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向上 向下

股本结构

单位:万股
公告日期 2026-08-07 2026-08-07 2026-05-06 2026-04-27 2026-04-27 2026-05-06
证券总股本 6857.54 6830.00 6819.10 6809.55 6809.52 6810.00
普通股本 6857.54 6830.00 6819.10 6809.55 6809.52 6810.00
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 2026-07-29 2026-06-28 2026-04-28 2026-04-20 2026-04-10 2026-03-29
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
2026-08-07 6857.54 未披露 定期报告 2026-07-29
2026-08-07 6830.00 未披露
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From March 29, 2026 to June 28, 2026 Issuance of common stock under equity compensation plans
2026-06-28
2026-05-06 6819.10 未披露 定期报告 2026-04-28
2026-04-27 6809.55 未披露 定期报告 2026-04-20
2026-04-27 6809.52 未披露 定期报告 2026-04-10
2026-05-06 6810.00 未披露
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From December 28, 2025 to March 29, 2026 Issuance of common stock under equity compensation plans
2026-03-29
2026-02-19 6808.18 未披露 定期报告 2026-02-11
2026-02-19 6790.00 未披露
更多>>
From December 29, 2024 to December 28, 2025 Issuance of common stock under equity compensation plans Tax withholdings related to vesting of stock-based awards
2025-12-28
2025-11-06 6793.15 未披露 定期报告 2025-10-29
2025-11-06 6790.00 未披露
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From June 29, 2025 to September 28, 2025 Issuance of common stock under equity compensation plans
2025-09-28
2025-08-06 6790.05 未披露 定期报告 2025-07-30
2025-08-06 6770.00 未披露
更多>>
From March 30, 2025 to June 29, 2025 Issuance of common stock under equity compensation plans Tax withholdings related to vesting of stock-based awards
2025-06-29
2025-05-08 6762.59 未披露 定期报告 2025-04-30
2025-05-08 6750.00 未披露
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From December 29, 2024 to March 30, 2025 Issuance of common stock under equity compensation plans
2025-03-30
2025-04-08 6745.46 未披露 定期报告 2025-03-24
2025-04-08 6744.75 未披露 定期报告 2025-02-28
2025-02-27 6744.65 未披露 定期报告 2025-02-19
2025-02-27 6730.00 未披露
更多>>
From December 31, 2023 to December 29, 2024 Issuance of common stock under equity compensation plans Tax withholdings related to vesting of stock-based awards
2024-12-29
2024-11-08 6725.67 未披露 定期报告 2024-10-30
2024-11-08 6720.00 未披露
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From June 30, 2024 to September 29, 2024 Issuance of common stock under equity compensation plans
2024-09-29
2024-08-01 6723.54 未披露 定期报告 2024-07-24
2024-08-01 6710.00 未披露
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From March 31, 2024 to June 30, 2024 Issuance of common stock under equity compensation plans Tax withholdings related to vesting of stock-based awards
2024-06-30
2024-05-09 6697.18 未披露 定期报告 2024-05-01
2024-05-09 6680.00 未披露
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From December 31, 2023 to March 31, 2024 Issuance of common stock under equity compensation plans Tax withholdings related to vesting of stock-based awards
2024-03-31
2024-04-02 6687.87 未披露 定期报告 2024-03-18
2024-02-29 6684.95 未披露 定期报告 2024-02-22
2024-02-29 6670.00 未披露
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From January 1, 2023 to December 31,2023 Issuance of common stock under equity compensation plans Tax withholdings related to vesting of stock-based awards Repurchases of common stock
2023-12-31
2023-11-02 6681.87 未披露 定期报告 2023-10-25
2023-11-02 6680.00 未披露 定期报告 2023-10-01
2023-08-09 6679.06 未披露 定期报告 2023-08-01
2023-08-09 6680.00 未披露
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From April 2, 2023 to July 2, 2023 Issuance of common stock under equity compensation plans
2023-07-02
2023-05-04 6663.35 未披露 定期报告 2023-04-25
2023-05-04 6660.00 未披露
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From January 1, 2023 to April 2, 2023 Issuance of common stock under equity compensation plans Tax withholdings related to vesting of stock-based awards
