股本结构

单位:万股
公告日期 2025-11-03 2025-08-01 2025-08-01 2025-05-02 2025-02-20 2024-08-08
证券总股本 11455.42 11495.40 11463.47 11446.22 11446.19 11441.84
普通股本 11455.42 11495.40 11463.47 11446.22 11446.19 11441.84
优先股 未披露 未披露 未披露 未披露 未披露 未披露
其他 未披露 未披露 未披露 未披露 未披露 未披露
变动日期 2025-09-30 2025-07-23 2025-06-30 2025-03-31 2024-12-31 2024-07-31
注释:中概股证券总股本=普通股股本/ 存托凭证比例

历史变动

公告日期 变动后普通股本(万股) 变动后优先股(万股) 变动原因 变动日期
2025-11-03 11455.42 未披露
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From June 30, 2025 to September 30, 2025 Issuance of common stock upon vesting of RSUs and settlement of PSUs, net of shares used for tax withholdings Purchase of shares under Stock Repurchase Program
2025-09-30
2025-08-01 11495.40 未披露 定期报告 2025-07-23
2025-08-01 11463.47 未披露
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From March 31, 2025 to June 30, 2025 Issuance of common stock under Employee Stock Purchase Plan Stock-based compensation expense
2025-06-30
2025-05-02 11446.22 未披露
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From December 31, 2024 to March 31, 2025 Issuance of common stock upon vesting of RSUs, net of shares used for tax withholdings
2025-03-31
2025-02-20 11446.19 未披露
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From December 31, 2023 to December 31, 2024 Issuance of common stock under Employee Stock Purchase Plan Issuance of common stock upon vesting of RSUs, net of shares used for tax withholdings Stock-based compensation expense Purchase of shares under Stock Repurchase Program
2024-12-31
2024-08-08 11441.84 未披露 定期报告 2024-07-31
2024-08-08 11406.89 未披露
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From March 31, 2024 to June 30, 2024 Purchase of shares under Stock Repurchase Program Issuance of common stock under Employee Stock Purchase Plan Stock-based compensation expense
2024-06-30
2024-05-03 11503.61 未披露 定期报告 2024-04-25
2024-04-04 11503.43 未披露 定期报告 2024-04-01
2024-05-03 11503.61 未披露
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From December 31, 2023 to March 31, 2024 Stock-based compensation expense Issuance of common stock upon vesting of RSUs, net of shares used for tax withholdings Purchase of shares under Stock Repurchase Program
2024-03-31
2024-02-22 11574.65 未披露 定期报告 2024-02-08
2024-02-22 11574.54 未披露
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From December 31, 2022 to December 31, 2023 Issuance of common stock under Employee Stock Purchase Plan Stock-based compensation expense Issuance of common stock upon vesting of RSUs, net of shares used for tax withholdings Issuance of common stock through cashless exercise of Warrants Purchase of shares under Stock Repurchase Program
2023-12-31
2023-11-03 11631.39 未披露
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From June 30, 2023 to September 30, 2023 Issuance of common stock upon vesting of RSUs, net of shares used for tax withholdings Purchase of shares under Stock Repurchase Program Issuance of common stock under Employee Stock Purchase Plan
2023-09-30
2023-08-03 11866.55 未披露 定期报告 2023-07-21
2023-08-03 11811.21 未披露
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From March 31, 2023 to June 30, 2023 Issuance of common stock under Employee Stock Purchase Plan Stock-based compensation expense Purchase of shares under Stock Repurchase Program Issuance of common stock upon vesting of RSUs, net of shares used for tax withholdings
2023-06-30
2023-04-28 12051.79 未披露
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From December 31, 2022 to March 31, 2023 Purchase of shares under Stock Repurchase Program
2023-03-31
2023-02-23 12193.17 未披露
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From December 31, 2021 to December 31, 2022 Purchase of shares under Stock Repurchase Program Issuance of common stock under Employee Stock Purchase Plan Issuance of common stock upon vesting of RSUs and settlement of PSUs, net of shares used for tax withholdings Stock-based compensation expense
2022-12-31
2022-11-04 12279.60 未披露
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From June 30, 2022 to September 30, 2022 Issuance of common stock upon vesting of RSUs and settlement of PSUs, net of shares used for tax withholdings Purchase of shares under Stock Repurchase Program
