Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
805 institutional managers reported holding BWXT for the quarter ended Mar 31, 2026. Together they hold about 90% of shares outstanding; the top 10 hold 42%. 153 opened new positions; 95 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| BlackRock | 12.49M | 13.59% | $2.56B | added +2% | 2015 Q3 |
| Vanguard Group | 9.70M | 10.55% | $1.98B | added +7.5% | 2015 Q2 |
| State Street | 3.75M | 4.08% | $767.3M | added +4.2% | 2015 Q3 |
| Invesco | 2.52M | 2.75% | $516.3M | trimmed -1.8% | 2015 Q3 |
| Franklin Resources | 1.90M | 2.07% | $389.2M | trimmed -15.8% | 2015 Q3 |
| Geode Capital | 1.79M | 1.95% | $367.1M | trimmed -3.5% | 2015 Q3 |
| Alkeon Capital Management LLC | 1.74M | 1.89% | $356.0M | added +10% | 2025 Q2 |
| VAN ECK Associates CORP | 1.58M | 1.72% | $324.3M | added +27% | 2016 Q3 |
| Blair William & CO/IL | 1.44M | 1.56% | $294.4M | unchanged | 2016 Q3 |
| First Trust Advisors LP | 1.39M | 1.51% | $284.7M | added +12.2% | 2015 Q3 |
| Mirae Asset Global Etfs Holdings LTD. | 1.36M | 1.48% | $278.3M | added +44.5% | 2024 Q2 |
| T. Rowe Price Investment Management, INC. | 1.33M | 1.44% | $271.7M | added +8% | 2022 Q3 |
| MFS Investment Management | 1.29M | 1.40% | $263.3M | trimmed -6.5% | 2025 Q2 |
| BNY Mellon | 1.28M | 1.40% | $262.8M | added +8.4% | 2015 Q3 |
| Snyder Capital Management L P | 1.10M | 1.20% | $225.6M | trimmed -17% | 2015 Q3 |
| Artisan Partners | 1.06M | 1.15% | $216.8M | trimmed -3.3% | 2025 Q2 |
| Bank OF America CORP /DE/ | 1.01M | 1.09% | $205.8M | added +5.5% | 2015 Q3 |
| William Blair Investment Management, LLC | 981.8k | 1.07% | $201.0M | trimmed -11.4% | 2016 Q3 |
| Morgan Stanley | 977.8k | 1.06% | $200.1M | trimmed -1.5% | 2015 Q2 |
| Clearbridge Investments, LLC | 827.8k | 0.90% | $169.4M | trimmed -5.2% | 2022 Q2 |
| FMR (Fidelity) | 820.5k | 0.89% | $167.9M | trimmed -5.8% | 2015 Q2 |
| Mawer Investment Management LTD. | 734.2k | 0.80% | $150.3M | trimmed -5% | 2021 Q4 |
| Fiera Capital CORP | 729.3k | 0.79% | $149.3M | added +0.8% | 2023 Q1 |
| Select Equity Group | 726.4k | 0.79% | $148.7M | added +68.9% | 2023 Q4 |
| Northern Trust | 722.1k | 0.79% | $147.8M | added +3.8% | 2015 Q2 |
| Dimensional Fund Advisors | 696.5k | 0.76% | $142.6M | trimmed -11.3% | 2015 Q3 |
| Charles Schwab Investment Management | 689.4k | 0.75% | $141.1M | added +2.8% | 2015 Q3 |
| Bessemer Group INC | 626.1k | 0.68% | $128.2M | added +1.9% | 2022 Q2 |
| ARK Investment Management | 622.5k | 0.68% | $127.4M | trimmed -6.7% | 2024 Q4 |
| T. Rowe Price | 612.1k | 0.67% | $125.3M | added +2.3% | 2015 Q3 |
| AllianceBernstein | 580.2k | 0.63% | $118.8M | added +2.8% | 2015 Q3 |
| Capital Group (American Funds) | 569.4k | 0.62% | $116.5M | opened | 2026 Q1 |
| UBS | 569.1k | 0.62% | $116.5M | trimmed -0.9% | 2015 Q3 |
| Stephens Investment Management Group LLC | 558.6k | 0.61% | $114.3M | unchanged | 2024 Q4 |
| Two Sigma | 551.8k | 0.60% | $112.9M | added +37.2% | 2021 Q4 |
| Federated Hermes, INC. | 540.5k | 0.59% | $110.6M | added +19.2% | 2022 Q1 |
| Raymond James Financial INC | 533.6k | 0.58% | $109.2M | trimmed -1.5% | 2017 Q1 |
| Chevy Chase Trust Holdings, LLC | 532.1k | 0.58% | $108.9M | added +2.6% | 2025 Q1 |
| Arrowstreet Capital | 491.4k | 0.54% | $100.6M | trimmed -13.5% | 2023 Q4 |
| Thrivent Financial for Lutherans | 477.0k | 0.52% | $97.6M | trimmed -26.2% | 2023 Q2 |
| Royal Bank OF Canada | 436.1k | 0.47% | $89.3M | trimmed -12.8% | 2015 Q2 |
| Barrow Hanley Mewhinney & Strauss LLC | 426.1k | 0.46% | $87.2M | trimmed -2.3% | 2019 Q1 |
| Citigroup INC | 398.4k | 0.43% | $81.5M | trimmed -2.7% | 2015 Q3 |
| Goldman Sachs | 397.8k | 0.43% | $81.4M | added +18.9% | 2015 Q3 |
| FengHe Fund Management Pte. LTD. (focused) | 393.2k | 0.43% | $80.5M | opened | 2026 Q1 |
| ZWJ Investment Counsel INC | 392.3k | 0.43% | $80.3M | trimmed -3.9% | 2015 Q3 |
| Schroder Investment Management Group | 380.9k | 0.41% | $78.0M | trimmed -2.7% | 2016 Q1 |
| Wells Fargo & COMPANY/MN | 336.2k | 0.37% | $68.8M | added +58% | 2015 Q3 |
| Principal Financial Group INC | 326.0k | 0.35% | $66.7M | added +16.8% | 2019 Q4 |
| Orbis Allan Gray LTD | 298.4k | 0.33% | $61.1M | trimmed -3.6% | 2025 Q2 |
Largest 50 of 805 shown; the full ranked, searchable register is at boothcheck.com/holders/BWXT. Related filers are grouped using the filings' own included-manager declarations. Historically, several managers opening new positions in the same quarter said almost nothing about the quarter that followed (59,118 cases since 2013). A filed record, not a forecast. Nothing here is investment advice.