Ticker · CUSIP 571903202
Holders (tracked)
23
Combined shares
15,940,091
Combined value
$4.36B
Last close
$362.42
Quarter
2025Q4
Tracked holders · last 8 quarters
+5 vs previous quarter over the last 8.
Price is +32.4% vs the avg quarter-end implied price across tracked holders.
SEC event timeline
27 events
- AQR Capital Management trimmed2026-02-17−404 shares · 2025Q413F
- Ken Griffin (Citadel Advisors) trimmed2026-02-17−215,297 shares · 2025Q413F
- D.E. Shaw & Co. trimmed2026-02-17−192,942 shares · 2025Q413F
- Steve Cohen (Point72) added2026-02-17+2,400 shares · 2025Q413F
- T. Rowe Price added2026-02-17+219,579 shares · 2025Q413F
- Wellington Management trimmed2026-02-17−599,202 shares · 2025Q413F
- +11,100 shares · 2025Q413F
- Izzy Englander (Millennium Mgmt) trimmed2026-02-17−99,110 shares · 2025Q413F
- +6,955 shares · 2025Q413F
- −35,160 shares · 2025Q413F
- Renaissance Technologies opened position2026-02-12+7,776 shares · 2025Q413F
- Norges Bank (Norway SWF) opened position2026-02-10+2,619,166 shares · 2025Q413F
- Ken Fisher (Fisher Asset Mgmt) trimmed2026-02-09−1,062 shares · 2025Q413F
- Tom Gayner (Markel Group) added2026-02-06+16,500 shares · 2025Q413F
- −6,088 shares · 2025Q313F
- Two Sigma Investments exited2025-11-14−9,200 shares · 2025Q313F
- D.E. Shaw & Co. added2025-11-14+75,742 shares · 2025Q313F
- AQR Capital Management trimmed2025-11-14−27,714 shares · 2025Q313F
- Lee Ainslie (Maverick Capital) exited2025-11-14−4,212 shares · 2025Q313F
- T. Rowe Price trimmed2025-11-14−798,918 shares · 2025Q313F
- Wellington Management added2025-11-14+1,637,119 shares · 2025Q313F
- Izzy Englander (Millennium Mgmt) added2025-11-14+108,738 shares · 2025Q313F
- +41,321 shares · 2025Q313F
- Norges Bank (Norway SWF) exited2025-11-13−2,338,743 shares · 2025Q313F
- Ken Fisher (Fisher Asset Mgmt) trimmed2025-11-12−197 shares · 2025Q313F
- Norges Bank (Norway SWF) added2025-11-12+78,123 shares · 2024Q313F
- Tom Gayner (Markel Group) added2025-10-31+13,000 shares · 2025Q313F
Insider activity
No insider transactions in the last 30 days.
Follow-the-investor returns
If you'd copied each holder of MAR…
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 | $56.73 | +538.9% | $681.0M |
| Boykin Curry (Eagle Capital) | 2016Q1 | $81.49 | +344.7% | $6.8M |
| Norges Bank (Norway SWF) | 2016Q1 | $147.51 | +145.7% | $949.2M |
| Ken Fisher (Fisher Asset Mgmt) | 2016Q1 | $176.52 | +105.3% | $1.0M |
| AQR Capital Management | 2016Q1 | $220.09 | +64.7% | $24.2M |
| Wellington Management | 2016Q1 | $233.43 | +55.3% | $3.11B |
| Renaissance Technologies | 2016Q1 | $235.23 | +54.1% | $2.8M |
| Lee Ainslie (Maverick Capital) | 2020Q3 | $236.77 | +53.1% | $2.5M |
| Ray Dalio (Bridgewater Associates) | 2016Q1 | $244.56 | +48.2% | $2.2M |
| Tom Gayner (Markel Group) | 2016Q1 | $248.60 | +45.8% | $32.5M |
| Howard Marks (Oaktree Capital) | 2025Q3 | $260.44 | +39.2% | $54.4M |
| Steve Cohen (Point72) | 2016Q2 | $266.56 | +36.0% | $7.2M |
| Steve Cohen (Point72) | 2016Q2 | $266.56 | +36.0% | $7.2M |
| D.E. Shaw & Co. | 2016Q1 | $281.74 | +28.6% | $6.3M |
| D.E. Shaw & Co. | 2016Q1 | $281.74 | +28.6% | $6.3M |
| Ken Griffin (Citadel Advisors) | 2016Q1 | $303.56 | +19.4% | $118.0M |
| Ken Griffin (Citadel Advisors) | 2016Q1 | $303.56 | +19.4% | $118.0M |
| Ken Griffin (Citadel Advisors) | 2016Q1 | $303.56 | +19.4% | $118.0M |
| Paul Tudor Jones (Tudor Investment) | 2016Q2 | $304.69 | +18.9% | $3.5M |
| Paul Tudor Jones (Tudor Investment) | 2016Q2 | $304.69 | +18.9% | $3.5M |
| Izzy Englander (Millennium Mgmt) | 2016Q1 | $306.85 | +18.1% | $32.7M |
| Izzy Englander (Millennium Mgmt) | 2016Q1 | $306.85 | +18.1% | $32.7M |
| Izzy Englander (Millennium Mgmt) | 2016Q1 | $306.85 | +18.1% | $32.7M |
Who moved on this name in 2025Q4
13F transactions reported for the latest quarter, grouped by direction.