2023-04-02
2023-04-05 6659.31 未披露 定期报告 2023-03-20
2023-02-23 6650.55 未披露 定期报告 2023-02-10
2023-02-23 6640.00 未披露
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From January 2, 2022 to January 1, 2023 Issuance of shares in connection with the Combinations Issuance of common stock under equity compensation plans Tax withholdings related to vesting of stock-based awards Repurchases of common stock
2023-01-01
2022-11-04 6604.54 未披露 定期报告 2022-10-25
2022-11-04 6600.00 未披露
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From July 3, 2022 to October 2, 2022 Repurchases of common stock
2022-10-02
2022-08-05 6695.29 未披露 定期报告 2022-07-27
2022-08-05 6700.00 未披露
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From April 3, 2022 to July 3, 2022 Issuance of common stock under equity compensation plans Issuance of shares in connection with the Combinations
2022-07-03
2022-06-06 6692.06 未披露 定期报告 2022-05-27
2022-05-05 4184.83 未披露 定期报告 2022-04-28
2022-05-05 4184.60 未披露
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From December 31, 2021 to March 31, 2022 Issuance of common stock under equity compensation plans Tax withholdings related to vesting of stock-based awards
2022-03-31
2022-03-11 4181.27 未披露 定期报告 2022-03-04
2022-02-18 4177.86 未披露 定期报告 2022-02-11
2022-02-18 4168.60 未披露
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From December 31, 2020 to December 31, 2021 Issuance of common stock under equity compensation plans Tax withholdings related to vesting of stock-based awards Repurchases of common stock
2021-12-31
2021-12-23 4168.59 未披露 定期报告 2021-12-22
2021-11-05 4167.47 未披露 定期报告 2021-10-29
2021-11-05 4167.20 未披露
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From June 30, 2021 to September 30, 2021 Issuance of common stock under equity compensation and benefit plans Tax withholdings related to vesting of stock-based awards
2021-09-30
2021-08-06 4163.28 未披露 定期报告 2021-07-30
2021-08-06 4163.30 未披露
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From March 31, 2021 to June 30, 2021 Issuance of common stock under equity compensation plans Tax withholdings related to vesting of stock-based awards Repurchases of common stock
2021-06-30
2021-05-07 4255.08 未披露 定期报告 2021-04-30
2021-05-07 4254.30 未披露
更多>>
From December 31, 2020 to March 31, 2021 Issuance of common stock under equity compensation plans Tax withholdings related to vesting of stock-based awards
2021-03-31
2021-04-15 4254.28 未披露 定期报告 2021-03-24
2021-02-19 4231.91 未披露 定期报告 2021-02-05
2021-02-19 4229.00 未披露
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from December 31, 2019 to December 31, 2020 Issuance of common stock under equity compensation plans Issuance of shares in exchange for Convertible Senior Notes Repurchases of common stock
2020-12-31
2020-10-30 4206.76 未披露 定期报告 2020-10-23
2020-10-30 4203.70 未披露
更多>>
From June 30, 2020 to September 30, 2020 Issuance of common stock under equity compensation and benefit plans Issuance of shares in exchange for Convertible Senior Notes Repurchases of common stock
2020-09-30
2020-07-31 4195.01 未披露 定期报告 2020-07-24
2020-07-31 4194.90 未披露
更多>>
From March 31, 2020 to June 30, 2020 Issuance of common stock under equity compensation plans Issuance of shares in exchange for Convertible Senior Notes Repurchases of common stock
2020-06-30
2020-05-07 4199.90 未披露 定期报告 2020-05-01
2020-05-07 4199.60 未披露
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from December 31, 2019 to March 31, 2020 Issuance of common stock under equity compensation plans Repurchases of common stock
2020-03-31
2020-04-09 4199.55 未披露 定期报告 2020-03-18
2020-02-13 4188.00 未披露 定期报告 2020-02-07
2020-02-13 4186.80 未披露
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from December 31, 2018 to December 31, 2019 Issuance of common stock under equity compensation plans Issuance of shares in exchange for Convertible Senior Notes Repurchases of common stock
