BWX Technologies, Inc.
US ˙ NYSE ˙ US05605H1005

SecurityBWXT / BWX Technologies, Inc.
InstitutionNatixis Advisors, L.p.
Latest Disclosed Ownership42,572 shares
Latest Disclosed Value $ 8,706
Natixis Advisors, L.p. reports 39.06% increase in ownership of BWXT / BWX Technologies, Inc.

On May 13, 2026 - Natixis Advisors, L.p. filed a 13F-HR form disclosing ownership of 42,572 shares of BWX Technologies, Inc. (US:BWXT) valued at $8,705,548 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 30,614 shares of BWX Technologies, Inc.. This represents a change in shares of 39.06% during the quarter. The current value of the position is $7,863,900 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)
2026-05-13 2026-03-31 13F BWX TECHNOLOGIES COM 05605H100 42,572 11,958 39.06 9 60.00 0.0121
2026-02-10 2025-12-31 13F BWX TECHNOLOGIES COM 05605H100 30,614 -13,779 -31.04 5 -37.50 0.0075
2025-11-13 2025-09-30 13F BWX TECHNOLOGIES COM 05605H100 44,393 -56,774 -56.12 8 -42.86 0.0119
2025-08-13 2025-06-30 13F BWX TECHNOLOGIES COM 05605H100 101,167 -42,195 -29.43 15 0.00 0.0231
2025-05-08 2025-03-31 13F BWX TECHNOLOGIES COM 05605H100 143,362 -4,370 -2.96 14 -12.50 0.0261
2025-02-10 2024-12-31 13F BWX TECHNOLOGIES COM 05605H100 147,732 985 0.67 16 6.67 0.0307
2024-11-06 2024-09-30 13F BWX TECHNOLOGIES COM 05605H100 146,747 18,404 14.34 16 25.00 0.0311
2024-08-01 2024-06-30 13F BWX TECHNOLOGIES COM 05605H100 128,343 820 0.64 12 -7.69 0.0265
2024-04-25 2024-03-31 13F BWX TECHNOLOGIES COM 05605H100 127,523 82,657 184.23 13 333.33 0.0301
2024-02-06 2023-12-31 13F BWX TECHNOLOGIES COM 05605H100 44,866 -16,031 -26.32 3 -25.00 0.0091
2023-11-13 2023-09-30 13F BWX TECHNOLOGIES COM 05605H100 60,897 -729 -1.18 5 0.00 0.0140
2023-08-15 2023-06-30 13F BWX TECHNOLOGIES COM 05605H100 61,626 -2,952 -4.57 4 0.00 0.0136
2023-05-11 2023-03-31 13F BWX TECHNOLOGIES COM 05605H100 64,578 712 1.11 4 33.33 0.0140
2023-01-27 2022-12-31 13F BWX TECHNOLOGIES COM 05605H100 63,866 4,103 6.87 4 -99.90 0.0140
2022-11-14 2022-09-30 13F BWX TECHNOLOGIES COM 05605H100 59,763 16,280 37.44 3,010 25.68 0.0127
2022-08-12 2022-06-30 13F BWX TECHNOLOGIES COM 05605H100 43,483 2,218 5.38 2,395 7.74 0.0105
2022-05-12 2022-03-31 13F BWX TECHNOLOGIES COM 05605H100 41,265 -2,458 -5.62 2,223 6.21 0.0085
2022-02-08 2021-12-31 13F BWX TECHNOLOGIES COM 05605H100 43,723 -10,176 -18.88 2,093 -27.90 0.0080
2021-11-15 2021-09-30 13F BWX TECHNOLOGIES COM 05605H100 53,899 2,566 5.00 2,903 -2.68 0.0119
2021-08-12 2021-06-30 13F BWX TECHNOLOGIES COM 05605H100 51,333 490 0.96 2,983 -11.01 0.0139
2021-05-05 2021-03-31 13F BWX TECHNOLOGIES COM 05605H100 50,843 -2,507 -4.70 3,352 4.23 0.0175
2021-02-12 2020-12-31 13F BWX TECHNOLOGIES COM 05605H100 53,350 202 0.38 3,216 7.45 0.0185
2020-11-12 2020-09-30 13F BWX TECHNOLOGIES COM 05605H100 53,148 -5,180 -8.88 2,993 -9.41 0.0188
2020-08-11 2020-06-30 13F BWX TECHNOLOGIES COM 05605H100 58,328 12,380 26.94 3,304 47.63 0.0219
