Halliburton Company
MX ˙ BMV ˙ US4062161017
SecurityMX:HAL / Halliburton Company
InstitutionJohn G Ullman & Associates Inc
Latest Disclosed Ownership82,108 shares
Latest Disclosed Value $ 3,201,391
John G Ullman & Associates Inc reports 2.26% decrease in ownership of HAL / Halliburton Company

On May 6, 2026 - John G Ullman & Associates Inc filed a 13F-HR form disclosing ownership of 82,108 shares of Halliburton Company (MX:HAL) valued at $3,201,391 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 84,008 shares of Halliburton Company. This represents a change in shares of -2.26% during the quarter.

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)
2026-05-06 2026-03-31 13F HALLIBURTON COM 406216101 82,108 -1,900 -2.26 3,201 34.84 0.4244
2026-02-05 2025-12-31 13F HALLIBURTON COM 406216101 84,008 4,300 5.39 2,374 21.12 0.3166
2025-11-05 2025-09-30 13F HALLIBURTON COM 406216101 79,708 16,000 25.11 1,961 51.00 0.2640
2025-07-29 2025-06-30 13F HALLIBURTON COM 406216101 63,708 39,050 158.37 1,298 107.68 0.1927
2025-05-06 2025-03-31 13F HALLIBURTON COM 406216101 24,658 -9,625 -28.08 626 -32.94 0.0965
2025-02-05 2024-12-31 13F HALLIBURTON COM 406216101 34,283 -46,225 -57.42 932 -60.14 0.1372
2024-11-08 2024-09-30 13F HALLIBURTON COM 406216101 80,508 -161,900 -66.79 2,339 -71.45 0.3363
2024-08-08 2024-06-30 13F HALLIBURTON CO HLDG COM 406216101 242,408 85,400 54.39 8,189 32.30 1.2493
2024-05-06 2024-03-31 13F HALLIBURTON CO HLDG COM 406216101 157,008 18,260 13.16 6,189 23.41 0.9495
2024-01-31 2023-12-31 13F HALLIBURTON CO HLDG COM 406216101 138,748 28,588 25.95 5,016 12.42 0.7956
2023-11-01 2023-09-30 13F HALLIBURTON CO HLDG COM 406216101 110,160 -10 -0.01 4,461 22.76 0.7298
2023-08-21 2023-06-30 13F HALLIBURTON CO HLDG COM 406216101 110,170 -16,500 -13.03 3,635 90,750.00 0.5608
2023-05-05 2023-03-31 13F HALLIBURTON CO HLDG COM 406216101 126,670 35,240 38.54 4 33.33 0.6234
2023-02-08 2022-12-31 13F HALLIBURTON CO HLDG COM 406216101 91,430 67,660 284.64 4 -99.49 0.5737
2022-10-19 2022-09-30 13F HALLIBURTON CO HLDG COM 406216101 23,770 0 0.00 585 -21.48 0.1024
2022-07-27 2022-06-30 13F HALLIBURTON CO HLDG COM 406216101 23,770 0 0.00 745 -17.22 0.1196
2022-04-29 2022-03-31 13F HALLIBURTON CO HLDG COM 406216101 23,770 0 0.00 900 65.44 0.1247
2022-01-26 2021-12-31 13F HALLIBURTON CO HLDG COM 406216101 23,770 0 0.00 544 5.84 0.0748
2021-11-02 2021-09-30 13F HALLIBURTON CO HLDG COM 406216101 23,770 -1,200 -4.81 514 -10.92 0.0699
2021-07-23 2021-06-30 13F HALLIBURTON CO HLDG COM 406216101 24,970 100 0.40 577 8.05 0.0752