2019-12-31
2019-10-31 4165.21 未披露 定期报告 2019-10-25
2019-10-31 4164.20 未披露
更多>>
from June 30, 2019 to September 30, 2019 Issuance of common stock under equity compensation and benefit plans Repurchases of common stock
2019-09-30
2019-08-09 4144.15 未披露 定期报告 2019-07-31
2019-08-09 4141.80 未披露
更多>>
From March 31, 2019 to June 30, 2019 Issuance of common stock under equity compensation and benefit plans Issuance of shares in exchange for Convertible Senior Notes Repurchases of common stock
2019-06-30
2019-05-09 3981.77 未披露 定期报告 2019-05-03
2019-05-09 3980.60 未披露
更多>>
from December 31, 2018 to March 31, 2019 Issuance of common stock under equity compensation plans Repurchases of common stock
2019-03-31
2019-04-11 3976.74 未披露 定期报告 2019-03-20
2019-02-15 3944.67 未披露 定期报告 2019-02-08
2019-02-15 3938.60 未披露
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from December 31, 2017 to December 31, 2018 Issuance of common stock under equity compensation plans Issuance of shares in exchange for Convertible Senior Notes Repurchases of common stock
2018-12-31
2018-11-07 3933.71 未披露 定期报告 2018-11-01
2018-11-07 3932.60 未披露 定期报告 2018-09-30
2018-08-08 3904.78 未披露 定期报告 2018-08-01
2018-08-08 3900.10 未披露 定期报告 2018-06-30
2018-05-09 3745.65 未披露 定期报告 2018-05-02
2018-05-09 3741.10 未披露 定期报告 2018-03-31
2018-04-12 3728.15 未披露 定期报告 2018-03-21
2018-02-27 3485.25 未披露 定期报告 2018-02-21
2018-02-27 3454.00 未披露
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from December 31, 2016 to December 31, 2017 Issuance of common stock under equity compensation plans Repurchases of common stock
2017-12-31
2017-11-02 3399.69 未披露 定期报告 2017-10-27
2017-11-02 3398.40 未披露 定期报告 2017-09-30
2017-07-27 3344.04 未披露 定期报告 2017-07-21
2017-07-27 3341.30 未披露 定期报告 2017-06-30
2017-04-27 3320.58 未披露 定期报告 2017-04-21
2017-04-27 3318.80 未披露 定期报告 2017-03-31
2017-04-13 3314.17 未披露 定期报告 2017-03-22
2017-02-16 3295.06 未披露 定期报告 2017-02-10
2017-02-16 3289.70 未披露
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from December 31, 2015 to December 31, 2016 Issuance of common stock under equity compensation plans Repurchases of common stock
2016-12-31
2016-10-28 3264.36 未披露 定期报告 2016-10-21
2016-10-28 3264.40 未披露 定期报告 2016-09-30
2016-07-28 3239.23 未披露 定期报告 2016-07-25
2016-07-28 3238.80 未披露 定期报告 2016-06-30
2016-04-29 3233.28 未披露 定期报告 2016-04-22
2016-04-29 3232.30 未披露 定期报告 2016-03-31
2016-04-14 3231.96 未披露 定期报告 2016-03-23
2016-02-23 3227.14 未披露 定期报告 2016-02-15
2016-02-23 3332.30 未披露
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from December 31, 2014 to December 31, 2015 Issuance of common stock under equity compensation plans Repurchases of common stock
2015-12-31
2015-10-29 3325.48 未披露 定期报告 2015-10-28
2015-10-29 3341.90 未披露 定期报告 2015-09-30
2015-07-23 3352.66 未披露 定期报告 2015-07-20
2015-07-23 3389.10 未披露 定期报告 2015-06-30
2015-04-24 3449.32 未披露 定期报告 2015-04-20
2015-04-24 3448.90 未披露 定期报告 2015-03-31
2015-04-02 3448.91 未披露 定期报告 2015-03-11
2015-02-24 3446.21 未披露 定期报告 2015-02-19
2015-02-24 3443.30 未披露
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From December 31, 2013 to December 31, 2014 Issuance of common stock under equity compensation plans Repurchases of common stock
2014-12-31
2014-12-01 3443.23 未披露 定期报告 2014-11-24
2014-10-24 3441.08 未披露 定期报告 2014-10-14
2014-10-24 3440.40 未披露 定期报告 2014-09-30
2014-07-24 3430.91 未披露 定期报告 2014-07-15
2014-07-24 3427.40 未披露 定期报告 2014-06-30
2014-04-25 3421.99 未披露 定期报告 2014-04-15
2014-04-25 3421.80 未披露 定期报告 2014-03-31
2014-04-01 3421.55 未披露 定期报告 2014-03-12
2014-02-27 3408.85 未披露 定期报告 2014-02-20
2014-02-27 3407.30 未披露
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From December 31,2012 to December 31,2013 Issuance of common stock under equity compensation plans Repurchases of common stock
2013-12-31