2020-04-27 2020-03-31 13F BWX TECHNOLOGIES COM 05605H100 45,948 14,599 46.57 2,238 15.01 0.0182
2020-02-10 2019-12-31 13F BWX TECHNOLOGIES COM 05605H100 31,349 178 0.57 1,946 9.14 0.0137
2019-11-12 2019-09-30 13F BWX TECHNOLOGIES COM 05605H100 31,171 -5,596 -15.22 1,783 -6.94 0.0142
2019-08-12 2019-06-30 13F BWX TECHNOLOGIES COM 05605H100 36,767 -101 -0.27 1,916 4.81 0.0156
2019-05-15 2019-03-31 13F/A-1 BWX TECHNOLOGIES COM 05605H100 36,868 3,548 10.65 1,828 43.60 0.0160
2019-05-15 2019-03-31 13F BWX TECHNOLOGIES COM 05605H100 36,868 3,548 1,828
2019-02-13 2018-12-31 13F/A-1 BWX TECHNOLOGIES COM 05605H100 33,320 -72,547 -68.53 1,273 -80.77 0.0126
2019-02-13 2018-12-31 13F BWX TECHNOLOGIES COM 05605H100 33,320 -72,547 1,273
2018-11-13 2018-09-30 13F BWX TECHNOLOGIES COM 05605H100 105,867 6,772 6.83 6,620 7.21 0.0583
2018-08-14 2018-06-30 13F/A-1 BWX TECHNOLOGIES COM 05605H100 99,095 -14,306 -12.62 6,175 -14.28 0.0590
2018-08-14 2018-06-30 13F BWX TECHNOLOGIES COM 05605H100 99,095 6,175
2018-05-10 2018-03-31 13F BWX TECHNOLOGIES COM 05605H100 113,401 47,139 71.14 7,204 79.74 0.0711
2018-02-14 2017-12-31 13F BWX TECHNOLOGIES COM 05605H100 66,262 -68,685 -50.90 4,008 -46.98 0.0408
2017-11-14 2017-09-30 13F BWX TECHNOLOGIES COM 05605H100 134,947 3,354 2.55 7,559 17.83 0.0799
2017-07-27 2017-06-30 13F BWX TECHNOLOGIES COM 05605H100 131,593 -1,879 -1.41 6,415 0.96 0.0694
2017-05-12 2017-03-31 13F BWX TECHNOLOGIES COM 05605H100 133,472 -4,755 -3.44 6,354 15.78 0.0704
2017-02-07 2016-12-31 13F BWX TECHNOLOGIES COM 05605H100 138,227 -40,959 -22.86 5,488 -20.17 0.0660
2016-11-04 2016-09-30 13F BWX TECHNOLOGIES COM 05605H100 179,186 -8,160 -4.36 6,875 2.58 0.0891
2016-08-01 2016-06-30 13F BWX TECHNOLOGIES COM 05605H100 187,346 -25,942 -12.16 6,702 -6.37 0.0927
2016-05-06 2016-03-31 13F BWX TECHNOLOGIES COM 05605H100 213,288 17,895 9.16 7,158 15.32 0.1071
2016-02-12 2015-12-31 13F BWX TECHNOLOGIES COM 05605H100 195,393 -33,490 -14.63 6,207 2.88 0.1017
2015-11-12 2015-09-30 13F BWX TECHNOLOGIES COM 05605H100 228,883 5,294 2.37 6,033 45.06 0.1046
2015-08-14 2015-06-30 13F BABCOCK and WILCOX COM 05615F102 223,589 11,357 5.35 4,159 -38.93 0.0706
2015-05-15 2015-03-31 13F BABCOCK and WILCOX COM 05615F102 212,232 26,010 13.97 6,810 20.68 0.1195
2015-02-05 2014-12-31 13F BABCOCK and WILCOX COM 05615F102 186,222 16,612 9.79 5,643 20.14 0.1056
2014-11-03 2014-09-30 13F BABCOCK and WILCOX COM 05615F102 169,610 -130,573 -43.50 4,697 -51.80 0.0942
2014-08-13 2014-06-30 13F BABCOCK & WILCOX COM 05615F102 300,183 27,993 10.28 9,744 7.82 0.1396
2014-05-13 2014-03-31 13F BABCOCK & WILCOX COM 05615F102 272,190 -44,218 -13.97 9,037 -16.46 0.1391
2014-02-12 2013-12-31 13F BABCOCK & WILCOX COM 05615F102 316,408 -3,350 -1.05 10,818 0.32 0.1771
2013-10-30 2013-09-30 13F BABCOCK and WILCOX COM 05615F102 319,758 -2,942 -0.91 10,783 11.28 0.1986
2013-07-19 2013-06-30 13F BABCOCK & WILCOX COM 05615F102 322,700 322,700 9,690 0.1931
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.