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KALU · Kaiser Aluminum Corp

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Market Cap
$2.56B
Shares
16.35M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 337
Total Value: $3,228,162,052
Total Shares: 16,504,161
Showing 1–100 of 344 holdings by value · page 1 of 4

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 337 13F filers · Δ vs Mar 31, 2026
Top Holder
17.4%
Sep 2023 → Jun 2026 · range 16.6% – 20.1%
−0.3 pts
Top 5
42.9%
Sep 2023 → Jun 2026 · range 42.9% – 53.3%
−0.8 pts
Top 10
57.3%
Sep 2023 → Jun 2026 · range 57.3% – 72.1%
−1.6 pts
HHI
554
Sep 2023 → Jun 2026 · range 554 – 792
Broadly held−21

Quarterly Activity

vs Mar 31, 2026
New
82
Increased
113
Decreased
104
Sold Out
33
Unchanged
38
Holder count: +49
Institutional value: +67.0%
Shares held: +2.9%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 344
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 811596 CUSIP 483007704 13F (30d) 271 filings 257 filers Visit website Investor relations