股本结构
单位：万股
| 公告日期 | 2025-11-06 | 2025-11-06 | 2025-08-07 | 2025-08-07 | 2025-05-07 | 2025-05-07 |
|---|---|---|---|---|---|---|
| 证券总股本 | 1957.33 | 1957.35 | 1950.48 | 1952.54 | 1959.95 | 1973.32 |
| 普通股本 | 1957.33 | 1957.35 | 1950.48 | 1952.54 | 1959.95 | 1973.32 |
| 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 | 2025-11-03 | 2025-09-30 | 2025-08-04 | 2025-06-30 | 2025-05-05 | 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 |
|---|---|---|---|---|
| 2025-11-06 | 1957.33 | 未披露 | 定期报告 | 2025-11-03 |
| 2025-11-06 | 1957.35 | 未披露 |
更多>>
From June 30, 2025 to September 30, 2025
Issuance of common stock under employee stock purchase plan
Acquisition of treasury stock
|
2025-09-30 |
| 2025-08-07 | 1950.48 | 未披露 | 定期报告 | 2025-08-04 |
| 2025-08-07 | 1952.54 | 未披露 |
更多>>
From March 31, 2025 to June 30, 2025
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
|
2025-06-30 |
| 2025-05-07 | 1959.95 | 未披露 | 定期报告 | 2025-05-05 |
| 2025-04-28 | 1968.46 | 未披露 | 定期报告 | 2025-04-14 |
| 2025-05-07 | 1973.32 | 未披露 |
更多>>
From December 31, 2024 to March 31, 2025
Acquisition of treasury stock
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
|
2025-03-31 |
| 2025-03-10 | 1976.40 | 未披露 | 定期报告 | 2025-03-03 |
| 2025-03-10 | 1978.44 | 未披露 |
更多>>
From December 31,2023 to December 31,2024
Issuance of common stock under employee stock purchase plan
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
|
2024-12-31 |
| 2024-11-07 | 1979.91 | 未披露 |
更多>>
From June 30, 2024 to September 30, 2024
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
|
2024-09-30 |
| 2024-08-01 | 1971.41 | 未披露 |
更多>>
From March 31, 2024 to June 30, 2024
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
|
2024-06-30 |
| 2024-05-06 | 1971.62 | 未披露 | 定期报告 | 2024-05-01 |
| 2024-04-29 | 1974.40 | 未披露 | 定期报告 | 2024-04-18 |
| 2024-05-06 | 1974.93 | 未披露 |
更多>>
From December 31, 2023 to March 31, 2024
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
Issuance of common stock under employee stock purchase plan
|
2024-03-31 |
| 2024-03-15 | 1964.59 | 未披露 | 定期报告 | 2024-03-01 |
| 2023-11-09 | 1961.08 | 未披露 |
更多>>
From June 30, 2023 to September 30, 2023
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
Issuance of common stock under employee stock purchase plan
|
2023-09-30 |
| 2023-08-09 | 1953.55 | 未披露 | 定期报告 | 2023-08-01 |
| 2023-08-09 | 1951.33 | 未披露 |
更多>>
From March 31, 2023 to June 30, 2023
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
|
2023-06-30 |
| 2023-05-05 | 1950.42 | 未披露 | 定期报告 | 2023-05-01 |
| 2023-04-28 | 1948.47 | 未披露 | 定期报告 | 2023-04-18 |
| 2023-05-05 | 1936.97 | 未披露 |
更多>>
From December 31, 2022 to March 31, 2023
Acquisition of treasury stock
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
|
2023-03-31 |
| 2023-03-16 | 1915.31 | 未披露 | 定期报告 | 2023-03-01 |
| 2023-03-16 | 1919.85 | 未披露 |
更多>>
From December 31, 2021 to December 31, 2022
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
Issuance of common stock under employee stock purchase plan
|
2022-12-31 |
| 2022-12-06 | 1918.20 | 未披露 | 定期报告 | 2022-12-01 |
| 2022-12-06 | 1917.35 | 未披露 |
更多>>
From June 30, 2022 to September 30, 2022
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
|
2022-09-30 |
| 2022-08-09 | 1907.51 | 未披露 | 定期报告 | 2022-08-05 |
| 2022-08-09 | 1907.07 | 未披露 |
更多>>
From March 31, 2022 to June 30, 2022
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
|
2022-06-30 |
| 2022-05-02 | 1889.42 | 未披露 | 定期报告 | 2022-04-18 |
| 2022-05-10 | 1889.53 | 未披露 |
更多>>
From December 31, 2021 to March 31, 2022
Issuance of common stock under employee stock purchase plan
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
|
2022-03-31 |
| 2022-03-11 | 1887.67 | 未披露 | 定期报告 | 2022-03-01 |
| 2022-03-11 | 1891.00 | 未披露 |
更多>>
