Kaiser Aluminum Corporation (KALU) Ownership
KALU ownership summary
as of October 18, 2026- Institutions
- 103.4% of shares outstanding
- Insiders
- 1.48% of shares outstanding
- Shares outstanding
- 16.3M
- Float
- 16.0M shares available to trade
- Short interest
- 7.08% 958K shares short
- Days to cover
- 4.23 short interest up 1.3% vs prior month
- Institutions 103.42%
- Insiders 1.48%
KALU top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 17.56% | 2.9M | $422.7M | +27,694 (+1.0%) | June 30, 2026 |
| 2 | Vanguard Portfolio Management, LLC | 8.64% | 1.4M | $208.1M | +104,420 (+8.0%) | June 30, 2026 |
| 3 | State Street Corp | 8.06% | 1.3M | $194.0M | −15,404 (−1.2%) | June 30, 2026 |
| 4 | Dimensional Fund Advisors, Inc. | 4.75% | 776K | $114.3M | −42,370 (−5.2%) | June 30, 2026 |
| 5 | Vanguard Capital Management, LLC | 4.33% | 707K | $104.1M | +37,393 (+5.6%) | June 30, 2026 |
| 6 | Delaware Management Holdings Inc | 4.16% | 679K | $100.0M | −34,789 (−4.9%) | June 30, 2026 |
| 7 | Geode Capital Management, LLC | 2.89% | 472K | $69.5M | +67,738 (+16.8%) | June 30, 2026 |
| 8 | American Century Companies Inc | 2.69% | 440K | $64.8M | −38,873 (−8.1%) | June 30, 2026 |
| 9 | Barrow Hanley Mewhinney & Strauss LLC | 2.56% | 419K | $61.7M | −111,621 (−21.0%) | June 30, 2026 |
| 10 | Fisher Asset Management, LLC | 2.16% | 353K | $51.9M | +48,254 (+15.8%) | June 30, 2026 |
| 11 | Arnhold & S. Bleichroeder Advisers, LLC | 1.69% | 277K | $40.8M | +166,101 (+150.0%) | June 30, 2026 |
| 12 | Franklin Templeton Inc | 1.67% | 272K | $40.1M | +266,026 (+4,181.5%) | June 30, 2026 |
| 13 | Charles Schwab Investment Management Inc | 1.59% | 260K | $38.3M | −20,882 (−7.4%) | June 30, 2026 |
| 14 | Amvescap Plc. | 1.57% | 256K | $37.7M | −12,416 (−4.6%) | June 30, 2026 |
| 15 | Systematic Financial Management LP | 1.42% | 232K | $34.2M | −10,755 (−4.4%) | June 30, 2026 |
| 16 | The Goldman Sachs Group Inc | 1.39% | 227K | $33.5M | +73,481 (+47.7%) | June 30, 2026 |
| 17 | Bank of New York Mellon Corp | 1.20% | 196K | $28.9M | −638 (−0.3%) | June 30, 2026 |
| 18 | Morgan Stanley - Brokerage Accounts | 1.19% | 195K | $28.7M | +22,497 (+13.1%) | June 30, 2026 |
| 19 | Northern Trust Corp | 1.14% | 186K | $27.4M | +11,431 (+6.5%) | June 30, 2026 |
| 20 | Wellington Management Company LLP | 1.09% | 179K | $26.3M | −153,440 (−46.2%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 10 holders added 825K shares and 10 cut 441K.
