Who owns WAB (WAB)
Which tracked institutional funds hold WAB, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See WAB 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
The tracked-fund tape on WAB is one-sided between 2025-Q4 and 2026-Q1: 393 added or opened and 121 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
WAB’s largest tracked holder by dollar value, FMR LLC, sizes it at 0.3% of its own reported 13F book, while the median holder sizes it at 0.1% of theirs — a 0.2pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in WAB 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 1147 tracked filers holding WAB, 534 increased or opened the position and 498 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 WAB 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 51
- VANGUARD CAPITAL MANAGEMENT LLC$2.8B
- VANGUARD PORTFOLIO MANAGEMENT LLC$1.8B
- VANGUARD FIDUCIARY TRUST CO$240M
- Vanguard Global Advisers, LLC$93M
- VANGUARD ASSET MANAGEMENT, Ltd$69M
- TOMS Capital Investment Management LP$68M
Full exits 47
- VANGUARD GROUP INC$4.2B
- Junto Capital Management LP$116M
- BRISTOL JOHN W & CO INC /NY/$70M
- TWO SIGMA ADVISERS, LP$27M
- Channing Capital Management, LLC$17M
- Jain Global LLC$17M
Largest adds
- FMR LLC$892M
- STATE STREET CORP$300M
- PRICE T ROWE ASSOCIATES INC /MD/$300M
- GEODE CAPITAL MANAGEMENT, LLC$206M
- NORDEA INVESTMENT MANAGEMENT AB$204M
- MORGAN STANLEY$174M
Largest trims
- FARALLON CAPITAL MANAGEMENT LLC$126M
- BlackRock, Inc.$120M
- NORGES BANK$76M
- AustralianSuper Pty Ltd$70M
- BESSEMER GROUP INC$55M
- Varenne Capital Partners$51M
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 |
|---|---|---|---|---|
| FMR LLC added | 19,722,429 | $4.9B | 12.7% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 11,081,573 | $2.8B | 7.1% | 2026-Q1 |
| BlackRock, Inc. trimmed | 10,986,386 | $2.7B | 7.1% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 8,002,832 | $2.0B | 5.1% | 2026-Q1 |
| STATE STREET CORP added | 7,740,942 | $1.9B | 5.0% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 7,157,876 | $1.8B | 4.6% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 4,557,374 | $1.1B | 2.9% | 2026-Q1 |
| FIL Ltd trimmed | 3,501,941 | $875M | 2.2% | 2026-Q1 |
| NORDEA INVESTMENT MANAGEMENT AB added | 3,555,877 | $864M | 2.2% | 2026-Q1 |
| Select Equity Group, L.P. trimmed | 2,923,643 | $731M | 1.9% | 2026-Q1 |
| WELLINGTON MANAGEMENT GROUP LLP trimmed | 2,509,912 | $627M | 1.6% | 2026-Q1 |
| MORGAN STANLEY added | 2,462,739 | $615M | 1.6% | 2026-Q1 |
| Invesco Ltd. trimmed | 2,082,838 | $521M | 1.3% | 2026-Q1 |
| Boston Partners trimmed | 1,956,298 | $489M | 1.3% | 2026-Q1 |
| NORTHERN TRUST CORP trimmed | 1,725,133 | $431M | 1.1% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP trimmed | 1,725,361 | $431M | 1.1% | 2026-Q1 |
| Beutel, Goodman & Co Ltd. trimmed | 1,648,944 | $412M | 1.1% | 2026-Q1 |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ trimmed | 1,616,726 | $408M | 1.0% | 2026-Q1 |
