Who owns Westinghouse Air Brake Technologies (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-Q2 13F filings (latest filed 2026-09-22). 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
301 tracked funds added or opened WAB while 183 trimmed or exited it between 2026-Q1 and 2026-Q2 — 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
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 2026-Q1 and 2026-Q2, across 1116 tracked filers holding WAB, 527 increased or opened the position and 545 reduced or closed it; over the same quarter, open-market insider Form 4s were net sales.
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 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 39
- Junto Capital Management LP$142M
- Jupiter Topco LLC$83M
- Davidson Kempner Capital Management LP$54M
- Encompass Capital Advisors LLC$20M
- Nykredit A/S$20M
- J. Goldman & Co LP$17M
Full exits 79
- Beutel, Goodman & Co Ltd.$412M
- Amundi$275M
- BESSEMER GROUP INC$179M
- KBC Group NV$93M
- PZENA INVESTMENT MANAGEMENT LLC$92M
- JANUS HENDERSON GROUP PLC$78M
Largest adds
- BlackRock, Inc.$995M
- FMR LLC$836M
- Vontobel Holding Ltd.$282M
- Invesco Ltd.$233M
- AMERIPRISE FINANCIAL INC$220M
- VANGUARD CAPITAL MANAGEMENT LLC$219M
Largest trims
- WELLINGTON MANAGEMENT GROUP LLP$177M
- FARALLON CAPITAL MANAGEMENT, L.L.C.$161M
- Assenagon Asset Management S.A.$160M
- Qube Research & Technologies Ltd$98M
- Select Equity Group, L.P.$78M
- BARCLAYS PLC$64M
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| FMR LLC added | 21,383,543 | $5.8B | 15.5% | 2026-Q2 |
| BlackRock, Inc. added | 13,876,398 | $3.7B | 10.1% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 11,083,880 | $3.0B | 8.1% | 2026-Q2 |
| STATE STREET CORP added | 7,905,748 | $2.1B | 5.7% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ trimmed | 7,271,071 | $2.0B | 5.3% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC added | 7,170,659 | $1.9B | 5.2% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC trimmed | 4,522,854 | $1.2B | 3.3% | 2026-Q2 |
| FIL Ltd added | 3,526,833 | $951M | 2.6% | 2026-Q2 |
| NORDEA INVESTMENT MANAGEMENT AB trimmed | 3,093,207 | $836M | 2.3% | 2026-Q2 |
| Invesco Ltd. added | 2,794,714 | $753M | 2.0% | 2026-Q2 |
| MORGAN STANLEY added | 2,491,148 | $672M | 1.8% | 2026-Q2 |
| Select Equity Group, L.P. trimmed | 2,421,552 | $653M | 1.8% | 2026-Q2 |
| Boston Partners added | 2,019,014 | $543M | 1.5% | 2026-Q2 |
| NORGES BANK added | 1,896,763 | $511M | 1.4% | 2026-Q2 |
| NORTHERN TRUST CORP added | 1,731,125 | $467M | 1.3% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP trimmed | 1,714,273 | $462M | 1.2% | 2026-Q2 |
| WELLINGTON MANAGEMENT GROUP LLP trimmed | 1,670,476 | $450M | 1.2% | 2026-Q2 |
| JPMORGAN CHASE & CO added | 1,520,067 | $408M | 1.1% | 2026-Q2 |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ trimmed | 1,428,720 | $390M | 1.1% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 1,424,945 | $384M | 1.0% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC added | 1,370,868 | $370M | 1.0% | 2026-Q2 |
