BWX Technologies, Inc.
MX ˙ BMV ˙ US05605H1005
SecurityMX:BWXT / BWX Technologies, Inc.
InstitutionM&t Bank Corp
Latest Disclosed Ownership9,084 shares
Latest Disclosed Value $ 1,857,587
M&t Bank Corp reports 38.27% decrease in ownership of BWXT / BWX Technologies, Inc.

On May 12, 2026 - M&t Bank Corp filed a 13F-HR form disclosing ownership of 9,084 shares of BWX Technologies, Inc. (MX:BWXT) valued at $1,857,587 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on January 30, 2026 disclosing 14,716 shares of BWX Technologies, Inc.. This represents a change in shares of -38.27% during the quarter.

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)
2026-05-12 2026-03-31 13F BWX TECHNOLOGIES COM 05605H100 9,084 -5,632 -38.27 1,858 -26.98 0.0015
2026-01-30 2025-12-31 13F/A-1 BWX TECHNOLOGIES COM 05605H100 14,716 -1,578 -9.68 2,543 -15.32 0.0082
2026-01-28 2025-12-31 13F BWX TECHNOLOGIES COM 05605H100 21,956 5,662 5,379 0.0032
2025-11-14 2025-09-30 13F BWX TECHNOLOGIES COM 05605H100 16,294 -1,260 -7.18 3,004 18.79 0.0101
2025-08-13 2025-06-30 13F BWX TECHNOLOGIES COM 05605H100 17,554 -613 -3.37 2,529 41.07 0.0087
2025-04-30 2025-03-31 13F BWX TECHNOLOGIES COM 05605H100 18,167 -39,704 -68.61 1,792 -72.20 0.0065
2025-02-06 2024-12-31 13F BWX TECHNOLOGIES COM 05605H100 57,871 -3,832 -6.21 6,446 -3.91 0.0216
2024-11-19 2024-09-30 13F/A-1 BWX TECHNOLOGIES COM 05605H100 61,703 -2,463 -3.84 6,708 10.04 0.0221
2024-11-15 2024-09-30 13F BWX TECHNOLOGIES COM 05605H100 61,703 -2,463 6,708 0.0040
2024-07-31 2024-06-30 13F BWX TECHNOLOGIES COM 05605H100 64,166 -4,366 -6.37 6,096 -13.32 0.0208
2024-05-07 2024-03-31 13F BWX TECHNOLOGIES COM 05605H100 68,532 -1,267 -1.82 7,033 31.32 0.0245
2024-02-06 2023-12-31 13F BWX TECHNOLOGIES COM 05605H100 69,799 -201 -0.29 5,356 2.04 0.0197
2023-11-02 2023-09-30 13F BWX TECHNOLOGIES COM 05605H100 70,000 -551 -0.78 5,248 3.92 0.0209
2023-08-09 2023-06-30 13F BWX TECHNOLOGIES COM 05605H100 70,551 107 0.15 5,050 13.74 0.0189
2023-05-11 2023-03-31 13F BWX TECHNOLOGIES COM 05605H100 70,444 859 1.23 4,441 9.87 0.0172
2023-02-13 2022-12-31 13F/A-1 BWX TECHNOLOGIES COM 05605H100 69,585 -2,471 -3.43 4,042 11.35 0.0163
2023-02-13 2022-12-31 13F BP SPONSORED ADR 05605H100 350,876 278,820 13,864 0.0558
2022-11-17 2022-09-30 13F/A-1 BWX TECHNOLOGIES COM 05605H100 72,056 -109 -0.15 3,629 -7.85 0.0161
2022-11-14 2022-09-30 13F BWX TECHNOLOGIES COM 05605H100 72,056 -109 3,573 0.0030
2022-08-05 2022-06-30 13F BWX TECHNOLOGIES COM 05605H100 72,165 2,206 3.15 3,938 4.48 0.0185
2022-05-09 2022-03-31 13F BWX TECHNOLOGIES COM 05605H100 69,959 31,985 84.23 3,769 107.32 0.0166
2022-02-07 2021-12-31 13F BWX TECHNOLOGIES COM 05605H100 37,974 1,595 4.38 1,818 -7.24 0.0076
2021-10-28 2021-09-30 13F BWX TECHNOLOGIES COM 05605H100 36,379 4,461 13.98 1,960 5.72 0.0088
