Occidental Petroleum Corporation
US ˙ NYSE ˙ US6745991058

SecurityOXY / Occidental Petroleum Corporation
InstitutionAssenagon Asset Management S.A.
Latest Disclosed Ownership399,157 shares
Latest Disclosed Value $ 25,945,205
Assenagon Asset Management S.A. ownership in OXY / Occidental Petroleum Corporation

On April 20, 2026 - Assenagon Asset Management S.A. filed a 13F-HR form disclosing ownership of 399,157 shares of Occidental Petroleum Corporation (US:OXY) valued at $25,945,205 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 9, 2026 disclosing 101,934 shares of Occidental Petroleum Corporation. This represents a change in shares of 291.58% during the quarter. The current value of the position is $22,724,008 USD.

Assenagon Asset Management S.A. has a history of taking positions in derivatives of the underlying security (OXY) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD and put options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

OXY / Occidental Petroleum Corporation Historical Put/Call Ratio
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)
2026-04-20 2026-03-31 13F OCCIDENTAL PETE COM 674599105 399,157 297,223 291.58 25,945 519.06 0.0394
2026-01-09 2025-12-31 13F OCCIDENTAL PETE COM 674599105 101,934 -18,604 -15.43 4,192 -26.41 0.0058
2025-10-07 2025-09-30 13F OCCIDENTAL PETE COM 674599105 120,538 -93,564 -43.70 5,695 -36.68 0.0078
2025-07-11 2025-06-30 13F OCCIDENTAL PETE COM 674599105 214,102 48,118 28.99 8,994 9.79 0.0134
2025-04-15 2025-03-31 13F OCCIDENTAL PETE COM 674599105 165,984 -125,452 -43.05 8,193 -43.11 0.0137
2025-01-14 2024-12-31 13F OCCIDENTAL PETE COM 674599105 291,436 273,939 1,565.63 14,400 1,498.11 0.0232
2024-10-23 2024-09-30 13F OCCIDENTAL PETE COM 674599105 17,497 -163 -0.92 902 -19.05 0.0017
2024-07-18 2024-06-30 13F OCCIDENTAL PETE COM 674599105 17,660 969 5.81 1,113 2.68 0.0025
2024-04-24 2024-03-31 13F OCCIDENTAL PETE COM 674599105 16,691 -215,208 -92.80 1,085 -92.17 0.0026
2024-01-17 2023-12-31 13F OCCIDENTAL PETE COM 674599105 231,899 215,091 1,279.69 13,847 1,170.28 0.0368
2023-11-06 2023-09-30 13F OCCIDENTAL PETE COM 674599105 16,808 1,097 6.98 1,091 18.09 0.0034
2023-07-25 2023-06-30 13F OCCIDENTAL PETE COM 674599105 15,711 -536,169 -97.15 924 -97.32 0.0032
2023-04-18 2023-03-31 13F OCCIDENTAL PETE COM 674599105 551,880 528,746 2,285.58 34,454 3,445,200.00 0.1223
2023-01-12 2022-12-31 13F OCCIDENTAL PETE COM 674599105 23,134 0 0.00 1 -99.93 0.0053
2022-10-27 2022-09-30 13F OCCIDENTAL PETE COM 674599105 23,134 15,288 194.85 1,422 207.79 0.0055
2022-07-27 2022-06-30 13F OCCIDENTAL PETE COM 674599105 7,846 952 13.81 462 18.16 0.0017
2022-04-25 2022-03-31 13F OCCIDENTAL PETE COM 674599105 6,894 6,894 391 0.0011
2020-07-21 2020-06-30 13F OCCIDENTAL PETE COM 674599105 0 -28,059 -100.00 0 -100.00
2020-04-17 2020-03-31 13F OCCIDENTAL PETE COM 674599105 28,059 -23,373 -45.44 325 -84.67 0.0026
2020-01-17 2019-12-31 13F OCCIDENTAL PETE COM 674599105 51,432 -97,089 -65.37 2,120 -67.90 0.0133
2019-10-16 2019-09-30 13F OCCIDENTAL PETE COM 674599105 148,521 121,821 456.26 6,605 392.18 0.0442
2019-08-12 2019-06-30 13F OCCIDENTAL PETE COM 674599105 26,700 -113,467 -80.95 1,342 -85.54 0.0101
2019-04-26 2019-03-31 13F OCCIDENTAL PETE COM 674599105 140,167 128,067 1,058.40 9,279 1,148.86 0.0871
2019-01-23 2018-12-31 13F OCCIDENTAL PETE CORP DEL COM 674599105 12,100 -104,239 -89.60 743 -92.23 0.0084
2018-10-29 2018-09-30 13F OCCIDENTAL PETE CORP DEL COM 674599105 116,339 75,679 186.13 9,560 181.01 0.0944
2018-07-17 2018-06-30 13F OCCIDENTAL PETE CORP DEL COM 674599105 40,660 5,472 15.55 3,402 48.82 0.0393
2018-04-30 2018-03-31 13F OCCIDENTAL PETE CORP DEL COM 674599105 35,188 -55,308 -61.12 2,286 -65.71 0.0298
2018-01-25 2017-12-31 13F OCCIDENTAL PETE CORP DEL COM 674599105 90,496 -205,715 -69.45 6,666 -64.95 0.0686
2017-10-18 2017-09-30 13F OCCIDENTAL PETE CORP DEL COM 674599105 296,211 296,211 19,020 0.1766
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2017-07-19 2017-06-30 13F OCCIDENTAL PETE CORP DEL CALL Call 0 -100.00 0 -100.00 n/a n/a n/a
2017-05-04 2017-03-31 13F OCCIDENTAL PETE CORP DEL CALL Call 150,000 0.00 9,504 -11.05 n/a n/a n/a
2017-02-27 2016-12-31 13F OCCIDENTAL PETE CORP DEL CALL Call 150,000 10,685 n/a n/a n/a
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2025-04-15 2025-03-31 13F OCCIDENTAL PETE PUT Put 0 -100.00 0 -100.00 n/a n/a n/a
2025-01-14 2024-12-31 13F OCCIDENTAL PETE PUT Put 400,000 0.00 19,764 -4.13 n/a n/a n/a
2024-10-23 2024-09-30 13F OCCIDENTAL PETE PUT Put 400,000 0.00 20,616 -18.23 n/a n/a n/a
2024-07-18 2024-06-30 13F OCCIDENTAL PETE PUT Put 400,000 25,212 n/a n/a n/a
2017-07-19 2017-06-30 13F OCCIDENTAL PETE CORP DEL PUT Put 0 -100.00 0 -100.00 n/a n/a n/a
2017-05-04 2017-03-31 13F OCCIDENTAL PETE CORP DEL PUT Put 150,000 0.00 9,504 -11.05 n/a n/a n/a
2017-02-27 2016-12-31 13F OCCIDENTAL PETE CORP DEL PUT Put 150,000 10,685 n/a n/a n/a
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.