From December 31, 2020 to December 31, 2021
Issuance of common stock under employee stock purchase plan
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
|
2021-12-31 |
| 2021-11-04 | 1889.91 | 未披露 |
更多>>
From June 30, 2021 to September 30, 2021
Issuance of common stock under employee stock purchase plan
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
|
2021-09-30 |
| 2021-07-30 | 1881.00 | 未披露 | 定期报告 | 2021-07-26 |
| 2021-07-30 | 1881.19 | 未披露 |
更多>>
From March 31, 2021 to June 30, 2021
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
|
2021-06-30 |
| 2021-05-05 | 1876.07 | 未披露 | 定期报告 | 2021-04-26 |
| 2021-05-17 | 1875.43 | 未披露 | 定期报告 | 2021-04-21 |
| 2021-05-05 | 1873.20 | 未披露 |
更多>>
from December 31, 2020 to March 31, 2021
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
|
2021-03-31 |
| 2021-03-03 | 1842.98 | 未披露 |
更多>>
From December 31,2019 to December 31,2020
Issuance of common stock under employee stock purchase plan
Acquisition of treasury stock
|
2020-12-31 |
| 2020-10-29 | 1830.27 | 未披露 |
更多>>
From June 30, 2020 to September 30, 2020
Exercise of stock options and issuance of restricted stock awards,net of forfeitures
|
2020-09-30 |
| 2020-08-04 | 1859.50 | 未披露 | 定期报告 | 2020-08-03 |
| 2020-07-31 | 1801.08 | 未披露 | 定期报告 | 2020-07-27 |
| 2020-07-31 | 1801.25 | 未披露 |
更多>>
From March 31, 2020 to June 30, 2020
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
|
2020-06-30 |
| 2020-04-29 | 1799.32 | 未披露 | 定期报告 | 2020-04-20 |
| 2020-05-01 | 1798.64 | 未披露 |
更多>>
From December 31, 2019 to March 31, 2020
Issuance of common stock under employee stock purchase plan
Acquisition of treasury stock
|
2020-03-31 |
| 2020-02-28 | 1796.60 | 未披露 | 定期报告 | 2020-02-24 |
| 2020-02-28 | 1800.13 | 未披露 |
更多>>
From December 31,2018 to December 31,2019
Issuance of common stock under employee stock purchase plan
Acquisition of treasury stock
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
|
2019-12-31 |
| 2019-10-31 | 1809.66 | 未披露 | 定期报告 | 2019-10-28 |
| 2019-10-31 | 1809.86 | 未披露 |
更多>>
from June 30, 2019 to September 30, 2019
Issuance of common stock under employee stock purchase plan
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
|
2019-09-30 |
| 2019-08-02 | 1802.77 | 未披露 | 定期报告 | 2019-07-29 |
| 2019-08-02 | 1803.75 | 未披露 |
更多>>
from March 31, 2019 to June 30, 2019
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
|
2019-06-30 |
| 2019-05-02 | 1787.98 | 未披露 | 定期报告 | 2019-04-30 |
| 2019-04-25 | 1785.17 | 未披露 | 定期报告 | 2019-04-05 |
| 2019-05-02 | 1785.20 | 未披露 |
更多>>
from December 31, 2018 to March 31, 2019
Issuance of common stock under employee stock purchase plan
Sale of treasury stock
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
|
2019-03-31 |
| 2019-03-01 | 1774.40 | 未披露 |
更多>>
from December 31, 2017 to December 31, 2018
Issuance of common stock under employee stock purchase plan
Sale of treasury stock
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
|
2018-12-31 |
| 2018-10-31 | 1773.74 | 未披露 | 定期报告 | 2018-10-29 |
| 2018-10-31 | 1773.94 | 未披露 | 定期报告 | 2018-09-30 |
| 2018-08-02 | 1766.43 | 未披露 | 定期报告 | 2018-07-31 |
| 2018-08-02 | 1765.42 | 未披露 | 定期报告 | 2018-06-30 |
| 2018-04-25 | 1750.67 | 未披露 | 定期报告 | 2018-04-13 |
| 2018-05-04 | 1752.16 | 未披露 | 定期报告 | 2018-03-31 |
| 2018-03-02 | 1752.54 | 未披露 | 定期报告 | 2018-02-28 |
| 2018-03-02 | 1712.88 | 未披露 |
更多>>
from December 31, 2016 to December 31, 2017
Issuance of common stock under employee stock purchase plan
Shares withheld, repurchased and retired related to minimum statutory tax withholding requirements
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
|
2017-12-31 |
| 2017-11-02 | 1711.00 | 未披露 | 定期报告 | 2017-10-31 |
| 2017-11-02 | 1709.57 | 未披露 | 定期报告 | 2017-09-30 |
| 2017-08-04 | 1708.82 | 未披露 | 定期报告 | 2017-08-02 |