2021-08-13 2021-06-30 13F BWX TECHNOLOGIES COM 05605H100 31,918 -583 -1.79 1,854 -13.53 0.0081
2021-05-06 2021-03-31 13F BWX TECHNOLOGIES COM 05605H100 32,501 1,395 4.48 2,144 14.29 0.0093
2021-02-12 2020-12-31 13F BWX TECHNOLOGIES COM 05605H100 31,106 -2,236 -6.71 1,876 -0.11 0.0082
2020-11-06 2020-09-30 13F BWX TECHNOLOGIES COM 05605H100 33,342 38 0.11 1,878 -0.42 0.0092
2020-07-29 2020-06-30 13F BWX TECHNOLOGIES COM 05605H100 33,304 -944 -2.76 1,886 13.07 0.0101
2020-05-14 2020-03-31 13F BWX TECHNOLOGIES COM 05605H100 34,248 3,183 10.25 1,668 -13.44 0.0099
2020-02-07 2019-12-31 13F BWX TECHNOLOGIES COM 05605H100 31,065 -1,549 -4.75 1,927 3.27 0.0091
2019-11-12 2019-09-30 13F BWX TECHNOLOGIES COM 05605H100 32,614 -269 -0.82 1,866 8.87 0.0093
2019-08-12 2019-06-30 13F BWX TECHNOLOGIES COM 05605H100 32,883 -232 -0.70 1,714 4.51 0.0090
2019-05-15 2019-03-31 13F BWX TECHNOLOGIES COM 05605H100 33,115 397 1.21 1,640 31.10 0.0086
2019-02-01 2018-12-31 13F BWX TECHNOLOGIES COM 05605H100 32,718 21,444 190.21 1,251 76.94 0.0072
2018-11-09 2018-09-30 13F BWX TECHNOLOGIES COM 05605H100 11,274 -289 -2.50 707 -1.67 0.0035
2018-08-10 2018-06-30 13F BWX TECHNOLOGIES COM 05605H100 11,563 3,727 47.56 719 44.38 0.0039
2018-05-04 2018-03-31 13F BWX TECHNOLOGIES COM 05605H100 7,836 -301 -3.70 498 1.22 0.0027
2018-02-06 2017-12-31 13F BWX TECHNOLOGIES COM 05605H100 8,137 1,527 23.10 492 32.97 0.0026
2017-11-13 2017-09-30 13F BWX TECHNOLOGIES COM 05605H100 6,610 -121 -1.80 370 12.80 0.0020
2017-08-11 2017-06-30 13F BWX TECHNOLOGIES COM 05605H100 6,731 -175 -2.53 328 0.00 0.0019
2017-05-10 2017-03-31 13F BWX TECHNOLOGIES COM 05605H100 6,906 338 5.15 328 25.19 0.0020
2017-02-14 2016-12-31 13F BWX TECHNOLOGIES COM 05605H100 6,568 -148 -2.20 262 1.16 0.0016
2016-11-04 2016-09-30 13F BWX TECHNOLOGIES COM 05605H100 6,716 77 1.16 259 9.75 0.0017
2016-08-04 2016-06-30 13F BWX TECHNOLOGIES COM 05605H100 6,639 69 1.05 236 6.79 0.0016
2016-05-11 2016-03-31 13F BWX TECHNOLOGIES COM 05605H100 6,570 6,570 221 0.0015
2015-11-13 2015-09-30 13F BABCOCK & WILCOX CO COM 05615F102 0 -6,217 -100.00 0 -100.00
2015-08-14 2015-06-30 13F BABCOCK & WILCOX CO COM 05615F102 6,217 6,217 202 0.0012
2014-11-14 2014-09-30 13F BABCOCK & WILCOX COMMON 05615F102 0 -917 -100.00 0 -100.00
2014-08-13 2014-06-30 13F BABCOCK & WILCOX COMMON 05615F102 917 0 0.00 30 0.00 0.0013
2014-05-14 2014-03-31 13F BABCOCK & WILCOX COMMON STOCK 05615F102 917 -14,772 -94.16 30 -94.40 0.0012
2014-02-12 2013-12-31 13F BABCOCK & WILCOX COMMON 05615F102 15,689 -5,808 -27.02 536 -26.07 0.0225
2013-11-13 2013-09-30 13F BABCOCK & WILCOX COMMON 05615F102 21,497 -3,850 -15.19 725 -4.73 0.0346
2013-07-30 2013-06-30 13F BABCOCK & WILCOX COMMON 05615F102 25,347 25,347 761 0.0369
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.