2022-09-30
2022-08-04 12259.39 未披露 定期报告 2022-07-20
2022-08-04 12195.93 未披露
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From March 31, 2022 to June 30, 2022 Issuance of common stock under Employee Stock Purchase Plan Stock-based compensation expense
2022-06-30
2022-04-29 12186.42 未披露
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From December 31, 2021 to March 31, 2022 Issuance of common stock upon vesting of RSUs, net of shares used for tax withholdings
2022-03-31
2022-02-25 12186.22 未披露
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From December 31, 2020 to December 31, 2021 Issuance of common stock under Employee Stock Purchase Plan Issuance of common stock upon vesting of RSUs and settlement of PSUs, net of shares used for tax withholdings Stock-based compensation expense Issuance of common stock through cashless exercise of Warrants
2021-12-31
2021-10-01 12147.38 未披露
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From June 30, 2021 to September 27, 2021 Issuance of common stock upon vesting of RSUs and settlement of PSUs, net of shares used for tax withholdings
2021-09-27
2021-07-30 12122.09 未披露 定期报告 2021-07-21
2021-07-30 12097.09 未披露
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From March 31, 2021 to June 30, 2021 Issuance of common stock under Employee Stock Purchase Plan Stock-based compensation expense Issuance of common stock through cashless exercise of Warrants
2021-06-30
2021-06-11 12066.04 未披露 定期报告 2021-06-08
2021-04-30 11779.78 未披露 定期报告 2021-04-21
2021-02-18 11474.23 未披露
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From December 31,2019 to December 31,2020 Issuance of common stock under Employee Stock Purchase Plan Issuance of common stock upon vesting of RSUs and settlement of PSUs, net of shares used for tax withholdings Stock-based compensation expense
2020-12-31
2020-10-30 11457.28 未披露
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From June 30, 2020 to September 30, 2020 Issuance of common stock upon vesting of RSUs and settlement of PSUs,net of shares used for tax withholdings
2020-09-30
2020-07-31 11445.89 未披露 定期报告 2020-07-23
2020-07-31 11355.33 未披露
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From March 31, 2020 to June 30, 2020 Issuance of common stock under Employee Stock Purchase Plan Stock-based compensation expense
2020-06-30
2020-04-29 11298.87 未披露
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from December 31, 2019 to March 31, 2020 Issuance of common stock upon vesting of RSUs, net of shares used for tax withholdings
2020-03-31
2020-02-20 11298.84 未披露 定期报告 2020-02-06
2020-02-20 11298.80 未披露
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From December 31, 2018 to December 31, 2019 Issuance of common stock under Employee Stock Purchase Plan Issuance of common stock upon vesting of RSUs, net of shares used for tax withholdings Stock-based compensation expense
2019-12-31
2019-11-01 11285.72 未披露
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from June 30, 2019 to July 23, 2019 Issuance of common stock upon vesting of RSUs, net of shares used for tax withholdings
2019-07-23
2019-08-02 11252.56 未披露
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from March 31, 2019 to June 30,2019 Issuance of common stock under Employee Stock Purchase Plan Stock-based compensation expense Issuance of common stock upon vesting of RSUs, net of shares used for tax withholdings
2019-06-30
2019-05-02 11224.45 未披露
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from December 31, 2018 to March 31, 2019 Issuance of common stock upon vesting of RSUs, net of shares used for tax withholdings
2019-03-31
2019-04-15 11224.33 未披露 定期报告 2019-03-01
2019-02-21 11224.32 未披露 定期报告 2019-02-07
2019-02-21 11224.20 未披露
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from December 31, 2017 to December 31, 2018 Issuance of common stock under Employee Stock Purchase Plan Issuance of common stock upon vesting of RSUs, net of shares used for tax withholdings Stock-based compensation expense
2018-12-31
2018-11-02 11214.28 未披露 定期报告 2018-10-24
2018-08-06 11213.76 未披露 定期报告 2018-08-02
2018-08-02 11213.76 未披露 定期报告 2018-07-25