| Vontobel Holding Ltd. added | 1,227,500 | $331M | 0.9% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC added | 1,209,721 | $326M | 0.9% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 1,107,445 | $299M | 0.8% | 2026-Q2 |
| AMERICAN CENTURY COMPANIES INC trimmed | 1,065,784 | $287M | 0.8% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC added | 981,110 | $265M | 0.7% | 2026-Q2 |
| ROYAL LONDON ASSET MANAGEMENT LTD trimmed | 960,916 | $259M | 0.7% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO trimmed | 952,696 | $257M | 0.7% | 2026-Q2 |
| KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC trimmed | 932,034 | $251M | 0.7% | 2026-Q2 |
| Nuveen, LLC trimmed | 906,097 | $244M | 0.7% | 2026-Q2 |
| Legal & General Group Plc trimmed | 895,289 | $241M | 0.7% | 2026-Q2 |
| FARALLON CAPITAL MANAGEMENT, L.L.C. trimmed | 894,503 | $241M | 0.6% | 2026-Q2 |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main added | 870,716 | $235M | 0.6% | 2026-Q2 |
| BANK OF MONTREAL /CAN/ trimmed | 820,726 | $221M | 0.6% | 2026-Q2 |
| Bank of New York Mellon Corp trimmed | 788,917 | $213M | 0.6% | 2026-Q2 |
| DEUTSCHE BANK AG\ trimmed | 768,650 | $207M | 0.6% | 2026-Q2 |
| AVIVA PLC trimmed | 715,841 | $193M | 0.5% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ added | 689,065 | $186M | 0.5% | 2026-Q2 |
| PointState Capital LP added | 638,455 | $172M | 0.5% | 2026-Q2 |
| Santori & Peters, Inc. added | 603,290 | $163M | 0.4% | 2026-Q2 |
| RAYMOND JAMES FINANCIAL INC trimmed | 599,752 | $162M | 0.4% | 2026-Q2 |
| UBS Group AG trimmed | 581,201 | $157M | 0.4% | 2026-Q2 |
| Impax Asset Management Group plc added | 558,757 | $151M | 0.4% | 2026-Q2 |
| Robeco Institutional Asset Management B.V. trimmed | 545,788 | $147M | 0.4% | 2026-Q2 |
| PNC Financial Services Group, Inc. trimmed | 535,906 | $144M | 0.4% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. added | 528,718 | $132M | 0.4% | 2026-Q2 |
| Junto Capital Management LP trimmed | 526,732 | $142M | 0.4% | 2026-Q2 |
| PARK PRESIDIO CAPITAL LLC trimmed | 490,321 | $132M | 0.4% | 2026-Q2 |
| AustralianSuper Pty Ltd trimmed | 487,973 | $132M | 0.4% | 2026-Q2 |
| Swiss National Bank trimmed | 480,029 | $129M | 0.3% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS added | 445,118 | $120M | 0.3% | 2026-Q2 |
| Mitsubishi UFJ Asset Management Co., Ltd. added | 408,742 | $110M | 0.3% | 2026-Q2 |
| California Public Employees Retirement System added | 381,463 | $103M | 0.3% | 2026-Q2 |
| ROYAL BANK OF CANADA trimmed | 379,028 | $102M | 0.3% | 2026-Q2 |
| Sumitomo Mitsui Trust Group, Inc. added | 377,797 | $102M | 0.3% | 2026-Q2 |
| Alyeska Investment Group, L.P. trimmed | 367,726 | $99M | 0.3% | 2026-Q2 |
| Vanguard Global Advisers, LLC trimmed | 364,998 | $98M | 0.3% | 2026-Q2 |
| Candriam S.C.A. added | 364,034 | $98M | 0.3% | 2026-Q2 |
| Russell Investments Group, Ltd. trimmed | 356,207 | $96M | 0.3% | 2026-Q2 |