| 2017-08-04 | 1706.40 | 未披露 | 定期报告 | 2017-06-30 |
| 2017-06-21 | 1706.40 | 未披露 | 定期报告 | 2017-06-15 |
| 2017-04-25 | 1702.42 | 未披露 | 定期报告 | 2017-04-17 |
| 2017-05-09 | 1704.16 | 未披露 | 定期报告 | 2017-03-31 |
| 2017-03-09 | 1690.25 | 未披露 | 定期报告 | 2017-03-08 |
| 2017-03-09 | 1676.19 | 未披露 |
更多>>
from December 31, 2015 to December 31, 2016
Issuance of common stock under employee stock purchase plan
Shares withheld, repurchased and retired related to minimum statutory tax withholding requirements
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
|
2016-12-31 |
| 2016-11-03 | 1655.61 | 未披露 | 定期报告 | 2016-11-02 |
| 2016-11-03 | 1653.46 | 未披露 | 定期报告 | 2016-09-30 |
| 2016-08-05 | 1650.93 | 未披露 | 定期报告 | 2016-08-03 |
| 2016-08-05 | 1582.87 | 未披露 | 定期报告 | 2016-06-30 |
| 2016-04-25 | 1649.93 | 未披露 | 定期报告 | 2016-04-18 |
| 2016-05-10 | 1581.87 | 未披露 | 定期报告 | 2016-03-31 |
| 2016-03-14 | 1616.84 | 未披露 | 定期报告 | 2016-03-11 |
| 2016-03-14 | 1567.73 | 未披露 |
更多>>
from December 31, 2014 to December 31, 2015
Common stock issued under benefit plan
Payment of restricted stock tax withholdings
Exercise of stock options, vesting of restricted stock awards
|
2015-12-31 |
| 2015-11-09 | 1611.54 | 未披露 | 定期报告 | 2015-11-06 |
| 2015-11-09 | 1566.73 | 未披露 | 定期报告 | 2015-09-30 |
| 2015-08-10 | 1609.09 | 未披露 | 定期报告 | 2015-08-05 |
| 2015-08-10 | 1564.29 | 未披露 | 定期报告 | 2015-06-30 |
| 2015-05-11 | 1607.12 | 未披露 | 定期报告 | 2015-05-06 |
| 2015-04-09 | 1607.10 | 未披露 | 定期报告 | 2015-04-01 |
| 2015-05-11 | 1562.29 | 未披露 | 定期报告 | 2015-03-31 |
| 2015-03-17 | 1599.00 | 未披露 | 定期报告 | 2015-03-13 |
| 2015-03-17 | 1549.38 | 未披露 |
更多>>
from December 31, 2013 to December 31, 2014
Common stock issued under benefit plan
Payment of restricted stock tax withholdings
Exercise of stock options, vesting of restricted stock awards
|
2014-12-31 |
| 2014-11-10 | 1591.10 | 未披露 | 定期报告 | 2014-11-06 |
| 2014-11-10 | 1546.38 | 未披露 | 定期报告 | 2014-09-30 |
| 2014-08-07 | 1590.32 | 未披露 | 定期报告 | 2014-08-05 |
| 2014-08-07 | 1544.02 | 未披露 | 定期报告 | 2014-06-30 |
| 2014-04-30 | 1585.94 | 未披露 | 定期报告 | 2014-04-22 |
| 2014-05-09 | 1540.33 | 未披露 | 定期报告 | 2014-03-31 |
| 2014-03-17 | 1592.72 | 未披露 | 定期报告 | 2014-03-13 |
| 2014-03-17 | 1527.71 | 未披露 |
更多>>
from December 31, 2012 to December 31, 2013
Common stock issued under benefit plan
Payment of restricted stock tax withholdings
Exercise of stock options, vesting of restricted stock awards
|
2013-12-31 |
| 2013-11-08 | 1561.20 | 未披露 | 定期报告 | 2013-11-05 |
| 2013-11-08 | 1522.71 | 未披露 | 定期报告 | 2013-09-30 |
| 2013-08-09 | 1557.15 | 未披露 | 定期报告 | 2013-08-07 |
| 2013-08-09 | 1516.36 | 未披露 | 定期报告 | 2013-06-30 |
| 2013-05-09 | 1551.09 | 未披露 | 定期报告 | 2013-05-03 |
| 2013-04-25 | 1549.65 | 未披露 | 定期报告 | 2013-04-01 |
| 2013-05-09 | 1512.69 | 未披露 | 定期报告 | 2013-03-31 |
| 2013-04-02 | 1511.14 | 未披露 | 定期报告 | 2013-03-28 |
| 2013-04-02 | 1490.48 | 未披露 |
更多>>
from December 31, 2011 to December 31, 2012
Common stock issued under benefit plan
Payment of restricted stock withholdings
Exercise of stock options, vesting of restricted stock awards
|
2012-12-31 |
| 2012-11-08 | 1486.55 | 未披露 | 定期报告 | 2012-09-30 |
| 2012-08-08 | 1482.19 | 未披露 | 定期报告 | 2012-08-06 |
| 2012-08-08 | 1482.23 | 未披露 | 定期报告 | 2012-06-30 |
| 2012-05-09 | 1476.34 | 未披露 | 定期报告 | 2012-05-07 |
| 2012-05-09 | 1475.63 | 未披露 | 定期报告 | 2012-03-31 |
| 2012-03-08 | 1459.94 | 未披露 | 定期报告 | 2012-03-05 |
| 2012-03-08 | 1454.83 | 未披露 |
更多>>
from December 31, 2010 to December 31, 2011
Common stock issued under benefit plan
Acquisition of treasury stock
Payment of restricted stock withholdings
Exercise of stock options, vesting of restricted stock awards
|
2011-12-31 |
| 2011-11-04 | 1449.97 | 未披露 | 定期报告 | 2011-11-02 |
| 2011-11-04 | 1467.53 | 未披露 | 定期报告 | 2011-09-30 |
