Ticker · CUSIP 58507V107
Holders (tracked)
16
Combined shares
53,086,075
Combined value
$2.23B
Last close
$47.64
Quarter
2025Q4
Price · 1Y$47.64+6.64 (+16.20%)H $49.99 · L $39.00 · Avg Vol 7.1M
Position opened
Price is +13.4% vs the avg quarter-end implied price across tracked holders.
SEC event timeline
14 events
- +6,006,339 shares · 2025Q4Position
- D.E. Shaw & Co. opened position2026-02-17+884,500 shares · 2025Q4Position
- +6,959,157 shares · 2025Q4Position
- T. Rowe Price opened position2026-02-17+7,325,104 shares · 2025Q4Position
- +464,454 shares · 2025Q4Position
- +377,131 shares · 2025Q4Position
- Steve Cohen (Point72) opened position2026-02-17+891,100 shares · 2025Q4Position
- Two Sigma Investments opened position2026-02-17+6,500 shares · 2025Q4Position
- +11,716,697 shares · 2025Q4Position
- +184,545 shares · 2025Q4Position
- +796,077 shares · 2025Q4Position
- +1,580,000 shares · 2025Q4Position
- Norges Bank (Norway SWF) opened position2026-02-10+5,000,000 shares · 2025Q4Position
- Baillie Gifford & Co opened position2026-01-23+10,410,371 shares · 2025Q4Position
Insider activity
No insider transactions in the last 30 days.
Follow-the-investor returns
If you'd copied each holder of MDLN…
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 |
|---|---|---|---|---|
| Stephen Mandel (Lone Pine Capital) | 2025Q4 | $42.00 | +13.4% | $558.2M |
| Baillie Gifford & Co | 2025Q4 | $42.00 | +13.4% | $496.0M |
| Andreas Halvorsen (Viking Global) | 2025Q4 | $42.00 | +13.4% | $331.5M |
| Ken Griffin (Citadel Advisors) | 2025Q4 | $42.00 | +13.4% | $11.2M |
| Norges Bank (Norway SWF) | 2025Q4 | $42.00 | +13.4% | $238.2M |
| George Soros (Soros Fund Mgmt) | 2025Q4 | $42.00 | +13.4% | $75.3M |
| Steve Cohen (Point72) | 2025Q4 | $42.00 | +13.4% | $42.5M |
| D.E. Shaw & Co. | 2025Q4 | $42.00 | +13.4% | $42.1M |
| Lee Ainslie (Maverick Capital) | 2025Q4 | $42.00 | +13.4% | $37.9M |
| Paul Tudor Jones (Tudor Investment) | 2025Q4 | $42.00 | +13.4% | $22.1M |
| Dan Sundheim (D1 Capital) | 2025Q4 | $42.00 | +13.4% | $18.0M |
| Ken Griffin (Citadel Advisors) | 2025Q4 | $42.00 | +13.4% | $11.2M |
| Ken Griffin (Citadel Advisors) | 2025Q4 | $42.00 | +13.4% | $11.2M |
| Izzy Englander (Millennium Mgmt) | 2025Q4 | $42.00 | +13.4% | $8.8M |
| Two Sigma Investments | 2025Q4 | $42.00 | +13.4% | $310K |
| T. Rowe Price | 2025Q4 | $42.00 | +13.4% | $349.0M |
Who moved on this name in 2025Q4
Position changes reported for the latest quarter, grouped by direction.
New positions14
- Stephen Mandel (Lone Pine Capital)+11,716,697$492.1M
- Baillie Gifford & Co+10,410,371$437.2M
- Andreas Halvorsen (Viking Global)+6,959,157$292.3M
- Ken Griffin (Citadel Advisors)+6,006,339$252.3M
- Norges Bank (Norway SWF)+5,000,000$210.0M
- George Soros (Soros Fund Mgmt)+1,580,000$66.4M
- Steve Cohen (Point72)+891,100$37.4M
- D.E. Shaw & Co.+884,500$37.1M
- Lee Ainslie (Maverick Capital)+796,077$33.4M
- Paul Tudor Jones (Tudor Investment)+464,454$19.5M
- + 4 more…
Added to0
—
Trimmed0
—
Exited0
—
Who owns MDLN
16 super-investors · 2025Q4
Tracked stake
53.09M
shares
Combined value
$2.23B
% of shares outstanding
—
shares-out unknown
Quarter action mix
New16
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Stephen Mandel Lone Pine Capital | 11.72M | $492M |
| 2 | Baillie Gifford & Co | 10.41M | $437M |
| 3 | T. Rowe Price | 7.33M | $308M |
| 4 | Andreas Halvorsen Viking Global | 6.96M | $292M |
| 5 | Ken Griffin Citadel Advisors | 6.01M | $252M |
| 6 | Norges Bank Norway SWF | 5.00M | $210M |
| 7 | George Soros Soros Fund Mgmt | 1.58M | $66M |
| 8 | Steve Cohen Point72 | 891.1K | $37M |
| 9 | D.E. Shaw & Co. | 884.5K | $37M |
| 10 | Lee Ainslie Maverick Capital | 796.1K | $33M |
| 11 | Paul Tudor Jones Tudor Investment | 464.5K | $20M |
| 12 | Dan Sundheim D1 Capital | 377.1K | $16M |
| 13 | Ken Griffin Citadel Advisors | 248.7K | $10M |
| 14 | Ken Griffin Citadel Advisors | 235.4K | $10M |
| 15 | Izzy Englander Millennium Mgmt | 184.5K | $8M |
| 16 | Two Sigma Investments | 6.5K | $273K |
Recent moves
14 transactions
- +6,006,339 · 2025Q4
- +884,500 · 2025Q4
- +6,959,157 · 2025Q4
- +7,325,104 · 2025Q4
- +464,454 · 2025Q4
- +377,131 · 2025Q4
- +891,100 · 2025Q4
- +6,500 · 2025Q4
- +11,716,697 · 2025Q4
- +184,545 · 2025Q4
- +796,077 · 2025Q4
- +1,580,000 · 2025Q4
- +5,000,000 · 2025Q4
- +10,410,371 · 2025Q4
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