Mirion Technologies, Inc.
DE ˙ DB
15,18 € ↓ -0,11 (-0,72%)
2026-06-05
DEL PRIS
SecurityDE:55I0 / Mirion Technologies, Inc.
InstitutionGabelli Funds Llc
Latest Disclosed Ownership367,980 shares
Latest Disclosed Value $ 6,840,748
Gabelli Funds Llc reports 14.47% decrease in ownership of 55I0 / Mirion Technologies, Inc.

On May 14, 2026 - Gabelli Funds Llc filed a 13F-HR form disclosing ownership of 367,980 shares of Mirion Technologies, Inc. (DE:55I0) valued at $5,446,104 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 430,250 shares of Mirion Technologies, Inc.. This represents a change in shares of -14.47% during the quarter. The current value of the position is $5,584,096 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.

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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)
2026-05-14 2026-03-31 13F MIRION TECHNOLOGIES EQUITY 60471A101 367,980 -62,270 -14.47 6,841 -32.12 0.0462
2026-02-05 2025-12-31 13F MIRION TECHNOLOGIES EQUITY 60471A101 430,250 -51,000 -10.60 10,076 -9.98 0.0682
2025-11-12 2025-09-30 13F MIRION TECHNOLOGIES EQUITY 60471A101 481,250 -30,064 -5.88 11,194 1.68 0.0758
2025-08-13 2025-06-30 13F MIRION TECHNOLOGIES EQUITY 60471A101 511,314 -12,936 -2.47 11,009 44.82 0.0782
2025-05-14 2025-03-31 13F MIRION TECHNOLOGIES EQUITY 60471A101 524,250 -32,438 -5.83 7,602 -21.75 0.0579
2025-02-13 2024-12-31 13F MIRION TECHNOLOGIES EQUITY 60471A101 556,688 -60,000 -9.73 9,714 42.31 0.0730
2024-11-13 2024-09-30 13F MIRION TECHNOLOGIES EQUITY 60471A101 616,688 -45,000 -6.80 6,827 -3.94 0.0492
2024-08-13 2024-06-30 13F MIRION TECHNOLOGIES EQUITY 60471A101 661,688 -44,352 -6.28 7,107 -11.47 0.0540
2024-05-14 2024-03-31 13F MIRION TECHNOLOGIES EQUITY 60471A101 706,040 -10,000 -1.40 8,028 9.37 0.0591
2024-02-13 2023-12-31 13F MIRION TECHNOLOGIES EQUITY 60471A101 716,040 -11,960 -1.64 7,339 34.96 0.0565
2023-11-08 2023-09-30 13F MIRION TECHNOLOGIES EQUITY 60471A101 728,000 6,000 0.83 5,438 -10.85 0.0441
2023-08-10 2023-06-30 13F MIRION TECHNOLOGIES EQUITY 60471A101 722,000 5,000 0.70 6,101 -0.38 0.0462
2023-05-12 2023-03-31 13F MIRION TECHNOLOGIES EQUITY 60471A101 717,000 12,000 1.70 6,123 31.39 0.0464
2023-02-13 2022-12-31 13F MIRION TECHNOLOGIES EQUITY 60471A101 705,000 -65,000 -8.44 4,660 -18.98 0.0362
2022-11-14 2022-09-30 13F/A-1 MIRION TECHNOLOGIES COM 60471A101 770,000 157,000 25.61 5,752 62.90 0.0474
2022-11-10 2022-09-30 13F MIRION TECHNOLOGIES COM 60471A101 770,000 157,000 5,752 0.0474
2022-08-12 2022-06-30 13F MIRION TECHNOLOGIES COM 60471A101 613,000 8,312 1.37 3,531 -27.64 0.0271
2022-05-18 2022-03-31 13F/A-1 MIRION TECHNOLOGIES COM 60471A101 604,688 51,122 9.24 4,880 -15.80 0.0321
2022-02-11 2021-12-31 13F MIRION TECHNOLOGIES COM 60471A101 553,566 553,566 5,796 0.0366
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.