股本结构

单位:万股
公告日期 2025-10-28 2025-10-28 2025-07-30 2025-07-30 2025-05-05 2025-05-05
证券总股本 9970.57 9970.00 9918.15 9900.00 9896.58 9900.00
普通股本 9970.57 9970.00 9918.15 9900.00 9896.58 9900.00
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 2025-10-21 2025-09-30 2025-07-24 2025-06-30 2025-04-30 2025-03-31
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
2025-10-28 9970.57 未披露 定期报告 2025-10-21
2025-10-28 9970.00 未披露
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From June 30, 2025 to September 30, 2025 Issuances of common stock under stock plans
2025-09-30
2025-07-30 9918.15 未披露 定期报告 2025-07-24
2025-07-30 9900.00 未披露
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From March 31, 2025 to June 30, 2025 Issuances of common stock under stock plans Repurchases of common stock
2025-06-30
2025-05-05 9896.58 未披露 定期报告 2025-04-30
2025-05-05 9900.00 未披露
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From December 31,2024 to March 31, 2025 Issuances of common stock under stock plans Repurchases of common stock
2025-03-31
2025-04-09 9893.82 未披露 定期报告 2025-03-24
2025-02-10 9970.35 未披露 定期报告 2025-02-05
2025-02-10 9940.00 未披露
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From December 31, 2023 to December 31, 2024 Issuances of common stock under stock plans Repurchases of common stock under accelerated buyback agreements
2024-12-31
2024-10-30 10124.69 未披露 定期报告 2024-10-24
2024-10-30 10120.00 未披露
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From June 30, 2024 to September 30, 2024 Issuances of common stock under stock plans
2024-09-30
2024-08-01 10097.62 未披露 定期报告 2024-07-26
2024-08-01 10090.00 未披露
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From March 31, 2024 to June 30, 2024 Issuances of common stock under stock plans
2024-06-30
2024-05-01 10063.72 未披露 定期报告 2024-04-25
2024-05-01 10060.00 未披露
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From December 31, 2023 to March 31, 2024 Issuances of common stock under stock plans
2024-03-31
2024-04-10 10058.05 未披露 定期报告 2024-03-25
2024-02-09 9950.75 未披露 定期报告 2024-02-05
2024-02-09 9870.00 未披露
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From December 31,2022 to December 31,2023 Issuances of common stock under stock plans
2023-12-31
2023-10-31 9825.19 未披露 定期报告 2023-10-25
2023-10-31 9820.00 未披露
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From June 30, 2023 to September 30, 2023 Issuances of common stock under stock plans
2023-09-30
2023-08-01 9765.25 未披露 定期报告 2023-07-26
2023-08-01 9760.00 未披露
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From March 31, 2023 to June 30, 2023 Issuances of common stock under stock plans
2023-06-30
2023-05-03 9757.48 未披露 定期报告 2023-04-26
2023-05-03 9750.00 未披露
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From December 31, 2022 to March 31, 2023 Issuances of common stock under stock plans
2023-03-31
2023-04-05 9752.56 未披露 定期报告 2023-03-20
2023-04-05 9752.51 未披露 定期报告 2023-03-15
2023-02-09 9658.79 未披露 定期报告 2023-01-31
2023-02-09 9650.00 未披露
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From December 31, 2021 to December 31, 2022 Issuances of common stock under stock plans
2022-12-31
2022-11-01 9613.44 未披露 定期报告 2022-10-28
2022-11-01 9610.00 未披露
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From June 30, 2022 to September 30, 2022 Issuances of common stock under stock plans
2022-09-30
2022-08-04 9563.93 未披露 定期报告 2022-07-28
2022-08-04 9560.00 未披露
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From March 31, 2022 to June 30, 2022 Issuances of common stock under stock plans
2022-06-30
2022-05-04 9557.67 未披露 定期报告 2022-04-28
2022-05-04 9550.00 未披露
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From December 31, 2021 to March 31, 2022 Issuances of common stock under stock plans
2022-03-31
2022-04-07 9550.92 未披露 定期报告 2022-03-15
2022-02-11 9524.27 未披露 定期报告 2022-02-07
2022-02-11 9490.00 未披露
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From December 31, 2020 to December 31, 2021 Issuances of common stock under stock plans
2021-12-31
2021-11-01 9486.67 未披露 定期报告 2021-10-27
