THIS FILING LISTS SECURITIES HOLDINGS REPORTED ON THE FORM 13F FILED ON NOVEMBER 14, 2006 PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT AND FOR WHICH CONFIDENTIAL TREATMENT EXPIRED ON MAY 15, 2007. UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 13F Form 13F COVER PAGE Report for the Calendar Year or Quarter Ended: September 30, 2006 Check here if Amendment [X]; Amendment Number: 2 This Amendment (Check only one.): [ ] is a restatement. [X] adds new holdings entries. Institutional Investment Manager Filing this Report: Name: Berkshire Hathaway Inc. Address: 1440 Kiewit Plaza Omaha, NE 68131 Form 13F File Number: 28-4545 The institutional investment manager filing this report and the person by whom it is signed hereby represent that the person signing the report is authorized to submit it, that all information contained herein is true, correct and complete, and that it is understood that all required items, statements, schedules, lists, and tables, are considered integral parts of this form. Person Signing this Report on Behalf of Reporting Manager: Name: Marc D. Hamburg Title: Vice President Phone: 402-346-1400 Signature, Place, and Date of Signing: (s) Marc D. Hamburg Omaha, NE May 14, 2007 ----------------------- -------------------- --------------------- [Signature] [City, State] [Date] Report Type (Check only one.): [ ] 13F HOLDINGS REPORT. (Check here if all holdings of this reporting manager are reported in this report.) [ ] 13F NOTICE. (Check here if no holdings reported are in this report, and all holdings are reported by other reporting manager(s).) [X] 13F COMBINATION REPORT. (Check here if a portion of the holdings for this reporting manager are reported in this report and a portion are reported by other reporting manager(s).) List of Other Managers Reporting for this Manager: Form 13F File Number Name 28-5194 General Re - New England Asset Management, Inc. Form 13F SUMMARY PAGE Report Summary: Number of Other Included Managers: 4 --------------- Form 13F Information Table Entry Total: 3 --------------- Form 13F Information Table Value Total: $ 492,803 --------------- (thousands) List of Other Included Managers: Provide a numbered list of the name(s) and Form 13F file number(s) of all institutional investment managers with respect to which this report is filed, other than the manager filing this report. [If there are no entries in this list, state "NONE" and omit the column headings and list entries.] NO. FORM 13F FILE NUMBER NAME 1. 28-10388 BH Columbia Inc. 2. 28-554 Buffett, Warren E. 3. 28-1517 Columbia Insurance Company 4. 28-717 OBH Inc. BERKSHIRE HATHAWAY INC. Form 13F Information Table September 30, 2006 Column 6 Investment Discretion Column 8 Column 4 Column 5 -------------------------- Voting Authority Column 2 Column 3 Market Shares or (c) Column 7 ---------------------- Column 1 Title of CUSIP Value Principal (a) (b) Shared - Shared- Other (a) (b) (c) Name of Issuer Class Number (In Thousands) Amount Sole Defined Other Managers Sole Shared None -------------- -------- -------- -------------- --------- ---- ------------ ------- --------- ---- ------ ---- Burlington Northern Santa Fe Com 12189T 10 4 73,234 997,200 X 1, 2, 3, 4 997,200 Norfolk Southern Corp Com 655844 10 8 141,920 3,221,800 X 1, 2, 3, 4 3,221,800 Union Pacific Corp Com 907818 10 8 277,649 3,155,100 X 1, 2, 3, 4 3,155,100 -------- $492,803 ========