Westinghouse Air Brake Technologies Corporation
US ˙ NYSE ˙ US9297401088

SecurityWAB / Westinghouse Air Brake Technologies Corporation
InstitutionDimensional Fund Advisors Lp
Latest Disclosed Ownership1,725,361 shares
Latest Disclosed Value $ 431,023,472
Dimensional Fund Advisors Lp reports 0.86% decrease in ownership of WAB / Westinghouse Air Brake Technologies Corporation

On May 7, 2026 - Dimensional Fund Advisors Lp filed a 13F-HR form disclosing ownership of 1,725,361 shares of Westinghouse Air Brake Technologies Corporation (US:WAB) valued at $431,184,968 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 1,740,265 shares of Westinghouse Air Brake Technologies Corporation. This represents a change in shares of -0.86% during the quarter. The current value of the position is $453,390,364 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-07 2026-03-31 13F WABTEC COM 929740108 1,725,361 -14,904 -0.86 431,023 16.02 0.0193
2026-02-12 2025-12-31 13F WABTEC COM 929740108 1,740,265 22,024 1.28 371,501 7.87 0.0779
2025-11-12 2025-09-30 13F WABTEC COM 929740108 1,718,241 19,952 1.17 344,405 -3.13 0.0739
2025-08-12 2025-06-30 13F WABTEC COM 929740108 1,698,289 -11,673 -0.68 355,526 14.66 0.0823
2025-05-13 2025-03-31 13F WABTEC COM 929740108 1,709,962 -6,842 -0.40 310,082 -4.74 0.0771
2025-02-13 2024-12-31 13F WABTEC COM 929740108 1,716,804 85,796 5.26 325,513 9.79 0.0782
2024-11-07 2024-09-30 13F WABTEC COM 929740108 1,631,008 9,345 0.58 296,476 15.67 0.0719
2024-08-09 2024-06-30 13F WABTEC COM 929740108 1,621,663 53,485 3.41 256,318 12.20 0.0669
2024-05-10 2024-03-31 13F WABTEC COM 929740108 1,568,178 -128,365 -7.57 228,452 6.11 0.0619
2024-02-07 2023-12-31 13F WABTEC COM 929740108 1,696,543 88,421 5.50 215,293 25.97 0.0629
2023-11-09 2023-09-30 13F WABTEC COM 929740108 1,608,122 -4,400 -0.27 170,913 -3.35 0.0561
2023-08-09 2023-06-30 13F WABTEC COM 929740108 1,612,522 37,507 2.38 176,831 11.11 0.0564
2023-05-12 2023-03-31 13F WABTEC COM 929740108 1,575,015 63,010 4.17 159,151 106,000.00 0.0536
2023-02-09 2022-12-31 13F WABTEC COM 929740108 1,512,005 14,364 0.96 151 -99.88 0.0446
2022-11-10 2022-09-30 13F WABTEC COM 929740108 1,497,641 25,350 1.72 121,842 0.83 0.0468
2022-08-12 2022-06-30 13F WABTEC COM 929740108 1,472,291 2,946 0.20 120,839 -14.51 0.0433
2022-05-13 2022-03-31 13F WABTEC COM 929740108 1,469,345 2,056 0.14 141,343 4.59 0.0435
2022-02-09 2021-12-31 13F WABTEC COM 929740108 1,467,289 -17,447 -1.18 135,145 5.56 0.0409
2021-11-12 2021-09-30 13F WABTEC COM 929740108 1,484,736 -16,289 -1.09 128,027 3.65 0.0412
2021-08-12 2021-06-30 13F WABTEC COM 929740108 1,501,025 9,595 0.64 123,520 4.62 0.0391
2021-05-14 2021-03-31 13F WABTEC COM 929740108 1,491,430 54,302 3.78 118,069 12.24 0.0391
2021-03-08 2020-12-31 13F/A-2 WABTEC COM 929740108 1,437,128 15,447 1.09 105,190 19.56 0.0380
