Security record · archived quarter
MIR
Mirion Technologies, Inc. · Industrials · Industrial - Machinery
16Tracked holders
+2Δ holders
59.41MShares held
$1.28BReported value
+3New positions
−1Exits
Momentum inputs (comparable managers):
holder breadth +14.3% ·
share flow -1.8% ·
net new positions +12.5%
— formula
Ownership fragmentation — more holders, smaller aggregate stake
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q2 2025
Ownership over time
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 114 | -1 | 168.27M | $3.02B | +7 | −8 |
| Q1 2026 | 118 | +2 | 167.83M | $3.12B | +9 | −8 |
| Q4 2025 | 115 | +1 | 179.63M | $4.21B | +4 | −2 |
| Q3 2025 | 16 | -3 | 103.12M | $2.40B | — | −3 |
| Q2 2025 | 16 | +2 | 59.41M | $1.28B | +3 | −1 |
| Q1 2025 | 11 | -3 | 18.78M | $272.38M | +1 | −4 |
| Q4 2024 | 14 | +3 | 19.46M | $339.68M | +4 | −1 |
| Q3 2024 | 10 | +3 | 10.67M | $118.13M | +3 | — |
| Q2 2024 | 7 | — | 9.18M | $98.62M | — | — |
Who holds it · Q2 2025
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | The Vanguard Group ✦ (passive) | 23.77M | — | $511.69M | 0.0% | n/c | 1 | SEC ↗ |
| 2 | The Vanguard Group ✦ (passive) | 23.77M | — | $511.69M | 0.0% | n/c | 1 | SEC ↗ |
| 3 | The Vanguard Group ✦ (passive) | 23.77M | — | $511.69M | 0.0% | n/c | 1 | SEC ↗ |
| 4 | The Vanguard Group ✦ (passive) | 23.77M | — | $511.69M | 0.0% | n/c | 1 | SEC ↗ |
| 5 | The Vanguard Group ✦ (passive) | 23.77M | — | $511.69M | 0.0% | n/c | 1 | SEC ↗ |
| 6 | BlackRock ✦ (passive) | 17.01M | — | $366.28M | 0.0% | n/c | 1 | SEC ↗ |
| 7 | BlackRock ✦ (passive) | 17.01M | — | $366.28M | 0.0% | n/c | 1 | SEC ↗ |
| 8 | BlackRock ✦ (passive) | 17.01M | — | $366.28M | 0.0% | n/c | 1 | SEC ↗ |
| 9 | BlackRock ✦ (passive) | 17.01M | — | $366.28M | 0.0% | n/c | 1 | SEC ↗ |
| 10 | BlackRock ✦ (passive) | 17.01M | — | $366.28M | 0.0% | n/c | 1 | SEC ↗ |
| 11 | BlackRock ✦ (passive) | 17.01M | — | $366.28M | 0.0% | n/c | 1 | SEC ↗ |
| 12 | BlackRock ✦ (passive) | 17.01M | — | $366.28M | 0.0% | n/c | 1 | SEC ↗ |
| 13 | BlackRock ✦ (passive) | 17.01M | — | $366.28M | 0.0% | n/c | 1 | SEC ↗ |
| 14 | BlackRock ✦ (passive) | 17.01M | — | $366.28M | 0.0% | n/c | 1 | SEC ↗ |
| 15 | BlackRock ✦ (passive) | 17.01M | — | $366.28M | 0.0% | n/c | 1 | SEC ↗ |
| 16 | BlackRock ✦ (passive) | 17.01M | — | $366.28M | 0.0% | n/c | 1 | SEC ↗ |
| 17 | BlackRock ✦ (passive) | 17.01M | — | $366.28M | 0.0% | n/c | 1 | SEC ↗ |
| 18 | BlackRock ✦ (passive) | 17.01M | — | $366.28M | 0.0% | n/c | 1 | SEC ↗ |
| 19 | BlackRock ✦ (passive) | 17.01M | — | $366.28M | 0.0% | n/c | 1 | SEC ↗ |
| 20 | State Street Global Advisors ✦ (passive) | 5.09M | -0.9% | $109.68M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 21 | Geode Capital Management ✦ (passive) | 4.74M | 0.0% | $102.05M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 22 | Geode Capital Management ✦ (passive) | 4.74M | 0.0% | $102.05M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 23 | Millennium Management ✦ | 2.88M | +12.2% | $62.05M | 0.1% | ▲ Add | 5 | SEC ↗ |
| 24 | Arrowstreet Capital ✦ | 2.28M | -18.2% | $49.11M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 25 | D. E. Shaw & Co. ✦ | 967.46K | +114.2% | $20.83M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 26 | D. E. Shaw & Co. ✦ | 967.46K | +114.2% | $20.83M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 27 | Fidelity (FMR) ✦ | 947.00K | — | $20.39M | 0.0% | n/c | 1 | SEC ↗ |
| 28 | Fidelity (FMR) ✦ | 947.00K | — | $20.39M | 0.0% | n/c | 1 | SEC ↗ |
| 29 | GAMCO Investors ✦ | 562.07K | -5.1% | $12.10M | 0.1% | ▼ Trim | 5 | SEC ↗ |
| 30 | Citadel Advisors ✦ | 451.47K | -50.4% | $9.72M | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 31 | AQR Capital Management ✦ | 312.26K | +56.8% | $6.72M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 32 | AQR Capital Management ✦ | 312.26K | +56.8% | $6.72M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 33 | AQR Capital Management ✦ | 312.26K | +56.8% | $6.72M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 34 | AQR Capital Management ✦ | 312.26K | +56.8% | $6.72M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 35 | AQR Capital Management ✦ | 312.26K | +56.8% | $6.72M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 36 | T. Rowe Price ✦ | 169.15K | +12.7% | $3.64M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 37 | Renaissance Technologies ✦ | 115.90K | -82.0% | $2.50M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 38 | Soros Fund Management ✦ | 71.70K | New | $1.54M | 0.0% | New | 1 | SEC ↗ |
| 39 | Two Sigma Investments ✦ | 28.65K | New | $616,835 | 0.0% | New | 1 | SEC ↗ |
| 40 | Gotham Asset Management ✦ | 13.60K | New | $292,873 | 0.0% | New | 1 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Soros Fund Management | $1.54M | 0.0% |
| Two Sigma Investments | $616,835 | 0.0% |
| Gotham Asset Management | $292,873 | 0.0% |
Exited
| Norges Bank | $8.74M | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 358 holders, 250.83M shares, $4.35B reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
Frequently co-owned
What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.
Provenance: Ownership from parsed 13F common-stock positions (tracked universe, comparable sets for changes); insider rows from Forms 3/4/5; stakes from Schedules 13D/13G; every filing links to its original on SEC EDGAR.
Reporting period: Q2 2025 ·
Methodology ·
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