7.0M	<0.01%	+12.0%
89	ENVESTNET ASSET MANAGEMENT#89 · 386,193 sh	386,193	$6.9M	<0.01%	+14.0%
90	BANK OF NOVA SCOTIA#90 · 373,629 sh	373,629	$6.7M	0.01%	-1.7%
91	Bridgewater Associates#91 · 359,138 sh	359,138	$6.4M	0.03%	+2.1%
92	GABELLI FUNDS#92 · 351,160 sh	351,160	$6.3M	0.04%	-4.6%
93	Burkehill Global Management#93 · 350,000 sh	350,000	$6.3M	0.23%	0.0%
94	ROYCE & ASSOCIATES#94 · 347,262 sh	347,262	$6.2M	0.05%	-23.1%
95	ALLIANCEBERNSTEIN L.P.#95 · 332,517 sh	332,517	$6.2M	<0.01%	-79.9%
96	HRT FINANCIAL#96 · 539,916 sh	539,916	$6.1M	0.02%	+170.0%
97	Holocene Advisors#97 · 337,724 sh	337,724	$6.1M	0.01%	+297.0%
98	ARDSLEY ADVISORY PARTNERS#98 · 325,000 sh	325,000	$5.8M	0.61%	0.0%
99	Sumitomo Mitsui DS Asset Management Company, Ltd#99 · 322,714 sh	322,714	$5.8M	—	-11.2%
100	FRONTIER CAPITAL MANAGEMENT#100 · 298,979 sh	298,979	$5.4M	0.05%	New

Funds that sold out of MIR in Q2 2026 (66)

Held MIR at the end of Q1 2026 and filed a Q2 2026 13F without it. Not in the list above, because they no longer hold it. Largest prior position first.

Institutions that held MIR in Q1 2026 and reported no position in Q2 2026.
Institution	Shares sold	Value in Q1 2026
Two Creeks Capital Management2,449,059 sh	2,449,059	$45.5M
BROWN ADVISORY1,300,073 sh	1,300,073	$24.2M
Daiwa Securities Group1,217,497 sh	1,217,497	$22.6M
Alta Park Capital977,138 sh	977,138	$18.2M
LORD, ABBETT937,044 sh	937,044	$17.4M
OBERWEIS ASSET MANAGEMENT744,267 sh	744,267	$13.8M
Artemis Investment Management LLP539,134 sh	539,134	$10.0M
ZACKS INVESTMENT MANAGEMENT388,877 sh	388,877	$7.2M
Aperture Investors151,685 sh	151,685	$2.8M
DDD Partners142,790 sh	142,790	$2.7M
UniSuper Management Pty Ltd129,502 sh	129,502	$2.4M
Qube Research & Technologies Ltd123,462 sh	123,462	$2.3M
FIRST NATIONAL BANK OF OMAHA113,516 sh	113,516	$2.1M
Dana Investment Advisors83,120 sh	83,120	$1.5M
CAPSTONE INVESTMENT ADVISORS75,700 sh	75,700	$1.4M
Tribune Investment Group65,000 sh	65,000	$1.2M
Asset Management One , Ltd.55,723 sh	55,723	$1.0M
THORNBURG INVESTMENT MANAGEMENT51,597 sh	51,597	$959.2K
PEAK650,935 sh	50,935	$946.9K
Nicholas Investment Partners49,278 sh	49,278	$916.1K
Hudson Bay Capital Management46,270 sh	46,270	$860.2K
Blackstone42,414 sh	42,414	$788.5K
Twin Tree Management38,075 sh	38,075	$707.8K
AXQ CAPITAL28,167 sh	28,167	$523.6K
VAN ECK ASSOCIATES28,073 sh	28,073	$522.0K
POLEN CAPITAL MANAGEMENT24,921 sh	24,921	$463.3K
Squarepoint Ops21,567 sh	21,567	$400.9K
Janney Montgomery Scott21,039 sh	21,039	$391.0K
SANDLER CAPITAL MANAGEMENT18,982 sh	18,982	$352.9K
SCP Investment18,800 sh	18,800	$349.5K
Jain Global18,001 sh	18,001	$334.6K
AlphaGrep UK Ltd15,430 sh	15,430	$286.8K
CenterBook Partners15,373 sh	15,373	$285.8K
MARIETTA INVESTMENT PARTNERS14,833 sh	14,833	$275.7K
Tributary Capital Management14,800 sh	14,800	$275.1K
MIRABELLA FINANCIAL SERVICES LLP14,273 sh	14,273	$265.3K
TWINBEECH CAPITAL14,008 sh	14,008	$260.4K
AIGEN INVESTMENT MANAGEMENT10,827 sh	10,827	$201.3K
PARK AVENUE SECURITIES10,816 sh	10,816	$201.0K
Beacon Pointe Advisors10,694 sh	10,694	$198.8K
Premier Fund Managers Ltd11,192 sh	11,192	$194.0K
PRELUDE CAPITAL MANAGEMENT10,000 sh	10,000	$185.9K
Tredje AP-fonden4,662 sh	4,662	$86.7K
NBC SECURITIES3,891 sh	3,891	$72.3K
Aster Capital Management (DIFC) Ltd4,804 sh	4,804	$69.7K
QUADRANT CAPITAL GROUP2,130 sh	2,130	$68.8K
REAP Financial Group1,415 sh	1,415	$26.3K
MAI Capital Management1,325 sh	1,325	$24.6K
Strive Financial Group983 sh	983	$18.0K
CULLEN/FROST BANKERS838 sh	838	$15.6K
Raleigh Capital Management798 sh	798	$14.8K
Transamerica Financial Advisors659 sh	659	$12.3K
Root Financial Partners615 sh	615	$11.4K
Golden State Equity Partners510 sh	510	$9.5K
HARBOUR INVESTMENTS486 sh	486	$9.1K
CoreCap Advisors356 sh	356	$6.6K
PRIVATE NA201 sh	201	$3.7K
WHITTIER195 sh	195	$3.7K
Quarry122 sh	122	$2.3K
Richardson Capital Management89 sh	89	$1.7K
TWIN PEAKS WEALTH ADVISORS74 sh	74	$1.4K
MassMutual Private Wealth & , FSB11 sh	11	$204.00
Vermillion Wealth Management11 sh	11	$204.00
Dunhill Financial4 sh	4	$83.00
Hughes Financial Services1 sh	1	$19.00
James T. Borello RIA1 sh	1	$19.00

Source: Form 13F-HR filings on SEC EDGAR, Q2 2026. Values are as reported by each manager at quarter end. “% of portfolio” is the position’s share of the manager’s total reported 13F value for the same quarter. “New” means the manager filed a 13F for Q1 2026 without this position; a dash means no comparison is available. Where a manager’s own filing is internally inconsistent its value is withheld and it is listed last. 13F data shows reported holdings, not recommendations.