MIRMirion Technologies, Inc.

CSNew York Stock Exchange (XNYS)·USD

Identity

Security key: 18575
Ticker: MIR
Type: CS — Common Stock
Exchange: New York Stock Exchange(XNYS)
Venue group: NYSE
Operating MIC: XNYS
Market: stocks
Locale: us
Currency: USD
Listed: 2020-08-20
Round lot: 100
Active: Yes
Last seen in a load: 2026-08-14 20:49
Vendor updated: 2026-08-13 06:09
Ticker root / suffix: MIR

Detail

Enriched 2026-08-14 20:47

Market cap: $3,787,862,610.87
Shares outstanding (class): 243,278,092
Shares outstanding (weighted): 249,037,647
SIC: 3829 MEASURING & CONTROLLING DEVICES, NEC
Employees: 3,281
Location: ATLANTA, GA
Homepage: https://www.mirion.com
Description: Mirion Technologies Inc provides products, services, and software that allow customers to safely leverage the power of ionizing radiation for applications that benefit the health, safety, vitality, and technological progress of the human experience. The Company manages its operations through two segments: Nuclear & Safety and Medical. The Medical segment improves the quality and safety of cancer care delivery and supports applications across medical diagnostics and practitioner safety. The Nuclear & Safety segment powers advancements in nuclear energy and critical radiation safety, measurement and analysis applications across laboratories, research and other industrial markets such as defense.

Market cap and share counts drift.

Funds holding this security

204 funds · 208 positions · $1.56B reported value, as of 2026-03-31

All holders →

Fund	Ticker	Position value	% of fund	Balance	Match
iShares Core S&P Small-Cap ETF iShares Trust	IJR	$273.14M	0.30%	14,692,765 NS	FIGI
VANGUARD TOTAL STOCK MARKET INDEX FUND VANGUARD INDEX FUNDS	VTI	$136.51M	0.01%	7,342,940 NS	FIGI
iShares Russell 2000 ETF iShares Trust	IWM	$108.98M	0.15%	5,862,126 NS	FIGI
VANGUARD SMALL-CAP INDEX FUND VANGUARD INDEX FUNDS	VB	$99.63M	0.06%	5,359,264 NS	FIGI
T. Rowe Price Small-Cap Stock Fund, Inc. T. ROWE PRICE SMALL-CAP STOCK FUND, INC.	—	$85.33M	1.06%	4,590,117 NS	FIGI
VANGUARD SMALL-CAP VALUE INDEX FUND VANGUARD INDEX FUNDS	VBR	$63.44M	0.10%	3,412,847 NS	FIGI
Janus Henderson Triton Fund JANUS INVESTMENT FUND	—	$51.23M	0.99%	2,755,798 NS	FIGI
VANGUARD EXTENDED MARKET INDEX FUND VANGUARD INDEX FUNDS	VXF	$50.78M	0.06%	2,731,760 NS	FIGI
T. Rowe Price Institutional Small-Cap Stock Fund T. Rowe Price Equity Funds, Inc.	—	$46.14M	1.07%	2,482,167 NS	FIGI
State Street(R) SPDR(R) Portfolio S&P 600(TM) S… SPDR SERIES TRUST	SPSM	$41.18M	0.30%	2,215,306 NS	FIGI
T. Rowe Price Small-Cap Value Fund, Inc. T. ROWE PRICE SMALL-CAP VALUE FUND, INC.	—	$40.79M	0.44%	2,194,326 NS	FIGI
iShares S&P Small-Cap 600 Growth ETF iShares Trust	IJT	$39.24M	0.60%	2,110,886 NS	FIGI
iShares Russell 2000 Growth ETF iShares Trust	IWO	$36.33M	0.30%	1,954,518 NS	FIGI
VANGUARD TAX-MANAGED SMALL-CAP FUND VANGUARD TAX-MANAGED FUNDS	—	$27.85M	0.29%	1,498,059 NS	FIGI
State Street(R) SPDR(R) S & P 600(TM) Small Cap… SPDR SERIES TRUST	SLYG	$23.99M	0.60%	1,290,641 NS	FIGI

How positions resolve to the securities master. FIGI_COMPOSITE is exact identifier equality — both sides got the FIGI from Bloomberg. TICKER is a narrow fallback used only where the master row carries no FIGI at all (2,389 rows do not, disproportionately Irish-domiciled US listings like LIN and ACN). Roughly 22% of all positions resolve to the master.

Funds holding this security

Identifiers

master.security_identifier

TICKERMIR
FIGI_COMPOSITEBBG00VHJ1K96
FIGI_SHARE_CLASSBBG00VHJ1KB3
CIK0001809987
ISINUS60471A1016
Resolved through OpenFIGI from a holdings ISIN, not supplied by the securities vendor.

Identifiers

Classification

classification.v_security_classification

Asset class: Equity
Sector: Information Technology
Industry: Electronic Equipment
Source: LLMunreviewed
Self-reported confidence: 0.9
Model: deepseek
Rationale: Mirion Technologies designs and manufactures radiation detection and measurement instruments, which aligns with electronic equipment in the technology sector.

Classifications are unreviewed model output. All 5,771 assignments carry source = LLM and is_reviewed = false. Confidence is the model’s own estimate and is not calibrated — it clustered at 0.90–0.98 across the whole first pass, including rows that later proved wrong. Use it to order a review queue, not as a probability. Two share classes of one issuer can disagree.

Classification

Fund data

Not linked to a fund series.

Either this is not a fund, or it is one the SEC share-class snapshot cannot reach — commodity trusts and notes have no series ID at all.