Ticker · CUSIP 571748102
Holders (tracked)
25
Combined shares
44,378,821
Combined value
$6.52B
Last close
$182.57
Quarter
2025Q4
Tracked holders · last 8 quarters
+7 vs previous quarter over the last 8.
Price is +24.2% vs the avg quarter-end implied price across tracked holders.
SEC event timeline
30 events
- Ken Griffin (Citadel Advisors) added2026-02-17+430,842 shares · 2025Q413F
- Steve Cohen (Point72) opened position2026-02-17+184,863 shares · 2025Q413F
- T. Rowe Price added2026-02-17+868,114 shares · 2025Q413F
- Wellington Management added2026-02-17+906,402 shares · 2025Q413F
- Longview Partners (Guernsey) trimmed2026-02-17−71,800 shares · 2025Q413F
- +220,096 shares · 2025Q413F
- AQR Capital Management added2026-02-17+445,558 shares · 2025Q413F
- D.E. Shaw & Co. added2026-02-17+19,345 shares · 2025Q413F
- Two Sigma Investments added2026-02-17+149,771 shares · 2025Q413F
- Izzy Englander (Millennium Mgmt) added2026-02-17+540,513 shares · 2025Q413F
- −36,290 shares · 2025Q413F
- Renaissance Technologies trimmed2026-02-12−722,700 shares · 2025Q413F
- Norges Bank (Norway SWF) opened position2026-02-10+8,386,530 shares · 2025Q413F
- Ken Fisher (Fisher Asset Mgmt) added2026-02-09+580 shares · 2025Q413F
- Tom Gayner (Markel Group) added2026-02-06+6,750 shares · 2025Q413F
- Baillie Gifford & Co added2026-01-23+4,806 shares · 2025Q413F
- −96,609 shares · 2025Q313F
- AQR Capital Management added2025-11-14+602,056 shares · 2025Q313F
- Izzy Englander (Millennium Mgmt) trimmed2025-11-14−509,556 shares · 2025Q313F
- Steve Cohen (Point72) exited2025-11-14−167,460 shares · 2025Q313F
- Two Sigma Investments added2025-11-14+106,857 shares · 2025Q313F
- D.E. Shaw & Co. added2025-11-14+1,372,137 shares · 2025Q313F
- T. Rowe Price trimmed2025-11-14−1,693,073 shares · 2025Q313F
- Wellington Management added2025-11-14+1,260,434 shares · 2025Q313F
- +62,067 shares · 2025Q313F
- Renaissance Technologies added2025-11-13+146,369 shares · 2025Q313F
- Longview Partners (Guernsey) trimmed2025-11-13−180,221 shares · 2025Q313F
- Norges Bank (Norway SWF) exited2025-11-13−6,076,595 shares · 2025Q313F
- Ken Fisher (Fisher Asset Mgmt) trimmed2025-11-12−121 shares · 2025Q313F
- Norges Bank (Norway SWF) trimmed2025-11-12−295,267 shares · 2024Q313F
Insider activity
No insider transactions in the last 30 days.
Follow-the-investor returns
If you'd copied each holder of MRSH…
Cost basis inferred from 13F share-delta history. Sorted by % return on the position they're still holding.
| Investor | First in | Cost basis | Return | Position value today |
|---|---|---|---|---|
| T. Rowe Price | 2016Q1 | $35.35 | +416.4% | $1.68B |
| Tom Gayner (Markel Group) | 2016Q1 | $86.87 | +110.2% | $139.1M |
| Mario Gabelli (GAMCO) | 2016Q1 | $112.27 | +62.6% | $3.5M |
| Wellington Management | 2016Q1 | $143.21 | +27.5% | $2.92B |
| Longview Partners (Guernsey) | 2021Q2 | $148.90 | +22.6% | $368.3M |
| Ken Fisher (Fisher Asset Mgmt) | 2016Q2 | $177.33 | +3.0% | $397K |
| Renaissance Technologies | 2016Q3 | $180.30 | +1.3% | $72.6M |
| AQR Capital Management | 2016Q1 | $181.06 | +0.8% | $269.8M |
| Ken Griffin (Citadel Advisors) | 2016Q1 | $185.71 | -1.7% | $21.4M |
| Ken Griffin (Citadel Advisors) | 2016Q1 | $185.71 | -1.7% | $21.4M |
| Ken Griffin (Citadel Advisors) | 2016Q1 | $185.71 | -1.7% | $21.4M |
| Izzy Englander (Millennium Mgmt) | 2016Q1 | $185.86 | -1.8% | $132.3M |
| Izzy Englander (Millennium Mgmt) | 2016Q1 | $185.86 | -1.8% | $132.3M |
| Izzy Englander (Millennium Mgmt) | 2016Q1 | $185.86 | -1.8% | $132.3M |
| Paul Tudor Jones (Tudor Investment) | 2016Q4 | $186.00 | -1.8% | $1.5M |
| Paul Tudor Jones (Tudor Investment) | 2016Q4 | $186.00 | -1.8% | $1.5M |
| Paul Tudor Jones (Tudor Investment) | 2016Q4 | $186.00 | -1.8% | $1.5M |
| Steve Cohen (Point72) | 2016Q4 | $186.91 | -2.3% | $694K |
| Steve Cohen (Point72) | 2016Q4 | $186.91 | -2.3% | $694K |
| Steve Cohen (Point72) | 2016Q4 | $186.91 | -2.3% | $694K |
| Ray Dalio (Bridgewater Associates) | 2016Q1 | $201.19 | -9.3% | $4.7M |
| Two Sigma Investments | 2016Q1 | $211.71 | -13.8% | $228.2M |
| D.E. Shaw & Co. | 2016Q1 | $213.45 | -14.5% | $474.0M |
| Baillie Gifford & Co | 2024Q3 | $218.86 | -16.6% | $15.9M |
| Norges Bank (Norway SWF) | 2016Q1 | $32661.83 | -99.4% | $1.53B |
Who moved on this name in 2025Q4
13F transactions reported for the latest quarter, grouped by direction.