2018-08-02 11184.70 未披露 定期报告 2018-06-30
2018-02-21 11168.70 未披露
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from December 31, 2016 to December 31, 2017 Issuance of common stock under Employee Stock Purchase Plan Issuance of common stock upon vesting of RSUs, net of shares used for tax withholdings Stock-based compensation expense
2017-12-31
2017-11-03 11162.40 未披露
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from December 31, 2016 to September 30, 2017 Issuance of common stock under Employee Stock Purchase Plan Issuance of common stock upon vesting of restricted stock units, net of shares used for tax withholdings Stock-based compensation expense
2017-09-30
2017-08-04 11162.34 未披露 定期报告 2017-07-26
2017-08-03 11145.35 未披露
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From December 31, 2016 to June 30, 2017 Issuance of common stock under Employee Stock Purchase Plan Issuance of common stock upon vesting of restricted stock units, net of shares used for tax withholdings Stock-based compensation expense
2017-06-30
2017-05-04 11125.82 未披露
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from December 31, 2016 to March 17,2017 Issuance of common stock upon vesting of restricted stock units, net of shares used for tax withholdings
2017-03-17
2017-03-21 11125.78 未披露 定期报告 2017-03-01
2017-02-23 11125.77 未披露 定期报告 2017-02-15
2017-02-23 11125.75 未披露
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from December 31, 2015 to December 31, 2016 Issuance of common stock under Employee Stock Purchase Plan Issuance of common stock upon vesting of RSUs and settlement of PSUs, net of shares used for tax withholdings Stock-based compensation expense Issuance of common stock from stock offerings, net of tax
2016-12-31
2016-11-02 8686.93 未披露 定期报告 2016-10-26
2016-11-02 8686.85 未披露
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from December 31, 2015 to September 30, 2016 Issuance of common stock under Employee Stock Purchase Plan Issuance of common stock upon vesting of RSUs and settlement of PSUs, net of shares used for tax withholdings Stock-based compensation expense Issuance of common stock from stock offering
2016-09-30
2016-08-03 6846.68 未披露 定期报告 2016-07-27
2016-08-02 6827.46 未披露 定期报告 2016-06-30
2016-05-04 6807.86 未披露 定期报告 2016-04-27
2016-02-24 6807.75 未披露 定期报告 2016-02-17
2016-02-24 6807.57 未披露
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From December 31, 2014 to December 31, 2015 Issuance of common stock under Employee Stock Purchase Plan Issuance of common stock upon vesting of RSUs and settlement of PSUs, net of shares used for tax withholdings Stock-based compensation expense
2015-12-31
2015-10-28 6797.48 未披露 定期报告 2015-10-21
2015-10-28 6796.87 未披露 定期报告 2015-09-30
2015-07-29 6795.04 未披露 定期报告 2015-07-22
2015-07-29 6759.86 未披露 定期报告 2015-06-30
2015-05-06 6746.42 未披露 定期报告 2015-03-31
2015-02-25 6746.31 未披露
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from December 31, 2013 to December 31, 2014 Issuance of common stock under Employee Stock Purchase Plan Issuance of common stock upon vesting of RSUs and settlement of PSUs, net of shares used for tax withholdings Issuance of common stock upon stock option exercises Stock-based compensation expense
2014-12-31
2014-10-29 6740.54 未披露 定期报告 2014-10-22
2014-10-29 6739.39 未披露 定期报告 2014-09-30
2014-07-30 6737.18 未披露 定期报告 2014-07-23
2014-07-30 6707.89 未披露 定期报告 2014-06-30
2014-04-30 6705.81 未披露 定期报告 2014-04-23
2014-02-19 6705.64 未披露
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from December 31, 2012 to December 31, 2013 Issuance of common stock under Employee Stock Purchase Plan Issuance of common stock upon vesting of RSUs and settlement of PSUs, net of shares used for tax withholdings Issuance of common stock upon stock option exercises Stock-based compensation expense
2013-12-31
2013-10-30 6698.81 未披露 定期报告 2013-10-23
2013-10-30 6697.21 未披露 定期报告 2013-09-30
2013-07-31 6692.88 未披露 定期报告 2013-07-25
2013-07-31 6639.00 未披露 定期报告 2013-06-30
2013-05-01 6627.58 未披露 定期报告 2013-04-25
2013-05-01 6624.94 未披露 定期报告 2013-03-31
2013-04-11 6622.92 未披露 定期报告 2013-03-25
2013-02-21 6620.59 未披露 定期报告 2013-02-14
2013-02-21 6619.52 未披露
