MIRION TECHNOLOGIES INC (MIR) Institutional Ownership Changes & 13F Activity
MIRION TECHNOLOGIES INC (MIR). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings (Q2 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Alyeska Investment Group, L.P., Millennium Management Llc, Goldman Sachs Group Inc, Invesco Ltd., and Bamco Inc.
| Institution | Type | Change in shares | Change Position % | Shares | Reported stock balance | Portfolio quarter | Filing date |
|---|---|---|---|---|---|---|---|
| Manufacturers Life Insurance Company, The | Buy | +12,995 | +11.6% | 124,653 | $2.24M | Q2 2026 | Sep 09, 2026 |
| Parkside Financial Bank & Trust | Buy | +5 | +50.0% | 15 | $269.00 | Q2 2026 | Sep 04, 2026 |
| Citadel Advisors Llc | Sell | -1,790,456 | -98.2% | 32,796 | $588.03K | Q2 2026 | Sep 02, 2026 |
| Corient Private Wealth Llc | Sell | -15,550 | -56.6% | 11,931 | $213.92K | Q2 2026 | Aug 27, 2026 |
| California State Teachers Retirement System | Sell | -6,607 | -2.4% | 267,489 | $4.80M | Q2 2026 | Aug 24, 2026 |
| Empowered Funds, Llc | Sell | -725 | -2.7% | 26,225 | $470.21K | Q2 2026 | Aug 17, 2026 |
| Public Employees Retirement System Of Ohio | Buy | +125 | +15.2% | 947 | $16.98K | Q2 2026 | Aug 17, 2026 |
| Alyeska Investment Group, L.P. | Buy | +6,833,375 | +252.9% | 9,534,955 | $170.96M | Q2 2026 | Aug 14, 2026 |
| Millennium Management Llc | Sell | -4,115,060 | -80.6% | 991,741 | $17.78M | Q2 2026 | Aug 14, 2026 |
| Goldman Sachs Group Inc | Buy | +3,056,937 | +41.6% | 10,406,605 | $186.59M | Q2 2026 | Aug 14, 2026 |
| Invesco Ltd. | Buy | +2,769,589 | — | 2,769,589 | $49.66M | Q2 2026 | Aug 14, 2026 |
| Bamco Inc | Buy | +2,692,335 | +221.8% | 3,906,083 | $70.04M | Q2 2026 | Aug 14, 2026 |
| Maverick Capital Ltd | Buy | +2,595,160 | +97.9% | 5,245,039 | $94.04M | Q2 2026 | Aug 14, 2026 |
| Davidson Kempner Capital Management Lp | Buy | +1,619,998 | — | 1,619,998 | $29.05M | Q2 2026 | Aug 14, 2026 |
| Alliancebernstein L.P. | Sell | -1,320,912 | -79.9% | 332,517 | $6.18M | Q2 2026 | Aug 14, 2026 |
| Ameriprise Financial Inc | Buy | +1,002,284 | — | 1,002,284 | $17.97M | Q2 2026 | Aug 14, 2026 |
| Fred Alger Management, Llc | Sell | -753,523 | -82.8% | 156,083 | $2.80M | Q2 2026 | Aug 14, 2026 |
| Exoduspoint Capital Management, Lp | Buy | +605,134 | — | 605,134 | $10.85M | Q2 2026 | Aug 14, 2026 |
| Nissay Asset Management Corp /Japan | Buy | +599,278 | — | 599,278 | $10.75M | Q2 2026 | Aug 14, 2026 |
| Nomura Asset Management International Inc. | Sell | -561,870 | -77.3% | 165,408 | $2.97M | Q2 2026 | Aug 14, 2026 |
| Select Equity Group, L.P. | Buy | +520,555 | +49.3% | 1,576,023 | $28.26M | Q2 2026 | Aug 14, 2026 |
| Ensign Peak Advisors, Inc | Sell | -515,378 | -81.6% | 116,040 | $2.08M | Q2 2026 | Aug 14, 2026 |
| Point72 Asset Management, L.P. | Buy | +503,238 | +288.8% | 677,509 | $12.15M | Q2 2026 | Aug 14, 2026 |
| Osaic Holdings, Inc. | Buy | +485,442 | +262.3% | 670,489 | $12.02M | Q2 2026 | Aug 14, 2026 |
| Sei Investments Co | Buy | +391,116 | +85.3% | 849,475 | $15.23M | Q2 2026 | Aug 14, 2026 |
| Hrt Financial Lp | Buy | +339,916 | — | 339,916 | $6.09M | Q2 2026 | Aug 14, 2026 |
| T. Rowe Price Investment Management, Inc. | Sell | -339,720 | -2.3% | 14,288,075 | $256.19M | Q2 2026 | Aug 14, 2026 |
| Frontier Capital Management Co Llc | Buy | +298,979 | — | 298,979 | $5.36M | Q2 2026 | Aug 14, 2026 |
| Wellington Management Group Llp | Buy | +261,175 | +31.2% | 1,098,987 | $19.70M | Q2 2026 | Aug 14, 2026 |
| Holocene Advisors, Lp | Buy | +252,658 | +297.0% | 337,724 | $6.06M | Q2 2026 | Aug 14, 2026 |
Frequently asked questions about MIR activity
Which institutional owners are buying MIR?
Institutional owners buying MIR include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.
What does "buy" mean in MIR activity?
"Buy" means an investor increased their reported position in MIR compared to the prior reporting period. This reflects growing exposure to MIRION TECHNOLOGIES INC (MIR) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).
Is institutional interest in MIR increasing?
Institutional interest in MIR can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.
Related MIR Institutional Insights
- MIR Overview
- MIR 13F Institutional Holders
- MIR Top Institutional Shareholders
- Industrials Sector Institutional Ownership
- Industrials Sector Portfolio Overlap
- Institutional Portfolio Overlap & Shared Holdings
- Most Bought Industrials Stocks By Institutional Investors
- Most Sold Industrials Stocks By Institutional Investors
- MIR Insider Trading & SEC Form 4 Activity
- MIR Articles
- Top Institutional Investor Stock Rankings