Occidental Petroleum Corporation
CH ˙ SWX ˙ US6745991058
SecurityCH:OXY / Occidental Petroleum Corporation
InstitutionNational Pension Service
Latest Disclosed Ownership1,158,255 shares
Latest Disclosed Value $ 75,286,575
National Pension Service reports 6.82% increase in ownership of OXY / Occidental Petroleum Corporation

On May 12, 2026 - National Pension Service filed a 13F-HR form disclosing ownership of 1,158,255 shares of Occidental Petroleum Corporation (CH:OXY) valued at $75,286,575 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 1,084,356 shares of Occidental Petroleum Corporation. This represents a change in shares of 6.82% 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)
2026-05-12 2026-03-31 13F OCCIDENTAL PETE COM 674599105 1,158,255 73,899 6.82 75,287 68.85 0.0572
2026-02-10 2025-12-31 13F OCCIDENTAL PETE OCCIDENTAL PETE CORP 674599105 1,084,356 124,879 13.02 44,589 -1.65 0.0330
2025-11-04 2025-09-30 13F OCCIDENTAL PETE COM 674599105 959,477 11,041 1.16 45,335 13.78 0.0352
2025-08-08 2025-06-30 13F OCCIDENTAL PETE COM 674599105 948,436 25,943 2.81 39,844 -12.50 0.0344
2025-05-13 2025-03-31 13F OCCIDENTAL PETE COM 674599105 922,493 -15,750 -1.68 45,534 -1.78 0.0438
2025-02-05 2024-12-31 13F OCCIDENTAL PETE COM 674599105 938,243 -618,218 -39.72 46,359 -42.21 0.0439
2024-10-30 2024-09-30 13F OCCIDENTALPETECORP COM 674599105 1,556,461 133,546 9.39 80,220 -10.55 0.0774
2024-08-13 2024-06-30 13F OCCIDENTAL PETE COM 674599105 1,422,915 9,065 0.64 89,686 -2.39 0.1030
2024-05-14 2024-03-31 13F OCCIDENTAL PETE COM 674599105 1,413,850 71,558 5.33 91,886 14.65 0.1103
2024-02-07 2023-12-31 13F OCCIDENTAL PETE COM 674599105 1,342,292 34,786 2.66 80,148 -2.93 0.1116
2023-11-15 2023-09-30 13F OCCIDENTAL PETE COM 674599105 1,307,506 -20,579 -1.55 82,569 6.24 0.1321
2023-08-16 2023-06-30 13F OCCIDENTAL PETE COM 674599105 1,328,085 -118,032 -8.16 77,720 -13.76 0.1254
2023-05-12 2023-03-31 13F OCCIDENTAL PETE COM 674599105 1,446,117 -369,984 -20.37 90,122 -21.22 0.1641
2023-02-24 2022-12-31 13F/A-1 OCCIDENTAL PETE COM 674599105 1,816,101 26,261 1.47 114,396 2.91 0.2250
2023-02-21 2022-12-31 13F OCCIDENTAL PETE COM 674599105 1,816,101 26,261 114 0.2250
2023-02-24 2022-09-30 13F/A-1 OCCIDENTAL PETE COM 674599105 1,789,840 33,191 1.89 111,167 7.48 0.2320
2022-11-18 2022-09-30 13F OCCIDENTAL PETE COM 674599105 1,789,840 33,191 111,167 0.2320
2022-08-17 2022-06-30 13F OCCIDENTAL PETE COM 674599105 1,756,649 161,627 10.13 103,431 14.29 0.2132
2022-05-13 2022-03-31 13F OCCIDENTAL PETE COM 674599105 1,595,022 145,369 10.03 90,502 115.35 0.1652
2022-02-15 2021-12-31 13F OCCIDENTAL PETE COM 674599105 1,449,653 -31,280 -2.11 42,025 -4.07 0.0733
2021-11-18 2021-09-30 13F OCCIDENTAL PETE COM 674599105 1,480,933 292,418 24.60 43,806 17.87 0.0834
2021-08-17 2021-06-30 13F OCCIDENTAL PETE COM 674599105 1,188,515 0 0.00 37,165 17.47 0.0706
