William R. Klesse

Board Director

Director

Occidental Petroleum Corp Occidental Petroleum Corp /DE/

Insider activity · 24 months1 buy0 salesCumulative net flow

Nov 24 · 0 buys · 0 salesDec 24 · 0 buys · 0 salesJan 25 · 0 buys · 0 salesFeb 25 · 0 buys · 0 salesMar 25 · 0 buys · 0 salesApr 25 · 0 buys · 0 salesMay 25 · 0 buys · 0 salesJun 25 · 0 buys · 0 salesJul 25 · 0 buys · 0 salesAug 25 · 0 buys · 0 salesSept 25 · 0 buys · 0 salesOct 25 · 0 buys · 0 salesNov 25 · 0 buys · 0 salesDec 25 · 1 buy · 0 salesJan 26 · 0 buys · 0 salesFeb 26 · 0 buys · 0 salesMar 26 · 0 buys · 0 salesApr 26 · 0 buys · 0 salesMay 26 · 0 buys · 0 salesJun 26 · 0 buys · 0 salesJul 26 · 0 buys · 0 salesAug 26 · 0 buys · 0 salesSept 26 · 0 buys · 0 salesOct 26 · 0 buys · 0 sales

Total declarations

Company

▲ Purchases (1 ops.)

€166k

▼ Sales (0 ops.)

—

Latest filing published 17 Dec 2025 for OCCIDENTAL PETROLEUM CORP /DE/, €166k. Read the official filing

Filing timeline

BuySale

William R. Klesse

Insider track record

Disclosed buys

Disclosed sells

Not enough buy signals with a settled T+90 horizon to measure a track record yet.

Signal history

William R. Klesse: trading record in brief

This profile gathers the share dealings of William R. Klesse in Occidental Petroleum Corp /DE/, where the filings describe the role as board member. Between 10 May 2021 and 16 December 2025, the trades on record add up to 7 filings.

The open-market record is one-sided, with 1 purchase worth €166k and not one sale. Unlike grants, an open-market purchase is paid for by the insider, at the market price. Besides market trades, the filings include 6 share grants. 2025 to date brings 1 purchase and no sales.

On 17 December 2025 came the latest disclosure, an open-market purchase for €166k in Occidental Petroleum Corp /DE/. Filings reach the SEC (Form 4) feed a median of 2 days after the trade. For comparison, the SEC allows two business days to file a Form 4. Every figure here comes from the filings published by SEC (Form 4) and describes the past, not future prices; it is not investment advice.