Occidental Petroleum Corporation
US ˙ NYSE ˙ US6745991058

SecurityOXY / Occidental Petroleum Corporation
InstitutionTompkins Financial Corp
Latest Disclosed Ownership1,806 shares
Latest Disclosed Value $ 117,390
Tompkins Financial Corp reports 22.36% increase in ownership of OXY / Occidental Petroleum Corporation

On April 9, 2026 - Tompkins Financial Corp filed a 13F-HR form disclosing ownership of 1,806 shares of Occidental Petroleum Corporation (US:OXY) valued at $117,390 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 8, 2026 disclosing 1,476 shares of Occidental Petroleum Corporation. This represents a change in shares of 22.36% during the quarter. The current value of the position is $107,710 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)
2026-04-09 2026-03-31 13F OCCIDENTAL PETE COM 674599105 1,806 330 22.36 117 95.00 0.0082
2026-01-08 2025-12-31 13F OCCIDENTAL PETE COM 674599105 1,476 0 0.00 61 -13.04 0.0047
2025-10-08 2025-09-30 13F OCCIDENTAL PETE COM 674599105 1,476 0 0.00 70 11.29 0.0058
2025-07-10 2025-06-30 13F OCCIDENTAL PETE COM 674599105 1,476 0 0.00 62 -13.89 0.0057
2025-04-07 2025-03-31 13F OCCIDENTAL PETE COM 674599105 1,476 0 0.00 73 0.00 0.0070
2025-01-15 2024-12-31 13F Occidental Petroleum COM 674599105 1,476 0 0.00 73 -5.26 0.0068
2024-11-01 2024-09-30 13F Occidental Petroleum COM 674599105 1,476 0 0.00 76 -18.28 0.0073
2024-07-17 2024-06-30 13F Occidental Petroleum COM 674599105 1,476 -400 -21.32 93 -23.14 0.0097
2024-04-08 2024-03-31 13F Occidental Petroleum COM 674599105 1,876 0 0.00 122 8.04 0.0138
2024-01-08 2023-12-31 13F Occidental Petroleum COM 674599105 1,876 0 0.00 112 -7.44 0.0136
2023-11-21 2023-09-30 13F Occidental Petroleum COM 674599105 1,876 0 0.00 122 10.00 0.0192
2023-07-12 2023-06-30 13F Occidental Petroleum COM 674599105 1,876 0 0.00 110 -5.98 0.0173
2023-04-20 2023-03-31 13F Occidental Petroleum COM 674599105 1,876 0 0.00 117 0.0191
2023-01-06 2022-12-31 13F Occidental Petroleum COM 674599105 1,876 0 0.00 0 -100.00 0.0186
2022-10-13 2022-09-30 13F Occidental Petroleum COM 674599105 1,876 0 0.00 115 4.55 0.0194
2022-07-14 2022-06-30 13F Occidental Petroleum COM 674599105 1,876 0 0.00 110 3.77 0.0177
2022-05-12 2022-03-31 13F Occidental Petroleum COM 674599105 1,876 1,876 106 0.0149
2021-10-22 2021-09-30 13F OCCIDENTAL PETE CORP DEL COM EQUITIES/EXCHANGE TRADED FUNDS 674599105 0 -22 -100.00 0 -100.00
2021-06-09 2021-03-31 13F OCCIDENTAL PETE CORP DEL COM EQUITIES/EXCHANGE TRADED FUNDS 674599105 22 0 0.00 1 0.0002
2021-02-12 2020-12-31 13F/A-1 OCCIDENTAL PETE CORP DEL COM EQUITIES/EXCHANGE TRADED FUNDS 674599105 22 -337 -93.87 0 -100.00
2021-02-05 2020-12-31 13F OCCIDENTAL PETE CORP DEL COM US LARGE-CAP EQUITIES 674599105 652 293 8 336.7553
2020-10-23 2020-09-30 13F OCCIDENTAL PETE EQUITIES/EXCHANGE TRADED FUNDS 674599105 359 0 0.00 4 -42.86 0.0008
2020-07-29 2020-06-30 13F OCCIDENTAL PETE CORP DEL COM EQUITIES/EXCHANGE TRADED FUNDS 674599105 359 0 0.00 7 75.00 0.0015
2020-04-22 2020-03-31 13F OCCIDENTAL PETE CORP DEL COM EQUITIES/EXCHANGE TRADED FUNDS 674599105 359 -100 -21.79 4 -78.95 0.0009
2020-01-22 2019-12-31 13F/A-1 OCCIDENTAL PETE CORP DEL COM EQUITIES/EXCHANGE TRADED FUNDS 674599105 459 -94 -17.00 19 -24.00 0.0035
2020-01-15 2019-12-31 13F OCCIDENTAL PETE CORP DEL COM EQUITIES/EXCHANGE TRADED FUNDS 674599105 553 0 25 3,797.0838
2019-10-17 2019-09-30 13F OCCIDENTAL PETE CORP DEL COM EQUITIES/EXCHANGE TRADED FUNDS 674599105 553 -4,003 -87.86 25 -89.08 0.0051
2019-07-17 2019-06-30 13F OCCIDENTAL PETE CORP DEL COM EQUITIES/EXCHANGE TRADED FUNDS 674599105 4,556 -36,751 -88.97 229 -91.62 0.0460
