Who owns Kaiser Aluminum (KALU)
Which tracked institutional funds hold KALU, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See KALU company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-08-24). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on KALU is one-sided between 2026-Q1 and 2026-Q2: 152 added or opened and 39 trimmed or exited — on balance accumulating.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
KALU’s largest tracked holder by dollar value, BlackRock, Inc., sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.0pp gap the other way — the median holder sizes KALU more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in KALU divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 311 tracked filers holding KALU, 184 increased or opened the position and 146 reduced or closed it; over the same quarter, open-market insider Form 4 buying and selling roughly offset.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in KALU between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 25
- Sixth Street Partners Management Company, L.P.$51M
- WESTFIELD CAPITAL MANAGEMENT CO LP$32M
- Assenagon Asset Management S.A.$11M
- HENNESSY ADVISORS INC$11M
- Jupiter Topco LLC$6M
- LAZARD ASSET MANAGEMENT LLC$3M
Full exits 23
- BRIGHTLINE CAPITAL MANAGEMENT, LLC$21M
- CANADA LIFE ASSURANCE Co$14M
- WINSLOW ASSET MANAGEMENT INC$9M
- Covalis Capital LLP$8M
- BESSEMER GROUP INC$4M
- Point72 Asset Management, L.P.$3M
Largest adds
- BlackRock, Inc.$349M
- VANGUARD PORTFOLIO MANAGEMENT LLC$119M
- STATE STREET CORP$97M
- VANGUARD CAPITAL MANAGEMENT LLC$58M
- DIMENSIONAL FUND ADVISORS LP$53M
- FRANKLIN RESOURCES INC$53M
Largest trims
- ARROWSTREET CAPITAL, LIMITED PARTNERSHIP$17M
- Tributary Capital Management, LLC$6M
- NFJ INVESTMENT GROUP, LLC$6M
- Qube Research & Technologies Ltd$6M
- WELLINGTON MANAGEMENT GROUP LLP$4M
- MILLENNIUM MANAGEMENT LLC$3M
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. added | 2,870,588 | $562M | 16.4% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC added | 1,413,170 | $276M | 8.1% | 2026-Q2 |
| STATE STREET CORP trimmed | 1,317,519 | $258M | 7.5% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP trimmed | 775,944 | $152M | 4.4% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 707,161 | $138M | 4.0% | 2026-Q2 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. trimmed | 679,387 | $133M | 3.9% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 471,735 | $92M | 2.7% | 2026-Q2 |
| AMERICAN CENTURY COMPANIES INC trimmed | 439,923 | $86M | 2.5% | 2026-Q2 |
| BARROW HANLEY MEWHINNEY & STRAUSS LLC trimmed | 419,050 | $82M | 2.4% | 2026-Q2 |
| Fisher Asset Management, LLC added | 352,761 | $69M | 2.0% | 2026-Q2 |
| FRANKLIN RESOURCES INC added | 272,388 | $53M | 1.6% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 259,873 | $51M | 1.5% | 2026-Q2 |
| Sixth Street Partners Management Company, L.P. new | 259,873 | $51M | 1.5% | 2026-Q2 |
| Invesco Ltd. added | 256,161 | $50M | 1.5% | 2026-Q2 |
| SYSTEMATIC FINANCIAL MANAGEMENT LP trimmed | 232,240 | $45M | 1.3% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC added | 227,467 | $44M | 1.3% | 2026-Q2 |
