Mirion Ownership | Who Owns Mirion?

Overview Forecast RevenueFinancials Chart Transcripts

Mirion Ownership Summary

Mirion is owned by 26.79% institutional investors, 3.72% insiders, and 69.49% retail investors. Blackrock funding, inc. /de is the largest institutional shareholder, holding 16.17% of MIR shares. Vanguard US Total Market Shares ETF is the top mutual fund, with 2.74% of its assets in Mirion shares.

MIR Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Mirion	26.79%	3.72%	69.49%
Sector	Industrials Stocks	46.77%	12.62%	40.60%
Industry	Industrial Machinery Stocks	54.58%	8.80%	36.63%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Blackrock funding, inc. /de	36.43M	16.17%	$847.37M
Vanguard group	30.42M	13.50%	$707.53M
T. rowe price investment management	21.57M	9.57%	$501.64M
Blackrock	15.80M	7.91%	$169.72M
Tudor investment corp et al	17.50M	7.77%	$18.81M
Janus henderson group	8.33M	4.03%	$145.37M
Fmr	9.08M	4.03%	$211.16M
State street	8.82M	3.91%	$205.07M
Cooperman leon g	8.38M	3.72%	$195.00M
Dimensional fund advisors lp	6.21M	2.75%	$144.36M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Cooperman leon g	8.38M	6.09%	$195.00M
Two creeks capital management, lp	3.60M	6.02%	$83.71M
Corsair capital management	1.05M	4.02%	$24.33M
Element capital management	115.58K	3.81%	$2.69M
Chescapmanager	1.66M	3.69%	$38.59M
Pier capital	794.83K	2.89%	$18.49M
Keystone investors pte	881.59K	2.37%	$20.51M
Hollow brook wealth management	255.72K	1.41%	$5.95M
Alta park capital, lp	611.16K	1.24%	$14.22M
Aperture investors	380.10K	1.21%	$8.84M

Top Buyers

Holder	Shares	% Assets	Change
Blackrock funding, inc. /de	36.43M	0.01%	19.42M
Tudor investment corp et al	17.50M	0.03%	17.50M
Fmr	9.08M	0.01%	8.13M
Vanguard group	30.42M	0.01%	6.65M
Goldman sachs group	5.05M	0.01%	4.42M

Top Sellers

Holder	Shares	% Assets	Change
P2 capital partners	-	-	-3.35M
Maverick capital	2.59M	0.80%	-2.72M
Brown advisory	2.72M	0.08%	-2.68M
Artemis investment management llp	953.41K	0.28%	-2.08M
Corsair capital management	1.05M	4.02%	-1.98M

New Positions

Holder	Shares	% Assets	Change	Value
Two creeks capital management, lp	3.60M	6.02%	3.60M	$83.71M
Conestoga capital advisors	1.35M	0.50%	1.35M	$31.44M
Timessquare capital management	1.01M	0.34%	1.01M	$23.57M
Public sector pension investment board	956.16K	0.08%	956.16K	$22.24M
Keystone investors pte	881.59K	2.37%	881.59K	$20.51M

Sold Out

Holder	Change
Claris advisors, llc / mo /	-12.00
Physician wealth advisors	-29.00
Stephens consulting	-75.00
Capital performance advisors llp	-77.00
Mount yale investment advisors	-100.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Sep 30, 2025	135	-57.81%	60,365,470	-71.00%	26	0.31%	85	-60.65%	29	-56.06%
Jun 30, 2025	318	35.32%	208,025,833	10.61%	92	1.33%	216	57.66%	64	-7.25%
Mar 31, 2025	233	0.43%	184,689,767	-4.20%	81	0.98%	136	-12.82%	69	27.78%
Dec 31, 2024	221	22.78%	183,252,476	-10.67%	88	0.90%	146	33.95%	53	26.19%
Sep 30, 2024	179	13.29%	205,122,767	3.97%	99	1.02%	108	17.39%	42	-6.67%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Vanguard US Total Market Shares ETF	6.34M	2.74%	519.30K
Vanguard Total Stock Mkt Idx Inv	6.04M	2.62%	-126.59K
T. Rowe Price US Small-Cap Core Equity	5.76M	2.50%	220.07K
Janus Henderson US SMID Cap Growth MA	5.75M	2.50%	5.75M
Janus Henderson US SMID Cap Growth	5.75M	2.50%	-821.39K
Janus Henderson Triton D	5.75M	2.50%	-821.39K
T. Rowe Price Small-Cap Stock	5.75M	2.50%	-4.64K
iShares Russell 2000 ETF	5.09M	2.21%	-
Vanguard Small Cap Index	4.66M	2.02%	-27.51K
Vanguard Information Technology ETF	4.64M	2.01%	47.25K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Nov 21, 2025	Kingsley Lawrence D	-	Sell	$7.15M
Nov 11, 2025	Eloy Loic	Nuclear & Safety President	Sell	$1.23M
Nov 10, 2025	Lee Emmanuelle	Chief Legal Officer	Sell	$342.64K
Nov 06, 2025	Schopfer Brian	Chief Financial Officer	Sell	$1.38M
Nov 06, 2025	Schopfer Brian	Chief Financial Officer	Sell	$1.38M

Insider Transactions Trends

Date	Buy	Sell
2025 Q4	-	5
2025 Q3	-	3
2025 Q2	-	4
2025 Q1	-	-
2024 Q4	-	3

MIR Ownership FAQ

Who Owns Mirion?

Mirion shareholders are primarily institutional investors at 26.79%, followed by 3.72% insiders and 69.49% retail investors. The average institutional ownership in Mirion's industry, Industrial Machinery Stocks, is 54.58%, which Mirion falls below.

Who owns the most shares of Mirion?

Mirion’s largest shareholders are Blackrock funding, inc. /de (36.43M shares, 16.17%), Vanguard group (30.42M shares, 13.50%), and T. rowe price investment management (21.57M shares, 9.57%). Together, they hold 39.24% of Mirion’s total shares outstanding.

Does Blackrock own Mirion?

Yes, BlackRock owns 7.91% of Mirion, totaling 15.8M shares as of Jun 2024. This represents 0.00% of BlackRock's total assets, with a market value of 169.72M$. In the last quarter, BlackRock increased its holdings by 246.89K shares, a 1.59% change.

Who is Mirion’s biggest shareholder by percentage of total assets invested?

Cooperman leon g is Mirion’s biggest shareholder by percentage of total assets invested, with 6.09% of its assets in 8.38M Mirion shares, valued at 195M$.

Who is the top mutual fund holder of Mirion shares?

Vanguard US Total Market Shares ETF is the top mutual fund holder of Mirion shares, with 2.74% of its total shares outstanding invested in 6.34M Mirion shares.

Try Tickergate Pro Free

Customize Everything. 100% Flexibility. Fast and Easy to Use (No code or Excel Needed)

Customize your own personal stocks lists, views and charts
Choose from hundreds of fields, up to 15 years of history
Conduct deep comparison analysis

Discover trending investment themes
Find your next best investment
Research stocks using tools