Who owns SEI? 13F holders and whale ownership
SEI is tracked across public portfolios in Whale Analyzer. This page answers who owns SEI, which top funds are buying SEI, aggregate disclosed value, and recent position changes based on public data. Leopold Aschenbrenner is the largest reported holder at $62M; the top five funds control 100.0% of reported ownership; institutions were net selling last quarter (1 increased, 1 reduced); the stock trades above the aggregate whale cost basis of $15.13. Top tracked holders include Leopold Aschenbrenner and Polen Capital.
Continue to the live SEI dashboardTop holders
| Investor | Reported value | Shares | Change |
|---|---|---|---|
| Leopold Aschenbrenner 13F portfolio Situational Awareness LP holdings | $62.5M | 1.1M | Reduced |
| Polen Capital 13F portfolio Polen Capital Management holdings | $4.7M | 83.7K | Increased |
Ownership concentration
Reported ownership of SEI is highly concentrated across tracked institutions.
- Single largest holder: 93.0% of reported ownership
- Top 5 holders: 100.0%
- Top 10 holders: 100.0%
Whale activity this quarter
Across 2 tracked institutions, 1 reduced, 1 increased. Net positioning is net selling.
- Leopold Aschenbrenner — Situational Awareness LP ($62.5M) (▼ 40.8% qoq shares) · avg cost $12.72
- Polen Capital — Polen Capital Management ($4.7M) (▲ 192.6% qoq shares) · avg cost $46.87
Whale cost basis vs current price
The aggregate tracked cost basis is $15.13 versus a current price of $76.80, so SEI trades above its cost basis (+407.8%). Average unrealized P&L across tracked holders: 257%.
Sector positioning — Energy
SEI sits within the Energy sector alongside 58 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 SEI dashboard for price charts and cross-investor scans, or read the SEC 13F guide.
Related stock holder pages
- BE whale holders — BLOOM ENERGY CORP
- SNDK whale holders — SANDISK CORP
- CRWV whale holders — COREWEAVE INC
- IREN whale holders — IREN LIMITED
- CORZZ whale holders — CORE SCIENTIFIC INC NEW
- APLD whale holders — APPLIED DIGITAL CORP
- RIOT whale holders — RIOT PLATFORMS INC
- CLSKW whale holders — CLEANSPARK INC
Learn more in Whale Analyzer Academy
Deepen your read on SEI with these Whale Analyzer Academy guides:
Frequently asked questions
Who owns SEI stock?
Whale Analyzer tracks 2 public institutional holders of SEI with a combined reported value of $67.2M. See the holder table above for the largest tracked positions.
Which top funds are buying SEI?
Tracked institutions were net selling last quarter — 1 reduced, 1 increased. Check the "Change" column: "New" = fresh position, "Increased" = added, "Reduced" = trimmed.
How concentrated is SEI ownership?
The top five tracked holders report 100.0% of aggregate ownership.
Is SEI above or below the whale cost basis?
The aggregate tracked cost basis is $15.13 versus a current price of $76.80 (+407.8%).
What does 13F ownership mean for SEI?
Use the interactive SEI dashboard on Whale Analyzer for real-time holder analysis, or read our 13F Alpha Signals Guide.