Who owns ACI? 13F holders and whale ownership
ACI is tracked across public portfolios in Whale Analyzer. This page answers who owns ACI, which top funds are buying ACI, aggregate disclosed value, and recent position changes based on public data. Mason Hawkins is the largest reported holder at $126M; the top five funds control 100.0% of reported ownership; institutions were net buying last quarter (1 increased, 0 reduced); the stock trades below the aggregate whale cost basis of $16.49. Top tracked holders include Mason Hawkins.
Continue to the live ACI dashboardTop holders
| Investor | Reported value | Shares | Change |
|---|---|---|---|
| Mason Hawkins 13F portfolio Southeastern Asset Management holdings | $126.4M | 7.4M | Increased |
Ownership concentration
Reported ownership of ACI is highly concentrated across tracked institutions.
- Single largest holder: 100.0% of reported ownership
- Top 5 holders: 100.0%
- Top 10 holders: 100.0%
Whale activity this quarter
Across 1 tracked institutions, 1 increased. Net positioning is net buying.
- Mason Hawkins — Southeastern Asset Management ($126.4M) (▲ 20.3% qoq shares) · avg cost $16.49
Whale cost basis vs current price
The aggregate tracked cost basis is $16.49 versus a current price of $13.59, so ACI trades below its cost basis (-17.6%). Average unrealized P&L across tracked holders: 3%.
Sector positioning — Other
ACI sits within the Other sector alongside 670 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 ACI dashboard for price charts and cross-investor scans, or read the SEC 13F guide.
Related stock holder pages
- RYN whale holders — RAYONIER INC
- MAT whale holders — MATTEL INC
- IAC whale holders — IAC INC
- CNX whale holders — CNX RES CORP
- REGN whale holders — REGENERON PHARMACEUTICALS
- KHC whale holders — KRAFT HEINZ CO
- FDX whale holders — FEDEX CORP
- FBIN whale holders — FORTUNE BRANDS INNOVATIONS I
Learn more in Whale Analyzer Academy
Deepen your read on ACI with these Whale Analyzer Academy guides:
Frequently asked questions
Who owns ACI stock?
Whale Analyzer tracks 1 public institutional holders of ACI with a combined reported value of $126.4M. See the holder table above for the largest tracked positions.
Which top funds are buying ACI?
Tracked institutions were net buying last quarter — 1 increased. Check the "Change" column: "New" = fresh position, "Increased" = added, "Reduced" = trimmed.
How concentrated is ACI ownership?
The top five tracked holders report 100.0% of aggregate ownership.
Is ACI above or below the whale cost basis?
The aggregate tracked cost basis is $16.49 versus a current price of $13.59 (-17.6%).
What does 13F ownership mean for ACI?
Use the interactive ACI dashboard on Whale Analyzer for real-time holder analysis, or read our 13F Alpha Signals Guide.