2013-10-25 3395.02 未披露 定期报告 2013-10-21
2013-10-25 3395.00 未披露 定期报告 2013-09-30
2013-07-31 3390.49 未披露 定期报告 2013-07-25
2013-07-31 3386.80 未披露 定期报告 2013-06-30
2013-04-24 3373.11 未披露 定期报告 2013-04-24
2013-04-24 3374.00 未披露 定期报告 2013-03-31
2013-04-05 3390.10 未披露 定期报告 2013-03-20
2013-02-22 3348.96 未披露 定期报告 2013-02-14
2013-02-22 3345.20 未披露
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from December 31, 2011 to December 31, 2012 Issuance of common stock under equity compensation plans Cancellation of common stock under equity compensation plans Repurchase of common stock
2012-12-31
2012-10-29 3335.03 未披露 定期报告 2012-10-24
2012-10-29 3329.70 未披露 定期报告 2012-09-30
2012-07-27 3312.26 未披露 定期报告 2012-07-25
2012-07-27 3310.80 未披露 定期报告 2012-06-30
2012-04-30 3308.65 未披露 定期报告 2012-04-25
2012-04-30 3308.60 未披露 定期报告 2012-03-31
2012-03-05 3306.78 未披露 定期报告 2012-03-01
2012-03-05 3327.60 未披露
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from December 31, 2010 to December 31, 2011 Issuance of common stock under equity compensation plans Issuance of common stock through public offering, net of issuance costs of $662 Cancellation of common stock under equity compensation plans Purchase of common stock
2011-12-31
2011-10-27 3324.93 未披露 定期报告 2011-10-24
2011-10-27 3321.30 未披露 定期报告 2011-09-30
2011-08-03 3317.32 未披露 定期报告 2011-07-29
2011-08-03 3317.50 未披露 定期报告 2011-06-30
2011-04-29 3316.56 未披露 定期报告 2011-04-27
2011-04-29 3316.60 未披露 定期报告 2011-03-31
2011-02-25 3313.83 未披露 定期报告 2011-02-22
2011-02-25 2851.40 未披露
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from December 31, 2009 to December 31, 2010 Issuance of common stock under equity compensation plans Cancellation of common stock under equity compensation plans Purchase of common stock
2010-12-31
2010-10-29 2850.63 未披露 定期报告 2010-10-27
2010-10-29 2850.80 未披露 定期报告 2010-09-30
2010-07-30 2849.40 未披露 定期报告 2010-07-27
2010-07-30 2849.40 未披露 定期报告 2010-06-30
2010-02-26 2890.66 未披露 定期报告 2010-02-22
2010-02-26 2902.60 未披露
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from December 31, 2008 to December 31, 2009 Issuance of common stock under equity compensation plans Cancellation of common stock under equity compensation plans Purchase of common stock
2009-12-31
2009-02-27 3169.21 未披露 定期报告 2009-02-25
2009-02-27 3189.40 未披露
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from December 31, 2007 to December 31, 2008 Issuance of common stock under equity compensation plans Cancellation of common stock under equity compensation plans Purchase of common stock
2008-12-31
2008-03-04 3272.72 未披露 定期报告 2008-02-20
2008-03-04 3270.60 未披露
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from December 31, 2006 to December 31, 2007 Issuance of common stock under equity compensation plans Cancellation of common stock under equity compensation plans Purchase of common stock
2007-12-31
2007-03-14 3305.23 未披露 定期报告 2007-03-07
2007-03-14 3353.00 未披露
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from December 31, 2005 to December 31, 2006 Issuance of common stock under equity compensation plans Cancellation of common stock under equity compensation plans Purchase of common stock
2006-12-31
2006-03-09 3390.29 未披露 定期报告 2006-03-01
2006-03-09 3377.80 未披露
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from December 31, 2004 to December 31, 2005 Issuance of common stock for cash under stock options and stock purchase plans Deferred stock compensation relating to restricted stock Cancellation of restricted stock compensation Common stock repurchased
2005-12-31
2005-03-16 3194.76 未披露 定期报告 2005-03-04
2005-03-16 3184.80 未披露
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from December 31, 2003 to December 31, 2004 Issuance of common stock for cash under stock option and stock purchase plans
2004-12-31
2004-03-15 3137.39 未披露 定期报告 2004-03-04
