# MIRION TECHNOLOGIES INC COM CL A

MIRION TECHNOLOGIES INC COM CL A is a security (CUSIP 60471A101) tracked across SEC portfolio filings. 365 institutional managers reported $4.5B on Form 13F as of 2026-06-30; 48 registered fund positions totaling $362.3M via N-PORT as of 2026-05-31.

## Summary

- Issuer: MIRION TECHNOLOGIES INC
- Class: COM CL A
- CUSIP: 60471A101
- Asset category: EC
- 13F holders: 365
- 13F value: $4.5B
- 13F period: 2026-06-30
- N-PORT fund positions: 48
- N-PORT value: $362.3M
- N-PORT report: 2026-05-31

## Top institutional holders (Form 13F)

_Showing 15 of 365 managers by value._

| Manager | Location | Value | Shares |
| --- | --- | --- | --- |
| [VANGUARD GROUP INC](https://search.stillhousedata.com/firm/105958) | Valley Forge, PA | $710.7M | 30,346,328 |
| BlackRock, Inc. | New York, NY | $703.8M | 37,857,697 |
| STATE STREET CORP | BOSTON, MA | $175.3M | 9,430,017 |
| COOPERMAN LEON G | BOCA RATON, FL | $155.8M | 8,383,441 |
| GOLDMAN SACHS GROUP INC | NEW YORK, NY | $136.6M | 7,349,668 |
| FMR LLC | BOSTON, MA | $121.8M | 6,551,692 |
| CONGRESS ASSET MANAGEMENT CO /MA | BOSTON, MA | $119.9M | 6,685,434 |
| [GEODE CAPITAL MANAGEMENT, LLC](https://search.stillhousedata.com/firm/115504) | BOSTON, MA | $110.4M | 5,940,175 |
| MILLENNIUM MANAGEMENT LLC | NEW YORK, NY | $100.8M | 5,106,801 |
| DIMENSIONAL FUND ADVISORS LP | AUSTIN, TX | $87.2M | 4,694,288 |
| JANUS HENDERSON GROUP PLC | LONDON, X0 | $75.2M | 4,043,089 |
| UBS Group AG | Zurich, V8 | $70.0M | 3,766,842 |
| AMERICAN CENTURY COMPANIES INC | KANSAS CITY, MO | $50.8M | 2,732,762 |
| [Alyeska Investment Group, L.P.](https://search.stillhousedata.com/firm/155058) | CHICAGO, IL | $50.2M | 2,701,580 |
| LOOMIS SAYLES & CO L P | BOSTON, MA | $49.6M | 2,670,228 |

## Top fund holders (N-PORT)

_Showing 15 of 48 fund positions by value._

| Fund | Registrant | Value | % of fund |
| --- | --- | --- | --- |
| [T. Rowe Price Small-Cap Stock Fund, Inc.](https://search.stillhousedata.com/fund/S000002120) | T. ROWE PRICE SMALL-CAP STOCK FUND, INC. | $85.3M | 105.73% |
| [VANGUARD EXTENDED MARKET INDEX FUND](https://search.stillhousedata.com/fund/S000002841) | VANGUARD INDEX FUNDS | $50.8M | 6.23% |
| [T. Rowe Price Institutional Small-Cap Stock Fund](https://search.stillhousedata.com/fund/S000002094) | T. Rowe Price Equity Funds, Inc. | $46.1M | 106.50% |
| [T. Rowe Price Small-Cap Value Fund, Inc.](https://search.stillhousedata.com/fund/S000002121) | T. ROWE PRICE SMALL-CAP VALUE FUND, INC. | $40.8M | 44.24% |
| [VANGUARD RUSSELL 2000 INDEX FUND](https://search.stillhousedata.com/fund/S000030003) | VANGUARD SCOTTSDALE FUNDS | $22.5M | 12.85% |
| [Meridian Contrarian Fund](https://search.stillhousedata.com/fund/S000001463) | Meridian Fund Inc | $17.1M | 290.76% |
| [VANGUARD EXPLORER FUND](https://search.stillhousedata.com/fund/S000002578) | VANGUARD EXPLORER FUND | $13.2M | 6.08% |
| [ALGER FOCUS EQUITY FUND](https://search.stillhousedata.com/fund/S000009201) | ALGER INSTITUTIONAL FUNDS | $12.3M | 20.18% |
| [Emerald Growth Fund](https://search.stillhousedata.com/fund/S000036390) | FINANCIAL INVESTORS TRUST | $10.5M | 74.73% |
| [MFS New Discovery Value Fund](https://search.stillhousedata.com/fund/S000032712) | MFS SERIES TRUST XIII | $9.6M | 38.61% |
| [The Gabelli Asset Fund](https://search.stillhousedata.com/fund/S000001087) | Gabelli Asset Fund | $8.3M | 52.89% |
| [Master Small Cap Index Series](https://search.stillhousedata.com/fund/S000002716) | Quantitative Master Series LLC | $7.2M | 15.00% |
| [U.S. MICRO CAP PORTFOLIO](https://search.stillhousedata.com/fund/S000000948) | DFA INVESTMENT DIMENSIONS GROUP INC | $4.6M | 6.12% |
| Gabelli Equity Trust Inc | Gabelli Equity Trust Inc | $4.3M | 24.89% |
| ROYCE SMALL-CAP TRUST, INC. | ROYCE SMALL-CAP TRUST, INC. | $4.2M | 18.99% |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/60471a101.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

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Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.