| FARALLON CAPITAL MANAGEMENT LLC trimmed | 1,609,403 | $402M | 1.0% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC trimmed | 1,391,003 | $348M | 0.9% | 2026-Q1 |
| NORGES BANK trimmed | 1,837,179 | $333M | 0.9% | 2026-Q1 |
| AQR CAPITAL MANAGEMENT LLC trimmed | 1,342,550 | $328M | 0.8% | 2026-Q1 |
| JPMORGAN CHASE & CO added | 1,381,399 | $328M | 0.8% | 2026-Q1 |
| AMERICAN CENTURY COMPANIES INC added | 1,225,538 | $306M | 0.8% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 1,187,142 | $297M | 0.8% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 1,119,552 | $280M | 0.7% | 2026-Q1 |
| Amundi trimmed | 1,098,596 | $275M | 0.7% | 2026-Q1 |
| KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC added | 1,056,794 | $264M | 0.7% | 2026-Q1 |
| Nuveen, LLC added | 1,029,883 | $257M | 0.7% | 2026-Q1 |
| ROYAL LONDON ASSET MANAGEMENT LTD trimmed | 992,449 | $248M | 0.6% | 2026-Q1 |
| Legal & General Group Plc trimmed | 974,513 | $244M | 0.6% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 959,922 | $240M | 0.6% | 2026-Q1 |
| AVIVA PLC trimmed | 851,930 | $213M | 0.5% | 2026-Q1 |
| Assenagon Asset Management S.A. added | 851,733 | $213M | 0.5% | 2026-Q1 |
| DEUTSCHE BANK AG\ trimmed | 833,435 | $208M | 0.5% | 2026-Q1 |
| BANK OF MONTREAL /CAN/ trimmed | 821,182 | $205M | 0.5% | 2026-Q1 |
| Bank of New York Mellon Corp trimmed | 793,982 | $198M | 0.5% | 2026-Q1 |
| UBS Group AG trimmed | 781,091 | $195M | 0.5% | 2026-Q1 |
| RAYMOND JAMES FINANCIAL INC trimmed | 749,823 | $181M | 0.5% | 2026-Q1 |
| BESSEMER GROUP INC trimmed | 717,387 | $179M | 0.5% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ added | 667,699 | $167M | 0.4% | 2026-Q1 |
| Alyeska Investment Group, L.P. trimmed | 619,978 | $155M | 0.4% | 2026-Q1 |
| Santori & Peters, Inc. added | 602,336 | $151M | 0.4% | 2026-Q1 |
| PointState Capital LP added | 600,656 | $150M | 0.4% | 2026-Q1 |
| PNC FINANCIAL SERVICES GROUP, INC. added | 564,462 | $141M | 0.4% | 2026-Q1 |
| Robeco Institutional Asset Management B.V. trimmed | 563,907 | $141M | 0.4% | 2026-Q1 |
| Qube Research & Technologies Ltd added | 502,140 | $125M | 0.3% | 2026-Q1 |
| Swiss National Bank added | 501,729 | $125M | 0.3% | 2026-Q1 |
| AustralianSuper Pty Ltd trimmed | 495,032 | $124M | 0.3% | 2026-Q1 |
| PARK PRESIDIO CAPITAL LLC trimmed | 492,733 | $123M | 0.3% | 2026-Q1 |
| BARCLAYS PLC added | 473,265 | $118M | 0.3% | 2026-Q1 |
| PINEBRIDGE INVESTMENTS LLC trimmed | 411,243 | $103M | 0.3% | 2026-Q1 |
| ALLIANCEBERNSTEIN L.P. added | 473,908 | $101M | 0.3% | 2026-Q1 |
| ROYAL BANK OF CANADA added | 393,048 | $98M | 0.3% | 2026-Q1 |
| Russell Investments Group, Ltd. added | 393,860 | $98M | 0.3% | 2026-Q1 |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main added | 386,926 | $97M | 0.2% | 2026-Q1 |
| PFA Pension, Forsikringsaktieselskab trimmed | 385,374 | $96M | 0.2% | 2026-Q1 |
| Mitsubishi UFJ Asset Management Co., Ltd. added | 382,282 | $96M | 0.2% | 2026-Q1 |
| Sumitomo Mitsui Trust Group, Inc. trimmed | 375,671 | $94M | 0.2% | 2026-Q1 |
| KBC Group NV trimmed | 373,720 | $93M | 0.2% | 2026-Q1 |