2004-03-15 3040.60 未披露
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from December 31, 2002 to December 31, 2003 Issuance of common stock for cash under stock option, stock warrant and stock purchase plans
2003-12-31
2003-03-31 2891.18 未披露 定期报告 2003-03-24
2003-03-31 2888.90 未披露
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from December 31, 2001 to December 31, 2002 Issuance of common stock for cash under stock option, stock warrant and stock purchase plans
2002-12-31
2002-03-29 2875.71 未披露 定期报告 2002-03-22
2002-03-29 2868.20 未披露
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from December 31, 2000 to December 31, 2001 Issuance of common stock for cash under stock option, stock warrant and stock purchase plans
2001-12-31
2001-04-02 2806.85 未披露 定期报告 2001-03-12
2001-04-02 2806.90 未披露
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from December 31, 1999 to December 31, 2000 Issuance of common stock for cash under stock option, stock warrant and stock purchase plans, net of registration costs Common stock issued for acquisition Stock-based compensation related to stock options
2000-12-31
2000-03-24 2456.63 未披露 定期报告 2000-03-17
2000-03-24 2402.90 未披露
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from March 31, 1999 to December 31, 1999 Issuance of common stock for cash under stock option,stock warrant and stock purchase plans
1999-12-31
1999-06-29 2382.25 未披露 定期报告 1999-06-18
1999-06-29 2382.20 未披露
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from March 31, 1998 to March 31, 1999 Issuance of common stock for cash under stock options and stock purchase plans
1999-03-31
1998-06-29 2376.76 未披露 定期报告 1998-06-10
1998-06-29 2374.90 未披露
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from March 31, 1997 to March 31, 1998 Issuance of common stock for cash under stock options and stock purchase plans
1998-03-31
1997-06-27 2355.43 未披露 定期报告 1997-06-06
1997-06-27 2354.60 未披露
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from March 31, 1996 to March 31, 1997 Issuance of common stock for cash under stock options and stock purchase plans Issuance of common stock upon exercise of warrants
1997-03-31
1996-06-27 2157.93 未披露 定期报告 1996-06-07
1996-06-27 2155.00 未披露
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from March 31, 1995 to March 31, 1996 Issuance of common stock for cash under stock options and stock purchase plans
1996-03-31
1996-06-27 2098.30 未披露
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from March 31, 1994 to March 31, 1995 Issuance of common stock for cash under stock options and stock purchase plans Issuance of common stock upon exercise of warrants Issuance of common stock in purchase of majority interest in Inmuno Analitica Issuance of Series B Preferred Stock on January 5, 1995 which was converted to common stock on January 31,1995 net of issuance costs of $385,000
1995-03-31
From March 29, 2026 to June 28, 2026 Issuance of common stock under equity compensation plans
From December 28, 2025 to March 29, 2026 Issuance of common stock under equity compensation plans
From December 29, 2024 to December 28, 2025 Issuance of common stock under equity compensation plans Tax withholdings related to vesting of stock-based awards
From June 29, 2025 to September 28, 2025 Issuance of common stock under equity compensation plans
From March 30, 2025 to June 29, 2025 Issuance of common stock under equity compensation plans Tax withholdings related to vesting of stock-based awards
From December 29, 2024 to March 30, 2025 Issuance of common stock under equity compensation plans
From December 31, 2023 to December 29, 2024 Issuance of common stock under equity compensation plans Tax withholdings related to vesting of stock-based awards
From June 30, 2024 to September 29, 2024 Issuance of common stock under equity compensation plans