| 2011-08-04 | 1489.93 | 未披露 | 定期报告 | 2011-08-03 |
| 2011-08-04 | 1491.30 | 未披露 | 定期报告 | 2011-06-30 |
| 2011-05-05 | 1487.55 | 未披露 | 定期报告 | 2011-05-03 |
| 2011-05-05 | 1488.71 | 未披露 | 定期报告 | 2011-03-31 |
| 2011-03-14 | 1475.71 | 未披露 | 定期报告 | 2011-03-04 |
| 2011-03-14 | 1468.88 | 未披露 |
更多>>
Common stock issued under benefit plan
Payment of restricted stock withholdings
Exercise of stock options, vesting of restricted stock awards
|
2010-12-31 |
| 2010-11-05 | 1519.21 | 未披露 | 定期报告 | 2010-11-03 |
| 2010-11-05 | 1453.96 | 未披露 | 定期报告 | 2010-09-30 |
| 2010-08-06 | 1445.09 | 未披露 | 定期报告 | 2010-08-03 |
| 2010-08-06 | 1441.25 | 未披露 | 定期报告 | 2010-06-30 |
| 2010-05-04 | 1436.43 | 未披露 | 定期报告 | 2010-05-03 |
| 2010-05-04 | 1432.74 | 未披露 | 定期报告 | 2010-03-31 |
| 2010-03-09 | 1426.05 | 未披露 | 定期报告 | 2010-03-05 |
| 2010-03-09 | 1415.43 | 未披露 |
更多>>
from December 31, 2008 to December 31, 2009
Common stock issued under benefit plan
Acquisition of treasury stock
Payment of restricted stock withholdings
Exercise of stock options, vesting of restricted stock awards
|
2009-12-31 |
| 2009-03-13 | 1398.14 | 未披露 | 定期报告 | 2009-03-11 |
| 2009-03-13 | 1404.90 | 未披露 |
更多>>
from December 31,2007 to December 31,2008
Common stock issued under benefit plan
Acquisition of treasury stock
Exercise of stock options, vesting of restricted stock awards
|
2008-12-31 |
| 2008-03-13 | 1459.01 | 未披露 | 定期报告 | 2008-03-10 |
| 2008-03-13 | 1482.95 | 未披露 |
更多>>
from December 31, 2006 to December 31, 2007
Acquisition of treasury stock
Common stock issued under benefit plan
Exercise of stock options
Retirement of treasury stock
|
2007-12-31 |
| 2007-03-16 | 1495.19 | 未披露 | 定期报告 | 2007-03-14 |
| 2007-03-16 | 1486.62 | 未披露 |
更多>>
from December 31, 2005 to December 31, 2006
Retirement of treasury stock
Common stock issued under benefit plan
Exercise of stock options
Acquisition of treasury stock
|
2006-12-31 |
| 2006-03-16 | 1474.69 | 未披露 | 定期报告 | 2006-03-13 |
| 2006-03-16 | 1463.81 | 未披露 |
更多>>
from December 31, 2004 to December 31, 2005
Common stock issued under benefit plan
Exercise of stock options
|
2005-12-31 |
| 2005-03-16 | 1451.30 | 未披露 | 定期报告 | 2005-03-08 |
| 2005-03-16 | 1448.78 | 未披露 |
更多>>
from December 31, 2003 to December 31, 2004
Issuance of common stock
Common stock issued under benefit plan
|
2004-12-31 |
| 2004-03-15 | 1439.68 | 未披露 | 定期报告 | 2004-03-01 |
| 2004-03-15 | 1159.01 | 未披露 |
更多>>
from December 31, 2002 to December 31, 2003
Common stock issued under benefit plan
Exercise of warrants
Exercise of stock options
|
2003-12-31 |
| 2003-03-26 | 1128.09 | 未披露 | 定期报告 | 2003-03-17 |
| 2003-03-26 | 1114.98 | 未披露 |
更多>>
from December 31, 2001 to December 31, 2002
Common stock issued under benefit plan
Exercise of stock options
|
2002-12-31 |
| 2002-03-20 | 1096.12 | 未披露 |
更多>>
from December 31, 2000 to December 31, 2001
Sale of common stock
Common stock issued under benefit plan
Exercise of stock options
|
2001-12-31 |
| 2001-02-08 | 861.91 | 未披露 |
更多>>
from December 31, 1999 to December 31, 2000
Sale of common stock
Common stock issued under benefit plan
Exercise of stock options
|
2000-12-31 |
| 2000-03-30 | 759.73 | 未披露 | 定期报告 | 2000-03-22 |
| 2000-03-30 | 729.69 | 未披露 |
更多>>
from December 31, 1998 to December 31, 1999
Common stock issued under benefit plan
Exercise of stock options
|
1999-12-31 |
| 1999-03-24 | 720.59 | 未披露 |
更多>>
from December 31, 1997 to December 31, 1998
Issuance of common stock under benefit plan
Exercise of stock options
|
1998-12-31 |
| 1998-03-25 | 708.66 | 未披露 | 定期报告 | 1998-03-13 |
| 1998-03-25 | 708.60 | 未披露 |
更多>>
from December 31, 1996 to December 31, 1997
Issuance of common stock under benefit plan
Exercise of stock options
|
1997-12-31 |
| 1997-03-24 | 704.09 | 未披露 | 定期报告 | 1997-03-14 |
| 1997-03-24 | 699.32 | 未披露 |