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from December 31, 2011 to December 31, 2012 Issuance of common stock under Employee Stock Purchase Plan Issuance of common stock upon vesting of RSUs and settlement of PSUs, net of shares used for tax withholdings Issuance of common stock upon stock option exercises Conversion of 3.50% Senior Convertible Notes to common stock, including income tax benefit of conversion Stock-based compensation expense
2012-12-31
2012-11-01 6607.75 未披露 定期报告 2012-10-26
2012-11-01 6607.12 未披露 定期报告 2012-09-30
2012-08-03 6515.15 未披露 定期报告 2012-07-27
2012-08-02 6510.08 未披露 定期报告 2012-06-30
2012-05-03 6415.46 未披露 定期报告 2012-04-27
2012-05-03 6415.00 未披露 定期报告 2012-03-31
2012-02-23 6411.44 未披露 定期报告 2012-02-16
2012-02-23 6406.44 未披露
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from December 31, 2010 to December 31, 2011 Issuance of common stock under Employee Stock Purchase Plan Issuance of common stock upon vesting of RSUs and settlement of PSUs, net of shares used for tax withholdings Sale of common stock, including income tax benefit of stock option exercises Stock-based compensation expense
2011-12-31
2011-11-02 6400.07 未披露 定期报告 2011-10-25
2011-11-02 6399.88 未披露
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from Jan 1,2011 to Sep 30,2011 Issuance of common stock under Employee Stock Purchase Plan Issuance of common stock upon vesting of RSUs and settlement of PSUs, net of shares used for tax withholdings, including income tax benefit of RSUs and PSUs Sale of common stock, including income tax benefit of stock option exercises
2011-09-30
2011-08-03 6373.42 未披露 定期报告 2011-07-26
2011-08-03 6368.34 未披露
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from January 1 2011 to June 30 2011 Issuance of common stock under Employee Stock Purchase Plan Issuance of common stock upon vesting of RSUs, net of shares used for tax withholdings, including income tax benefit of RSUs Sale of common stock, including income tax benefit of stock option exercises Stock-based compensation expense
2011-06-30
2011-05-03 6362.69 未披露 定期报告 2011-04-26
2011-05-03 6361.79 未披露
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Issuance of common stock upon vesting of RSUs, net of shares used for tax withholdings, including income tax benefit of RSUs Sale of common stock, including income tax benefit of stock option exercises
2011-03-31
2011-02-25 6343.54 未披露 定期报告 2011-02-18
2011-02-25 6331.02 未披露
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from December 31, 2009 to December 31, 2010 Issuance of common stock under Employee Stock Purchase Plan Issuance of common stock upon settlement of RSUs following expiration of restriction period, net of shares used for tax withholdings, including income tax cost of RSUs Sale of common stock, including income tax benefit of stock option exercises Stock-based compensation expense
2010-12-31
2010-11-03 6305.53 未披露 定期报告 2010-10-27
2010-11-03 6304.50 未披露
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from December 31, 2009 to September 30, 2010 Issuance of common stock under Employee Stock Purchase Plan Issuance of common stock upon settlement of RSUs following expiration of restriction period, net of shares used for tax withholdings, including income tax cost of RSUs Sale of common stock, including income tax benefit of stock option exercises
2010-09-30
2010-08-03 6300.76 未披露 定期报告 2010-07-28
2010-08-03 6300.74 未披露
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from December 31, 2009 to June 30, 2010 Issuance of common stock under Employee Stock Purchase Plan Issuance of common stock upon settlement of RSUs following expiration of restriction period, net of shares used for tax withholdings, including income tax cost of RSUs Sale of common stock, including income tax benefit of stock option exercises
2010-06-30
2010-02-24 6277.77 未披露 定期报告 2010-02-16
2010-02-24 6277.22 未披露
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From December 31, 2008 to December 31, 2009 Issuance of common stock under Employee Stock Purchase Plan Issuance of common stock upon settlement of RSUs following expiration of restriction period,net of shares used for tax withholdings,including income tax cost of RSUs Sale of common stock, including income tax benefit of stock option exercises Stock-based compensation expense