| Bank of New York Mellon Corp trimmed | 196,048 | $38M | 1.1% | 2026-Q2 |
| MORGAN STANLEY added | 194,659 | $38M | 1.1% | 2026-Q2 |
| NORTHERN TRUST CORP added | 185,992 | $36M | 1.1% | 2026-Q2 |
| WELLINGTON MANAGEMENT GROUP LLP trimmed | 178,672 | $35M | 1.0% | 2026-Q2 |
| Nuveen, LLC added | 173,822 | $34M | 1.0% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ trimmed | 170,173 | $33M | 1.0% | 2026-Q2 |
| WESTFIELD CAPITAL MANAGEMENT CO LP new | 163,465 | $32M | 0.9% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP added | 156,166 | $31M | 0.9% | 2026-Q2 |
| First Eagle Investment Management, LLC added | 138,431 | $27M | 0.8% | 2026-Q2 |
| ALGERT GLOBAL LLC added | 125,576 | $25M | 0.7% | 2026-Q2 |
| PANAGORA ASSET MANAGEMENT INC added | 124,915 | $24M | 0.7% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 115,624 | $23M | 0.7% | 2026-Q2 |
| JANE STREET GROUP, LLC added | 108,370 | $21M | 0.6% | 2026-Q2 |
| PRINCIPAL FINANCIAL GROUP INC added | 105,510 | $21M | 0.6% | 2026-Q2 |
| MACKENZIE FINANCIAL CORP added | 100,812 | $20M | 0.6% | 2026-Q2 |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC trimmed | 100,434 | $20M | 0.6% | 2026-Q2 |
| D. E. Shaw & Co., Inc. added | 100,368 | $20M | 0.6% | 2026-Q2 |
| FIRST TRUST ADVISORS LP added | 91,215 | $18M | 0.5% | 2026-Q2 |
| VICTORY CAPITAL MANAGEMENT INC added | 86,838 | $17M | 0.5% | 2026-Q2 |
| Trexquant Investment LP added | 81,259 | $16M | 0.5% | 2026-Q2 |
| HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC trimmed | 76,830 | $15M | 0.4% | 2026-Q2 |
| Tributary Capital Management, LLC trimmed | 75,731 | $15M | 0.4% | 2026-Q2 |
| PRUDENTIAL FINANCIAL INC added | 66,075 | $13M | 0.4% | 2026-Q2 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP trimmed | 64,176 | $13M | 0.4% | 2026-Q2 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND added | 58,296 | $11M | 0.3% | 2026-Q2 |
| Public Sector Pension Investment Board trimmed | 55,592 | $11M | 0.3% | 2026-Q2 |
| Assenagon Asset Management S.A. trimmed | 54,484 | $11M | 0.3% | 2026-Q2 |
| HENNESSY ADVISORS INC new | 54,400 | $11M | 0.3% | 2026-Q2 |
| UBS Group AG trimmed | 53,035 | $10M | 0.3% | 2026-Q2 |
| Empowered Funds, LLC trimmed | 52,900 | $10M | 0.3% | 2026-Q2 |
| NORGES BANK added | 46,500 | $9M | 0.3% | 2026-Q2 |
| NFJ INVESTMENT GROUP, LLC trimmed | 46,404 | $9M | 0.3% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS added | 45,337 | $9M | 0.3% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 43,841 | $9M | 0.3% | 2026-Q2 |
| SEI INVESTMENTS CO trimmed | 43,687 | $9M | 0.2% | 2026-Q2 |
| RHUMBLINE ADVISERS trimmed | 43,374 | $8M | 0.2% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC added | 42,224 | $8M | 0.2% | 2026-Q2 |
| Allspring Global Investments Holdings, LLC added | 44,247 | $8M | 0.2% | 2026-Q2 |
| ICON ADVISERS INC/CO trimmed | 41,382 | $8M | 0.2% | 2026-Q2 |
| GREAT LAKES ADVISORS, LLC trimmed | 41,124 | $8M | 0.2% | 2026-Q2 |
| 1492 Capital Management LLC trimmed | 38,985 | $8M | 0.2% | 2026-Q2 |
