Who owns ALK (ALK)
Which tracked institutional funds hold ALK, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See ALK company fundamentals →
Ownership as of the 2026-Q1 13F filings. 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
74 tracked funds added or opened ALK while 176 trimmed or exited it between 2025-Q4 and 2026-Q1 — the tape is split. When large holders disagree on a name, the funds moving first are sometimes ahead of the story.
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
ALK’s largest tracked holder by dollar value, VANGUARD GROUP 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 ALK more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in ALK 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 2025-Q4 and 2026-Q1, across 449 tracked filers holding ALK, 240 increased or opened the position and 240 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 ALK between the 2025-Q4 and 2026-Q1 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 34
- VANGUARD PORTFOLIO MANAGEMENT LLC$190M
- VANGUARD CAPITAL MANAGEMENT LLC$186M
- DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main$162M
- Capital World Investors$130M
- VANGUARD FIDUCIARY TRUST CO$26M
- Wolf Hill Capital Management, LP$12M
Full exits 42
- VANGUARD GROUP INC$550M
- Balyasny Asset Management L.P.$90M
- Jain Global LLC$54M
- ARGA Investment Management, LP$38M
- TWO SIGMA ADVISERS, LP$35M
- J. Goldman & Co LP$19M
Largest adds
- MARSHALL WACE, LLP$63M
- SEMPER AUGUSTUS INVESTMENTS GROUP LLC$42M
- MILLENNIUM MANAGEMENT LLC$24M
- CAUSEWAY CAPITAL MANAGEMENT LLC$20M
- NORGES BANK$16M
- Privium Fund Management (UK) Ltd$12M
Largest trims
- FMR LLC$200M
- BlackRock, Inc.$160M
- Capital Research Global Investors$142M
- CITADEL ADVISORS LLC$97M
- DIMENSIONAL FUND ADVISORS LP$79M
- Point72 Asset Management, L.P.$77M
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. trimmed | 10,039,809 | $369M | 8.0% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP added | 6,348,163 | $233M | 5.1% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 5,158,704 | $190M | 4.1% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 5,050,588 | $186M | 4.0% | 2026-Q1 |
| AMERICAN CENTURY COMPANIES INC added | 4,938,746 | $182M | 3.9% | 2026-Q1 |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main new | 4,397,882 | $162M | 3.5% | 2026-Q1 |
| Capital World Investors added | 3,529,999 | $130M | 2.8% | 2026-Q1 |
| STATE STREET CORP added | 3,483,934 | $128M | 2.8% | 2026-Q1 |
| FMR LLC trimmed | 3,427,930 | $126M | 2.7% | 2026-Q1 |
| FRONTIER CAPITAL MANAGEMENT CO LLC added | 3,373,587 | $124M | 2.7% | 2026-Q1 |
| PRIMECAP MANAGEMENT CO/CA/ trimmed | 3,250,329 | $120M | 2.6% | 2026-Q1 |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ trimmed | 2,869,970 | $106M | 2.3% | 2026-Q1 |
| MORGAN STANLEY added | 2,799,367 | $103M | 2.2% | 2026-Q1 |
| CAUSEWAY CAPITAL MANAGEMENT LLC added | 2,502,211 | $92M | 2.0% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC trimmed | 2,149,756 | $79M | 1.7% | 2026-Q1 |
| MARSHALL WACE, LLP added | 1,969,190 | $72M | 1.6% | 2026-Q1 |
