Comparable stake leader
VANGUARD GROUP INC
SEC ownership of OCCIDENTAL PETROLEUM CORP /DE/
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0000797468.
Disclosed value leader
BERKSHIRE HATHAWAY INC
Comparable rows
1/3
Latest evidence
31 Mar 2025
- Public ticker
- OXY, OXY-WT on NYSE
- Parsed ownership sources
-
13D/G and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
VANGUARD GROUP INC
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
1 of 3
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
VANGUARD GROUP INC
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
31 Mar 2025
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0000797468
- Issuer location
- Houston, TX
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of OCCIDENTAL PETROLEUM CORP /DE/ (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
VANGUARD GROUP INC
Disclosed value leader
BERKSHIRE HATHAWAY INC
Comparable rows
1/3
Latest evidence
31 Mar 2025
13D/G
3/4/5
Lead comparable stake: 8.5%
2 rows are not safely comparable across share classes.
13D/G row: VANGUARD GROUP INC
Quick read
VANGUARD GROUP INC leads the comparable SEC ownership view at 8.5%.
1 of 3 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens VANGUARD GROUP INC's linked filing trail.
Comparable ownership
Top 1
VANGUARD GROUP INC
8.5%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-3 of 3 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| VANGUARD GROUP INC |
13D/G
The Vanguard Group
|
8.5%
|
—
80,230,985 shares
|
$0 | 31 Mar 2025 |
| BERKSHIRE HATHAWAY INC |
3/4/5
10%+ Owner
|
—
mixed-class rows
|
$14,342,667,505
348,885,177 shares
mixed-class rows
|
— | 07 Feb 2025 |
| Warren E. Buffett |
3/4/5
10%+ Owner
|
—
mixed-class rows
|
$14,342,667,505
348,885,177 shares
mixed-class rows
|
— | 07 Feb 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Insider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 26 Aug 2025.
Buys
$0
Insiders: 0
Sells
$0
Insiders: 0
Net
$0
Shares: 0
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 0
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-2 of 2 reporting-owner rows connected to OCCIDENTAL PETROLEUM CORP /DE/. Open a relationship link for the CIK-to-CIK filing trail.
Rows
2
Largest Forms 3/4/5 holder
BERKSHIRE HATHAWAY INC
Net 12M change
$0
Latest report
07 Feb 2025
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| BERKSHIRE HATHAWAY INC | 10%+ Owner | $14,342,667,505 | Mixed | 07 Feb 2025 | ||
| Warren E. Buffett | 10%+ Owner | $14,342,667,505 | Mixed | 07 Feb 2025 |
Recent insider transactions for OCCIDENTAL PETROLEUM CORP /DE/
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| No insider transactions were found in the last 12 months for this issuer. | ||||||||||
* marks a reported price that did not pass the local price check.