2019-04-30 2019-03-31 13F/A-1 OCCIDENTAL PETE CORP DEL EQUITIES/EXCHANGE TRADED FUNDS 674599105 41,307 3,965 10.62 2,734 19.28 0.5194
2019-04-17 2019-03-31 13F OCCIDENTAL PETE CORP DEL COM EQUITIES/EXCHANGE TRADED FUNDS 674599105 36,197 -1,145 2,974
2019-01-22 2018-12-31 13F OCCIDENTAL PETE CORP DEL COM EQUITIES/EXCHANGE TRADED FUNDS 674599105 37,342 1,145 3.16 2,292 -22.93 0.5061
2018-10-18 2018-09-30 13F OCCIDENTAL PETE CORP DEL COM EQUITIES/EXCHANGE TRADED FUNDS 674599105 36,197 473 1.32 2,974 -0.50 0.6099
2018-07-18 2018-06-30 13F OCCIDENTAL PETE CORP DEL COM EQUITIES/EXCHANGE TRADED FUNDS 674599105 35,724 2 0.01 2,989 28.84 0.6442
2018-04-26 2018-03-31 13F OCCIDENTAL PETE CORP DEL COM EQUITIES/EXCHANGE TRADED FUNDS 674599105 35,722 -455 -1.26 2,320 -12.91 0.5197
2018-01-24 2017-12-31 13F OCCIDENTAL PETE CORP DEL COM EQUITIES/EXCHANGE TRADED FUNDS 674599105 36,177 661 1.86 2,664 16.84 0.6106
2017-10-17 2017-09-30 13F OCCIDENTAL PETE CORP DEL COM EQUITIES/EXCHANGE TRADED FUNDS 674599105 35,516 1,092 3.17 2,280 10.68 0.5399
2017-07-11 2017-06-30 13F OCCIDENTAL PETE CORP DEL COM EQUITIES/EXCHANGE TRADED FUNDS 674599105 34,424 1,249 3.76 2,060 -2.00 0.5184
2017-04-17 2017-03-31 13F/A-1 OCCIDENTAL PETE CORP DEL COM EQUITIES/EXCHANGE TRADED FUNDS 674599105 33,175 1,140 3.56 2,102 -7.85 0.5332
2017-04-17 2017-03-31 13F OCCIDENTAL PETE CORP DEL COM EQUITIES/EXCHANGE TRADED FUNDS 674599105 30,524 2,089
2017-01-10 2016-12-31 13F OCCIDENTAL PETE CORP DEL COM EQUITIES/EXCHANGE TRADED FUNDS 674599105 32,035 1,176 3.81 2,281 1.38 0.5974
2016-10-13 2016-09-30 13F OCCIDENTAL PETE CORP DEL COM EQUITIES/EXCHANGE TRADED FUNDS 674599105 30,859 575 1.90 2,250 -1.66 0.6446
2016-07-13 2016-06-30 13F OCCIDENTAL PETE CORP DEL COM EQUITIES/EXCHANGE TRADED FUNDS 674599105 30,284 -240 -0.79 2,288 9.53 0.6769
2016-04-20 2016-03-31 13F OCCIDENTAL PETE CORP DEL COM EQUITIES/EXCHANGE TRADED FUNDS 674599105 30,524 2,370 8.42 2,089 9.77 0.6601
2016-01-19 2015-12-31 13F OCCIDENTAL PETE CORP DEL COM EQUITIES/EXCHANGE TRADED FUNDS 674599105 28,154 815 2.98 1,903 5.25 0.6061
2015-10-16 2015-09-30 13F OCCIDENTAL PETE CORP DEL COM EQUITIES/EXCHANGE TRADED FUNDS 674599105 27,339 1,822 7.14 1,808 -8.87 0.5844
2015-07-14 2015-06-30 13F OCCIDENTAL PETE CORP DEL COM EQUITIES/EXCHANGE TRADED FUNDS 674599105 25,517 25,105 6,093.45 1,984 6,513.33 0.5392
2015-04-21 2015-03-31 13F/A-1 OCCIDENTAL PETE CORP DEL COM EQUITIES/EXCHANGE TRADED FUNDS 674599105 412 -323 -43.95 30 -49.15 0.0075
2015-04-14 2015-03-31 13F OCCIDENTAL PETE CORP DEL COM EQUITIES/EXCHANGE TRADED FUNDS 674599105 412 30
2015-01-15 2014-12-31 13F/A-1 OCCIDENTAL PETE CORP DEL COM EQUITIES/EXCHANGE TRADED FUNDS 674599105 735 -2,380 -76.40 59 -80.33 0.0147
2015-01-13 2014-12-31 13F OCCIDENTAL PETE CORP DEL COM EQUITIES/EXCHANGE TRADED FUNDS 674599105 300 27
2014-10-10 2014-09-30 13F OCCIDENTAL PETE CORP DEL COM EQUITIES/EXCHANGE TRADED FUNDS 674599105 3,115 -18 -0.57 300 -6.83 0.0786
2014-07-11 2014-06-30 13F OCCIDENTAL PETE CORP DEL EQUITIES/EXCHANGE TRADED FUNDS 674599105 3,133 0 0.00 322 7.69 0.0796
2014-04-10 2014-03-31 13F OCCIDENTAL PETE CORP DEL COM EQUITIES/EXCHANGE TRADED FUNDS 674599105 3,133 18 0.58 299 1.01 0.0757
2014-01-08 2013-12-31 13F OCCIDENTAL PETE CORP DEL COM EQUITIES/EXCHANGE TRADED FUNDS 674599105 3,115 0 0.00 296 1.72 0.0767
2013-10-11 2013-09-30 13F OCCIDENTAL PETE CORP DEL COM EQUITIES/EXCHANGE TRADED FUNDS 674599105 3,115 2,815 938.33 291 977.78 0.0813
2013-07-19 2013-06-30 13F OCCIDENTAL PETE CORP DEL COM EQUITIES/EXCHANGE TRADED FUNDS 674599105 300 300 27 0.0082
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.