| SEMPER AUGUSTUS INVESTMENTS GROUP LLC added | 1,695,062 | $62M | 1.4% | 2026-Q1 |
| UBS Group AG added | 1,664,846 | $61M | 1.3% | 2026-Q1 |
| PAR CAPITAL MANAGEMENT INC | 1,581,500 | $58M | 1.3% | 2026-Q1 |
| AMERIPRISE FINANCIAL INC trimmed | 1,424,688 | $52M | 1.1% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 1,263,002 | $46M | 1.0% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC added | 1,113,502 | $41M | 0.9% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ trimmed | 965,492 | $36M | 0.8% | 2026-Q1 |
| NORTHERN TRUST CORP trimmed | 902,799 | $33M | 0.7% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 894,886 | $33M | 0.7% | 2026-Q1 |
| CITADEL ADVISORS LLC trimmed | 831,666 | $31M | 0.7% | 2026-Q1 |
| Bank of New York Mellon Corp added | 726,033 | $27M | 0.6% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 715,704 | $26M | 0.6% | 2026-Q1 |
| NORGES BANK added | 501,977 | $25M | 0.5% | 2026-Q1 |
| BARCLAYS PLC trimmed | 617,667 | $23M | 0.5% | 2026-Q1 |
| U S GLOBAL INVESTORS INC added | 596,572 | $22M | 0.5% | 2026-Q1 |
| FRANKLIN RESOURCES INC trimmed | 578,608 | $21M | 0.5% | 2026-Q1 |
| Lodge Hill Capital, LLC added | 507,800 | $19M | 0.4% | 2026-Q1 |
| JPMORGAN CHASE & CO trimmed | 533,672 | $18M | 0.4% | 2026-Q1 |
| Baird Financial Group, Inc. added | 485,967 | $18M | 0.4% | 2026-Q1 |
| Capital Research Global Investors trimmed | 475,350 | $17M | 0.4% | 2026-Q1 |
| MetLife Investment Management, LLC added | 457,084 | $17M | 0.4% | 2026-Q1 |
| South Dakota Investment Council added | 448,271 | $16M | 0.4% | 2026-Q1 |
| RHUMBLINE ADVISERS added | 426,199 | $16M | 0.3% | 2026-Q1 |
| Invesco Ltd. trimmed | 412,297 | $15M | 0.3% | 2026-Q1 |
| Point72 Asset Management, L.P. trimmed | 410,656 | $15M | 0.3% | 2026-Q1 |
| STIFEL FINANCIAL CORP trimmed | 386,730 | $14M | 0.3% | 2026-Q1 |
| Privium Fund Management (UK) Ltd added | 351,333 | $13M | 0.3% | 2026-Q1 |
| Wolf Hill Capital Management, LP new | 339,183 | $12M | 0.3% | 2026-Q1 |
| CAPITAL FUND MANAGEMENT S.A. trimmed | 333,355 | $12M | 0.3% | 2026-Q1 |
| LSV ASSET MANAGEMENT trimmed | 329,199 | $12M | 0.3% | 2026-Q1 |
| Private Advisory Group LLC added | 270,007 | $10M | 0.2% | 2026-Q1 |
| PRINCIPAL FINANCIAL GROUP INC added | 269,736 | $10M | 0.2% | 2026-Q1 |
| DELTEC ASSET MANAGEMENT LLC added | 269,600 | $10M | 0.2% | 2026-Q1 |
| Allspring Global Investments Holdings, LLC added | 255,786 | $10M | 0.2% | 2026-Q1 |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC trimmed | 258,191 | $9M | 0.2% | 2026-Q1 |
| CenterBook Partners LP added | 258,186 | $9M | 0.2% | 2026-Q1 |
| LPL Financial LLC added | 239,456 | $9M | 0.2% | 2026-Q1 |
| Retirement Systems of Alabama added | 236,390 | $9M | 0.2% | 2026-Q1 |
| Atom Investors LP added | 229,238 | $8M | 0.2% | 2026-Q1 |
| RAYMOND JAMES FINANCIAL INC added | 226,502 | $8M | 0.2% | 2026-Q1 |
| ALLIANCEBERNSTEIN L.P. trimmed | 158,666 | $8M | 0.2% | 2026-Q1 |
| Nuveen, LLC added | 215,428 | $8M | 0.2% | 2026-Q1 |
| D.A. DAVIDSON & CO. added | 211,016 | $8M | 0.2% | 2026-Q1 |