From March 31, 2024 to June 30, 2024 Issuance of common stock under equity compensation plans Tax withholdings related to vesting of stock-based awards
From December 31, 2023 to March 31, 2024 Issuance of common stock under equity compensation plans Tax withholdings related to vesting of stock-based awards
From January 1, 2023 to December 31,2023 Issuance of common stock under equity compensation plans Tax withholdings related to vesting of stock-based awards Repurchases of common stock
From April 2, 2023 to July 2, 2023 Issuance of common stock under equity compensation plans
From January 1, 2023 to April 2, 2023 Issuance of common stock under equity compensation plans Tax withholdings related to vesting of stock-based awards
From January 2, 2022 to January 1, 2023 Issuance of shares in connection with the Combinations Issuance of common stock under equity compensation plans Tax withholdings related to vesting of stock-based awards Repurchases of common stock
From July 3, 2022 to October 2, 2022 Repurchases of common stock
From April 3, 2022 to July 3, 2022 Issuance of common stock under equity compensation plans Issuance of shares in connection with the Combinations
From December 31, 2021 to March 31, 2022 Issuance of common stock under equity compensation plans Tax withholdings related to vesting of stock-based awards
From December 31, 2020 to December 31, 2021 Issuance of common stock under equity compensation plans Tax withholdings related to vesting of stock-based awards Repurchases of common stock
From June 30, 2021 to September 30, 2021 Issuance of common stock under equity compensation and benefit plans Tax withholdings related to vesting of stock-based awards
From March 31, 2021 to June 30, 2021 Issuance of common stock under equity compensation plans Tax withholdings related to vesting of stock-based awards Repurchases of common stock
From December 31, 2020 to March 31, 2021 Issuance of common stock under equity compensation plans Tax withholdings related to vesting of stock-based awards
from December 31, 2019 to December 31, 2020 Issuance of common stock under equity compensation plans Issuance of shares in exchange for Convertible Senior Notes Repurchases of common stock
From June 30, 2020 to September 30, 2020 Issuance of common stock under equity compensation and benefit plans Issuance of shares in exchange for Convertible Senior Notes Repurchases of common stock
From March 31, 2020 to June 30, 2020 Issuance of common stock under equity compensation plans Issuance of shares in exchange for Convertible Senior Notes Repurchases of common stock
from December 31, 2019 to March 31, 2020 Issuance of common stock under equity compensation plans Repurchases of common stock
from December 31, 2018 to December 31, 2019 Issuance of common stock under equity compensation plans Issuance of shares in exchange for Convertible Senior Notes Repurchases of common stock
from June 30, 2019 to September 30, 2019 Issuance of common stock under equity compensation and benefit plans Repurchases of common stock
From March 31, 2019 to June 30, 2019 Issuance of common stock under equity compensation and benefit plans Issuance of shares in exchange for Convertible Senior Notes Repurchases of common stock
from December 31, 2018 to March 31, 2019 Issuance of common stock under equity compensation plans Repurchases of common stock
from December 31, 2017 to December 31, 2018 Issuance of common stock under equity compensation plans Issuance of shares in exchange for Convertible Senior Notes Repurchases of common stock
from December 31, 2016 to December 31, 2017 Issuance of common stock under equity compensation plans Repurchases of common stock
from December 31, 2015 to December 31, 2016 Issuance of common stock under equity compensation plans Repurchases of common stock