| CANADA PENSION PLAN INVESTMENT BOARD added | 341,727 | $92M | 0.2% | 2026-Q2 |
| HSBC HOLDINGS PLC trimmed | 338,531 | $91M | 0.2% | 2026-Q2 |
| RHUMBLINE ADVISERS trimmed | 319,229 | $86M | 0.2% | 2026-Q2 |
| VANGUARD ASSET MANAGEMENT, Ltd added | 313,852 | $85M | 0.2% | 2026-Q2 |
| FEDERATED HERMES, INC. trimmed | 312,719 | $84M | 0.2% | 2026-Q2 |
| Jupiter Topco LLC new | 309,793 | $83M | 0.2% | 2026-Q2 |
| Erste Asset Management GmbH added | 298,115 | $80M | 0.2% | 2026-Q2 |
| Bank Julius Baer & Co. Ltd, Zurich added | 292,319 | $79M | 0.2% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN added | 284,956 | $77M | 0.2% | 2026-Q2 |
| BLAIR WILLIAM & CO/IL trimmed | 268,737 | $72M | 0.2% | 2026-Q2 |
| National Pension Service added | 268,030 | $72M | 0.2% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM trimmed | 257,324 | $69M | 0.2% | 2026-Q2 |
| TREMBLANT CAPITAL GROUP trimmed | 252,814 | $68M | 0.2% | 2026-Q2 |
| Aberdeen Group plc added | 251,025 | $68M | 0.2% | 2026-Q2 |
| NEUBERGER BERMAN GROUP LLC trimmed | 247,348 | $67M | 0.2% | 2026-Q2 |
| PFA Pension, Forsikringsaktieselskab trimmed | 241,811 | $65M | 0.2% | 2026-Q2 |
| Bristol Gate Capital Partners Inc. trimmed | 234,949 | $63M | 0.2% | 2026-Q2 |
| Resona Asset Management Co.,Ltd. added | 233,300 | $63M | 0.2% | 2026-Q2 |
| MARSHALL WACE, LLP added | 230,000 | $62M | 0.2% | 2026-Q2 |
| BECK MACK & OLIVER LLC added | 229,482 | $62M | 0.2% | 2026-Q2 |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. added | 227,664 | $61M | 0.2% | 2026-Q2 |
| CITIGROUP INC added | 224,775 | $61M | 0.2% | 2026-Q2 |
| BANK OF NOVA SCOTIA added | 215,675 | $58M | 0.2% | 2026-Q2 |
| Maple Rock Capital Partners Inc. | 215,400 | $58M | 0.2% | 2026-Q2 |
| PINEBRIDGE INVESTMENTS LLC trimmed | 215,219 | $58M | 0.2% | 2026-Q2 |
| FIRST TRUST ADVISORS LP added | 212,353 | $57M | 0.2% | 2026-Q2 |
| BARCLAYS PLC trimmed | 202,820 | $55M | 0.1% | 2026-Q2 |
| Davidson Kempner Capital Management LP new | 200,000 | $54M | 0.1% | 2026-Q2 |
| Assenagon Asset Management S.A. trimmed | 195,252 | $53M | 0.1% | 2026-Q2 |
| Ensign Peak Advisors, Inc added | 194,809 | $53M | 0.1% | 2026-Q2 |
| Man Group plc trimmed | 193,131 | $52M | 0.1% | 2026-Q2 |
| PRINCIPAL FINANCIAL GROUP INC trimmed | 191,476 | $52M | 0.1% | 2026-Q2 |
| DANSKE BANK A/S added | 190,696 | $51M | 0.1% | 2026-Q2 |
| First Pacific Advisors, LP trimmed | 189,045 | $51M | 0.1% | 2026-Q2 |
| Universal- Beteiligungs- und Servicegesellschaft mbH trimmed | 188,069 | $51M | 0.1% | 2026-Q2 |
| TD Asset Management Inc trimmed | 180,003 | $49M | 0.1% | 2026-Q2 |
| ENVESTNET ASSET MANAGEMENT INC trimmed | 177,316 | $48M | 0.1% | 2026-Q2 |
| NEW YORK STATE COMMON RETIREMENT FUND added | 169,355 | $46M | 0.1% | 2026-Q2 |
| Quantinno Capital Management LP added | 162,177 | $44M | 0.1% | 2026-Q2 |
| SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC added | 144,820 | $39M | 0.1% | 2026-Q2 |
| Banco Santander, S.A. added | 144,711 | $39M | 0.1% | 2026-Q2 |
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.