BWX Technologies, Inc.
US ˙ NYSE ˙ US05605H1005

SecurityBWXT / BWX Technologies, Inc.
InstitutionSei Investments Co
Latest Disclosed Ownership177,841 shares
Latest Disclosed Value $ 30,738,629
Sei Investments Co reports 8.03% decrease in ownership of BWXT / BWX Technologies, Inc.

On February 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 177,841 shares of BWX Technologies, Inc. (US:BWXT) valued at $30,738,038 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 193,378 shares of BWX Technologies, Inc.. This represents a change in shares of -8.03% during the quarter. The current value of the position is $32,850,790 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-02-13 2025-12-31 13F BWX TECHNOLOGIES COM 05605H100 177,841 -15,537 -8.03 30,739 -13.78 0.0303
2025-11-13 2025-09-30 13F BWX TECHNOLOGIES COM 05605H100 193,378 -63,591 -24.75 35,653 -3.69 0.0383
2025-08-14 2025-06-30 13F BWX TECHNOLOGIES COM 05605H100 256,969 42,577 19.86 37,018 75.03 0.0429
2025-05-14 2025-03-31 13F/A-1 BWX TECHNOLOGIES COM 05605H100 214,392 32,484 17.86 21,150 4.38 0.0272
2025-05-13 2025-03-31 13F BWX TECHNOLOGIES COM 05605H100 177,323 -4,585 19,192 0.0209
2025-02-11 2024-12-31 13F BWX TECHNOLOGIES COM 05605H100 181,908 96 0.05 20,262 2.52 0.0260
2024-11-12 2024-09-30 13F BWX TECHNOLOGIES COM 05605H100 181,812 44,313 32.23 19,763 51.26 0.0257
2024-08-13 2024-06-30 13F BWX TECHNOLOGIES COM 05605H100 137,499 10,977 8.68 13,067 0.64 0.0185
2024-05-07 2024-03-31 13F BWX TECHNOLOGIES COM 05605H100 126,522 -74,116 -36.94 12,984 -15.66 0.0190
2024-02-14 2023-12-31 13F BWX TECHNOLOGIES COM 05605H100 200,638 -16,242 -7.49 15,394 -5.32 0.0247
2023-11-14 2023-09-30 13F BWX TECHNOLOGIES COM 05605H100 216,880 -14,446 -6.24 16,259 -1.79 0.0292
2023-08-11 2023-06-30 13F BWX TECHNOLOGIES COM 05605H100 231,326 31,071 15.52 16,557 31.15 0.0289
2023-05-12 2023-03-31 13F BWX TECHNOLOGIES COM 05605H100 200,255 -10,797 -5.12 12,624 2.99 0.0234
2023-02-10 2022-12-31 13F BWX TECHNOLOGIES COM 05605H100 211,052 5,777 2.81 12,258 18.56 0.0272
2022-11-14 2022-09-30 13F BWX TECHNOLOGIES COM 05605H100 205,275 27,269 15.32 10,339 6.34 0.0231
2022-08-15 2022-06-30 13F BWX TECHNOLOGIES COM 05605H100 178,006 48,446 37.39 9,723 40.83 0.0210
2022-05-13 2022-03-31 13F BWX TECHNOLOGIES COM 05605H100 129,560 26,120 25.25 6,904 41.68 0.0139
2022-02-14 2021-12-31 13F BWX TECHNOLOGIES COM 05605H100 103,440 705 0.69 4,873 -10.32 0.0091
2021-11-12 2021-09-30 13F BWX TECHNOLOGIES COM 05605H100 102,735 2,700 2.70 5,434 -4.92 0.0114
2021-08-06 2021-06-30 13F BWX TECHNOLOGIES COM 05605H100 100,035 -14 -0.01 5,715 -10.17 0.0127
2021-05-12 2021-03-31 13F BWX TECHNOLOGIES COM 05605H100 100,049 20,099 25.14 6,362 35.53 0.0160
2021-02-08 2020-12-31 13F BWX TECHNOLOGIES COM 05605H100 79,950 14,506 22.17 4,694 31.41 0.0121