| Vanguard Global Advisers, LLC new | 372,151 | $93M | 0.2% | 2026-Q1 |
| PZENA INVESTMENT MANAGEMENT LLC added | 367,753 | $92M | 0.2% | 2026-Q1 |
| California Public Employees Retirement System trimmed | 367,673 | $92M | 0.2% | 2026-Q1 |
| Bristol Gate Capital Partners Inc. trimmed | 356,661 | $89M | 0.2% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS added | 353,525 | $88M | 0.2% | 2026-Q1 |
| HSBC HOLDINGS PLC added | 351,769 | $88M | 0.2% | 2026-Q1 |
| Candriam S.C.A. trimmed | 331,492 | $83M | 0.2% | 2026-Q1 |
| RHUMBLINE ADVISERS trimmed | 321,235 | $80M | 0.2% | 2026-Q1 |
| Impax Asset Management Group plc added | 318,350 | $80M | 0.2% | 2026-Q1 |
| JANUS HENDERSON GROUP PLC added | 313,398 | $78M | 0.2% | 2026-Q1 |
| FEDERATED HERMES, INC. trimmed | 313,210 | $78M | 0.2% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP added | 311,906 | $78M | 0.2% | 2026-Q1 |
| Man Group plc added | 304,656 | $76M | 0.2% | 2026-Q1 |
| NEUBERGER BERMAN GROUP LLC added | 291,109 | $73M | 0.2% | 2026-Q1 |
| TD Asset Management Inc trimmed | 284,438 | $71M | 0.2% | 2026-Q1 |
| BLAIR WILLIAM & CO/IL trimmed | 283,859 | $71M | 0.2% | 2026-Q1 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM trimmed | 281,890 | $70M | 0.2% | 2026-Q1 |
| VANGUARD ASSET MANAGEMENT, Ltd new | 278,081 | $69M | 0.2% | 2026-Q1 |
| Bank Julius Baer & Co. Ltd, Zurich added | 277,619 | $69M | 0.2% | 2026-Q1 |
| TOMS Capital Investment Management LP new | 272,000 | $68M | 0.2% | 2026-Q1 |
| WELLS FARGO & COMPANY/MN added | 268,337 | $67M | 0.2% | 2026-Q1 |
| TREMBLANT CAPITAL GROUP trimmed | 267,858 | $67M | 0.2% | 2026-Q1 |
| National Pension Service trimmed | 263,822 | $66M | 0.2% | 2026-Q1 |
| First Pacific Advisors, LP trimmed | 260,732 | $65M | 0.2% | 2026-Q1 |
| Caisse de depot et placement du Quebec added | 259,020 | $65M | 0.2% | 2026-Q1 |
| CANADA PENSION PLAN INVESTMENT BOARD added | 252,222 | $63M | 0.2% | 2026-Q1 |
| Border to Coast Pensions Partnership Ltd added | 232,826 | $58M | 0.1% | 2026-Q1 |
| VALUE HOLDINGS MANAGEMENT CO. LLC trimmed | 230,902 | $58M | 0.1% | 2026-Q1 |
| BECK MACK & OLIVER LLC trimmed | 229,162 | $57M | 0.1% | 2026-Q1 |
| Erste Asset Management GmbH added | 239,913 | $57M | 0.1% | 2026-Q1 |
| Aberdeen Group plc added | 220,732 | $55M | 0.1% | 2026-Q1 |
| Maple Rock Capital Partners Inc. new | 215,400 | $54M | 0.1% | 2026-Q1 |
| ACADIAN ASSET MANAGEMENT LLC added | 212,424 | $53M | 0.1% | 2026-Q1 |
| SG Americas Securities, LLC added | 206,116 | $52M | 0.1% | 2026-Q1 |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC trimmed | 205,710 | $51M | 0.1% | 2026-Q1 |
| VANGUARD GROUP INC trimmed | 19,803,000 | $4.2B | 10.9% | 2025-Q4 stale |
| Burgundy Asset Management Ltd. added | 718,779 | $139M | 0.4% | 2025-Q3 stale |
| Junto Capital Management LP added | 543,202 | $116M | 0.3% | 2025-Q4 stale |
| BRISTOL JOHN W & CO INC /NY/ trimmed | 327,281 | $70M | 0.2% | 2025-Q4 stale |
| Freestone Grove Partners LP added | 272,549 | $55M | 0.1% | 2025-Q3 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.