2009-12-31
2009-02-24 6230.56 未披露 定期报告 2009-02-17
2009-02-24 6228.86 未披露
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From December 31, 2007 to December 31, 2008 Treasury stock purchases Issuance of common stock under Employee Stock Purchase Plan Issuance of common stock upon settlement of RSUs following expiration of restriction period,net of shares used for tax withholdings Sale of common stock, including income tax benefit of stock option exercises Stock-based compensation expense
2008-12-31
2008-02-22 6302.05 未披露 定期报告 2008-02-15
2008-02-22 6300.11 未披露
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From December 31, 2006 to December 31, 2007 Treasury stock purchases Conversion of 5.75% Senior Convertible Notes due 2022 to common stock, including income tax benefit of conversion Issuance of common stock under Employee Stock Purchase Plan Issuance of common stock upon settlement of RSUs following expiration of restriction period,net of shares used for tax withholdings Sale of common stock, including income tax benefit of stock option exercises Stock-based compensation expense
2007-12-31
2007-02-23 5500.44 未披露 定期报告 2007-02-16
2007-02-23 5500.17 未披露
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From December 31, 2005 to December 31, 2006 Treasury stock purchases Retirement of treasury stock Issuance of Directors’ shares from treasury Issuance of common stock under Employee Stock Purchase Plan Sale of common stock, including income ax benefit of stock option exercises Stock-based compensation expense
2006-12-31
2006-02-27 5695.39 未披露 定期报告 2006-02-15
2006-02-27 5676.17 未披露
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From December 31, 2004 to December 31, 2005 Treasury stock purchases Retirement of treasury stock Issuance for Employee Stock Purchase Plan Sale of common stock, net of income tax benefit of stock option exercises Directors' stock compensation In March 2005 the Board of Directors approved a two-for-one stock split in the form of a stock dividend whereby one additional common share of stock was distributed for each common share outstanding. The stock dividend was distributed on March 31, 2005, to shareholders of record as of the close of business on March 21, 2005.
2005-12-31
2005-02-25 2879.84 未披露 定期报告 2005-02-15
2005-02-25 2847.91 未披露
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From December 31, 2003 to December 31, 2004 Treasury stock purchases Retirement of treasury stock Issuance for Employee Stock Purchase Plan Sale of common stock, net of income tax benefit of stock option exercises Directors' stock compensation
2004-12-31
2004-02-27 2834.00 未披露 定期报告 2004-02-20
2004-02-27 2824.24 未披露
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From December 31, 2002 to December 31, 2003 Issuance for Employee Stock Purchase Plan Sale of common stock, net of income tax benefit of stock option exercises Directors' stock compensation
2003-12-31
2003-03-13 3143.39 未披露 定期报告 2003-03-03
2003-03-13 2797.32 未披露
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From December 31, 2001 to December 31, 2002 Issuance for Employee Stock Purchase Plan Sale of common stock, net of income tax benefit of stock option exercises Directors' stock compensation
2002-12-31
2002-03-19 2780.55 未披露 定期报告 2002-03-12
2002-03-19 2776.99 未披露
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From December 31, 2000 to December 31, 2001 Treasury stock purchases Issuance for Employee Stock Purchase Plan Sale of common stock, net of income tax benefit of stock option exercises Directors' stock compensation
2001-12-31
2001-03-23 2824.22 未披露 定期报告 2001-03-09
2001-03-23 2815.82 未披露
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From December 31, 1999 to December 31, 2000 Treasury stock purchases Issuance for Employee Stock Purchase Plan Sale of common stock, net of income tax benefit of stock option exercises Directors' stock compensation The stock split was distributed on September 5, 2000 to shareholders of record as of the close of business on August 21, 2000.
