Occidental Petroleum Corporation
CH ˙ SWX ˙ US6745991058
SecurityCH:OXY / Occidental Petroleum Corporation
InstitutionRehmann Capital Advisory Group
Latest Disclosed Ownership3,642 shares
Latest Disclosed Value $ 236,767
Rehmann Capital Advisory Group ownership in OXY / Occidental Petroleum Corporation

On May 15, 2026 - Rehmann Capital Advisory Group filed a 13F-HR form disclosing ownership of 3,642 shares of Occidental Petroleum Corporation (CH:OXY) valued at $236,767 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on November 20, 2020 disclosing 0 shares of Occidental Petroleum Corporation.

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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-15 2026-03-31 13F OCCIDENTAL PETE COM 674599105 3,642 3,642 237 0.0123
2020-11-20 2020-03-31 13F/A-1 OCCIDENTAL PETE COM 674599105 0 -16,624 -100.00 0 -100.00
2020-01-02 2019-09-30 13F OCCIDENTAL PETE COM 674599105 16,624 2,209 15.32 739 2.07 0.0894
2019-08-27 2019-06-30 13F OCCIDENTAL PETE COM 674599105 14,415 1,166 8.80 725 -17.45 0.0892
2019-05-22 2019-03-31 13F OCCIDENTAL PETE COM 674599105 13,249 2,512 23.40 877 33.08 0.1189
2019-02-12 2018-12-31 13F OCCIDENTAL PETE CORP DEL COM 674599105 10,737 -404 -3.63 659 -27.98 0.0989
2018-12-07 2018-09-30 13F/A-1 OCCIDENTALPETECORPDEL COM 674599105 11,141 666 6.36 915 4.45 0.1262
2018-09-20 2018-06-30 13F OCCIDENTAL PETE CORP DEL COM 674599105 10,475 -535 -4.86 877 22.52 0.1272
2018-04-24 2018-03-31 13F OCCIDENTAL PETE CORP DEL COM 674599105 11,010 511 4.87 715 -7.50 0.1113
2018-02-22 2017-12-31 13F OCCIDENTAL PETE CORP DEL COM 674599105 10,499 420 4.17 773 19.47 0.1304
2017-10-25 2017-09-30 13F OCCIDENTAL PETE CORP DEL COM 674599105 10,079 10,079 647 0.1166
2017-04-24 2017-03-31 13F OCCIDENTAL PETE CORP DEL COM 674599105 0 -2,896 -100.00 0 -100.00
2017-02-13 2016-12-31 13F OCCIDENTAL PETE CORP DEL COM 674599105 2,896 -40 -1.36 206 -3.74 0.0377
2016-10-26 2016-09-30 13F OCCIDENTAL PETE CORP DEL COM 674599105 2,936 -544 -15.63 214 -18.63 0.0415
2016-07-25 2016-06-30 13F OCCIDENTAL PETE CORP DEL COM 674599105 3,480 -581 -14.31 263 -5.40 0.0492
2016-05-09 2016-03-31 13F OCCIDENTAL PETE CORP DEL COM 674599105 4,061 -1,557 -27.71 278 -26.84 0.0541
2016-02-11 2015-12-31 13F OCCIDENTAL PETE CORP DEL COM 674599105 5,618 612 12.23 380 14.80 0.0798
2015-11-12 2015-09-30 13F OCCIDENTAL PETE CORP DEL COM 674599105 5,006 322 6.87 331 -9.07 0.0749
2015-07-08 2015-06-30 13F OCCIDENTAL PETE CORP DEL COM 674599105 4,684 630 15.54 364 22.97 0.0831
2015-04-14 2015-03-31 13F OCCIDENTAL PETE CORP DEL COM 674599105 4,054 1,385 51.89 296 37.67 0.0672
2015-03-09 2014-12-31 13F/A-1 OCCIDENTAL PETE CORP DEL COM 674599105 2,669 -737 -21.64 215 -34.25 0.0495
2015-09-01 2014-09-30 13F OCCIDENTAL PETE CORP DEL COM 674599105 3,406 118 3.59 327 -2.97 0.0774
2015-09-01 2014-06-30 13F OCCIDENTAL PETE CORP DEL COM 674599105 3,288 491 17.55 337 26.69 0.0805
2015-08-31 2014-03-31 13F OCCIDENTAL PETE CORP DEL COM 674599105 2,797 -17 -0.60 266 -0.75 0.0719
2015-08-31 2013-12-31 13F OCCIDENTAL PETE CORP DEL COM 674599105 2,814 2,814 268 0.0811
2015-08-31 2012-12-31 13F OCCIDENTAL PETE CORP DEL COM 674599105 0 -2,707 -100.00 0 -100.00
2015-08-31 2012-09-30 13F OCCIDENTAL PETE CORP DEL COM 674599105 2,707 -141 -4.95 233 -4.51 0.0856
2015-08-31 2012-06-30 13F OCCIDENTAL PETE CORP DEL COM 674599105 2,848 -636 -18.25 244 -26.51 0.0802
2015-08-31 2012-03-31 13F OCCIDENTAL PETE CORP DEL COM 674599105 3,484 876 33.59 332 36.07 0.1010
2015-08-31 2011-12-31 13F OCCIDENTAL PETE CORP DEL COM 674599105 2,608 2,608 244 0.0782
2015-08-31 2011-09-30 13F OCCIDENTAL PETE CORP DEL COM 674599105 0 -2,454 -100.00 0 -100.00
2015-08-31 2011-06-30 13F OCCIDENTAL PETE CORP DEL COM 674599105 2,454 319 14.94 255 14.35 0.0791
2015-08-31 2011-03-31 13F OCCIDENTAL PETE CORP DEL COM 674599105 2,135 2,135 223 0.0775
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.