Ticker · CUSIP 60471A101
Holders (tracked)
16
Combined shares
14,554,695
Combined value
$321.35M
Last close
$19.27
Quarter
2025Q4
Tracked holders · last 8 quarters
+3 vs previous quarter over the last 8.
Price is -12.7% vs the avg quarter-end implied price across tracked holders.
SEC event timeline
24 events
- Ron Baron (Baron Capital / BAMCO) added2026-02-17+150,000 shares · 2025Q4Position
- AQR Capital Management trimmed2026-02-17−14,619 shares · 2025Q4Position
- D.E. Shaw & Co. trimmed2026-02-17−610,386 shares · 2025Q4Position
- Two Sigma Investments exited2026-02-17−298,500 shares · 2025Q4Position
- Izzy Englander (Millennium Mgmt) exited2026-02-17−521,021 shares · 2025Q4Position
- Steve Cohen (Point72) opened position2026-02-17+20,900 shares · 2025Q4Position
- Wellington Management opened position2026-02-17+248,775 shares · 2025Q4Position
- +14,300 shares · 2025Q4Position
- Ken Griffin (Citadel Advisors) added2026-02-17+1,430,949 shares · 2025Q4Position
- +489,928 shares · 2025Q4Position
- Lee Ainslie (Maverick Capital) exited2026-02-13−2,588,579 shares · 2025Q4Position
- Norges Bank (Norway SWF) opened position2026-02-10+92,105 shares · 2025Q4Position
- Mario Gabelli (GAMCO) added2026-02-05+15,310 shares · 2025Q4Position
- Two Sigma Investments added2025-11-14+269,850 shares · 2025Q3Position
- D.E. Shaw & Co. added2025-11-14+272,106 shares · 2025Q3Position
- Lee Ainslie (Maverick Capital) trimmed2025-11-14−2,719,459 shares · 2025Q3Position
- T. Rowe Price added2025-11-14+665,185 shares · 2025Q3Position
- +1,258,441 shares · 2025Q3Position
- George Soros (Soros Fund Mgmt) exited2025-11-14−71,700 shares · 2025Q3Position
- AQR Capital Management trimmed2025-11-14−19,922 shares · 2025Q3Position
- Izzy Englander (Millennium Mgmt) trimmed2025-11-14−2,360,926 shares · 2025Q3Position
- +500,000 shares · 2025Q3Position
- Renaissance Technologies exited2025-11-13−115,900 shares · 2025Q3Position
- Mario Gabelli (GAMCO) trimmed2025-11-12−35,455 shares · 2025Q3Position
Insider activity
No insider transactions in the last 30 days.
Follow-the-investor returns
If you'd copied each holder of MIR…
Cost basis inferred from each manager's quarter-over-quarter position changes. Sorted by % return on the position they're still holding.
| Investor | First in | Cost basis | Return | Position value today |
|---|---|---|---|---|
| T. Rowe Price | 2022Q2 | $0.11 | +17301.4% | $16.1M |
| Mario Gabelli (GAMCO) | 2021Q4 | $8.18 | +135.5% | $10.4M |
| Paul Tudor Jones (Tudor Investment) | 2021Q3 | $17.25 | +11.7% | $276K |
| AQR Capital Management | 2024Q4 | $17.88 | +7.7% | $5.4M |
| Ron Baron (Baron Capital / BAMCO) | 2021Q4 | $20.35 | -5.3% | $12.5M |
| Ray Dalio (Bridgewater Associates) | 2024Q4 | $20.45 | -5.8% | $9.4M |
| D.E. Shaw & Co. | 2022Q2 | $22.59 | -14.7% | $12.1M |
| D.E. Shaw & Co. | 2022Q2 | $22.59 | -14.7% | $12.1M |
| Ken Griffin (Citadel Advisors) | 2021Q4 | $23.25 | -17.1% | $1.4M |
| Ken Griffin (Citadel Advisors) | 2021Q4 | $23.25 | -17.1% | $1.4M |
| Ken Griffin (Citadel Advisors) | 2021Q4 | $23.25 | -17.1% | $1.4M |
| Norges Bank (Norway SWF) | 2025Q4 | $23.42 | -17.7% | $1.8M |
| Steve Cohen (Point72) | 2025Q4 | $23.42 | -17.7% | $216K |
| Steve Cohen (Point72) | 2025Q4 | $23.42 | -17.7% | $216K |
| Wellington Management | 2025Q4 | $23.42 | -17.7% | $4.8M |
| Leon Cooperman (Omega Family Office) | 2021Q4 | $1439.88 | -98.7% | $161.5M |
Who moved on this name in 2025Q4
Position changes reported for the latest quarter, grouped by direction.
