- Quarter end
- 31 Dec 2025
- the date the book describes
- Filed
- 27 Oct 2026
- latest of these filings; the earliest 22 Jan 2026
- Managers listing it
- 20
- at least, of 95 tracked, among listed positions
- Comparable managers
- 92
- filed both Q3 2025 and Q4 2025; 6 listed it in both
- Shares listed
- 27,762,497
- combined, among listed positions
- Reported value
- $650m
- combined, at the quarter end
Among the 92 comparable managers: 10 buyers (opened or added shares) and 17 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was -7,442,916.
Managers listing MIR in Q4 2025
20 of 20 holders
Largest increases and reductions, by shares
Increases
- Citadel Advisors LLCexisting position · 1,620,793 shares now+1,430,949
- Davidson Kempner Capital Management LPexisting position · 928,513 shares now+853,513
- Neuberger Berman Group LLCnew position · 567,671 shares now+567,671
- Bridgewater Associates LPnew position · 489,928 shares now+489,928
- Invesco Ltdexisting position · 3,101,120 shares now+344,230
Reductions
- Janus Henderson Group Ltdexisting position · 4,596,949 shares now-3,064,988
- MFS Investment Managementexisting position · 3,663,479 shares now-1,728,293
- Arrowstreet Capital LPexisting position · 1,071,340 shares now-930,518
- Fidelity (FMR LLC)existing position · 8,414,300 shares now-664,001
- D. E. Shaw & Co.existing position · 629,175 shares now-610,386
New positions and exits
New (5)
Exited (8)
- Maverick Capital Ltdwas $60m
- Millennium Management LLCwas $12m
- Susquehanna International Group LLPwas $9.0m
- Two Sigma Investments LPwas $6.9m
- Element Capital Management LLCwas $2.7m
- Freestone Grove Partners LPwas $1.8m
- Jane Street Group LLCwas $1.3m
- Brevan Howard Capital Management LPwas $1.2m
Ownership over time
Tracked managers listing it, at least.
| Quarter | Holders | Reported value | Buyers | Sellers |
|---|---|---|---|---|
| Q4 2021 | 2 | $10m | n.a. | n.a. |
| Q1 2022 | 1 | $3.0m | n.a. | n.a. |
| Q2 2022 | 1 | $2.0m | n.a. | n.a. |
| Q3 2022 | 1 | $88m | n.a. | n.a. |
| Q4 2022 | 1 | $77m | n.a. | n.a. |
| Q1 2023 | 4 | $105m | n.a. | n.a. |
| Q2 2023 | 2 | $84m | n.a. | n.a. |
| Q3 2023 | 2 | $71m | n.a. | n.a. |
| Q4 2023 | 2 | $104m | 1 | 1 |
| Q1 2024 | 3 | $116m | 2 | 1 |
| Q2 2024 | 3 | $103m | 1 | 2 |
| Q3 2024 | 4 | $105m | 2 | 2 |
| Q4 2024 | 7 | $349m | 5 | 2 |
| Q1 2025 | 4 | $291m | 2 | 4 |
| Q2 2025 | 8 | $442m | 4 | 4 |
| Q3 2025 | 9 | $431m | 5 | 5 |
| Q4 2025 | 6 | $241m | 10 | 17 |
| Q1 2026 | 7 | $261m | 14 | 12 |
| Q2 2026 | 8 | $287m | 14 | 12 |
Compare with…
Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.
MIR and GE →MIR and LRCX →MIR and GEV →Choose a stock to compare with MIR →
How much of the picture this is
A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.
Which funds own MIR, latest filings →Back to the 13F Explorer →