MIR Institutional Ownership
Who owns Mirion Technologies, Inc. and what the big funds did with it last quarter, from every SEC 13F filing. 355 funds reported holding MIR at Jun 30, 2026.
- ●193 buying vs 184 selling
- ▲Shares held by funds +3.4%
- ▼Funds holding -11
- ●Superinvestors: 2 added, 2 cut
- ▲Put/call 0.31 to 0.16
What the filings show, not a forecast. Positions can be up to 45 days old and leave out short sales.
Funds holding and ownership
8 quartersQuarter over quarter
all 13F filers| Q2 2026 | This quarter | Q1 2026 | Change |
|---|---|---|---|
| Funds holding | 355 | 366 | −3.0% |
| In funds' top 10 | 5 | 6 | −16.7% |
| 13F shares | 262M | 254M | +3.4% |
| Held by funds | – | – | – |
| New positions | 56 | 56 | 0.0% |
| Increased | 137 | 137 | 0.0% |
| Reduced | 118 | 130 | −9.2% |
| Sold out | 66 | 58 | +13.8% |
| Calls (shares) | 2.7M | 1.5M | +75.7% |
| Puts (shares) | 417K | 477K | −12.6% |
| Put/call ratio | 0.16 | 0.31 | −50.2% |
Buyers vs sellers
adding or new vs cutting or sold outSuperinvestors in MIR
All superinvestors →
Who owns MIR
share of fund held shares- Index and passive funds37.6%
- Active managers and hedge funds48.2%
- Banks and brokers13.2%
- Pensions, insurers and other1.0%
The top 10 holders own 50.9% of all MIR shares that funds reported. Groups are our own grouping of filers by name.
Put/call ratio
funds' options, market makers left outAbove 1 means funds hold more puts than calls, a sign of hedging or bets on a fall. Options are valued at the underlying shares.
Filed so far for Q3 2026
89 funds changed their position- Congress Asset Management CoTrimmed−651K sh
- Robeco Schweiz AGSold out−424K sh
- Zevenbergen Capital Investments LLCSold out−400K sh
- Swedbank ABTrimmed−429K sh
- Tema Etfs LLCSold out−226K sh
🔒 Free account: see all 20.
Top holders
Q2 2026| # | Fund | Of company | Shares | Value | Change |
|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | – | 38.3M | $686M | +405K |
| 2 | Vanguard Portfolio Management LLC | – | 18.2M | $326M | +274K |
| 3 | T. Rowe Price Investment Management, Inc. | – | 14.3M | $256M | −340K |
| 4 | Vanguard Capital Management LLC | – | 10.6M | $190M | +109K |
| 5 | Goldman Sachs Group Inc | – | 10.4M | $187M | +3.1M |
| 6 | State Street Corp | – | 9.9M | $178M | +494K |
| 7 | Alyeska Investment Group, L.P. | – | 9.5M | $171M | +6.8M |
| 8 | Cooperman Leon G | – | 8.4M | $150M | 0 |
| 9 | Fmr LLC | – | 7.3M | $131M | +778K |
| 10 | Congress Asset Management Co | – | 6.7M | $120M | +5.6M |
- Alyeska Investment Group, L.P.+6.8M sh+$123M
- Congress Asset Management Co+5.6M sh+$99.9M
- Goldman Sachs Group Inc+3.1M sh+$54.8M
- Bamco Inc /ny/+2.7M sh+$48.3M
- Maverick Capital Ltd+2.6M sh+$46.5M
- Neuberger Berman Group LLC+2.3M sh+$42M
- Morgan Stanley+1.6M sh+$28.9M
- Royal London Asset Management Ltd+1.2M sh+$21.1M
- Millennium Management LLC−4.1M sh−$73.8M
- Bank of New York Mellon Corp−3.2M sh−$56.6M
- Two Creeks Capital Management, LP−2.4M sh−$45.5M
- Citadel Advisors LLC−1.8M sh−$32.1M
- Alliancebernstein L.P.−1.3M sh−$24.6M
- Brown Advisory Inc−1.3M sh−$24.2M
- Daiwa Securities Group Inc.−1.2M sh−$22.6M
- Franklin Resources Inc−1.1M sh−$19.9M
MIR institutional ownership FAQ
Who owns the most MIR stock?
In Q2 2026 13F filings the largest holder of MIR was BlackRock, Inc., followed by Vanguard Portfolio Management LLC and T. Rowe Price Investment Management, Inc.. Index fund managers are usually the biggest holders of large companies.
What percentage of MIR is owned by institutions?
355 funds reported holding 262M MIR shares at Jun 30, 2026.
Are hedge funds buying MIR?
In Q2 2026, 193 funds bought MIR (56 of them new positions) and 184 sold (66 sold out completely). Among well known investors, 2 added and 2 cut. Our fund sentiment for MIR is neutral.
What is MIR's institutional put/call ratio?
Funds reported $7.5M of MIR puts against $48M of calls, a put/call ratio of 0.16 (0.31 the quarter before). Market makers and bank trading desks are left out, since their options are mostly hedges.
How current is this MIR ownership data?
13F filings show holdings at the end of each quarter and are due within 45 days, so positions can be up to six weeks old when they appear. We add each new filing within minutes, and the "filed so far" list shows funds that have already reported the next quarter.
For informational and educational purposes only. Not investment advice, and not a recommendation to buy or sell any security. Fund sentiment summarises what 13F filings show and is not a forecast. Holdings come from SEC Form 13F filings as reported and show positions at the end of the quarter, up to 45 days before the filing. A 13F leaves out short positions, cash, bonds and most foreign holdings. See all hedge fund holdings.