股本结构
单位：万股
| 公告日期 | 2026-08-10 | 2026-08-10 | 2026-06-11 | 2026-05-11 | 2026-04-27 | 2026-05-18 |
|---|---|---|---|---|---|---|
| 证券总股本 | 4804.80 | 4737.60 | 4736.73 | 4734.63 | 4734.33 | 4735.86 |
| 普通股本 | 4804.80 | 4737.60 | 4736.73 | 4734.63 | 4734.33 | 4735.86 |
| 优先股 | 未披露 | 未披露 | 未披露 | 未披露 | 未披露 | 4.10 |
| 其他 | 未披露 | 未披露 | 未披露 | 未披露 | 未披露 | 未披露 |
| 变动日期 | 2026-08-07 | 2026-06-30 | 2026-06-05 | 2026-05-07 | 2026-04-07 | 2026-03-31 |
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 |
|---|---|---|---|---|
| 2026-08-10 | 4804.80 | 未披露 | 定期报告 | 2026-08-07 |
| 2026-08-10 | 4737.60 | 未披露 |
更多>>
From March 31, 2026 to June 30, 2026
Stock-based plan activity
|
2026-06-30 |
| 2026-06-11 | 4736.73 | 未披露 | 定期报告 | 2026-06-05 |
| 2026-05-11 | 4734.63 | 未披露 | 定期报告 | 2026-05-07 |
| 2026-04-27 | 4734.33 | 未披露 | 定期报告 | 2026-04-07 |
| 2026-05-18 | 4735.86 | 4.10 |
更多>>
From December 31,2025 to March 31,2026
Issuance of common stock, net for induced conversion of Series A convertible preferred stock
Issuance of common stock, net
Stock-based plan activity
|
2026-03-31 |
| 2026-03-12 | 4738.80 | 未披露 | 定期报告 | 2026-03-11 |
| 2026-03-12 | 1877.00 | 4.10 |
更多>>
From December 31, 2024 to December 31, 2025
Stock-based plan activity
|
2025-12-31 |
| 2026-01-02 | 1876.96 | 4.13 | 定期报告 | 2025-12-30 |
| 2025-11-05 | 1877.00 | 4.13 | 定期报告 | 2025-10-31 |
| 2025-12-17 | 1879.83 | 4.13 |
更多>>
From June 30, 2025 to September 30, 2025
Stock-based plan activity
|
2025-09-30 |
| 2025-08-11 | 1882.31 | 未披露 | 定期报告 | 2025-08-07 |
| 2025-08-11 | 1886.30 | 4.13 |
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From March 31, 2025 to June 30, 2025
Stock-based plan activity
|
2025-06-30 |
| 2025-04-29 | 1886.54 | 4.13 | 定期报告 | 2025-04-21 |
| 2025-05-12 | 1887.80 | 未披露 |
更多>>
From December 31, 2024 to March 31, 2025
Stock-based plan activity
|
2025-03-31 |
| 2025-03-17 | 1891.59 | 未披露 | 定期报告 | 2025-03-13 |
| 2025-03-17 | 1899.20 | 4.10 |
更多>>
From December 31, 2023 to December 31, 2024
Issuance of common stock, net
Stock-based plan activity
|
2024-12-31 |
| 2024-11-13 | 1907.00 | 未披露 |
更多>>
From June 30, 2024 to September 30, 2024
Issuance of common stock, net
Stock-based plan activity
|
2024-09-30 |
| 2024-09-27 | 1907.03 | 4.13 | 定期报告 | 2024-09-13 |
| 2024-08-19 | 1854.07 | 未披露 |
更多>>
Common stock offered 4,300,000 shares by the company
|
2024-08-19 |
| 2024-08-12 | 1424.07 | 未披露 | 定期报告 | 2024-08-08 |
| 2024-07-19 | 1424.09 | 4.13 | 定期报告 | 2024-07-18 |
| 2024-08-19 | 1418.98 | 4.13 |
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From March 31, 2024 to June 30, 2024
Issuance of common stock, net of issuance costs