2021-04-22 2021-03-31 13F HALLIBURTON CO HLDG COM 406216101 24,870 11,000 79.31 534 103.82 0.0716
2021-02-05 2020-12-31 13F HALLIBURTON CO HLDG COM 406216101 13,870 13,870 262 0.0406
2020-04-14 2020-03-31 13F HALLIBURTON CO HLDG COM 406216101 0 -255,200 -100.00 0 -100.00
2020-01-29 2019-12-31 13F HALLIBURTON CO HLDG COM 406216101 255,200 44,800 21.29 6,244 57.44 1.0749
2019-10-21 2019-09-30 13F HALLIBURTON CO HLDG COM 406216101 210,400 143,372 213.90 3,966 160.24 0.7204
2019-08-02 2019-06-30 13F HALLIBURTON CO HLDG COM 406216101 67,028 -156,372 -70.00 1,524 -76.72 0.2680
2019-04-30 2019-03-31 13F HALLIBURTON CO HLDG COM 406216101 223,400 8,000 3.71 6,546 14.34 1.1852
2019-01-29 2018-12-31 13F HALLIBURTON CO HLDG COM 406216101 215,400 86,600 67.24 5,725 9.67 1.1548
2018-11-02 2018-09-30 13F HALLIBURTON COM 406216101 128,800 20,050 18.44 5,220 6.53 0.9490
2018-07-23 2018-06-30 13F HALLIBURTON COM 406216101 108,750 73,950 212.50 4,900 199.88 0.9267
2018-04-19 2018-03-31 13F HALLIBURTON COM 406216101 34,800 34,800 1,634 0.3159
2017-11-03 2017-09-30 13F HALLIBURTON COM 406216101 0 -63,684 -100.00 0 -100.00
2017-07-26 2017-06-30 13F HALLIBURTON COM 406216101 63,684 -3,700 -5.49 2,720 -17.97 0.5397
2017-04-25 2017-03-31 13F HALLIBURTON CO HAL COM 406216101 67,384 -1,800 -2.60 3,316 -11.38 0.6856
2017-01-20 2016-12-31 13F HALLIBURTON CO HAL COM 406216101 69,184 -1,700 -2.40 3,742 17.64 0.7839
2016-10-20 2016-09-30 13F HALLIBURTON CO HAL COM 406216101 70,884 -2,750 -3.73 3,181 -4.62 0.6542
2016-07-22 2016-06-30 13F HALLIBURTON CO HAL COM 406216101 73,634 -200 -0.27 3,335 26.47 0.6849
2016-04-27 2016-03-31 13F HALLIBURTON CO HAL COM 406216101 73,834 18,650 33.80 2,637 40.42 0.6187
2016-02-11 2015-12-31 13F HALLIBURTON CO HAL COM 406216101 55,184 -5,200 -8.61 1,878 -12.04 0.4150
2015-10-23 2015-09-30 13F/A-1 HALLIBURTON CO HAL COM 406216101 60,384 -3,700 -5.77 2,135 -22.64 0.5066
2015-10-21 2015-09-30 13F HALLIBURTON CO HAL COM 406216101 64,084 2,760
2015-08-11 2015-06-30 13F HALLIBURTON CO HAL COM 406216101 64,084 -2,250 -3.39 2,760 -5.19 0.5195
2015-05-13 2015-03-31 13F HALLIBURTON COM 406216101 66,334 20,600 45.04 2,911 61.81 0.5533
2015-01-26 2014-12-31 13F HALLIBURTON COM 406216101 45,734 33,734 281.12 1,799 154.46 0.3388
2014-05-07 2014-03-31 13F HALLIBURTON COM 406216101 12,000 -200 -1.64 707 14.22 0.1310
2014-02-03 2013-12-31 13F HALLIBURTON COM 406216101 12,200 -300 -2.40 619 2.82 0.1182
2013-11-04 2013-09-30 13F HALLIBURTON COM 406216101 12,500 -200 -1.57 602 13.58 0.1226
2013-08-14 2013-06-30 13F HALLIBURTON COM 406216101 12,700 12,700 530 0.1107
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.