更多>>
from December 31, 1995 to December 31, 1996
Conversion of 1,298,182 sharesof preferred stock to 3,245,500 shares of common stock
Exercise of stock options and warrants
Initial public offering of commonstock, net of issuance costs of $1,736,555
Issuance of common stock under benefit plans
|
1996-12-31 |
From June 30, 2025 to September 30, 2025
Issuance of common stock under employee stock purchase plan
Acquisition of treasury stock
From March 31, 2025 to June 30, 2025
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
From December 31, 2024 to March 31, 2025
Acquisition of treasury stock
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
From December 31,2023 to December 31,2024
Issuance of common stock under employee stock purchase plan
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
From June 30, 2024 to September 30, 2024
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
From March 31, 2024 to June 30, 2024
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
From December 31, 2023 to March 31, 2024
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
Issuance of common stock under employee stock purchase plan
From June 30, 2023 to September 30, 2023
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
Issuance of common stock under employee stock purchase plan
From March 31, 2023 to June 30, 2023
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
From December 31, 2022 to March 31, 2023
Acquisition of treasury stock
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
From December 31, 2021 to December 31, 2022
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
Issuance of common stock under employee stock purchase plan
From June 30, 2022 to September 30, 2022
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
From March 31, 2022 to June 30, 2022
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
From December 31, 2021 to March 31, 2022
Issuance of common stock under employee stock purchase plan
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
From December 31, 2020 to December 31, 2021
Issuance of common stock under employee stock purchase plan
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
From June 30, 2021 to September 30, 2021
Issuance of common stock under employee stock purchase plan
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
From March 31, 2021 to June 30, 2021
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
from December 31, 2020 to March 31, 2021
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
From December 31,2019 to December 31,2020
Issuance of common stock under employee stock purchase plan
Acquisition of treasury stock
From June 30, 2020 to September 30, 2020
Exercise of stock options and issuance of restricted stock awards,net of forfeitures
From March 31, 2020 to June 30, 2020
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
From December 31, 2019 to March 31, 2020
Issuance of common stock under employee stock purchase plan
Acquisition of treasury stock
From December 31,2018 to December 31,2019
Issuance of common stock under employee stock purchase plan
Acquisition of treasury stock
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
from June 30, 2019 to September 30, 2019
Issuance of common stock under employee stock purchase plan
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
from March 31, 2019 to June 30, 2019
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
from December 31, 2018 to March 31, 2019
Issuance of common stock under employee stock purchase plan
Sale of treasury stock
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
from December 31, 2017 to December 31, 2018
Issuance of common stock under employee stock purchase plan
Sale of treasury stock