2000-12-31
2000-03-13 1376.14 未披露 定期报告 2000-03-02
2000-03-13 1376.42 未披露
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From December 31, 1998 to December 31, 1999 Treasury stock purchases Issuance for Employee Stock Purchase Plan Sale of common stock, net of income tax benefit of stock option exercises Directors' stock compensation Issuance of common stock for Acquisition of Nance Petroleum Corporation Issuance of common stock for Acquisition of King Ranch Energy, Inc
1999-12-31
1999-03-29 1082.71 未披露 定期报告 1999-03-15
1999-03-29 1084.46 未披露
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From December 31, 1997 to December 31, 1998 Issuance for Employee Stock Purchase Plan Directors' stock compensation Treasury stock purchases
1998-12-31
1998-03-25 1098.40 未披露 定期报告 1998-03-19
1998-03-25 1098.04 未披露
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From December 31, 1996 to December 31, 1997 Purchase and retirement of common stock Sale of common stock, net of income tax benefit of stock option exercises Directors' stock compensation
1997-12-31
1997-03-31 1094.28 未披露 定期报告 1997-03-21
1997-03-31 875.92 未披露
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From December 31, 1995 to December 31, 1996 Purchase and retirement of common stock Retirement of treasury stock
1996-12-31
From June 30, 2025 to September 30, 2025 Issuance of common stock upon vesting of RSUs and settlement of PSUs, net of shares used for tax withholdings Purchase of shares under Stock Repurchase Program
From March 31, 2025 to June 30, 2025 Issuance of common stock under Employee Stock Purchase Plan Stock-based compensation expense
From December 31, 2024 to March 31, 2025 Issuance of common stock upon vesting of RSUs, net of shares used for tax withholdings
From December 31, 2023 to December 31, 2024 Issuance of common stock under Employee Stock Purchase Plan Issuance of common stock upon vesting of RSUs, net of shares used for tax withholdings Stock-based compensation expense Purchase of shares under Stock Repurchase Program
From March 31, 2024 to June 30, 2024 Purchase of shares under Stock Repurchase Program Issuance of common stock under Employee Stock Purchase Plan Stock-based compensation expense
From December 31, 2023 to March 31, 2024 Stock-based compensation expense Issuance of common stock upon vesting of RSUs, net of shares used for tax withholdings Purchase of shares under Stock Repurchase Program
From December 31, 2022 to December 31, 2023 Issuance of common stock under Employee Stock Purchase Plan Stock-based compensation expense Issuance of common stock upon vesting of RSUs, net of shares used for tax withholdings Issuance of common stock through cashless exercise of Warrants Purchase of shares under Stock Repurchase Program
From June 30, 2023 to September 30, 2023 Issuance of common stock upon vesting of RSUs, net of shares used for tax withholdings Purchase of shares under Stock Repurchase Program Issuance of common stock under Employee Stock Purchase Plan
From March 31, 2023 to June 30, 2023 Issuance of common stock under Employee Stock Purchase Plan Stock-based compensation expense Purchase of shares under Stock Repurchase Program Issuance of common stock upon vesting of RSUs, net of shares used for tax withholdings
From December 31, 2022 to March 31, 2023 Purchase of shares under Stock Repurchase Program
From December 31, 2021 to December 31, 2022 Purchase of shares under Stock Repurchase Program Issuance of common stock under Employee Stock Purchase Plan Issuance of common stock upon vesting of RSUs and settlement of PSUs, net of shares used for tax withholdings Stock-based compensation expense
From June 30, 2022 to September 30, 2022 Issuance of common stock upon vesting of RSUs and settlement of PSUs, net of shares used for tax withholdings Purchase of shares under Stock Repurchase Program
From March 31, 2022 to June 30, 2022 Issuance of common stock under Employee Stock Purchase Plan Stock-based compensation expense
From December 31, 2021 to March 31, 2022 Issuance of common stock upon vesting of RSUs, net of shares used for tax withholdings
From December 31, 2020 to December 31, 2021 Issuance of common stock under Employee Stock Purchase Plan Issuance of common stock upon vesting of RSUs and settlement of PSUs, net of shares used for tax withholdings Stock-based compensation expense Issuance of common stock through cashless exercise of Warrants
From June 30, 2021 to September 27, 2021 Issuance of common stock upon vesting of RSUs and settlement of PSUs, net of shares used for tax withholdings
From March 31, 2021 to June 30, 2021 Issuance of common stock under Employee Stock Purchase Plan Stock-based compensation expense Issuance of common stock through cashless exercise of Warrants
From December 31,2019 to December 31,2020 Issuance of common stock under Employee Stock Purchase Plan Issuance of common stock upon vesting of RSUs and settlement of PSUs, net of shares used for tax withholdings Stock-based compensation expense
From June 30, 2020 to September 30, 2020 Issuance of common stock upon vesting of RSUs and settlement of PSUs,net of shares used for tax withholdings