Stock-based plan activity
|
2024-06-30 |
| 2024-05-10 | 1385.45 | 未披露 | 定期报告 | 2024-05-08 |
| 2024-04-26 | 1385.47 | 4.13 | 定期报告 | 2024-04-19 |
| 2024-05-10 | 1319.70 | 4.10 |
更多>>
From December 31, 2023 to March 31, 2024
Issuance of common stock, net
Stock-based plan activity
|
2024-03-31 |
| 2024-03-27 | 1320.42 | 未披露 | 定期报告 | 2024-03-25 |
| 2024-02-20 | 1152.87 | 4.13 | 定期报告 | 2024-02-12 |
| 2024-03-27 | 817.80 | 4.10 |
更多>>
From December 31, 2022 to December 31, 2023
Issuance of common stock, net
Stock-based plan activity
|
2023-12-31 |
| 2023-11-14 | 817.78 | 未披露 | 定期报告 | 2023-11-10 |
| 2023-11-14 | 777.80 | 4.10 |
更多>>
From June 30, 2023 to September 30, 2023
Issuance of common stock, net
|
2023-09-30 |
| 2023-08-04 | 777.78 | 未披露 | 定期报告 | 2023-08-01 |
| 2023-04-28 | 707.53 | 4.13 | 定期报告 | 2023-04-19 |
| 2023-04-28 | 707.53 | 未披露 | 定期报告 | 2023-04-15 |
| 2023-05-11 | 694.20 | 未披露 |
更多>>
From December 31, 2022 to March 31, 2023
Stock-based plan activity
|
2023-03-31 |
| 2023-03-30 | 692.33 | 未披露 | 定期报告 | 2023-03-30 |
| 2023-03-30 | 667.00 | 4.10 |
更多>>
From December 31, 2021 to December 31, 2022
Restricted stock awards (cancellations), net
Shares withheld for taxes
|
2022-12-31 |
| 2022-11-14 | 666.99 | 未披露 | 定期报告 | 2022-10-31 |
| 2022-11-14 | 667.00 | 4.10 |
更多>>
From June 30, 2022 to September 30, 2022
Restricted stock awards (cancellations), net
|
2022-09-30 |
| 2022-08-12 | 681.72 | 未披露 | 定期报告 | 2022-07-31 |
| 2022-08-12 | 682.20 | 4.10 |
更多>>
From March 31, 2022 to June 30, 2022
Restricted stock awards (cancellations), net
|
2022-06-30 |
| 2022-04-29 | 675.59 | 4.13 | 定期报告 | 2022-04-18 |
| 2022-04-15 | 666.52 | 未披露 | 定期报告 | 2022-04-09 |
| 2022-05-23 | 666.50 | 4.10 |
更多>>
From December 31, 2021 to March 31, 2022
Stock-based compensation
|
2022-03-31 |
| 2022-04-15 | 663.40 | 4.10 |
更多>>
From December 31, 2020 to December 31, 2021
Restricted stock awards (cancellations), net
Issuance of common stock, net
|
2021-12-31 |
| 2021-12-22 | 644.57 | 未披露 | 定期报告 | 2021-12-15 |
| 2021-11-12 | 644.36 | 未披露 | 定期报告 | 2021-11-08 |
| 2021-11-12 | 219.30 | 未披露 |
更多>>
From June 30, 2021 to September 30, 2021
Restricted stock awards (cancellations), net
|
2021-09-30 |
| 2021-07-22 | 219.06 | 未披露 | 定期报告 | 2021-07-15 |
| 2021-08-13 | 219.40 | 未披露 |
更多>>
From March 31, 2021 to June 30, 2021
Restricted stock awards (cancellations), net
|
2021-06-30 |
| 2021-05-14 | 218.24 | 未披露 | 定期报告 | 2021-05-10 |
| 2021-04-30 | 211.75 | 未披露 | 定期报告 | 2021-04-19 |
| 2021-05-14 | 218.20 | 未披露 |
更多>>
From December 31, 2020 to March 31, 2021
Restricted stock awards (cancellations), net
|