2021-11-01 9480.00 未披露
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From June 30, 2021 to September 30, 2021 Issuances of common stock under stock plans
2021-09-30
2021-08-03 9464.64 未披露 定期报告 2021-07-28
2021-08-03 9460.00 未披露
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From March 31, 2021 to June 30, 2021 Issuances of common stock under stock plans
2021-06-30
2021-05-05 9454.60 未披露 定期报告 2021-04-29
2021-05-05 9450.00 未披露
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From December 31,2020 to March 31, 2021 Issuances of common stock under stock plans
2021-03-31
2021-04-09 9453.57 未披露 定期报告 2021-03-23
2021-02-05 9394.36 未披露 定期报告 2021-01-29
2021-02-05 9350.00 未披露
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From December 31,2019 to December 31,2020 Issuance of common stock for vested restricted stock units Issuance of common stock for stock option exercises Issuance of common stock for employee stock purchase plan
2020-12-31
2020-11-09 9342.92 未披露 定期报告 2020-11-04
2020-11-09 9340.00 未披露
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From June 30, 2020 to September 30, 2020 Issuance of common stock for stock options Issuance of common stock for employee stock purchase plan
2020-09-30
2020-08-03 9325.49 未披露 定期报告 2020-07-28
2020-08-03 9320.00 未披露
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from March 31, 2020 to June 30, 2020 Issuance of common stock for vested restricted stock options Issuance of common stock for stock option
2020-06-30
2020-05-06 9286.51 未披露 定期报告 2020-04-30
2020-05-06 9280.00 未披露
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from December 31, 2019 to March 31, 2020 Issuance of common stock for vested restricted stock units Issuance of common stock for stock option exercises
2020-03-31
2020-04-09 9277.94 未披露 定期报告 2020-03-15
2020-02-07 9229.24 未披露 定期报告 2020-01-31
2020-02-07 9227.20 未披露
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from December 31, 2018 to December 31, 2019 Issuance of common stock for vested restricted stock units Issuance of common stock for stock option exercises Issuance of common stock for employee stock purchase plan
2019-12-31
2019-11-04 9209.35 未披露 定期报告 2019-10-29
2019-11-04 9208.00 未披露
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from June 30, 2019 to September 30, 2019 Issuance of common stock for vested restricted stock units Issuance of common stock for stock option exercises Issuance of common stock for employee stock purchase plan
2019-09-30
2019-07-29 9157.94 未披露 定期报告 2019-07-24
2019-07-29 9153.60 未披露
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from March 31, 2019 to June 30,2019 Issuance of common stock for vested restricted stock units Issuance of common stock for stock option exercises
2019-06-30
2019-04-29 9128.69 未披露 定期报告 2019-04-24
2019-04-29 9128.40 未披露
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from December 31, 2018 to March 31, 2019 Issuance of common stock for vested restricted stock units Issuance of common stock for stock option exercises Issuance of common stock for employee stock purchase plan
2019-03-31
2019-04-17 9128.43 未披露 定期报告 2019-03-29
2019-04-17 9126.65 未披露 定期报告 2019-03-15
2019-02-08 9082.13 未披露 定期报告 2019-02-01
2019-02-08 9079.71 未披露
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from December 31, 2017 to December 31, 2018 Issuance of common stock for vested restricted stock units Issuance of common stock for stock option exercises
2018-12-31
2018-11-05 9068.22 未披露 定期报告 2018-10-30
2018-11-05 9067.32 未披露 定期报告 2018-09-30
2018-07-31 9046.94 未披露 定期报告 2018-07-25
2018-07-31 9040.32 未披露 定期报告 2018-06-30
2018-04-30 8989.79 未披露 定期报告 2018-04-25
2018-04-04 8988.21 未披露 定期报告 2018-03-29
2018-04-04 8970.89 未披露 定期报告 2018-02-28
2018-02-13 8927.35 未披露 定期报告 2018-02-02
2018-02-13 8879.39 未披露
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from December 31, 2016 to December 31, 2017 Issuance of common stock for restricted share units vested Issuance of common stock for option exercises
2017-12-31
2017-11-01 8849.30 未披露 定期报告 2017-10-27
2017-11-01 8846.20 未披露 定期报告 2017-09-30