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
from December 31, 2016 to December 31, 2017
Issuance of common stock under employee stock purchase plan
Shares withheld, repurchased and retired related to minimum statutory tax withholding requirements
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
from December 31, 2015 to December 31, 2016
Issuance of common stock under employee stock purchase plan
Shares withheld, repurchased and retired related to minimum statutory tax withholding requirements
Exercise of stock options and issuance of restricted stock awards, net of forfeitures
from December 31, 2014 to December 31, 2015
Common stock issued under benefit plan
Payment of restricted stock tax withholdings
Exercise of stock options, vesting of restricted stock awards
from December 31, 2013 to December 31, 2014
Common stock issued under benefit plan
Payment of restricted stock tax withholdings
Exercise of stock options, vesting of restricted stock awards
from December 31, 2012 to December 31, 2013
Common stock issued under benefit plan
Payment of restricted stock tax withholdings
Exercise of stock options, vesting of restricted stock awards
from December 31, 2011 to December 31, 2012
Common stock issued under benefit plan
Payment of restricted stock withholdings
Exercise of stock options, vesting of restricted stock awards
from December 31, 2010 to December 31, 2011
Common stock issued under benefit plan
Acquisition of treasury stock
Payment of restricted stock withholdings
Exercise of stock options, vesting of restricted stock awards
Common stock issued under benefit plan
Payment of restricted stock withholdings
Exercise of stock options, vesting of restricted stock awards
from December 31, 2008 to December 31, 2009
Common stock issued under benefit plan
Acquisition of treasury stock
Payment of restricted stock withholdings
Exercise of stock options, vesting of restricted stock awards
from December 31,2007 to December 31,2008
Common stock issued under benefit plan
Acquisition of treasury stock
Exercise of stock options, vesting of restricted stock awards
from December 31, 2006 to December 31, 2007
Acquisition of treasury stock
Common stock issued under benefit plan
Exercise of stock options
Retirement of treasury stock
from December 31, 2005 to December 31, 2006
Retirement of treasury stock
Common stock issued under benefit plan
Exercise of stock options
Acquisition of treasury stock
from December 31, 2004 to December 31, 2005
Common stock issued under benefit plan
Exercise of stock options
from December 31, 2003 to December 31, 2004
Issuance of common stock
Common stock issued under benefit plan
from December 31, 2002 to December 31, 2003
Common stock issued under benefit plan
Exercise of warrants
Exercise of stock options
from December 31, 2001 to December 31, 2002
Common stock issued under benefit plan
Exercise of stock options
from December 31, 2000 to December 31, 2001
Sale of common stock
Common stock issued under benefit plan
Exercise of stock options
from December 31, 1999 to December 31, 2000
Sale of common stock
Common stock issued under benefit plan
Exercise of stock options
from December 31, 1998 to December 31, 1999
Common stock issued under benefit plan
Exercise of stock options
from December 31, 1997 to December 31, 1998
Issuance of common stock under benefit plan
Exercise of stock options
from December 31, 1996 to December 31, 1997
Issuance of common stock under benefit plan
Exercise of stock options
from December 31, 1995 to December 31, 1996
Conversion of 1,298,182 sharesof preferred stock to 3,245,500 shares of common stock
Exercise of stock options and warrants
Initial public offering of commonstock, net of issuance costs of $1,736,555
Issuance of common stock under benefit plans