BWX Technologies, Inc.
DE ˙ DB ˙ US05605H1005
160,85 € ↑3,20 (2,03%)
2026-06-05
DEL PRIS
SecurityDE:4BW / BWX Technologies, Inc.
InstitutionBamco Inc /ny/
Latest Disclosed Ownership1,626 shares
Latest Disclosed Value $ 332,501
Bamco Inc /ny/ reports 89.29% increase in ownership of 4BW / BWX Technologies, Inc.

On May 15, 2026 - Bamco Inc /ny/ filed a 13F-HR form disclosing ownership of 1,626 shares of BWX Technologies, Inc. (DE:4BW) valued at $287,802 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 859 shares of BWX Technologies, Inc.. This represents a change in shares of 89.29% during the quarter. The current value of the position is $261,542 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)
2026-05-15 2026-03-31 13F BWX TECHNOLOGIES COM 05605H100 1,626 767 89.29 333 124.32 0.0010
2026-02-17 2025-12-31 13F BWX TECHNOLOGIES COM 05605H100 859 859 148 0.0004
2021-02-12 2020-12-31 13F BWX TECHNOLOGIES COM 05605H100 0 -598,627 -100.00 0 -100.00
2020-11-13 2020-09-30 13F BWX TECHNOLOGIES COM 05605H100 598,627 -63,871 -9.64 33,709 -10.17 0.1035
2020-08-14 2020-06-30 13F BWX TECHNOLOGIES COM 05605H100 662,498 1,665 0.25 37,524 16.57 0.1356
2020-05-15 2020-03-31 13F BWX TECHNOLOGIES COM 05605H100 660,833 7,262 1.11 32,189 -20.67 0.1577
2020-02-18 2019-12-31 13F BWX TECHNOLOGIES COM 05605H100 653,571 1,856 0.28 40,574 8.82 0.1549
2019-11-14 2019-09-30 13F BWX TECHNOLOGIES COM 05605H100 651,715 -3,099 -0.47 37,285 9.29 0.1534
2019-08-15 2019-06-30 13F BWX TECHNOLOGIES COM 05605H100 654,814 -151 -0.02 34,116 5.06 0.1368
2019-05-15 2019-03-31 13F BWX TECHNOLOGIES COM 05605H100 654,965 71,155 12.19 32,473 45.49 0.1377
2019-02-14 2018-12-31 13F BWX TECHNOLOGIES COM 05605H100 583,810 30,918 5.59 22,319 -35.45 0.1130
2018-11-14 2018-09-30 13F BWX TECHNOLOGIES COM 05605H100 552,892 -117 -0.02 34,578 0.33 0.1432
2018-08-14 2018-06-30 13F BWX TECHNOLOGIES COM 05605H100 553,009 2,590 0.47 34,464 -1.44 0.1507
2018-05-09 2018-03-31 13F BWX TECHNOLOGIES COM 05605H100 550,419 -50 -0.01 34,968 5.02 0.1609
2018-02-14 2017-12-31 13F BWX TECHNOLOGIES COM 05605H100 550,469 70,110 14.60 33,298 23.74 0.1535
2017-11-15 2017-09-30 13F BWX TECHNOLOGIES COM 05605H100 480,359 39,840 9.04 26,910 25.31 0.1277
2017-08-14 2017-06-30 13F BWX TECHNOLOGIES COM 05605H100 440,519 171,098 63.51 21,475 67.46 0.1097
2017-05-15 2017-03-31 13F BWX TECHNOLOGIES COM 05605H100 269,421 269,421 12,824 0.0679
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.