from December 31, 2014 to December 31, 2015 Issuance of common stock under equity compensation plans Repurchases of common stock
From December 31, 2013 to December 31, 2014 Issuance of common stock under equity compensation plans Repurchases of common stock
From December 31,2012 to December 31,2013 Issuance of common stock under equity compensation plans Repurchases of common stock
from December 31, 2011 to December 31, 2012 Issuance of common stock under equity compensation plans Cancellation of common stock under equity compensation plans Repurchase of common stock
from December 31, 2010 to December 31, 2011 Issuance of common stock under equity compensation plans Issuance of common stock through public offering, net of issuance costs of $662 Cancellation of common stock under equity compensation plans Purchase of common stock
from December 31, 2009 to December 31, 2010 Issuance of common stock under equity compensation plans Cancellation of common stock under equity compensation plans Purchase of common stock
from December 31, 2008 to December 31, 2009 Issuance of common stock under equity compensation plans Cancellation of common stock under equity compensation plans Purchase of common stock
from December 31, 2007 to December 31, 2008 Issuance of common stock under equity compensation plans Cancellation of common stock under equity compensation plans Purchase of common stock
from December 31, 2006 to December 31, 2007 Issuance of common stock under equity compensation plans Cancellation of common stock under equity compensation plans Purchase of common stock
from December 31, 2005 to December 31, 2006 Issuance of common stock under equity compensation plans Cancellation of common stock under equity compensation plans Purchase of common stock
from December 31, 2004 to December 31, 2005 Issuance of common stock for cash under stock options and stock purchase plans Deferred stock compensation relating to restricted stock Cancellation of restricted stock compensation Common stock repurchased
from December 31, 2003 to December 31, 2004 Issuance of common stock for cash under stock option and stock purchase plans
from December 31, 2002 to December 31, 2003 Issuance of common stock for cash under stock option, stock warrant and stock purchase plans
from December 31, 2001 to December 31, 2002 Issuance of common stock for cash under stock option, stock warrant and stock purchase plans
from December 31, 2000 to December 31, 2001 Issuance of common stock for cash under stock option, stock warrant and stock purchase plans
from December 31, 1999 to December 31, 2000 Issuance of common stock for cash under stock option, stock warrant and stock purchase plans, net of registration costs Common stock issued for acquisition Stock-based compensation related to stock options
from March 31, 1999 to December 31, 1999 Issuance of common stock for cash under stock option,stock warrant and stock purchase plans
from March 31, 1998 to March 31, 1999 Issuance of common stock for cash under stock options and stock purchase plans
from March 31, 1997 to March 31, 1998 Issuance of common stock for cash under stock options and stock purchase plans
from March 31, 1996 to March 31, 1997 Issuance of common stock for cash under stock options and stock purchase plans Issuance of common stock upon exercise of warrants
from March 31, 1995 to March 31, 1996 Issuance of common stock for cash under stock options and stock purchase plans
from March 31, 1994 to March 31, 1995 Issuance of common stock for cash under stock options and stock purchase plans Issuance of common stock upon exercise of warrants Issuance of common stock in purchase of majority interest in Inmuno Analitica Issuance of Series B Preferred Stock on January 5, 1995 which was converted to common stock on January 31,1995 net of issuance costs of $385,000