Halliburton Company
CL ˙ SNSE ˙ US4062161017
SecurityCL:HAL / Halliburton Company
InstitutionMarshall Wace, Llp
Latest Disclosed Ownership4,544,791 shares
Latest Disclosed Value $ 177,201,404
Marshall Wace, Llp reports 51,840.47% increase in ownership of HAL / Halliburton Company

On May 14, 2026 - Marshall Wace, Llp filed a 13F-HR form disclosing ownership of 4,544,791 shares of Halliburton Company (CL:HAL) valued at $177,201,404 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 8,750 shares of Halliburton Company. This represents a change in shares of 51,840.47% 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)
2026-05-14 2026-03-31 13F HALLIBURTON COMMON STOCK 406216101 4,544,791 4,536,041 51,840.47 177,201 71,641.30 0.0836
2026-02-13 2025-12-31 13F HALLIBURTON COMMON STOCK 406216101 8,750 -237,956 -96.45 247 -95.93 0.0002
2025-11-13 2025-09-30 13F HALLIBURTON COMMON STOCK 406216101 246,706 -1,509,772 -85.95 6,069 -83.05 0.0062
2025-08-13 2025-06-30 13F HALLIBURTON COMMON STOCK 406216101 1,756,478 699,198 66.13 35,797 33.46 0.0403
2025-05-15 2025-03-31 13F HALLIBURTON COMMON STOCK 406216101 1,057,280 1,023,767 3,054.84 26,823 2,844.35 0.0341
2025-02-13 2024-12-31 13F HALLIBURTON COMMON STOCK 406216101 33,513 -268,186 -88.89 911 -89.61 0.0011
2024-11-14 2024-09-30 13F HALLIBURTON COMMON STOCK 406216101 301,699 -747,094 -71.23 8,764 -75.26 0.0107
2024-08-14 2024-06-30 13F HALLIBURTON COMMON STOCK 406216101 1,048,793 684,413 187.83 35,428 146.66 0.0473
2024-05-15 2024-03-31 13F HALLIBURTON COMMON STOCK 406216101 364,380 140,527 62.78 14,364 77.50 0.0219
2024-02-14 2023-12-31 13F HALLIBURTON COMMON STOCK 406216101 223,853 77,069 52.51 8,092 36.14 0.0137
2023-11-14 2023-09-30 13F HALLIBURTON COMMON STOCK 406216101 146,784 146,784 5,945 0.0120
2023-08-14 2023-06-30 13F HALLIBURTON COMMON STOCK 406216101 0 -29,563 -100.00 0 -100.00
2023-05-15 2023-03-31 13F HALLIBURTON COMMON STOCK 406216101 29,563 29,563 935 0.0020
2023-02-14 2022-12-31 13F HALLIBURTON COMMON STOCK 406216101 0 -32,812 -100.00 0 -100.00
2022-11-14 2022-09-30 13F HALLIBURTON COMMON STOCK 406216101 32,812 32,812 808 0.0018
2022-05-16 2022-03-31 13F HALLIBURTON COMMON STOCK 406216101 0 -186,566 -100.00 0 -100.00
2022-02-14 2021-12-31 13F HALLIBURTON COMMON STOCK 406216101 186,566 186,566 4,267 0.0079
2021-11-15 2021-09-30 13F HALLIBURTON COMMON STOCK 406216101 0 -44,882 -100.00 0 -100.00
2021-08-13 2021-06-30 13F HALLIBURTON COMMON STOCK 406216101 44,882 44,882 1,038 0.0051
2021-02-16 2020-12-31 13F HALLIBURTON COMMON STOCK 406216101 0 -20,946 -100.00 0 -100.00
2020-11-16 2020-09-30 13F HALLIBURTON COMMON STOCK 406216101 20,946 20,946 252 0.0016
2020-08-13 2020-06-30 13F HALLIBURTON COMMON STOCK 406216101 0 -409,366 -100.00 0 -100.00
2020-05-15 2020-03-31 13F HALLIBURTON COMMON STOCK 406216101 409,366 347,366 560.27 2,803 84.77 0.0280
2020-02-14 2019-12-31 13F HALLIBURTON COMMON STOCK 406216101 62,000 62,000 -84.85 1,517 -45.88 0.0104
2019-08-14 2019-06-30 13F HALLIBURTON COMMON STOCK 406216101 0 -363,878 -100.00 0 -100.00
2019-05-29 2019-03-31 13F/A-1 HALLIBURTON COMMON STOCK 406216101 363,878 363,878 10,662 0.1002
2019-05-14 2019-03-31 13F HALLIBURTON COMMON STOCK 406216101 363,878 363,878 10,662
2018-05-15 2018-03-31 13F HALLIBURTON COMMON STOCK 406216101 0 -62,696 -100.00 0 -100.00
2018-03-29 2017-12-31 13F/A-1 HALLIBURTON COMMON STOCK 406216101 62,696 21,350 51.64 3,064 61.09 0.1288
2018-02-14 2017-12-31 13F HALLIBURTON COMMON STOCK 406216101 62,696 21,350 3,064
2017-11-13 2017-09-30 13F HALLIBURTON COMMON STOCK 406216101 41,346 41,346 -34.05 1,902 -37.92 0.0884
2017-08-04 2017-06-30 13F HALLIBURTON COMMON STOCK 406216101 0 -48,352 -100.00 0 -100.00
2017-05-12 2017-03-31 13F HALLIBURTON COMMON STOCK 406216101 48,352 -320,998 -86.91 2,369 -88.14 0.1143
2017-02-10 2016-12-31 13F HALLIBURTON COMMON STOCK 406216101 369,350 186,293 101.77 19,978 143.19 0.1313
2016-11-10 2016-09-30 13F HALLIBURTON COMMON STOCK 406216101 183,057 144,335 372.75 8,215 368.36 0.0584
2016-08-12 2016-06-30 13F HALLIBURTON COMMON STOCK 406216101 38,722 38,722 -78.85 1,754 -78.65 0.0147
2016-02-10 2015-12-31 13F HALLIBURTON COMMON STOCK 406216101 0 0 0 0.0000
2015-11-12 2015-09-30 13F HALLIBURTON COMMON STOCK 406216101 0 -197,718 -100.00 0 -100.00
2015-08-14 2015-06-30 13F HALLIBURTON COMMON STOCK 406216101 197,718 157,367 390.00 8,515 380.80 0.1111
2015-05-11 2015-03-31 13F HALLIBURTON COMMON STOCK 406216101 40,351 -255,391 -86.36 1,771 -84.77 0.0231
2015-02-17 2014-12-31 13F HALLIBURTON COMMON STOCK 406216101 295,742 25,010 9.24 11,631 -33.40 0.1536
2014-11-13 2014-09-30 13F HALLIBURTON COMMON STOCK 406216101 270,732 43,356 19.07 17,465 8.17 0.2520
2014-08-14 2014-06-30 13F HALLIBURTON COMMON STOCK 406216101 227,376 187,791 474.40 16,146 592.66 0.2377
2014-05-14 2014-03-31 13F HALLIBURTON COMMON STOCK 406216101 39,585 39,585 2,331 0.0424
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.