New positions5
- Ray Dalio (Bridgewater Associates)+489,928$11.5M
- Wellington Management+248,775$5.8M
- Norges Bank (Norway SWF)+92,105$2.2M
- Steve Cohen (Point72)+20,900$489K
- Paul Tudor Jones (Tudor Investment)+14,300$335K
Added to3
- Ken Griffin (Citadel Advisors)+1,430,949$33.5M
- Ron Baron (Baron Capital / BAMCO)+150,000$3.5M
- Mario Gabelli (GAMCO)+15,310$359K
Trimmed2
- D.E. Shaw & Co.−610,386$14.3M
- AQR Capital Management−14,619$342K
Exited3
- Lee Ainslie (Maverick Capital)−2,588,579$60.2M
- Izzy Englander (Millennium Mgmt)−521,021$12.1M
- Two Sigma Investments−298,500$6.9M
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 8 | $27.79B |
| 2022Q2 | 9 | $30.03B |
| 2022Q3 | 8 | $39.0M |
| 2022Q4 | 10 | $117.2M |
| 2023Q1 | 8 | $150.5M |
| 2023Q2 | 8 | $183.5M |
| 2023Q3 | 7 | $176.7M |
| 2023Q4 | 7 | $250.7M |
| 2024Q1 | 9 | $273.0M |
| 2024Q2 | 10 | $274.2M |
| 2024Q3 | 10 | $117.8M |
| 2024Q4 | 15 | $322.5M |
| 2025Q1 | 13 | $309.4M |
| 2025Q2 | 16 | $406.3M |
| 2025Q3 | 13 | $354.4M |
| 2025Q4 | 16 | $321.4M |
Who owns MIR
16 super-investors · 2025Q4
Tracked stake
14.55M
shares
Combined value
$321M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New6Added5Trim3Held2
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Leon Cooperman Omega Family Office | 8.38M | $196M |
| 2 | Ken Griffin Citadel Advisors | 1.62M | $38M |
| 3 | Ron Baron Baron Capital / BAMCO | 650.0K | $15M |
| 4 | D.E. Shaw & Co. | 629.2K | $15M |
| 5 | Mario Gabelli GAMCO | 541.9K | $13M |
| 6 | Ray Dalio Bridgewater Associates | 489.9K | $11M |
| 7 | D.E. Shaw & Co. | 384.0K | $9M |
| 8 | Ken Griffin Citadel Advisors | 292.7K | $7M |
| 9 | AQR Capital Management | 277.7K | $7M |
| 10 | Wellington Management | 248.8K | $6M |
| 11 | Norges Bank Norway SWF | 92.1K | $2M |
| 12 | Ken Griffin Citadel Advisors | 74.6K | $2M |
| 13 | Paul Tudor Jones Tudor Investment | 14.3K | $335K |
| 14 | Steve Cohen Point72 | 11.2K | $262K |
| 15 | Steve Cohen Point72 | 9.7K | $227K |
| 16 | T. Rowe Price | 834.3K | $20K |
Recent moves
20 transactions
- +20,900 · 2025Q4
- +1,430,949 · 2025Q4
- +248,775 · 2025Q4
- −14,619 · 2025Q4
- +150,000 · 2025Q4
- TRIMD.E. Shaw & Co.−610,386 · 2025Q4
- +14,300 · 2025Q4
- −521,021 · 2025Q4
- −298,500 · 2025Q4
- +489,928 · 2025Q4
- −2,588,579 · 2025Q4
- +92,105 · 2025Q4
- +15,310 · 2025Q4
- +269,850 · 2025Q3
- −2,719,459 · 2025Q3
- −2,360,926 · 2025Q3
- +272,106 · 2025Q3
- +665,185 · 2025Q3
- +1,258,441 · 2025Q3
- −71,700 · 2025Q3
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