2017-08-03 8822.17 未披露 定期报告 2017-07-27
2017-08-03 8821.69 未披露 定期报告 2017-06-30
2017-05-09 8807.50 未披露 定期报告 2017-05-03
2017-05-09 8751.99 未披露 定期报告 2017-03-31
2017-02-14 8711.43 未披露 定期报告 2017-02-01
2017-02-14 8688.33 未披露
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from DECEMBER 31, 2015 to DECEMBER 31, 2016 Issuance of common stock for restricted share units vested Issuance of common stock for option exercises
2016-12-31
2016-11-02 8687.13 未披露 定期报告 2016-10-27
2016-11-02 8686.61 未披露 定期报告 2016-09-30
2016-08-03 8675.16 未披露 定期报告 2016-06-30
2016-05-05 8665.60 未披露 定期报告 2016-04-29
2016-05-02 8662.47 未披露 定期报告 2016-04-12
2016-05-05 8657.31 未披露 定期报告 2016-03-31
2016-02-11 8645.30 未披露 定期报告 2016-02-01
2016-02-11 8626.26 未披露
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from December 31, 2014 to December 31, 2015 Issuance of common stock for restricted share units vested Issuance of common stock for option exercises Issuance of common stock, net of offering costs
2015-12-31
2015-10-29 8619.66 未披露 定期报告 2015-10-23
2015-10-29 8588.41 未披露 定期报告 2015-09-30
2015-07-29 8587.32 未披露 定期报告 2015-07-24
2015-07-29 8575.04 未披露 定期报告 2015-06-30
2015-04-30 8541.78 未披露 定期报告 2015-04-24
2015-04-30 8537.23 未披露 定期报告 2015-03-31
2015-02-09 7716.33 未披露 定期报告 2015-01-26
2015-02-09 7646.59 未披露
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from December 31, 2013 to December 31, 2014 Issuance of common stock for restricted share units vested Issuance of common stock for option exercises Issuance of common stock, net of offering costs
2014-12-31
2014-11-04 7600.52 未披露 定期报告 2014-10-27
2014-11-04 7599.64 未披露 定期报告 2014-09-30
2014-08-06 7591.94 未披露 定期报告 2014-07-31
2014-08-06 7591.90 未披露 定期报告 2014-06-30
2014-05-01 7586.30 未披露 定期报告 2014-04-25
2014-05-01 7585.87 未披露 定期报告 2014-03-31
2014-02-25 6780.23 未披露 定期报告 2014-02-20
2014-02-11 6779.37 未披露 定期报告 2014-01-24
2014-02-11 6735.12 未披露
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from DECEMBER 31, 2012 to DECEMBER 31, 2013 Issuance of common stock for option exercises
2013-12-31
2013-10-29 6734.34 未披露 定期报告 2013-10-23
2013-10-29 6734.32 未披露 定期报告 2013-09-30
2013-07-26 6706.23 未披露 定期报告 2013-07-19
2013-07-26 6699.81 未披露 定期报告 2013-06-30
2013-05-02 6673.24 未披露 定期报告 2013-04-26
2013-04-19 6671.20 未披露 定期报告 2013-04-01
2013-05-02 6671.24 未披露 定期报告 2013-03-31
2013-02-08 6650.93 未披露 定期报告 2013-01-31
2013-02-08 6644.69 未披露
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from DECEMBER 31, 2011 to DECEMBER 31, 2012 Issuance of common stock for restricted share units vested Issuance of common stock for option exercises Issuance of common stock, net of offering costs
2012-12-31
2012-11-20 6638.68 未披露 定期报告 2012-11-16
2012-10-31 6638.47 未披露 定期报告 2012-10-25
2012-10-31 6638.11 未披露 定期报告 2012-09-30
2012-07-31 6632.52 未披露 定期报告 2012-07-24
2012-07-31 6632.02 未披露 定期报告 2012-06-30
2012-05-02 6630.72 未披露 定期报告 2012-04-27
2012-05-02 6630.63 未披露 定期报告 2012-03-31
2012-02-09 6623.95 未披露 定期报告 2012-01-31
2012-02-09 5526.27 未披露
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from DECEMBER 31, 2010 to DECEMBER 31, 2011 Issuance of common stock for restricted share units vested Issuance of common stock for option exercises
2011-12-31
2011-10-31 5525.67 未披露 定期报告 2011-10-26
2011-10-31 5525.40 未披露 定期报告 2011-09-30
2011-07-29 5523.92 未披露 定期报告 2011-07-22
2011-07-29 5523.69 未披露 定期报告 2011-06-30
2011-05-03 5520.06 未披露 定期报告 2011-04-29
2011-05-03 5519.11 未披露 定期报告 2011-03-31
2011-02-10 5488.71 未披露 定期报告 2011-02-01
2011-02-10 5488.21 未披露
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from dec 31 2009 to dec 31 2010 Issuance of common stock for restricted share units vested Issuance of common stock for option exercises Issuance of common stock, net of offering costs
2010-12-31
2010-10-29 5486.25 未披露 定期报告 2010-10-25
2010-10-29 5484.97 未披露 定期报告 2010-09-30
2010-07-29 5484.22 未披露 定期报告 2010-07-23
2010-07-29 5484.10 未披露 定期报告 2010-06-30
2010-04-29 5483.19 未披露 定期报告 2010-04-26
2010-04-29 5482.36 未披露 定期报告 2010-03-31
2010-02-08 4406.19 未披露 定期报告 2010-01-29
2010-02-08 4399.16 未披露