KALU top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | iShares Core S&P Small-Cap ETF | 5.90% | 964K | $142.0M | +228 (+0.0%) | September 30, 2026 |
| 2 | Stt Strt®SPDR®S&P®Mtls &MngETF | 3.73% | 610K | $89.8M | +6,168 (+1.0%) | September 30, 2026 |
| 3 | Vanguard MStar Total Stk Mkt Idx Invest | 3.02% | 494K | $72.8M | −816 (−0.2%) | August 31, 2026 |
| 4 | Nomura Small Cap Core I | 2.78% | 455K | $66.9M | — | August 31, 2026 |
| 5 | iShares Russell 2000 ETF | 2.62% | 429K | $63.1M | −4,928 (−1.1%) | September 30, 2026 |
| 6 | Vanguard Small Cap Index | 2.18% | 357K | $52.6M | −42 (−0.0%) | August 31, 2026 |
| 7 | Avantis US Small Cap Value ETF | 2.00% | 327K | $48.2M | — | September 30, 2026 |
| 8 | Vanguard MStar Small Cap Value Index | 1.39% | 227K | $33.4M | +172 (+0.1%) | August 31, 2026 |
| 9 | Fidelity Small Cap Index | 1.11% | 181K | $26.6M | +1,668 (+0.9%) | July 31, 2026 |
| 10 | Putnam Small Cap Growth A | 0.99% | 162K | $23.9M | — | August 31, 2026 |
| 11 | Vanguard Strategic Equity Inv | 0.95% | 155K | $22.8M | +46,257 (+42.5%) | June 30, 2026 |
| 12 | iShares Russell 2000 Growth ETF | 0.95% | 155K | $22.8M | −196 (−0.1%) | September 30, 2026 |
| 13 | State Street SPDR Port S&P 600 Sm CpETF | 0.91% | 148K | $21.8M | — | September 30, 2026 |
| 14 | iShares S&P Small-Cap 600 Value ETF | 0.84% | 137K | $20.2M | — | September 30, 2026 |
| 15 | Vanguard Explorer Inv | 0.78% | 127K | $18.8M | — | June 30, 2026 |
| 16 | First Eagle Small Cap Opportunity I | 0.78% | 127K | $18.7M | — | August 31, 2026 |
| 17 | DFA US Targeted Value I | 0.77% | 125K | $18.4M | +21,305 (+20.5%) | August 31, 2026 |
| 18 | BlackRock Advantage Small Cap Core Instl | 0.72% | 117K | $17.2M | — | August 31, 2026 |
| 19 | Invesco S&P SmallCap Momentum ETF | 0.67% | 109K | $16.0M | — | September 30, 2026 |
| 20 | Vanguard Tax-Managed Small Cap Adm | 0.60% | 97K | $14.3M | — | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
KALU insider transactions
latest 2| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-02-23 | Neal E West | Sell | $121.72 | 5,000 | $608,600 |
| 2025-11-07 | Blain Tiffany | Sell | $93.92 | 8,656 | $812,972 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
KALU shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns KALU
Institutional investors own 103.4% of Kaiser Aluminum's shares and insiders 1.48%. The largest holder is BlackRock Inc with 17.56% of the shares (2.9M), as of June 30, 2026. Among the top 20 institutions, 10 added shares and 10 reduced their stake in the latest filings. Short interest is 7.08% of the float, or 4.23 days of average trading volume. The share count fell 8.8% since 2014.
Related: KALU analyst forecast, KALU key metrics, KALU dividend history. See the KALU stock overview for the latest quote and news.
KALU ownership FAQ
Who owns the most Kaiser Aluminum stock?
The largest shareholders of Kaiser Aluminum are BlackRock Inc (17.56%), Vanguard Portfolio Management, LLC (8.64%), State Street Corp (8.06%), Dimensional Fund Advisors, Inc. (4.75%), Vanguard Capital Management, LLC (4.33%).
What percentage of Kaiser Aluminum is owned by institutions?
Institutions hold 103.4% of Kaiser Aluminum's shares outstanding; insiders hold 1.48%.
Which funds own Kaiser Aluminum?
The largest fund holders of Kaiser Aluminum are iShares Core S&P Small-Cap ETF (5.90%), Stt Strt®SPDR®S&P®Mtls &MngETF (3.73%), Vanguard MStar Total Stk Mkt Idx Invest (3.02%), Nomura Small Cap Core I (2.78%), iShares Russell 2000 ETF (2.62%).
What is Kaiser Aluminum's short interest?
958K shares of Kaiser Aluminum were sold short, 7.08% of the float; at the average daily volume it would take 4.23 days to cover.
Are insiders buying or selling Kaiser Aluminum?
Of the latest 2 reported insider transactions in Kaiser Aluminum (since November 7, 2025), 0 were purchases and 2 were sales.
How many shares of Kaiser Aluminum are outstanding?
Kaiser Aluminum has 16.3M shares outstanding, of which 16.0M are in the public float.