Ticker · CUSIP 601137102
Holders (tracked)
14
Combined shares
17,868,860
Combined value
$533.71M
Last close
$31.03
Quarter
2025Q4
Price · 1Y$31.03+9.37 (+43.23%)H $32.94 · L $21.30 · Avg Vol 1.5M
Position opened
Tracked holders · last 8 quarters
+2 vs previous quarter over the last 4.
Price is +3.9% vs the avg quarter-end implied price across tracked holders.
SEC event timeline
24 events
- Greenhaven Associates exited2026-04-06−4,596,584 shares · 2026Q1Position
- D.E. Shaw & Co. opened position2026-02-17+97,804 shares · 2025Q4Position
- Two Sigma Investments added2026-02-17+1,392,191 shares · 2025Q4Position
- Steve Cohen (Point72) opened position2026-02-17+51,484 shares · 2025Q4Position
- Ken Griffin (Citadel Advisors) added2026-02-17+3,206,342 shares · 2025Q4Position
- T. Rowe Price added2026-02-17+30,569 shares · 2025Q4Position
- Wellington Management trimmed2026-02-17−2,267,132 shares · 2025Q4Position
- Izzy Englander (Millennium Mgmt) trimmed2026-02-17−317,102 shares · 2025Q4Position
- Ron Baron (Baron Capital / BAMCO) exited2026-02-17−20 shares · 2025Q4Position
- AQR Capital Management trimmed2026-02-17−133,571 shares · 2025Q4Position
- Renaissance Technologies trimmed2026-02-12−23,133 shares · 2025Q4Position
- Norges Bank (Norway SWF) opened position2026-02-10+3,408,096 shares · 2025Q4Position
- Mario Gabelli (GAMCO) trimmed2026-02-05−6,894 shares · 2025Q4Position
- Greenhaven Associates trimmed2026-01-07−4,689 shares · 2025Q4Position
- T. Rowe Price added2025-11-14+11,730 shares · 2025Q3Position
- Wellington Management added2025-11-14+908,189 shares · 2025Q3Position
- −171,506 shares · 2025Q3Position
- AQR Capital Management trimmed2025-11-14−451,201 shares · 2025Q3Position
- Izzy Englander (Millennium Mgmt) added2025-11-14+896,938 shares · 2025Q3Position
- Two Sigma Investments opened position2025-11-14+474,618 shares · 2025Q3Position
- Norges Bank (Norway SWF) exited2025-11-13−547,665 shares · 2025Q3Position
- Renaissance Technologies added2025-11-13+343,400 shares · 2025Q3Position
- Mario Gabelli (GAMCO) trimmed2025-11-12−8,758 shares · 2025Q3Position
- Greenhaven Associates trimmed2025-11-04−3,286,243 shares · 2025Q3Position
Insider activity
No insider transactions in the last 30 days.
Follow-the-investor returns
If you'd copied each holder of MRP…
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 |
|---|---|---|---|---|
| AQR Capital Management | 2025Q1 | $26.33 | +17.9% | $21.1M |
| Greenhaven Associates | 2025Q1 | $26.51 | +17.1% | $142.6M |
| Mario Gabelli (GAMCO) | 2025Q1 | $27.06 | +14.7% | $10.9M |
| T. Rowe Price | 2025Q1 | $28.05 | +10.6% | $3.8M |
| D.E. Shaw & Co. | 2025Q1 | $28.65 | +8.3% | $3.0M |
| Wellington Management | 2025Q1 | $28.70 | +8.1% | $20.9M |
| Norges Bank (Norway SWF) | 2025Q2 | $29.65 | +4.6% | $105.8M |
| Steve Cohen (Point72) | 2025Q4 | $29.87 | +3.9% | $1.6M |
| Ken Griffin (Citadel Advisors) | 2025Q1 | $29.91 | +3.7% | $3.4M |
| Ken Griffin (Citadel Advisors) | 2025Q1 | $29.91 | +3.7% | $3.4M |
| Ken Griffin (Citadel Advisors) | 2025Q1 | $29.91 | +3.7% | $3.4M |
| Izzy Englander (Millennium Mgmt) | 2025Q1 | $30.62 | +1.4% | $40.3M |
| Two Sigma Investments | 2025Q3 | $30.82 | +0.7% | $57.9M |
| Renaissance Technologies | 2025Q2 | $30.87 | +0.5% | $22.3M |
Who moved on this name in 2025Q4
Position changes reported for the latest quarter, grouped by direction.
New positions3
- Norges Bank (Norway SWF)+3,408,096$101.8M
- D.E. Shaw & Co.+97,804$2.9M
- Steve Cohen (Point72)+51,484$1.5M
Added to3
- Ken Griffin (Citadel Advisors)+3,206,342$95.8M
- Two Sigma Investments+1,392,191$41.6M
- T. Rowe Price+30,569$913
Trimmed6
- Wellington Management−2,267,132$67.7M
- Izzy Englander (Millennium Mgmt)−317,102$9.5M
- AQR Capital Management−133,571$4.0M
- Renaissance Technologies−23,133$691K
- Mario Gabelli (GAMCO)−6,894$206K
- Greenhaven Associates−4,689$140K
Exited1
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2025Q1 | 16 | $451.9M |
| 2025Q2 | 12 | $430.8M |
| 2025Q3 | 12 | $423.1M |
| 2025Q4 | 14 | $533.7M |
Congress members trading this stock
| Date | Member | Type | Amount range | Filing |
|---|---|---|---|---|
| 2025-02-24 | Jefferson Shreve | Sell | $1K – $15K | PDF ↗ |
| 2025-02-24 | Jefferson Shreve | Sell | $1K – $15K | PDF ↗ |
Who owns MRP
14 super-investors · 2025Q4
Tracked stake
17.87M
shares
Combined value
$534M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New3Added5Trim6
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Greenhaven Associates | 4.60M | $137M |
| 2 | Ken Griffin Citadel Advisors | 3.75M | $112M |
| 3 | Norges Bank Norway SWF | 3.41M | $102M |
| 4 | Two Sigma Investments | 1.87M | $56M |
| 5 | Izzy Englander Millennium Mgmt | 1.30M | $39M |
| 6 | Renaissance Technologies | 718.9K | $21M |
| 7 | AQR Capital Management | 680.3K | $20M |
| 8 | Wellington Management | 672.6K | $20M |
| 9 | Mario Gabelli GAMCO | 350.3K | $10M |
| 10 | Ken Griffin Citadel Advisors | 144.8K | $4M |
| 11 | T. Rowe Price | 122.3K | $4M |
| 12 | Ken Griffin Citadel Advisors | 108.8K | $3M |
| 13 | D.E. Shaw & Co. | 97.8K | $3M |
| 14 | Steve Cohen Point72 | 51.5K | $2M |
Recent moves
20 transactions
- −4,596,584 · 2026Q1
- −133,571 · 2025Q4
- +97,804 · 2025Q4
- +1,392,191 · 2025Q4
- +3,206,342 · 2025Q4
- +30,569 · 2025Q4
- −2,267,132 · 2025Q4
- −317,102 · 2025Q4
- +51,484 · 2025Q4
- −20 · 2025Q4
- −23,133 · 2025Q4
- +3,408,096 · 2025Q4
- −6,894 · 2025Q4
- −4,689 · 2025Q4
- +896,938 · 2025Q3
- +11,730 · 2025Q3
- +474,618 · 2025Q3
- +908,189 · 2025Q3
- −171,506 · 2025Q3
- −451,201 · 2025Q3
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