Who owns MDLN? 13F holders and whale ownership
MDLN is tracked across public portfolios in Whale Analyzer. This page answers who owns MDLN, which top funds are buying MDLN, aggregate disclosed value, and recent position changes based on public data. Stephen Mandel is the largest reported holder at $525M; the top five funds control 99.9% of reported ownership; institutions were net selling last quarter (2 increased, 2 reduced); the stock trades below the aggregate whale cost basis of $39.22. Top tracked holders include Stephen Mandel, Andreas Halvorsen, Baillie Gifford, and George Soros.
Continue to the live MDLN dashboardTop holders
| Investor | Reported value | Shares | Change |
|---|---|---|---|
| Stephen Mandel 13F portfolio Lone Pine Capital holdings | $524.6M | 11.8M | Increased |
| Andreas Halvorsen 13F portfolio Viking Global Investors holdings | $508.8M | 11.4M | Increased |
| Baillie Gifford 13F portfolio Baillie Gifford & Co holdings | $443.9M | 10.0M | Reduced |
| George Soros 13F portfolio Soros Fund Management holdings | $57.2M | 1.3M | Reduced |
| Lee Ainslie 13F portfolio Maverick Capital holdings | $35.4M | 796.1K | Held |
| Joseph Edelman 13F portfolio Perceptive Advisors holdings | $1.2M | 28.0K | Held |
Ownership concentration
Reported ownership of MDLN is highly concentrated across tracked institutions.
- Single largest holder: 33.4% of reported ownership
- Top 5 holders: 99.9%
- Top 10 holders: 100.0%
Whale activity this quarter
Across 6 tracked institutions, 2 increased, 2 reduced, 2 held. Net positioning is net selling.
- Stephen Mandel — Lone Pine Capital ($524.6M) (▲ 0.6% qoq shares) · avg cost $39.50
- Andreas Halvorsen — Viking Global Investors ($508.8M) (▲ 64.3% qoq shares) · avg cost $39.30
- Baillie Gifford — Baillie Gifford & Co ($443.9M) (▼ 4.2% qoq shares) · avg cost $39.04
- George Soros — Soros Fund Management ($57.2M) (▼ 18.6% qoq shares) · avg cost $37.11
- Lee Ainslie — Maverick Capital ($35.4M) (→ 0.0% qoq shares) · avg cost $39.50
- Joseph Edelman — Perceptive Advisors ($1.2M) (→ 0.0% qoq shares) · avg cost $39.50
Whale cost basis vs current price
The aggregate tracked cost basis is $39.22 versus a current price of $38.87, so MDLN trades below its cost basis (-0.9%). Average unrealized P&L across tracked holders: -7%.
Sector positioning — Health Care
MDLN sits within the Health Care sector alongside 221 other tracked names. Compare whale ownership across peers:
How to use this page
Values are reported public positions from tracked 13F filers and disclosures — not real-time ownership totals. Open the live MDLN dashboard for price charts and cross-investor scans, or read the SEC 13F guide.
Related stock holder pages
- VST whale holders — VISTRA CORP
- ASML whale holders — ASML HLDG NV
- CRS whale holders — CARPENTER TECHNOLOGY CORP
- LPLA whale holders — LPL FINL HLDGS INC
- APP whale holders — APPLOVIN CORP
- TLN whale holders — TALEN ENERGY CORP
- TER whale holders — TERADYNE INC
- CVNA whale holders — CARVANA CO
Learn more in Whale Analyzer Academy
Deepen your read on MDLN with these Whale Analyzer Academy guides:
Frequently asked questions
Who owns MDLN stock?
Whale Analyzer tracks 6 public institutional holders of MDLN with a combined reported value of $1.57B. See the holder table above for the largest tracked positions.
Which top funds are buying MDLN?
Tracked institutions were net selling last quarter — 2 increased, 2 reduced, 2 held. Check the "Change" column: "New" = fresh position, "Increased" = added, "Reduced" = trimmed.
How concentrated is MDLN ownership?
The top five tracked holders report 99.9% of aggregate ownership.
Is MDLN above or below the whale cost basis?
The aggregate tracked cost basis is $39.22 versus a current price of $38.87 (-0.9%).
What does 13F ownership mean for MDLN?
Use the interactive MDLN dashboard on Whale Analyzer for real-time holder analysis, or read our 13F Alpha Signals Guide.