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from DECEMBER 31, 2008 to DECEMBER 31, 2009 Issuance of common stock for restricted share units vested Issuance of common stock, net of offering costs
2009-12-31
2009-02-04 3867.38 未披露 定期报告 2009-01-23
2009-02-04 3859.88 未披露
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from DECEMBER 31, 2007 to DECEMBER 31, 2008 Issuance of common stock for restricted share units vested Issuance of common stock for option exercises
2008-12-31
2008-02-11 3827.40 未披露
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from DECEMBER 31, 2006 to DECEMBER 31, 2007 Issuance of common stock for restricted share units vested Issuance of common stock for option exercises
2007-12-31
2007-02-09 3790.60 未披露
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from DECEMBER 31, 2005 to DECEMBER 31, 2006 Issuance of common stock for exercise of warrants Issuance of common stock for option exercises Issuance of common stock pursuant to the Employee Stock Purchase Plan
2006-12-31
2006-02-07 3720.86 未披露 定期报告 2006-01-26
2006-02-07 3713.25 未披露
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from DECEMBER 31, 2004 to DECEMBER 31, 2005 Issuance of common stock for option exercises Issuance of common stock pursuant to the Employee Stock Purchase Plan
2005-12-31
2005-02-16 3659.75 未披露 定期报告 2005-02-11
2005-02-16 3653.28 未披露
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from DECEMBER 31, 2003 to DECEMBER 31, 2004 Issuance of common stock for option exercises Issuance of common stock pursuant to the Employee Stock Purchase Plan Issuance of common stock, related to royalty stream purchase Issuance of common stock for exercise of warrants
2004-12-31
2004-03-15 3533.44 未披露 定期报告 2004-02-27
2004-03-15 3531.19 未披露
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from DECEMBER 31, 2002 to DECEMBER 31, 2003 Issuance of common stock for option exercises Issuance of common stock pursuant to the Employee Stock Purchase Plan Issuance of common stock, net of offering costs Common shares issued as a stock bonus Issuance of common stock for exercise of warrants
2003-12-31
2003-03-04 3071.95 未披露 定期报告 2003-02-21
2003-03-04 3066.23 未披露
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from DECEMBER 31, 2001 to DECEMBER 31, 2002 Issuance of common stock for option exercises Issuance of common stock pursuant to the Employee Stock Purchase Plan
2002-12-31
2002-03-26 3039.96 未披露 定期报告 2002-03-15
2002-03-26 3034.77 未披露
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from DECEMBER 31, 2000 to DECEMBER 31, 2001 Issuance of common stock from exercise of warrants Issuance of common stock for notes Issuance of common stock from option exercises Issuance of common stock pursuant to the Employee Stock Purchase Plan Issuance of common stock, net of offering costs
2001-12-31
2001-03-30 2542.87 未披露 定期报告 2001-03-23
2001-03-30 2531.45 未披露
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from DECEMBER 31, 1999 to DECEMBER 31, 2000 Issuance of common stock for warrants Issuance of common stock for stock purchase agreement Issuance of common stock for option exercises Issuance of common stock pursuant to the Employee Stock Purchase Plan Issuance of common stock, net of offering costs
2000-12-31
2000-03-30 2183.05 未披露 定期报告 2000-03-15
2000-03-30 2160.80 未披露
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from DECEMBER 31, 1998 to DECEMBER 31, 1999 Issuance of common stock for option exercises Issuance of common stock pursuant to the Employee Stock Purchase Plan Issuance of common stock, net of offering costs
1999-12-31
1999-03-31 1896.06 未披露 定期报告 1999-03-15
1999-03-31 1893.09 未披露
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from DECEMBER 31, 1997 to DECEMBER 31, 1998 Issuance of common stock for warrants Issuance of common stock for option exercises Issuance of common stock pursuant to the Employee Stock Purchase Plan Issuance of common stock in exchange for NPI Preferred Stock Issuance of common stock for NNL Acquisition Issuance of common stock for milestone achievement
1998-12-31
1998-04-10 1770.78 未披露 定期报告 1998-02-27
1998-04-10 1768.68 未披露