New positions4
- Norges Bank (Norway SWF)+2,619,166$812.6M
- Paul Tudor Jones (Tudor Investment)+11,100$3.4M
- Renaissance Technologies+7,776$2.4M
- Lee Ainslie (Maverick Capital)+6,955$2.2M
Added to3
- Tom Gayner (Markel Group)+16,500$5.1M
- Steve Cohen (Point72)+2,400$745K
- T. Rowe Price+219,579$68K
Trimmed7
- Wellington Management−599,202$185.9M
- Ken Griffin (Citadel Advisors)−215,297$66.8M
- D.E. Shaw & Co.−192,942$59.9M
- Izzy Englander (Millennium Mgmt)−99,110$30.7M
- Ray Dalio (Bridgewater Associates)−35,160$10.9M
- Ken Fisher (Fisher Asset Mgmt)−1,062$330K
- AQR Capital Management−404$125K
Exited0
—
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 20 | $401.89B |
| 2022Q2 | 21 | $290.29B |
| 2022Q3 | 23 | $297.2M |
| 2022Q4 | 23 | $4.07B |
| 2023Q1 | 21 | $4.69B |
| 2023Q2 | 22 | $5.03B |
| 2023Q3 | 21 | $4.03B |
| 2023Q4 | 18 | $5.08B |
| 2024Q1 | 21 | $5.71B |
| 2024Q2 | 24 | $5.59B |
| 2024Q3 | 23 | $2.34B |
| 2024Q4 | 21 | $1.41B |
| 2025Q1 | 22 | $2.04B |
| 2025Q2 | 23 | $3.34B |
| 2025Q3 | 18 | $3.21B |
| 2025Q4 | 23 | $4.36B |
Congress members trading this stock
| Date | Member | Type | Amount range | Filing |
|---|---|---|---|---|
| 2025-09-23 | Valerie Hoyle | Sell | $1K – $15K | PDF ↗ |
| 2025-03-14 | Susie Lee | Sell | $1K – $15K | PDF ↗ |
| 2024-10-29 | Valerie Hoyle | Buy | $1K – $15K | PDF ↗ |
Who owns MAR
23 super-investors · 2025Q4
Tracked stake
15.94M
shares
Combined value
$4.36B
% of shares outstanding
—
shares-out unknown
Quarter action mix
New5Added4Trim12Held2
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Wellington Management | 8.58M | $2.66B |
| 2 | Norges Bank Norway SWF | 2.62M | $813M |
| 3 | Ken Griffin Citadel Advisors | 1.70M | $527M |
| 4 | Ken Griffin Citadel Advisors | 325.5K | $101M |
| 5 | Ken Griffin Citadel Advisors | 229.3K | $71M |
| 6 | Howard Marks Oaktree Capital | 150.0K | $47M |
| 7 | Izzy Englander Millennium Mgmt | 90.2K | $28M |
| 8 | Tom Gayner Markel Group | 89.8K | $28M |
| 9 | Izzy Englander Millennium Mgmt | 77.8K | $24M |
| 10 | AQR Capital Management | 66.8K | $21M |
| 11 | Steve Cohen Point72 | 19.9K | $6M |
| 12 | Steve Cohen Point72 | 19.0K | $6M |
| 13 | Boykin Curry Eagle Capital | 18.8K | $6M |
| 14 | Izzy Englander Millennium Mgmt | 17.5K | $5M |
| 15 | D.E. Shaw & Co. | 17.2K | $5M |
| 16 | D.E. Shaw & Co. | 10.0K | $3M |
| 17 | Paul Tudor Jones Tudor Investment | 9.7K | $3M |
| 18 | Renaissance Technologies | 7.8K | $2M |
| 19 | Lee Ainslie Maverick Capital | 7.0K | $2M |
| 20 | Ray Dalio Bridgewater Associates | 6.2K | $2M |
| 21 | Ken Fisher Fisher Asset Mgmt | 2.9K | $896K |
| 22 | T. Rowe Price | 1.88M | $583K |
| 23 | Paul Tudor Jones Tudor Investment | 1.4K | $434K |
Recent moves
20 transactions
- +11,100 · 2025Q4
- TRIMD.E. Shaw & Co.−192,942 · 2025Q4
- +219,579 · 2025Q4
- −99,110 · 2025Q4
- −404 · 2025Q4
- −599,202 · 2025Q4
- −215,297 · 2025Q4
- +2,400 · 2025Q4
- +6,955 · 2025Q4
- −35,160 · 2025Q4
- +7,776 · 2025Q4
- +2,619,166 · 2025Q4
- −1,062 · 2025Q4
- +16,500 · 2025Q4
- −6,088 · 2025Q3
- +108,738 · 2025Q3
- −9,200 · 2025Q3
- +75,742 · 2025Q3
- −4,212 · 2025Q3
- TRIMT. Rowe Price−798,918 · 2025Q3
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