X0303 4 2011-02-25 0000045012 HALLIBURTON CO HAL 0001350890 Nunez Craig W 10200 BELLAIRE BLVD. 2NW-18C HOUSTON TX 77072 0 1 0 0 Senior Vice Pres. & Treasurer Common Stock 2011-02-25 4 S 0 14905 46.19 D 21060 D Common Stock 2011-02-25 4 M 0 6000 39.48 A 27060 D Common Stock 2011-02-25 4 S 0 6000 46.07 D 21060 D Common Stock 2011-02-25 4 M 0 6700 33.17 A 27760 D Common Stock 2011-02-25 4 S 0 6700 46.03 D 21060 D Common Stock 2011-02-25 4 M 0 5000 36.90 A 26060 D Common Stock 2011-02-25 4 S 0 5000 46.15 D 21060 D Common Stock 2011-02-25 4 M 0 6667 15.42 A 27727 D Common Stock 2011-02-25 4 S 0 6667 46.10 D 21060 D Common Stock 2011-02-25 4 M 0 2434 29.35 A 23494 D Common Stock 2011-02-25 4 S 0 2434 46.10 D 21060 D Option to Buy Common Stock 39.48 2011-02-25 4 M 0 6000 0 D 2006-02-01 2016-02-01 Common Stock 6000 0 D Option to Buy Common Stock 33.17 2011-02-25 4 M 0 6700 0 D 2006-12-06 2016-12-06 Common Stock 6700 0 D Option to Buy Common Stock 36.90 2011-02-25 4 M 0 5000 0 D 2007-12-05 2017-12-05 Common Stock 5000 0 D Option to Buy Common Stock 15.42 2011-02-25 4 M 0 6667 0 D 2008-12-02 2018-12-02 Common Stock 6667 3333 D Option to Buy Common Stock 29.35 2011-02-25 4 M 0 2434 0 D 2009-12-01 2019-12-01 Common Stock 2434 4866 D Option to Buy Common Stock 39.19 2010-12-01 2020-12-01 Common Stock 5300 5300 D The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $46.16 to $46.21, inclusive. The Reporting Person undertakes to provide to Halliburton Company, any security holder of Halliburton Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (1) to this Form 4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $46.04 to $46.10, inclusive. The Reporting Person undertakes to provide to Halliburton Company, any security holder of Halliburton Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (2) to this Form 4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $46.01 to $46.06, inclusive. The Reporting Person undertakes to provide to Halliburton Company, any security holder of Halliburton Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (3) to this Form 4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $46.15 to $46.16, inclusive. The Reporting Person undertakes to provide to Halliburton Company, any security holder of Halliburton Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (4) to this Form 4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $46.08 to $46.11, inclusive. The Reporting Person undertakes to provide to Halliburton Company, any security holder of Halliburton Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (5) to this Form 4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $46.091 to $46.11, inclusive. The Reporting Person undertakes to provide to Halliburton Company, any security holder of Halliburton Company, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (6) to this Form 4. Robert L. Hayter, by Power of Attorney 2011-02-28