Who owns WSO-B? 13F holders and whale ownership
WSO-B is tracked across public portfolios in Whale Analyzer. This page answers who owns WSO-B, which top funds are buying WSO-B, aggregate disclosed value, and recent position changes based on public data. Baillie Gifford is the largest reported holder at $414M; the top five funds control 100.0% of reported ownership; institutions were net buying last quarter (2 increased, 0 reduced); the stock trades above the aggregate whale cost basis of $215.81. Top tracked holders include Baillie Gifford and Tom Gayner.
Continue to the live WSO-B dashboardTop holders
| Investor | Reported value | Shares | Change |
|---|---|---|---|
| Baillie Gifford 13F portfolio Baillie Gifford & Co holdings | $413.7M | 1.1M | Increased |
| Tom Gayner 13F portfolio Markel Group holdings | $211.8M | 582.2K | Increased |
Ownership concentration
Reported ownership of WSO-B is highly concentrated across tracked institutions.
- Single largest holder: 66.1% of reported ownership
- Top 5 holders: 100.0%
- Top 10 holders: 100.0%
Whale activity this quarter
Across 2 tracked institutions, 2 increased. Net positioning is net buying.
- Baillie Gifford — Baillie Gifford & Co ($413.7M) (▲ 24.0% qoq shares)
- Tom Gayner — Markel Group ($211.8M) (▲ 0.8% qoq shares) · avg cost $215.81
Whale cost basis vs current price
The aggregate tracked cost basis is $215.81 versus a current price of $350.00, so WSO-B trades above its cost basis (+62.2%). Average unrealized P&L across tracked holders: 87%.
Sector positioning — Industrials
WSO-B sits within the Industrials sector alongside 85 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 WSO-B dashboard for price charts and cross-investor scans, or read the SEC 13F guide.
Related stock holder pages
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- SPOT whale holders — Spotify Technology SA
- NU whale holders — Nu Holdings Ltd.
- SHOP whale holders — Shopify 'A'
- NET whale holders — Cloudflare Inc
- SE whale holders — Sea Ltd ADR
Learn more in Whale Analyzer Academy
Deepen your read on WSO-B with these Whale Analyzer Academy guides:
Frequently asked questions
Who owns WSO-B stock?
Whale Analyzer tracks 2 public institutional holders of WSO-B with a combined reported value of $625.5M. See the holder table above for the largest tracked positions.
Which top funds are buying WSO-B?
Tracked institutions were net buying last quarter — 2 increased. Check the "Change" column: "New" = fresh position, "Increased" = added, "Reduced" = trimmed.
How concentrated is WSO-B ownership?
The top five tracked holders report 100.0% of aggregate ownership.
Is WSO-B above or below the whale cost basis?
The aggregate tracked cost basis is $215.81 versus a current price of $350.00 (+62.2%).
What does 13F ownership mean for WSO-B?
Use the interactive WSO-B dashboard on Whale Analyzer for real-time holder analysis, or read our 13F Alpha Signals Guide.