Whale Analyzer
KLAC Institutional Holders and 13F Ownership
Compare 8 tracked holders of KLAC, 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. PRIMECAP Management is the largest reported holder at $6.20B; the top five funds control 99.0% of reported ownership; institutions were net buying last quarter (8 increased, 0 reduced); the stock trades below the aggregate whale cost basis of $250.22. Top tracked holders include PRIMECAP Management, Capital Group, NPS Korea, and Baillie Gifford.
Continue to the live KLAC dashboardTop holders
| Investor | Reported value | Shares | Change | Report date |
|---|---|---|---|---|
| PRIMECAP Management 13F portfolio PRIMECAP Management Company holdings | $6.20B | 20.5M | Increased | 2026-06-30 |
| Capital Group 13F portfolio Capital Research Global Investors holdings | $2.94B | 9.7M | Increased | 2026-06-30 |
| NPS Korea 13F portfolio National Pension Service holdings | $1.10B | 3.6M | Increased | 2026-06-30 |
| Baillie Gifford 13F portfolio Baillie Gifford & Co holdings | $285.6M | 946.6K | New | 2026-06-30 |
| Brad Gerstner 13F portfolio Altimeter Capital holdings | $174.5M | 578.2K | New | 2026-06-30 |
| Ray Dalio 13F portfolio Bridgewater Associates holdings | $99.0M | 328.1K | Increased | 2026-06-30 |
| Horizon Kinetics 13F portfolio Horizon Kinetics Asset Management holdings | $6.0M | 19.9K | Increased | 2026-06-30 |
| Lee Ainslie 13F portfolio Maverick Capital holdings | $1.7M | 5.6K | New | 2026-06-30 |
Ownership concentration
Reported ownership of KLAC is highly concentrated across tracked institutions.
- Single largest holder: 57.4% of reported ownership
- Top 5 holders: 99.0%
- Top 10 holders: 100.0%
Whale activity this quarter
Across 8 tracked institutions, 8 increased. Net positioning is net buying.
- PRIMECAP Management — PRIMECAP Management Company ($6.20B) (▲ 742.5% qoq shares)
- Capital Group — Capital Research Global Investors ($2.94B) (▲ 898.3% qoq shares) · avg cost $277.94
- NPS Korea — National Pension Service ($1.10B) (▲ 899.4% qoq shares) · avg cost $187.81
- Baillie Gifford — Baillie Gifford & Co ($285.6M) · avg cost $174.06
- Brad Gerstner — Altimeter Capital ($174.5M) · avg cost $174.06
- Ray Dalio — Bridgewater Associates ($99.0M) (▲ 201.9% qoq shares) · avg cost $483.75
- Horizon Kinetics — Horizon Kinetics Asset Management ($6.0M) (▲ 820.1% qoq shares) · avg cost $83.43
- Lee Ainslie — Maverick Capital ($1.7M) · avg cost $146.71
Whale cost basis vs current price
The aggregate tracked cost basis is $250.22 versus a current price of $180.64, so KLAC trades below its cost basis (-27.8%). Average unrealized P&L across tracked holders: 6%.
Sector positioning — Information Technology
KLAC sits within the Information Technology sector alongside 135 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 KLAC 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 KLAC with these Whale Analyzer Academy guides:
Frequently asked questions
Who owns KLAC stock?
Whale Analyzer tracks 8 public institutional holders of KLAC with a combined reported value of $10.80B. See the holder table above for the largest tracked positions.
Which top funds are buying KLAC?
Tracked institutions were net buying last quarter — 8 increased. Check the "Change" column: "New" = fresh position, "Increased" = added, "Reduced" = trimmed.
How concentrated is KLAC ownership?
The top five tracked holders report 99.0% of aggregate ownership.
Is KLAC above or below the whale cost basis?
The aggregate tracked cost basis is $250.22 versus a current price of $180.64 (-27.8%).
What does 13F ownership mean for KLAC?
These are historical reported positions from tracked filers, not real-time ownership or a complete shareholder register. Use the interactive KLAC dashboard to explore them, or read our 13F Alpha Signals Guide.