2021-02-11 2020-12-31 13F WABTEC COM 929740108 1,437,128 15,447 105,190 37,989.0368
2020-11-12 2020-09-30 13F WABTEC COM 929740108 1,421,681 64,513 4.75 87,978 12.61 0.0373
2020-08-13 2020-06-30 13F WABTEC COM 929740108 1,357,168 5,211 0.39 78,128 20.05 0.0343
2020-05-14 2020-03-31 13F WABTEC COM 929740108 1,351,957 206,535 18.03 65,082 -26.97 0.0339
2020-02-14 2019-12-31 13F WABTEC COM 929740108 1,145,422 73,894 6.90 89,112 15.73 0.0325
2019-11-12 2019-09-30 13F WABTEC COM 929740108 1,071,528 -36,136 -3.26 77,003 -3.09 0.0299
2019-08-13 2019-06-30 13F WABTEC COM 929740108 1,107,664 60,843 5.81 79,458 2.97 0.0309
2019-08-12 2019-03-31 13F/A-2 WABTEC COM 929740108 1,046,821 256,411 32.44 77,166 39.00 0.0307
2019-05-10 2019-03-31 13F WABTEC COM 929740108 1,046,821 256,411 77,166
2019-02-26 2018-12-31 13F/A-1 WABTEC COM 929740108 790,410 69,451 9.63 55,516 -26.59 0.0251
2019-02-13 2018-12-31 13F WABTEC COM 929740108 790,410 69,451 55,516
2018-11-13 2018-09-30 13F WABTEC COM 929740108 720,959 14,229 2.01 75,629 8.56 0.0288
2018-08-10 2018-06-30 13F WABTEC COM 929740108 706,730 15,182 2.20 69,668 23.76 0.0278
2018-05-11 2018-03-31 13F WABTEC COM 929740108 691,548 -9,399 -1.34 56,292 -1.38 0.0235
2018-02-12 2017-12-31 13F WABTEC COM 929740108 700,947 77,160 12.37 57,081 20.80 0.0237
2017-11-13 2017-09-30 13F WABTEC COM 929740108 623,787 194,785 45.40 47,252 20.38 0.0206
2017-08-11 2017-06-30 13F WABTEC COM 929740108 429,002 -14,961 -3.37 39,251 13.35 0.0181
2017-05-12 2017-03-31 13F WABTEC COM 929740108 443,963 16,876 3.95 34,627 -2.35 0.0165
2017-02-09 2016-12-31 13F WABTEC COM 929740108 427,087 -2,942 -0.68 35,459 1.01 0.0177
2016-11-10 2016-09-30 13F WABTEC COM 929740108 430,029 46,479 12.12 35,105 30.33 0.0190
2016-08-09 2016-06-30 13F WABTEC COM 929740108 383,550 53,370 16.16 26,936 2.89 0.0155
2016-05-13 2016-03-31 13F WABTEC COM 929740108 330,180 78,071 30.97 26,180 46.01 0.0157
2016-02-10 2015-12-31 13F WABTEC COM 929740108 252,109 12,440 5.19 17,930 -15.02 0.0112
2015-11-13 2015-09-30 13F WABTEC COM 929740108 239,669 14,369 6.38 21,100 -0.62 0.0138
2015-08-14 2015-06-30 13F WABTEC COM 929740108 225,300 -1,749 -0.77 21,232 -1.58 0.0130
2015-05-14 2015-03-31 13F WABTEC COM 929740108 227,049 -21,277 -8.57 21,573 -0.03 0.0136
2015-02-06 2014-12-31 13F WABTEC COM 929740108 248,326 502 0.20 21,580 7.44 0.0142
2014-11-13 2014-09-30 13F WABTEC COM 929740108 247,824 -29,137 -10.52 20,085 -12.19 0.0142
2014-08-08 2014-06-30 13F WABTEC COM 929740108 276,961 -3,756 -1.34 22,874 5.15 0.0159
2014-05-14 2014-03-31 13F WABTEC COM 929740108 280,717 -56 -0.02 21,753 4.32 0.0163
2014-02-12 2013-12-31 13F WABTEC COM 929740108 280,773 -1,841 -0.65 20,853 17.38 0.0162
2013-11-13 2013-09-30 13F WABTEC COM 929740108 282,614 5,168 1.86 17,766 19.85 0.0154
2013-08-15 2013-06-30 13F WABTEC COM 929740108 277,446 277,446 14,824 0.0140
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.