MIRMirion Technologies, Inc.

$14.90

Who owns MIR

355 institutions reported holding MIR for 2026Q1, together 103% of the company, fewer than the 359 a quarter earlier.

355

Institutions reporting a position · as of 2026Q1 · down from 359 the quarter before

Shares held by institutions
252.9M

Shares held by institutions · 103% of the company · long US equity positions only, as reported on Form 13F

Reported value
$4.70B

Reported value · at 2026-03-31 prices, not today's

Top 5 holders
41%

Top 5 holders · of the whole company, between five filers

Details
Reporting quarter2026-03-31
2026Q1
Quarters on record
19
New positions
52
Positions exited
61
Added to
124
Reduced
127
Top 10 holdersof the company
53%
Institutional ownership by quarter, 2021Q3 to 2026Q1
QuarterFilersSharesReported value
2026Q1355252.9M$4.70B
2025Q4359251.4M$5.89B
2025Q3337254.4M$5.92B
2025Q2297206.7M$4.45B
2025Q1228185.1M$2.68B
2024Q4221193.7M$3.38B
2024Q3173204.8M$2.27B
2024Q2152197.0M$2.12B
2024Q1142188.1M$2.14B
2023Q4124187.6M$1.92B
2023Q3127187.9M$1.40B
2023Q2124181.4M$1.53B
2023Q1115169.9M$1.45B
2022Q4119153.3M$1.01B
2022Q3120170.6M$1.27B
2022Q2115160.0M$922M
Largest reported holders, 2026Q1
HolderShares% of companyValue
BlackRock Inc.37.9M15%$704M
VANGUARD GROUP INC30.5M12%$566M
T. Rowe Price Investment Management, Inc.14.6M6.0%$272M
STATE STREET CORP9.4M3.9%$175M
COOPERMAN LEON G8.4M3.4%$156M
GOLDMAN SACHS GROUP INC7.3M3.0%$137M
FMR LLC6.6M2.7%$122M
GEODE CAPITAL MANAGEMENT LLC5.9M2.4%$110M
MILLENNIUM MANAGEMENT LLC5.1M2.1%$95M
DIMENSIONAL FUND ADVISORS LP4.7M1.9%$87M

SEC Form 13F data sets (DERA bulk files). 13F is quarterly, filed up to 45 days late, and covers long US equity positions only, no shorts, no derivatives, nothing held below the reporting threshold.

reading the register…