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from December 31, 1996 to December 31,1997 Issuance of Common Stock for warrants Issuance of Common Stock for stock options Issuance of Common Stock under the Employee Stock Purchase Plan Issuance of Common Stock in exchange for investment in NPI
1997-12-31
1997-03-31 1684.63 未披露 定期报告 1997-02-28
1997-03-31 1677.66 未披露
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from December 31, 1995 to December 31, 1996 Issuance of Common Stock for cash
1996-12-31
From June 30, 2025 to September 30, 2025 Issuances of common stock under stock plans
From March 31, 2025 to June 30, 2025 Issuances of common stock under stock plans Repurchases of common stock
From December 31,2024 to March 31, 2025 Issuances of common stock under stock plans Repurchases of common stock
From December 31, 2023 to December 31, 2024 Issuances of common stock under stock plans Repurchases of common stock under accelerated buyback agreements
From June 30, 2024 to September 30, 2024 Issuances of common stock under stock plans
From March 31, 2024 to June 30, 2024 Issuances of common stock under stock plans
From December 31, 2023 to March 31, 2024 Issuances of common stock under stock plans
From December 31,2022 to December 31,2023 Issuances of common stock under stock plans
From June 30, 2023 to September 30, 2023 Issuances of common stock under stock plans
From March 31, 2023 to June 30, 2023 Issuances of common stock under stock plans
From December 31, 2022 to March 31, 2023 Issuances of common stock under stock plans
From December 31, 2021 to December 31, 2022 Issuances of common stock under stock plans
From June 30, 2022 to September 30, 2022 Issuances of common stock under stock plans
From March 31, 2022 to June 30, 2022 Issuances of common stock under stock plans
From December 31, 2021 to March 31, 2022 Issuances of common stock under stock plans
From December 31, 2020 to December 31, 2021 Issuances of common stock under stock plans
From June 30, 2021 to September 30, 2021 Issuances of common stock under stock plans
From March 31, 2021 to June 30, 2021 Issuances of common stock under stock plans
From December 31,2020 to March 31, 2021 Issuances of common stock under stock plans
From December 31,2019 to December 31,2020 Issuance of common stock for vested restricted stock units Issuance of common stock for stock option exercises Issuance of common stock for employee stock purchase plan
From June 30, 2020 to September 30, 2020 Issuance of common stock for stock options Issuance of common stock for employee stock purchase plan
from March 31, 2020 to June 30, 2020 Issuance of common stock for vested restricted stock options Issuance of common stock for stock option
from December 31, 2019 to March 31, 2020 Issuance of common stock for vested restricted stock units Issuance of common stock for stock option exercises
from December 31, 2018 to December 31, 2019 Issuance of common stock for vested restricted stock units Issuance of common stock for stock option exercises Issuance of common stock for employee stock purchase plan
from June 30, 2019 to September 30, 2019 Issuance of common stock for vested restricted stock units Issuance of common stock for stock option exercises Issuance of common stock for employee stock purchase plan
from March 31, 2019 to June 30,2019 Issuance of common stock for vested restricted stock units Issuance of common stock for stock option exercises
from December 31, 2018 to March 31, 2019 Issuance of common stock for vested restricted stock units Issuance of common stock for stock option exercises Issuance of common stock for employee stock purchase plan
from December 31, 2017 to December 31, 2018 Issuance of common stock for vested restricted stock units Issuance of common stock for stock option exercises
from December 31, 2016 to December 31, 2017 Issuance of common stock for restricted share units vested Issuance of common stock for option exercises
from DECEMBER 31, 2015 to DECEMBER 31, 2016 Issuance of common stock for restricted share units vested Issuance of common stock for option exercises