From March 31, 2020 to June 30, 2020 Issuance of common stock under Employee Stock Purchase Plan Stock-based compensation expense
from December 31, 2019 to March 31, 2020 Issuance of common stock upon vesting of RSUs, net of shares used for tax withholdings
From December 31, 2018 to December 31, 2019 Issuance of common stock under Employee Stock Purchase Plan Issuance of common stock upon vesting of RSUs, net of shares used for tax withholdings Stock-based compensation expense
from June 30, 2019 to July 23, 2019 Issuance of common stock upon vesting of RSUs, net of shares used for tax withholdings
from March 31, 2019 to June 30,2019 Issuance of common stock under Employee Stock Purchase Plan Stock-based compensation expense Issuance of common stock upon vesting of RSUs, net of shares used for tax withholdings
from December 31, 2018 to March 31, 2019 Issuance of common stock upon vesting of RSUs, net of shares used for tax withholdings
from December 31, 2017 to December 31, 2018 Issuance of common stock under Employee Stock Purchase Plan Issuance of common stock upon vesting of RSUs, net of shares used for tax withholdings Stock-based compensation expense
from December 31, 2016 to December 31, 2017 Issuance of common stock under Employee Stock Purchase Plan Issuance of common stock upon vesting of RSUs, net of shares used for tax withholdings Stock-based compensation expense
from December 31, 2016 to September 30, 2017 Issuance of common stock under Employee Stock Purchase Plan Issuance of common stock upon vesting of restricted stock units, net of shares used for tax withholdings Stock-based compensation expense
From December 31, 2016 to June 30, 2017 Issuance of common stock under Employee Stock Purchase Plan Issuance of common stock upon vesting of restricted stock units, net of shares used for tax withholdings Stock-based compensation expense
from December 31, 2016 to March 17,2017 Issuance of common stock upon vesting of restricted stock units, net of shares used for tax withholdings
from December 31, 2015 to December 31, 2016 Issuance of common stock under Employee Stock Purchase Plan Issuance of common stock upon vesting of RSUs and settlement of PSUs, net of shares used for tax withholdings Stock-based compensation expense Issuance of common stock from stock offerings, net of tax
from December 31, 2015 to September 30, 2016 Issuance of common stock under Employee Stock Purchase Plan Issuance of common stock upon vesting of RSUs and settlement of PSUs, net of shares used for tax withholdings Stock-based compensation expense Issuance of common stock from stock offering
From December 31, 2014 to December 31, 2015 Issuance of common stock under Employee Stock Purchase Plan Issuance of common stock upon vesting of RSUs and settlement of PSUs, net of shares used for tax withholdings Stock-based compensation expense
from December 31, 2013 to December 31, 2014 Issuance of common stock under Employee Stock Purchase Plan Issuance of common stock upon vesting of RSUs and settlement of PSUs, net of shares used for tax withholdings Issuance of common stock upon stock option exercises Stock-based compensation expense
from December 31, 2012 to December 31, 2013 Issuance of common stock under Employee Stock Purchase Plan Issuance of common stock upon vesting of RSUs and settlement of PSUs, net of shares used for tax withholdings Issuance of common stock upon stock option exercises Stock-based compensation expense
from December 31, 2011 to December 31, 2012 Issuance of common stock under Employee Stock Purchase Plan Issuance of common stock upon vesting of RSUs and settlement of PSUs, net of shares used for tax withholdings Issuance of common stock upon stock option exercises Conversion of 3.50% Senior Convertible Notes to common stock, including income tax benefit of conversion Stock-based compensation expense
from December 31, 2010 to December 31, 2011 Issuance of common stock under Employee Stock Purchase Plan Issuance of common stock upon vesting of RSUs and settlement of PSUs, net of shares used for tax withholdings Sale of common stock, including income tax benefit of stock option exercises Stock-based compensation expense
from Jan 1,2011 to Sep 30,2011 Issuance of common stock under Employee Stock Purchase Plan Issuance of common stock upon vesting of RSUs and settlement of PSUs, net of shares used for tax withholdings, including income tax benefit of RSUs and PSUs Sale of common stock, including income tax benefit of stock option exercises
from January 1 2011 to June 30 2011 Issuance of common stock under Employee Stock Purchase Plan Issuance of common stock upon vesting of RSUs, net of shares used for tax withholdings, including income tax benefit of RSUs Sale of common stock, including income tax benefit of stock option exercises Stock-based compensation expense
Issuance of common stock upon vesting of RSUs, net of shares used for tax withholdings, including income tax benefit of RSUs Sale of common stock, including income tax benefit of stock option exercises