2021-05-14 2021-03-31 13F OCCIDENTAL PETE COM 674599105 1,188,515 -118,960 -9.10 31,638 39.79 0.0662
2021-02-19 2020-12-31 13F OCCIDENTAL PETE COM 674599105 1,307,475 106,203 8.84 22,632 82.21 0.0516
2020-11-13 2020-09-30 13F OCCIDENTAL PETE COM 674599105 1,201,272 0 0.00 12,421 -43.50 0.0326
2020-08-11 2020-06-30 13F OCCIDENTAL PETE COM 674599105 1,201,272 -92,585 -7.16 21,983 46.72 0.0628
2020-05-27 2020-03-31 13F OCCIDENTAL PETE COM 674599105 1,293,857 20,073 1.58 14,983 -71.46 0.0507
2020-02-21 2019-12-31 13F OCCIDENTAL PETE COM 674599105 1,273,784 209,023 19.63 52,493 10.86 0.1440
2019-11-15 2019-09-30 13F OCCIDENTAL PETE COM 674599105 1,064,761 235,309 28.37 47,350 13.54 0.1498
2019-08-14 2019-06-30 13F OCCIDENTAL PETE COM 674599105 829,452 30,483 3.82 41,705 -21.15 0.1394
2019-05-15 2019-03-31 13F OCCIDENTAL PETE COM 674599105 798,969 28,771 3.74 52,892 3.16 0.2035
2019-02-15 2018-12-31 13F OCCIDENTAL PETE CORP DEL COM 674599105 770,198 43,607 6.00 51,272 -14.12 0.2115
2018-11-15 2018-09-30 13F OCCIDENTAL PETE CORP DEL COM 674599105 726,591 26,931 3.85 59,704 2.32 0.2430
2018-08-14 2018-06-30 13F OCCIDENTAL PETE CORP DEL COM 674599105 699,660 13,475 1.96 58,352 30.91 0.2640
2018-04-13 2018-03-31 13F OCCIDENTAL PETE CORP DEL COM 674599105 686,185 8,552 1.26 44,575 -10.70 0.2210
2018-01-17 2017-12-31 13F OCCIDENTAL PETE CORP DEL COM 674599105 677,633 19,317 2.93 49,914 16.70 0.2492
2017-10-16 2017-09-30 13F OCCIDENTAL PETROLEUM COM 674599105 658,316 26,212 4.15 42,771 13.15 0.2354
2017-07-13 2017-06-30 13F OCCIDENTAL PETE CORP DEL COM 674599105 632,104 68,597 12.17 37,800 4.37 0.2252
2017-04-11 2017-03-31 13F OCCIDENTAL PETE CORP DEL COM 674599105 563,507 34,614 6.54 36,217 -3.86 0.2424
2017-01-18 2016-12-31 13F OCCIDENTAL PETE CORP DEL COM 674599105 528,893 32,607 6.57 37,673 4.10 0.2577
2016-10-14 2016-09-30 13F OCCIDENTAL PETE CORP DEL COM 674599105 496,286 40,088 8.79 36,189 4.99 0.2900
2016-08-11 2016-06-30 13F OCCIDENTAL PETE CORP DEL COM 674599105 456,198 42,782 10.35 34,470 21.85 0.3060
2016-05-16 2016-03-31 13F OCCIDENTAL PETE CORP DEL COM 674599105 413,416 16,931 4.27 28,290 5.54 0.2834
2016-02-12 2015-12-31 13F OCCIDENTAL PETE CORP DEL COM 674599105 396,485 24,726 6.65 26,806 9.00 0.2815
2015-10-15 2015-09-30 13F OCCIDENTAL PETE CORP DEL COM 674599105 371,759 50,470 15.71 24,592 -1.58 0.3109
2015-07-15 2015-06-30 13F OCCIDENTAL PETE CORP DEL COM 674599105 321,289 44,466 16.06 24,986 23.64 0.3241
2015-04-15 2015-03-31 13F OCCIDENTAL PETE CORP DEL COM 674599105 276,823 34,036 14.02 20,208 3.25 0.2920
2015-01-13 2014-12-31 13F OCCIDENTAL PETE CORP DEL COM 674599105 242,787 -29,599 -10.87 19,571 -25.27 0.3303
2014-11-07 2014-09-30 13F OCCIDENTAL PETE CORP DEL COM 674599105 272,386 272,386 26,190 0.4158
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.