Halliburton Company
US ˙ NYSE ˙ US4062161017

SecurityHAL / Halliburton Company
InstitutionBoston Partners
Latest Disclosed Ownership1,659,692 shares
Latest Disclosed Value $ 64,697,834
Boston Partners reports 9.67% decrease in ownership of HAL / Halliburton Company

On May 11, 2026 - Boston Partners filed a 13F-HR form disclosing ownership of 1,659,692 shares of Halliburton Company (US:HAL) valued at $64,711,391 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 1,837,390 shares of Halliburton Company. This represents a change in shares of -9.67% during the quarter. The current value of the position is $68,097,163 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)
2026-05-11 2026-03-31 13F HALLIBURTON COM 406216101 1,659,692 -177,698 -9.67 64,698 25.74 0.0290
2026-02-13 2025-12-31 13F HALLIBURTON COM 406216101 1,837,390 -75,813 -3.96 51,454 9.24 0.0533
2025-11-13 2025-09-30 13F HALLIBURTON COM 406216101 1,913,203 -135,640 -6.62 47,101 12.73 0.0484
2025-08-12 2025-06-30 13F/A-1 HALLIBURTON COM 406216101 2,048,843 397,237 24.05 41,780 -0.17 0.0464
2025-08-07 2025-06-30 13F HALLIBURTON COM 406216101 2,042,736 391,130 41,656 0.0191
2025-05-13 2025-03-31 13F HALLIBURTON COM 406216101 1,651,606 -4,836,755 -74.55 41,851 -76.28 0.0506
2025-02-11 2024-12-31 13F HALLIBURTON COM 406216101 6,488,361 -2,867,328 -30.65 176,448 -35.07 0.2146
2024-11-12 2024-09-30 13F HALLIBURTON COM 406216101 9,355,689 -829,608 -8.15 271,759 -21.02 0.3207
2024-08-14 2024-06-30 13F HALLIBURTON COM 406216101 10,185,297 -123,611 -1.20 344,065 -15.31 0.4274
2024-05-28 2024-03-31 13F/A-1 HALLIBURTON COM 406216101 10,308,908 -5,979,850 -36.71 406,247 -30.91 0.4839
2024-05-13 2024-03-31 13F HALLIBURTON COM 406216101 10,308,908 -5,979,850 406,247 0.4839
2024-02-07 2023-12-31 13F HALLIBURTON COM 406216101 16,288,758 -5,361,466 -24.76 588,026 -32.88 0.7788
2023-11-08 2023-09-30 13F HALLIBURTON COM 406216101 21,650,224 -4,098,530 -15.92 876,116 2.61 1.2130
2023-08-10 2023-06-30 13F HALLIBURTON COM 406216101 25,748,754 1,120,274 4.55 853,795 9.48 1.1492
2023-05-09 2023-03-31 13F HALLIBURTON COM 406216101 24,628,480 12,228,234 98.61 779,876 59.73 1.0722
2023-02-08 2022-12-31 13F HALLIBURTON COM 406216101 12,400,246 2,448,913 24.61 488,254 99.07 0.6605
2022-11-09 2022-09-30 13F HALLIBURTON COM 406216101 9,951,333 998,022 11.15 245,269 -12.63 0.3590
2022-08-10 2022-06-30 13F HALLIBURTON COM 406216101 8,953,311 -329,659 -3.55 280,727 -20.14 0.3923
2022-05-10 2022-03-31 13F HALLIBURTON COM 406216101 9,282,970 1,541,668 19.91 351,544 98.51 0.4259
2022-02-04 2021-12-31 13F HALLIBURTON COM 406216101 7,741,302 -122,641 -1.56 177,092 4.14 0.2133
2021-11-05 2021-09-30 13F HALLIBURTON COM 406216101 7,863,943 211,050 2.76 170,050 -3.88 0.2154
2021-08-12 2021-06-30 13F HALLIBURTON COM 406216101 7,652,893 901,563 13.35 176,907 22.14 0.2256
2021-05-10 2021-03-31 13F HALLIBURTON COM 406216101 6,751,330 623,524 10.18 144,843 25.06 0.1942
2021-02-10 2020-12-31 13F/A-1 HALLIBURTON COM 406216101 6,127,806 5,457,713 814.47 115,816 1,334.25 0.1801