from December 31, 2009 to December 31, 2010 Issuance of common stock under Employee Stock Purchase Plan Issuance of common stock upon settlement of RSUs following expiration of restriction period, net of shares used for tax withholdings, including income tax cost of RSUs Sale of common stock, including income tax benefit of stock option exercises Stock-based compensation expense
from December 31, 2009 to September 30, 2010 Issuance of common stock under Employee Stock Purchase Plan Issuance of common stock upon settlement of RSUs following expiration of restriction period, net of shares used for tax withholdings, including income tax cost of RSUs Sale of common stock, including income tax benefit of stock option exercises
from December 31, 2009 to June 30, 2010 Issuance of common stock under Employee Stock Purchase Plan Issuance of common stock upon settlement of RSUs following expiration of restriction period, net of shares used for tax withholdings, including income tax cost of RSUs Sale of common stock, including income tax benefit of stock option exercises
From December 31, 2008 to December 31, 2009 Issuance of common stock under Employee Stock Purchase Plan Issuance of common stock upon settlement of RSUs following expiration of restriction period,net of shares used for tax withholdings,including income tax cost of RSUs Sale of common stock, including income tax benefit of stock option exercises Stock-based compensation expense
From December 31, 2007 to December 31, 2008 Treasury stock purchases Issuance of common stock under Employee Stock Purchase Plan Issuance of common stock upon settlement of RSUs following expiration of restriction period,net of shares used for tax withholdings Sale of common stock, including income tax benefit of stock option exercises Stock-based compensation expense
From December 31, 2006 to December 31, 2007 Treasury stock purchases Conversion of 5.75% Senior Convertible Notes due 2022 to common stock, including income tax benefit of conversion Issuance of common stock under Employee Stock Purchase Plan Issuance of common stock upon settlement of RSUs following expiration of restriction period,net of shares used for tax withholdings Sale of common stock, including income tax benefit of stock option exercises Stock-based compensation expense
From December 31, 2005 to December 31, 2006 Treasury stock purchases Retirement of treasury stock Issuance of Directors’ shares from treasury Issuance of common stock under Employee Stock Purchase Plan Sale of common stock, including income ax benefit of stock option exercises Stock-based compensation expense
From December 31, 2004 to December 31, 2005 Treasury stock purchases Retirement of treasury stock Issuance for Employee Stock Purchase Plan Sale of common stock, net of income tax benefit of stock option exercises Directors' stock compensation In March 2005 the Board of Directors approved a two-for-one stock split in the form of a stock dividend whereby one additional common share of stock was distributed for each common share outstanding. The stock dividend was distributed on March 31, 2005, to shareholders of record as of the close of business on March 21, 2005.
From December 31, 2003 to December 31, 2004 Treasury stock purchases Retirement of treasury stock Issuance for Employee Stock Purchase Plan Sale of common stock, net of income tax benefit of stock option exercises Directors' stock compensation
From December 31, 2002 to December 31, 2003 Issuance for Employee Stock Purchase Plan Sale of common stock, net of income tax benefit of stock option exercises Directors' stock compensation
From December 31, 2001 to December 31, 2002 Issuance for Employee Stock Purchase Plan Sale of common stock, net of income tax benefit of stock option exercises Directors' stock compensation
From December 31, 2000 to December 31, 2001 Treasury stock purchases Issuance for Employee Stock Purchase Plan Sale of common stock, net of income tax benefit of stock option exercises Directors' stock compensation
From December 31, 1999 to December 31, 2000 Treasury stock purchases Issuance for Employee Stock Purchase Plan Sale of common stock, net of income tax benefit of stock option exercises Directors' stock compensation The stock split was distributed on September 5, 2000 to shareholders of record as of the close of business on August 21, 2000.
From December 31, 1998 to December 31, 1999 Treasury stock purchases Issuance for Employee Stock Purchase Plan Sale of common stock, net of income tax benefit of stock option exercises Directors' stock compensation Issuance of common stock for Acquisition of Nance Petroleum Corporation Issuance of common stock for Acquisition of King Ranch Energy, Inc
From December 31, 1997 to December 31, 1998 Issuance for Employee Stock Purchase Plan Directors' stock compensation Treasury stock purchases
From December 31, 1996 to December 31, 1997 Purchase and retirement of common stock Sale of common stock, net of income tax benefit of stock option exercises Directors' stock compensation
From December 31, 1995 to December 31, 1996 Purchase and retirement of common stock Retirement of treasury stock