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Locator: 46891BRK.
https://www.barrons.com/articles/warren-buffetts-annual-letter-berkshire-wont-buy-occidental-827afda6?mod=bol-social-tw
https://www.wsj.com/finance/stocks/the-architect-of-berkshire-hathaway-warren-buffett-honors-charlie-munger-d3cf5d53?mod=hp_lead_pos1
Related: https://www.wsj.com/articles/j-b-hunt-to-buy-walmarts-intermodal-assets-in-a-shipping-agreement-840c7bf0?mod=hp_minor_pos13