MIRION TECHNOLOGIES INC

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MIR·60471A101·US·Common Stock·Industrials - Specialty Industrial Machinery-13D/G

MIR (MIRION TECHNOLOGIES INC) is held by 179 institutional investors as of Q1 2026. Largest holders: BlackRock, Inc. ($703.8M), VANGUARD PORTFOLIO MANAGEMENT LLC ($332.9M), VANGUARD CAPITAL MANAGEMENT LLC ($195.3M). Net institutional sentiment: Mixed. In Q1 2026, 1 member of Congress and 105 funds bought MIR.

179

Holders

(18 Elite)

$3.9B

Total Value

54% (196)

Consensus

105 buying - 91 selling

13F: Mar 31, 2026Insider & Congress: Updated regularly

Smart Money Verdict

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Institutional (13F)

Insider (Form 4)

Activist (13D/13G)

Congressional (STOCK Act)

Holder Quality

★★★★★

Elite

★★★★

Strong

★★★

Solid

★★

Below

★

Weak

Held by 179 funds

18 elite

Who's Trading

InsiderMAMoore Christopher A.Sell $165KMay 7, 2026

InsiderLDLogan Thomas DGift 312K shMay 6, 2026

ActivistVAVanguard Capital Management5.0%Apr 30, 2026

ActivistVPVanguard Portfolio Management7.4%Apr 29, 2026

ActivistThe Vanguard Group0.0%Mar 27, 2026

CongressRohit KhannaBuy $50,001 - $100,000Feb 17, 2026

ActivistTRT. Rowe Price Investment Management, Inc.6.1%Feb 17, 2026

InsiderKDKingsley Lawrence DSell $8.7MDec 10, 2025

InsiderKDKingsley Lawrence DSell $7.1MNov 21, 2025

CongressRohit KhannaBuySep 24, 2025

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Top Holders

Top Holders (179)History

AllNewIncreasedHeldDecreasedExited

Fund	Action	Shares	Value	Weight	Est. P&L	Conviction
BlackRock, Inc.	Decreased	37.9M(-0.9%)	$703.8M	0.0%	-16.67%	0
VPVANGUARD PORTFOLIO MANAGEMENT LLC	New	17.9M	$332.9M	0.0%	-22.37%	43
VAVANGUARD CAPITAL MANAGEMENT LLC	New	10.5M	$195.3M	0.0%	-22.37%	42
STATE STREET CORP	Increased	9.4M(+2.5%)	$175.3M	0.0%	+6.67%	31
CLCOOPERMAN LEON G	Unchanged	8.4M	$155.8M	5.1%	+57.84%	0
GOLDMAN SACHS GROUP INC	Increased	7.3M(+40.0%)	$136.6M	0.0%	-22.55%	40
FMR LLC	Decreased	6.6M(-22.1%)	$121.8M	0.0%	-23.60%	0
GEODE CAPITAL MANAGEMENT, LLC	Increased	5.9M(+2.6%)	$110.4M	0.0%	+49.12%	31
MILLENNIUM MANAGEMENT LLC	New	5.1M	$94.9M	0.0%	-22.37%	41
DIMENSIONAL FUND ADVISORS LP	Increased	4.7M(+14.4%)	$87.2M	0.0%	+47.63%	34
Bank of New York Mellon Corp	Increased	4.5M(+47.4%)	$84.3M	0.0%	-17.51%	41
Janus Henderson Group Ltd.	Decreased	4M(-12.1%)	$75.2M	0.0%	+117.74%	0
UBS Group AG	Decreased	3.8M(-22.4%)	$70M	0.0%	-15.10%	0
Swedbank AB	Decreased	3.2M(-7.0%)	$58.7M	0.1%	+58.29%	0
AMERICAN CENTURY COMPANIES INC	Increased	2.7M(+6.9%)	$50.8M	0.0%	+44.55%	31
AIAlyeska Investment Group, L.P.	Increased	2.7M(+76.4%)	$50.2M	0.1%	+7.50%	53
LOOMIS SAYLES & CO L P	Decreased	2.7M(-6.2%)	$49.6M	0.1%	-23.04%	0
MAVERICK CAPITAL LTD	New	2.6M	$49.3M	0.6%	-22.37%	57
JPMORGAN CHASE & CO	Increased	2.6M(+56.8%)	$45.4M	0.0%	-25.22%	41
NORTHERN TRUST CORP	Increased	2.4M(+1.5%)	$44M	0.0%	+48.83%	30

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High Conviction Moves-Smart Money Convergence-Fund Consensus-Double-Down Detection

Data sourced from four SEC data sources: 13F, Form 4, 13D/13G, and STOCK Act. Not financial advice. Full disclaimer