Mirion Technologies, Inc.
DE ˙ DB
15,28 € ↑0,11 (0,72%)
2026-06-04
DEL PRIS
SecurityDE:55I0 / Mirion Technologies, Inc.
InstitutionMorgan Stanley
Latest Disclosed Ownership2,285,068 shares
Latest Disclosed Value $ 42,479,436
Morgan Stanley reports 8.98% increase in ownership of 55I0 / Mirion Technologies, Inc.

On May 15, 2026 - Morgan Stanley filed a 13F-HR form disclosing ownership of 2,285,068 shares of Mirion Technologies, Inc. (DE:55I0) valued at $33,819,006 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on May 27, 2026 disclosing 2,096,858 shares of Mirion Technologies, Inc.. This represents a change in shares of 8.98% during the quarter. The current value of the position is $34,927,264 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

Upgrade to unlock premium data and export to Excel .

Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F MIRION TECHNOLOGIES COM CL A 60471A101 2,285,068 188,210 8.98 42,479 -13.50 0.0026
2026-05-27 2025-12-31 13F/A-1 MIRION TECHNOLOGIES COM CL A 60471A101 2,096,858 782,951 59.59 49,108 60.69 0.0029
2026-02-13 2025-12-31 13F MIRION TECHNOLOGIES COM CL A 60471A101 2,096,858 782,951 49,108 0.0029
2026-05-27 2025-09-30 13F/A-1 MIRION TECHNOLOGIES COM CL A 60471A101 1,313,907 -160,803 -10.90 30,561 -3.74 0.0019
2025-11-14 2025-09-30 13F MIRION TECHNOLOGIES COM CL A 60471A101 1,313,907 -160,803 30,561 0.0019
2025-08-15 2025-06-30 13F MIRION TECHNOLOGIES COM CL A 60471A101 1,474,710 252,633 20.67 31,751 79.18 0.0021
2025-05-15 2025-03-31 13F MIRION TECHNOLOGIES COM CL A 60471A101 1,222,077 173,257 16.52 17,720 -3.17 0.0013
2025-05-15 2024-12-31 13F/A-1 MIRION TECHNOLOGIES COM CL A 60471A101 1,048,820 179,618 20.66 18,302 90.20 0.0013
2025-02-14 2024-12-31 13F MIRION TECHNOLOGIES COM CL A 60471A101 1,048,820 179,618 18,302 0.0013
2025-05-14 2024-09-30 13F/A-2 MIRION TECHNOLOGIES COM CL A 60471A101 869,202 284,556 48.67 9,622 53.24 0.0007
2025-02-14 2024-09-30 13F/A-1 MIRION TECHNOLOGIES COM CL A 60471A101 869,202 284,556 9,622 0.0007
2024-11-14 2024-09-30 13F MIRION TECHNOLOGIES COM CL A 60471A101 869,202 284,556 9,622 0.0001
2025-05-14 2024-06-30 13F/A-2 MIRION TECHNOLOGIES COM CL A 60471A101 584,646 -427,196 -42.22 6,279 -45.42 0.0005
2024-10-17 2024-06-30 13F/A-1 MIRION TECHNOLOGIES COM CL A 60471A101 584,646 -427,196 6,279 0.0005
2024-08-14 2024-06-30 13F MIRION TECHNOLOGIES COM CL A 60471A101 584,646 -427,196 6,279 0.0005
2024-10-17 2024-03-31 13F/A-2 MIRION TECHNOLOGIES COM CL A 60471A101 1,011,842 -583,027 -36.56 11,505 -29.63 0.0009
2024-08-16 2024-03-31 13F/A-1 MIRION TECHNOLOGIES COM CL A 60471A101 1,011,842 -583,027 11,505 0.0001
2024-05-15 2024-03-31 13F MIRION TECHNOLOGIES COM CL A 60471A101 1,011,842 -583,027 11,505 0.0009
2024-08-16 2023-12-31 13F/A-1 MIRION TECHNOLOGIES COM CL A 60471A101 1,594,869 -50,141 -3.05 16,347 33.03 0.0014
2024-02-13 2023-12-31 13F MIRION TECHNOLOGIES COM CL A 60471A101 1,594,869 -50,141 16,347 0.0014
2023-11-15 2023-09-30 13F MIRION TECHNOLOGIES COM CL A 60471A101 1,645,010 180,721 12.34 12,288 -0.69 0.0012
2023-08-14 2023-06-30 13F MIRION TECHNOLOGIES COM CL A 60471A101 1,464,289 314,033 27.30 12,373 25.96 0.0012
2023-05-15 2023-03-31 13F MIRION TECHNOLOGIES COM CL A 60471A101 1,150,256 11,864 1.04 9,823 30.56 0.0011
2023-02-14 2022-12-31 13F MIRION TECHNOLOGIES COM CL A 60471A101 1,138,392 -645,172 -36.17 7,525 -43.53 0.0009
2022-11-14 2022-09-30 13F MIRION TECHNOLOGIES COM CL A 60471A101 1,783,564 86,936 5.12 13,325 36.36 0.0018
2022-10-27 2022-06-30 13F/A-1 MIRION TECHNOLOGIES COM CL A 60471A101 1,696,628 -117,046 -6.45 9,772 -33.24 0.0013
2022-08-15 2022-06-30 13F MIRION TECHNOLOGIES COM CL A 60471A101 1,696,628 -117,046 9,772 0.0003
2022-10-27 2022-03-31 13F/A-1 MIRION TECHNOLOGIES COM CL A 60471A101 1,813,674 107,716 6.31 14,637 -18.05 0.0020
2022-05-13 2022-03-31 13F MIRION TECHNOLOGIES COM CL A 60471A101 1,813,674 107,716 14,637 0.0020
2022-02-14 2021-12-31 13F MIRION TECHNOLOGIES COM CL A 60471A101 1,705,958 1,705,958 17,861 0.0022
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.