New positions3
- Norges Bank (Norway SWF)+8,386,530$1.56B
- Paul Tudor Jones (Tudor Investment)+220,096$40.8M
- Steve Cohen (Point72)+184,863$34.3M
Added to10
- Wellington Management+906,402$168.2M
- Izzy Englander (Millennium Mgmt)+540,513$100.3M
- AQR Capital Management+445,558$82.7M
- Ken Griffin (Citadel Advisors)+430,842$79.9M
- Two Sigma Investments+149,771$27.8M
- D.E. Shaw & Co.+19,345$3.6M
- Tom Gayner (Markel Group)+6,750$1.3M
- Baillie Gifford & Co+4,806$892K
- T. Rowe Price+868,114$161K
- Ken Fisher (Fisher Asset Mgmt)+580$108K
Trimmed3
- Renaissance Technologies−722,700$134.1M
- Longview Partners (Guernsey)−71,800$13.3M
- Ray Dalio (Bridgewater Associates)−36,290$6.7M
Exited0
—
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 26 | $651.83B |
| 2022Q2 | 23 | $594.06B |
| 2022Q3 | 21 | $555.1M |
| 2022Q4 | 23 | $11.14B |
| 2023Q1 | 24 | $11.38B |
| 2023Q2 | 22 | $12.50B |
| 2023Q3 | 20 | $9.75B |
| 2023Q4 | 19 | $9.75B |
| 2024Q1 | 17 | $13.38B |
| 2024Q2 | 20 | $13.23B |
| 2024Q3 | 23 | $4.50B |
| 2024Q4 | 19 | $2.63B |
| 2025Q1 | 18 | $4.66B |
| 2025Q2 | 22 | $6.12B |
| 2025Q3 | 18 | $4.97B |
| 2025Q4 | 25 | $6.52B |
Who owns MRSH
25 super-investors · 2025Q4
Tracked stake
44.38M
shares
Combined value
$6.52B
% of shares outstanding
—
shares-out unknown
Quarter action mix
New7Added14Trim3Held1
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Wellington Management | 16.00M | $2.97B |
| 2 | Norges Bank Norway SWF | 8.39M | $1.56B |
| 3 | D.E. Shaw & Co. | 2.60M | $482M |
| 4 | Longview Partners Guernsey | 2.02M | $374M |
| 5 | AQR Capital Management | 1.48M | $274M |
| 6 | Two Sigma Investments | 1.25M | $232M |
| 7 | Ken Griffin Citadel Advisors | 822.4K | $153M |
| 8 | Tom Gayner Markel Group | 761.8K | $141M |
| 9 | Izzy Englander Millennium Mgmt | 724.6K | $134M |
| 10 | Renaissance Technologies | 397.6K | $74M |
| 11 | Paul Tudor Jones Tudor Investment | 220.1K | $41M |
| 12 | Steve Cohen Point72 | 184.9K | $34M |
| 13 | Ken Griffin Citadel Advisors | 117.4K | $22M |
| 14 | Baillie Gifford & Co | 87.2K | $16M |
| 15 | Ray Dalio Bridgewater Associates | 25.8K | $5M |
| 16 | Izzy Englander Millennium Mgmt | 19.9K | $4M |
| 17 | Mario Gabelli GAMCO | 19.3K | $4M |
| 18 | Steve Cohen Point72 | 16.4K | $3M |
| 19 | Izzy Englander Millennium Mgmt | 12.9K | $2M |
| 20 | T. Rowe Price | 9.22M | $2M |
| 21 | Paul Tudor Jones Tudor Investment | 8.4K | $2M |
| 22 | Ken Griffin Citadel Advisors | 7.6K | $1M |
| 23 | Steve Cohen Point72 | 3.8K | $705K |
| 24 | Paul Tudor Jones Tudor Investment | 3.2K | $594K |
| 25 | Ken Fisher Fisher Asset Mgmt | 2.2K | $404K |
Recent moves
20 transactions
- −71,800 · 2025Q4
- +19,345 · 2025Q4
- +445,558 · 2025Q4
- +220,096 · 2025Q4
- +149,771 · 2025Q4
- +184,863 · 2025Q4
- +430,842 · 2025Q4
- +868,114 · 2025Q4
- +906,402 · 2025Q4
- +540,513 · 2025Q4
- −36,290 · 2025Q4
- −722,700 · 2025Q4
- +8,386,530 · 2025Q4
- +580 · 2025Q4
- +6,750 · 2025Q4
- +4,806 · 2025Q4
- −96,609 · 2025Q3
- −509,556 · 2025Q3
- −167,460 · 2025Q3
- +106,857 · 2025Q3
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