- Quarter end
- 30 Jun 2025
- the date the book describes
- Filed
- 14 Aug 2025
- latest of these filings; the earliest 8 Aug 2025
- Managers listing it
- 8
- at least, of 95 tracked, among listed positions
- Comparable managers
- 95
- filed both Q1 2025 and Q2 2025; 4 listed it in both
- Shares listed
- 20,509,699
- combined, among listed positions
- Reported value
- $442m
- combined, at the quarter end
Among the 95 comparable managers: 4 buyers (opened or added shares) and 4 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +484,290.
Managers listing MIR in Q2 2025
8 of 8 holders
| Action | Filing | |||||
|---|---|---|---|---|---|---|
| Janus Henderson Group Ltd | 7,988,396 | $172m | 0.08% | Trimmed | -599,268 | 14 Aug 2025 (the filing on sec.gov) |
| Maverick Capital Ltd | 5,308,038 | $114m | 1.72% | Trimmed | -2,748,071 | 14 Aug 2025 (the filing on sec.gov) |
| MFS Investment Management | 3,833,668 | $83m | under 0.1% | New | new | 8 Aug 2025 (the filing on sec.gov) |
| Arrowstreet Capital LP | 2,281,180 | $49m | under 0.1% | Trimmed | -508,329 | 13 Aug 2025 (the filing on sec.gov) |
| GAMCO Investors Inc | 562,074 | $12m | 0.12% | Trimmed | -30,053 | 13 Aug 2025 (the filing on sec.gov) |
| Moore Capital Management LP | 407,413 | $8.8m | 0.11% | New | new | 14 Aug 2025 (the filing on sec.gov) |
| Soros Fund Management LLC | 71,700 | $1.5m | under 0.1% | New | new | 14 Aug 2025 (the filing on sec.gov) |
| Polen Capital Management LLC | 57,230 | $1.2m | under 0.1% | New | new | 13 Aug 2025 (the filing on sec.gov) |
Largest increases and reductions, by shares
Increases
- MFS Investment Managementnew position · 3,833,668 shares now+3,833,668
- Moore Capital Management LPnew position · 407,413 shares now+407,413
- Soros Fund Management LLCnew position · 71,700 shares now+71,700
- Polen Capital Management LLCnew position · 57,230 shares now+57,230
Reductions
- Maverick Capital Ltdexisting position · 5,308,038 shares now-2,748,071
- Janus Henderson Group Ltdexisting position · 7,988,396 shares now-599,268
- Arrowstreet Capital LPexisting position · 2,281,180 shares now-508,329
- GAMCO Investors Incexisting position · 562,074 shares now-30,053
New positions and exits
New (4)
Exited (0)
No exit shown by a manager’s own filing.
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 →