2020-12-04 2020-09-30 13F/A-1 BWX TECHNOLOGIES COM 05605H100 65,444 4,228 6.91 3,572 3.42 0.0103
2020-11-06 2020-09-30 13F BWX TECHNOLOGIES COM 05605H100 74,147 12,931 4,062 9,780.3929
2020-08-17 2020-06-30 13F/A-1 BWX TECHNOLOGIES COM 05605H100 61,216 -15,587 -20.29 3,454 -8.21 0.0107
2020-08-11 2020-06-30 13F BWX TECHNOLOGIES COM 05605H100 60,081 -16,722 3,622 9,824.8678
2020-05-14 2020-03-31 13F BWX TECHNOLOGIES COM 05605H100 76,803 -2,353 -2.97 3,763 -22.81 0.0138
2020-02-06 2019-12-31 13F BWX TECHNOLOGIES COM 05605H100 79,156 -7,808 -8.98 4,875 -0.14 0.0145
2019-11-12 2019-09-30 13F BWX TECHNOLOGIES COM 05605H100 86,964 -2,283 -2.56 4,882 6.78 0.0125
2019-08-14 2019-06-30 13F BWX TECHNOLOGIES COM 05605H100 89,247 -122,240 -57.80 4,572 -56.38 0.0149
2019-05-15 2019-03-31 13F BWX TECHNOLOGIES COM 05605H100 211,487 -26,005 -10.95 10,481 -21.30 0.0352
2019-02-13 2018-12-31 13F BWX TECHNOLOGIES COM 05605H100 237,492 -18,383 -7.18 13,318 -16.74 0.0474
2018-11-08 2018-09-30 13F BWX TECHNOLOGIES COM 05605H100 255,875 -53,597 -17.32 15,995 -17.06 0.0580
2018-08-03 2018-06-30 13F BWX TECHNOLOGIES COM 05605H100 309,472 18,726 6.44 19,286 4.41 0.0656
2018-05-11 2018-03-31 13F BWX TECHNOLOGIES COM 05605H100 290,746 -44,236 -13.21 18,471 -8.85 0.0708
2018-02-08 2017-12-31 13F BWX TECHNOLOGIES COM 05605H100 334,982 -23,552 -6.57 20,264 0.89 0.0704
2017-11-06 2017-09-30 13F BWX TECHNOLOGIES COM 05605H100 358,534 684 0.19 20,085 15.13 0.0714
2017-07-31 2017-06-30 13F BWX TECHNOLOGIES COM 05605H100 357,850 37,370 11.66 17,446 14.36 0.0695
2017-05-05 2017-03-31 13F BWX TECHNOLOGIES COM 05605H100 320,480 -10,949 -3.30 15,255 15.94 0.0669
2017-02-02 2016-12-31 13F BWX TECHNOLOGIES COM 05605H100 331,429 296 0.09 13,158 3.56 0.0637
2016-11-04 2016-09-30 13F BWX TECHNOLOGIES COM 05605H100 331,133 12,234 3.84 12,706 11.38 0.0645
2016-08-11 2016-06-30 13F BWX TECHNOLOGIES COM 05605H100 318,899 120,776 60.96 11,408 71.57 0.0684
2016-05-10 2016-03-31 13F/A-1 BWX TECHNOLOGIES COM 05605H100 198,123 13,236 7.16 6,649 13.19 0.0414
2016-02-03 2015-12-31 13F BWX TECHNOLOGIES COM 05605H100 184,887 184,325 32,798.04 5,874 39,060.00 0.0358
2015-11-02 2015-09-30 13F/A-1 BWX TECHNOLOGIES COM 05605H100 562 -5,605 -90.89 15 -92.61 0.0001
2015-10-30 2015-09-30 13F BWX TECHNOLOGIES COM 05605H100 562 15
2015-08-07 2015-06-30 13F/A-1 BABCOCK & WILCOX CO COM 05615F102 6,167 -28,899 -82.41 203 -81.96 0.0018
2015-08-04 2015-06-30 13F BABCOCK & WILCOX CO COM 05615F102 6,167 -28,899 203 0.0018
2015-05-14 2015-03-31 13F/A-1 BABCOCK & WILCOX CO COM 05615F102 35,066 -17 -0.05 1,125 5.73 0.0098
2015-05-01 2015-03-31 13F BRT RLTY TR SH BEN INT NEW 05615F102 35,066 1,125
2015-02-10 2014-12-31 13F BABCOCK & WILCOX CO COM 05615F102 35,083 35,083 1,064 0.0094
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.