from December 31, 2014 to December 31, 2015 Issuance of common stock for restricted share units vested Issuance of common stock for option exercises Issuance of common stock, net of offering costs
from December 31, 2013 to December 31, 2014 Issuance of common stock for restricted share units vested Issuance of common stock for option exercises Issuance of common stock, net of offering costs
from DECEMBER 31, 2012 to DECEMBER 31, 2013 Issuance of common stock for option exercises
from DECEMBER 31, 2011 to DECEMBER 31, 2012 Issuance of common stock for restricted share units vested Issuance of common stock for option exercises Issuance of common stock, net of offering costs
from DECEMBER 31, 2010 to DECEMBER 31, 2011 Issuance of common stock for restricted share units vested Issuance of common stock for option exercises
from dec 31 2009 to dec 31 2010 Issuance of common stock for restricted share units vested Issuance of common stock for option exercises Issuance of common stock, net of offering costs
from DECEMBER 31, 2008 to DECEMBER 31, 2009 Issuance of common stock for restricted share units vested Issuance of common stock, net of offering costs
from DECEMBER 31, 2007 to DECEMBER 31, 2008 Issuance of common stock for restricted share units vested Issuance of common stock for option exercises
from DECEMBER 31, 2006 to DECEMBER 31, 2007 Issuance of common stock for restricted share units vested Issuance of common stock for option exercises
from DECEMBER 31, 2005 to DECEMBER 31, 2006 Issuance of common stock for exercise of warrants Issuance of common stock for option exercises Issuance of common stock pursuant to the Employee Stock Purchase Plan
from DECEMBER 31, 2004 to DECEMBER 31, 2005 Issuance of common stock for option exercises Issuance of common stock pursuant to the Employee Stock Purchase Plan
from DECEMBER 31, 2003 to DECEMBER 31, 2004 Issuance of common stock for option exercises Issuance of common stock pursuant to the Employee Stock Purchase Plan Issuance of common stock, related to royalty stream purchase Issuance of common stock for exercise of warrants
from DECEMBER 31, 2002 to DECEMBER 31, 2003 Issuance of common stock for option exercises Issuance of common stock pursuant to the Employee Stock Purchase Plan Issuance of common stock, net of offering costs Common shares issued as a stock bonus Issuance of common stock for exercise of warrants
from DECEMBER 31, 2001 to DECEMBER 31, 2002 Issuance of common stock for option exercises Issuance of common stock pursuant to the Employee Stock Purchase Plan
from DECEMBER 31, 2000 to DECEMBER 31, 2001 Issuance of common stock from exercise of warrants Issuance of common stock for notes Issuance of common stock from option exercises Issuance of common stock pursuant to the Employee Stock Purchase Plan Issuance of common stock, net of offering costs
from DECEMBER 31, 1999 to DECEMBER 31, 2000 Issuance of common stock for warrants Issuance of common stock for stock purchase agreement Issuance of common stock for option exercises Issuance of common stock pursuant to the Employee Stock Purchase Plan Issuance of common stock, net of offering costs
from DECEMBER 31, 1998 to DECEMBER 31, 1999 Issuance of common stock for option exercises Issuance of common stock pursuant to the Employee Stock Purchase Plan Issuance of common stock, net of offering costs
from DECEMBER 31, 1997 to DECEMBER 31, 1998 Issuance of common stock for warrants Issuance of common stock for option exercises Issuance of common stock pursuant to the Employee Stock Purchase Plan Issuance of common stock in exchange for NPI Preferred Stock Issuance of common stock for NNL Acquisition Issuance of common stock for milestone achievement
from December 31, 1996 to December 31,1997 Issuance of Common Stock for warrants Issuance of Common Stock for stock options Issuance of Common Stock under the Employee Stock Purchase Plan Issuance of Common Stock in exchange for investment in NPI
from December 31, 1995 to December 31, 1996 Issuance of Common Stock for cash