| PDT Partners, LLC added | 38,588 | $8M | 0.2% | 2026-Q2 |
| ENVESTNET ASSET MANAGEMENT INC trimmed | 37,761 | $7M | 0.2% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC trimmed | 37,374 | $7M | 0.2% | 2026-Q2 |
| Russell Investments Group, Ltd. added | 36,851 | $7M | 0.2% | 2026-Q2 |
| XTX Topco Ltd added | 35,805 | $7M | 0.2% | 2026-Q2 |
| Legal & General Group Plc added | 35,569 | $7M | 0.2% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN added | 34,004 | $7M | 0.2% | 2026-Q2 |
| Jump Financial, LLC added | 33,505 | $7M | 0.2% | 2026-Q2 |
| Jupiter Topco LLC new | 33,063 | $6M | 0.2% | 2026-Q2 |
| Swiss National Bank added | 32,500 | $6M | 0.2% | 2026-Q2 |
| THIRD AVENUE MANAGEMENT LLC trimmed | 29,848 | $6M | 0.2% | 2026-Q2 |
| ROYAL BANK OF CANADA added | 27,825 | $5M | 0.2% | 2026-Q2 |
| CREDIT AGRICOLE S A added | 27,500 | $5M | 0.2% | 2026-Q2 |
| FMR LLC added | 27,158 | $5M | 0.2% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 22,489 | $4M | 0.1% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC trimmed | 21,626 | $4M | 0.1% | 2026-Q2 |
| JPMORGAN CHASE & CO trimmed | 21,173 | $4M | 0.1% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM trimmed | 20,127 | $4M | 0.1% | 2026-Q2 |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 19,600 | $4M | 0.1% | 2026-Q2 |
| Man Group plc added | 17,955 | $4M | 0.1% | 2026-Q2 |
| CITIGROUP INC added | 17,551 | $3M | 0.1% | 2026-Q2 |
| DEUTSCHE BANK AG\ added | 17,190 | $3M | 0.1% | 2026-Q2 |
| VANGUARD ASSET MANAGEMENT, Ltd added | 15,874 | $3M | 0.1% | 2026-Q2 |
| HSBC HOLDINGS PLC added | 15,827 | $3M | 0.1% | 2026-Q2 |
| Connor, Clark & Lunn Investment Management Ltd. added | 14,987 | $3M | 0.1% | 2026-Q2 |
| COOKSON PEIRCE & CO INC added | 14,825 | $3M | 0.1% | 2026-Q2 |
| BANK OF MONTREAL /CAN/ added | 14,482 | $3M | 0.1% | 2026-Q2 |
| Universal- Beteiligungs- und Servicegesellschaft mbH trimmed | 14,237 | $3M | 0.1% | 2026-Q2 |
| Oliver Luxxe Assets LLC trimmed | 13,231 | $3M | 0.1% | 2026-Q2 |
| VANGUARD GROUP INC added | 2,117,791 | $243M | 7.1% | 2025-Q4 stale |
| MACQUARIE GROUP LTD added | 1,011,440 | $78M | 2.3% | 2025-Q3 stale |
| BRIGHTLINE CAPITAL MANAGEMENT, LLC added | 175,000 | $21M | 0.6% | 2026-Q1 stale |
| CANADA LIFE ASSURANCE Co added | 112,506 | $14M | 0.4% | 2026-Q1 stale |
| WINSLOW ASSET MANAGEMENT INC trimmed | 74,003 | $9M | 0.3% | 2026-Q1 stale |
| Covalis Capital LLP new | 69,667 | $8M | 0.2% | 2026-Q1 stale |
| Informed Momentum Co LLC new | 43,017 | $5M | 0.1% | 2025-Q4 stale |
| Keeley-Teton Advisors, LLC trimmed | 73,569 | $4M | 0.1% | 2025-Q1 stale |
| MARSHALL WACE, LLP added | 34,225 | $4M | 0.1% | 2025-Q4 stale |
| BESSEMER GROUP INC trimmed | 29,915 | $4M | 0.1% | 2026-Q1 stale |
| SummitTX Capital, L.P. new | 41,627 | $3M | 0.1% | 2025-Q2 stale |
| Point72 Asset Management, L.P. trimmed | 26,194 | $3M | 0.1% | 2026-Q1 stale |
| Bastion Asset Management Inc. added | 38,818 | $3M | 0.1% | 2025-Q2 stale |
| Jackson Creek Investment Advisors LLC trimmed | 23,860 | $3M | 0.1% | 2025-Q4 stale |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.