Whale Analyzer
SUNB Institutional Holders and 13F Ownership
Compare 8 tracked holders of SUNB, their reported positions and disclosed changes. Coverage is limited to the investors tracked by Whale Analyzer; these records do not establish all shareholders or current trades. Dodge & Cox is the largest reported holder at $4.10B; the top five funds control 97.7% of reported ownership; institutions were net selling last quarter (3 increased, 5 reduced); the stock trades above the aggregate whale cost basis of $62.28. Top tracked holders include Dodge & Cox, Ruane, Cunniff & Goldfarb, Baillie Gifford, and Turtle Creek Asset Management.
Continue to the live SUNB dashboardTop holders
| Investor | Reported value | Shares | Change | Report date |
|---|---|---|---|---|
| Dodge & Cox 13F portfolio Dodge & Cox holdings | $4.10B | 54.8M | Increased | 2026-06-30 |
| Ruane, Cunniff & Goldfarb 13F portfolio Ruane, Cunniff & Goldfarb holdings | $318.8M | 4.3M | Reduced | 2026-06-30 |
| Baillie Gifford 13F portfolio Baillie Gifford & Co holdings | $215.1M | 2.9M | Reduced | 2026-06-30 |
| Turtle Creek Asset Management 13F portfolio Turtle Creek Asset Management holdings | $115.9M | 1.5M | Reduced | 2026-06-30 |
| Dorsey Asset Management 13F portfolio Dorsey Asset Management holdings | $86.1M | 1.2M | Reduced | 2026-06-30 |
| Tom Gayner 13F portfolio Markel Group holdings | $72.9M | 974.4K | Increased | 2026-06-30 |
| George Soros 13F portfolio Soros Fund Management holdings | $38.6M | 516.0K | Reduced | 2026-06-30 |
| Chris Bloomstran 13F portfolio Semper Augustus Investments holdings | $207.5K | 2.8K | New | 2026-06-30 |
Ownership concentration
Reported ownership of SUNB is highly concentrated across tracked institutions.
- Single largest holder: 82.9% of reported ownership
- Top 5 holders: 97.7%
- Top 10 holders: 100.0%
Whale activity this quarter
Across 8 tracked institutions, 5 reduced, 3 increased. Net positioning is net selling.
- Dodge & Cox — Dodge & Cox ($4.10B) (▲ 3.1% qoq shares) · avg cost $63.35
- Ruane, Cunniff & Goldfarb — Ruane, Cunniff & Goldfarb ($318.8M) (▼ 22.4% qoq shares) · avg cost $56.82
- Baillie Gifford — Baillie Gifford & Co ($215.1M) (▼ 5.3% qoq shares) · avg cost $62.10
- Turtle Creek Asset Management — Turtle Creek Asset Management ($115.9M) (▼ 29.6% qoq shares) · avg cost $53.80
- Dorsey Asset Management — Dorsey Asset Management ($86.1M) (▼ 47.8% qoq shares) · avg cost $42.56
- Tom Gayner — Markel Group ($72.9M) (▲ 1.1% qoq shares) · avg cost $63.36
- George Soros — Soros Fund Management ($38.6M) (▼ 5.5% qoq shares) · avg cost $62.04
- Chris Bloomstran — Semper Augustus Investments ($207.5K) · avg cost $63.09
Whale cost basis vs current price
The aggregate tracked cost basis is $62.28 versus a current price of $72.68, so SUNB trades above its cost basis (+16.7%). Average unrealized P&L across tracked holders: 26%.
Sector positioning — Industrials
SUNB sits within the Industrials sector alongside 69 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 SUNB dashboard for price charts and cross-investor scans, or read the SEC 13F guide.
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Learn more in Whale Analyzer Academy
Deepen your read on SUNB with these Whale Analyzer Academy guides:
Frequently asked questions
Who owns SUNB stock?
Whale Analyzer tracks 8 public institutional holders of SUNB with a combined reported value of $4.94B. See the holder table above for the largest tracked positions.
Which top funds are buying SUNB?
Tracked institutions were net selling last quarter — 5 reduced, 3 increased. Check the "Change" column: "New" = fresh position, "Increased" = added, "Reduced" = trimmed.
How concentrated is SUNB ownership?
The top five tracked holders report 97.7% of aggregate ownership.
Is SUNB above or below the whale cost basis?
The aggregate tracked cost basis is $62.28 versus a current price of $72.68 (+16.7%).
What does 13F ownership mean for SUNB?
These are historical reported positions from tracked filers, not real-time ownership or a complete shareholder register. Use the interactive SUNB dashboard to explore them, or read our 13F Alpha Signals Guide.