2021-02-04 2020-12-31 13F HALLIBURTON COM 406216101 6,127,806 5,457,713 115,816 69,482.7161
2020-11-13 2020-09-30 13F/A-1 HALLIBURTON COM 406216101 670,093 29,580 4.62 8,075 -2.87 0.0147
2020-11-09 2020-09-30 13F HALLIBURTON COM 406216101 640,513 0 8,314 6,103.4664
2020-08-12 2020-06-30 13F HALLIBURTON COM 406216101 640,513 132,608 26.11 8,314 138.98 0.0153
2020-05-13 2020-03-31 13F HALLIBURTON COM 406216101 507,905 454,324 847.92 3,479 185.63 0.0069
2019-11-08 2019-09-30 13F HALLIBURTON COM 406216101 53,581 0 0.00 1,218 0.00 0.0016
2019-08-26 2019-06-30 13F/A-1 HALLIBURTON COM 406216101 53,581 -52,144 -49.32 1,218 -60.68 0.0016
2019-08-09 2019-06-30 13F HALLIBURTON COM 406216101 53,581 -52,144 1,218
2019-05-13 2019-03-31 13F/A-1 HALLIBURTON COM 406216101 105,725 -49,360 -31.83 3,098 -24.84 0.0041
2019-05-03 2019-03-31 13F HALLIBURTON COM 406216101 105,725 -49,360 3,098
2019-02-07 2018-12-31 13F HALLIBURTON COM 406216101 155,085 -47,335 -23.38 4,122 -49.76 0.0059
2018-11-14 2018-09-30 13F HALLIBURTON COM 406216101 202,420 19,070 10.40 8,204 -0.70 0.0095
2018-08-03 2018-06-30 13F HALLIBURTON COM 406216101 183,350 7,712 4.39 8,262 0.22 0.0099
2018-05-04 2018-03-31 13F HALLIBURTON COM 406216101 175,638 19,559 12.53 8,244 8.08 0.0099
2018-02-14 2017-12-31 13F/A-1 HALLIBURTON COM 406216101 156,079 20,160 14.83 7,628 21.93 0.0090
2018-02-01 2017-12-31 13F HALLIBURTON COM 406216101 156,079 20,160 7,628
2017-11-02 2017-09-30 13F HALLIBURTON COM 406216101 135,919 0 0.00 6,256 7.77 0.0077
2017-08-02 2017-06-30 13F HALLIBURTON COM 406216101 135,919 0 0.00 5,805 -13.22 0.0074
2017-05-03 2017-03-31 13F HALLIBURTON COM 406216101 135,919 56,910 72.03 6,689 56.50 0.0085
2017-02-06 2016-12-31 13F HALLIBURTON COM 406216101 79,009 0 0.00 4,274 20.53 0.0056
2016-11-09 2016-09-30 13F HALLIBURTON COM 406216101 79,009 0 0.00 3,546 -0.89 0.0050
2016-08-05 2016-06-30 13F HALLIBURTON COM 406216101 79,009 6,940 9.63 3,578 39.01 0.0052
2016-05-12 2016-03-31 13F HALLIBURTON COM 406216101 72,069 17,518 32.11 2,574 38.61 0.0038
2016-02-08 2015-12-31 13F HALLIBURTON COM 406216101 54,551 0 0.00 1,857 -3.68 0.0027
2015-11-10 2015-09-30 13F HALLIBURTON COM 406216101 54,551 -3,478 -5.99 1,928 -22.85 0.0029
2015-08-10 2015-06-30 13F HALLIBURTON COM 406216101 58,029 -21,785 -27.29 2,499 -28.64 0.0036
2015-05-05 2015-03-31 13F HALLIBURTON COM 406216101 79,814 -36,377 -31.31 3,502 -23.37 0.0052
2015-02-09 2014-12-31 13F HALLIBURTON COM 406216101 116,191 -123,196 -51.46 4,570 -70.41 0.0069
2014-11-12 2014-09-30 13F HALLIBURTON COM 406216101 239,387 -207,515 -46.43 15,443 -51.34 0.0251
2014-08-08 2014-06-30 13F HALLIBURTON COM 406216101 446,902 89,721 25.12 31,735 50.87 0.0532
2014-05-07 2014-03-31 13F HALLIBURTON COM 406216101 357,181 -76,142 -17.57 21,034 -4.35 0.0384
2014-02-06 2013-12-31 13F HALLIBURTON COM 406216101 433,323 -5,030,014 -92.07 21,991 -91.64 0.0451
2013-11-12 2013-09-30 13F HALLIBURTON COM 406216101 5,463,337 -3,643,645 -40.01 263,060 -30.76 0.6343
2013-08-01 2013-06-30 13F HALLIBURTON COM 406216101 9,106,982 9,106,982 379,943 1.0460
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.