| FIFTH THIRD BANCORP added | 209,850 | $8M | 0.2% | 2026-Q1 |
| Qube Research & Technologies Ltd added | 206,642 | $8M | 0.2% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS trimmed | 202,415 | $7M | 0.2% | 2026-Q1 |
| ExodusPoint Capital Management, LP added | 200,757 | $7M | 0.2% | 2026-Q1 |
| Generate Investment Management Ltd trimmed | 200,000 | $7M | 0.2% | 2026-Q1 |
| Schonfeld Strategic Advisors LLC added | 199,669 | $7M | 0.2% | 2026-Q1 |
| LANDSCAPE CAPITAL MANAGEMENT, L.L.C. added | 198,619 | $7M | 0.2% | 2026-Q1 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 198,009 | $7M | 0.2% | 2026-Q1 |
| Rockefeller Capital Management L.P. added | 192,890 | $7M | 0.2% | 2026-Q1 |
| swisspartners Advisors Ltd added | 193,540 | $7M | 0.2% | 2026-Q1 |
| FIRST TRUST ADVISORS LP trimmed | 191,504 | $7M | 0.2% | 2026-Q1 |
| JANE STREET GROUP, LLC trimmed | 187,428 | $7M | 0.1% | 2026-Q1 |
| HSBC HOLDINGS PLC added | 187,496 | $7M | 0.1% | 2026-Q1 |
| XTX Topco Ltd added | 178,629 | $7M | 0.1% | 2026-Q1 |
| Black Maple Capital Management LP added | 172,600 | $6M | 0.1% | 2026-Q1 |
| VANGUARD GROUP INC trimmed | 10,930,693 | $550M | 11.9% | 2025-Q4 stale |
| D1 Capital Partners L.P. trimmed | 2,338,340 | $116M | 2.5% | 2025-Q3 stale |
| Balyasny Asset Management L.P. added | 1,787,099 | $90M | 1.9% | 2025-Q4 stale |
| Jain Global LLC added | 1,067,255 | $54M | 1.2% | 2025-Q4 stale |
| HENNESSY ADVISORS INC trimmed | 1,044,800 | $52M | 1.1% | 2025-Q2 stale |
| ARGA Investment Management, LP added | 754,321 | $38M | 0.8% | 2025-Q4 stale |
| TWO SIGMA ADVISERS, LP added | 687,900 | $35M | 0.7% | 2025-Q4 stale |
| Squarepoint Ops LLC added | 660,542 | $33M | 0.7% | 2025-Q2 stale |
| Assenagon Asset Management S.A. added | 624,035 | $31M | 0.7% | 2025-Q2 stale |
| J. Goldman & Co LP added | 386,094 | $19M | 0.4% | 2025-Q4 stale |
| Candlestick Capital Management LP trimmed | 361,928 | $18M | 0.4% | 2025-Q3 stale |
| DIAMOND HILL CAPITAL MANAGEMENT INC added | 287,930 | $14M | 0.3% | 2025-Q4 stale |
| SummitTX Capital, L.P. added | 272,524 | $14M | 0.3% | 2025-Q4 stale |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC trimmed | 272,120 | $14M | 0.3% | 2025-Q3 stale |
| COBALT CAPITAL MANAGEMENT, INC. added | 260,000 | $13M | 0.3% | 2025-Q4 stale |
| Man Group plc added | 261,262 | $13M | 0.3% | 2025-Q3 stale |
| SOROS FUND MANAGEMENT LLC added | 186,448 | $9M | 0.2% | 2025-Q1 stale |
| COMERICA BANK trimmed | 160,298 | $8M | 0.2% | 2025-Q4 stale |
| MAPLELANE CAPITAL, LLC new | 155,000 | $8M | 0.2% | 2025-Q1 stale |
| NFJ INVESTMENT GROUP, LLC trimmed | 152,819 | $8M | 0.2% | 2025-Q3 stale |
| AGF MANAGEMENT LTD trimmed | 149,075 | $7M | 0.2% | 2025-Q3 stale |
| Shellback Capital, LP trimmed | 140,000 | $7M | 0.2% | 2025-Q4 stale |
| HRT FINANCIAL LP added | 137,538 | $7M | 0.1% | 2025-Q4 stale |
| Corebridge Financial, Inc. added | 135,942 | $7M | 0.1% | 2025-Q1 stale |
| TOWLE & CO trimmed | 132,291 | $7M | 0.1% | 2025-Q4 stale |
| Davidson Kempner Capital Management LP new | 125,000 | $6M | 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.