2021-03-31 |
| 2021-03-31 | 208.13 | 未披露 | 定期报告 | 2021-03-25 |
| 2021-03-31 | 208.40 | 未披露 |
更多>>
From December 31, 2019 to December 31, 2020
Restricted stock awards
Retirement of treasury stock
|
2020-12-31 |
| 2020-12-09 | 208.46 | 未披露 |
更多>>
a 1 for 15 split of it's common stock
|
2020-12-14 |
| 2020-11-09 | 3191.43 | 未披露 | 定期报告 | 2020-10-31 |
| 2020-11-03 | 3141.91 | 未披露 | 定期报告 | 2020-10-27 |
| 2020-11-09 | 3142.90 | 未披露 |
更多>>
From June 30, 2020 to September 30, 2020
Restricted stock awards (cancellations), net
|
2020-09-30 |
| 2020-08-10 | 3192.28 | 未披露 | 定期报告 | 2020-07-31 |
| 2020-08-10 | 3143.20 | 未披露 |
更多>>
From March 31, 2020 to June 30, 2020
Restricted stock awards (cancellations), net
|
2020-06-30 |
| 2020-06-19 | 3069.76 | 未披露 | 定期报告 | 2020-06-11 |
| 2020-04-29 | 3188.27 | 未披露 | 定期报告 | 2020-04-24 |
| 2020-06-19 | 3138.90 | 未披露 |
更多>>
From December 31, 2019 to March 31, 2020
Restricted stock awards (cancellations), net
|
2020-03-31 |
| 2020-03-31 | 3195.64 | 未披露 | 定期报告 | 2020-03-25 |
| 2020-03-31 | 3144.10 | 未披露 |
更多>>
from December 31, 2018 to December 31, 2019
Restricted stock awards
|
2019-12-31 |
| 2019-11-08 | 3146.34 | 未披露 | 定期报告 | 2019-10-31 |
| 2019-11-08 | 3146.30 | 未披露 |
更多>>
from June 30, 2019 to September 30, 2019
Restricted stock awards (cancellations), net
|
2019-09-30 |
| 2019-08-09 | 3145.89 | 未披露 | 定期报告 | 2019-08-01 |
| 2019-08-09 | 3146.90 | 未披露 |
更多>>
From March 31, 2019 to June 30, 2019
Restricted stock awards (cancellations), net
|
2019-06-30 |
| 2019-05-10 | 3111.95 | 未披露 | 定期报告 | 2019-05-03 |
| 2019-05-10 | 3112.30 | 未披露 |
更多>>
from December 31, 2018 to March 31, 2019
Restricted stock awards (cancellations), net
|
2019-03-31 |
| 2019-04-08 | 3112.35 | 未披露 | 定期报告 | 2019-03-27 |
| 2019-03-01 | 3131.61 | 未披露 | 定期报告 | 2019-02-22 |
| 2019-03-01 | 3127.30 | 未披露 |
更多>>
From December 31, 2017 To December 31, 2018
Restricted stock awards
|
2018-12-31 |
| 2018-11-07 | 3127.58 | 未披露 | 定期报告 | 2018-11-01 |
| 2018-11-07 | 3126.20 | 未披露 | 定期报告 | 2018-09-30 |
| 2018-08-01 | 3117.64 | 未披露 | 定期报告 | 2018-07-27 |
| 2018-08-01 | 3117.80 | 未披露 | 定期报告 | 2018-06-30 |
| 2018-05-02 | 3112.44 | 未披露 | 定期报告 | 2018-04-27 |
| 2018-05-02 | 3113.30 | 未披露 | 定期报告 | 2018-03-31 |
| 2018-04-06 | 3112.17 | 未披露 | 定期报告 | 2018-03-27 |
| 2018-04-06 | 3072.53 | 未披露 | 定期报告 | 2018-03-26 |
| 2018-03-02 | 3050.08 | 未披露 | 定期报告 | 2018-02-23 |
| 2018-03-02 | 3050.50 | 未披露 |
更多>>
From December 31, 2016 To December 31, 2017
Restricted stock unit conversions
Restricted stock awards
|
2017-12-31 |
| 2017-11-02 | 3047.45 | 未披露 | 定期报告 | 2017-10-27 |
| 2017-11-01 | 3047.80 | 未披露 | 定期报告 | 2017-09-30 |
| 2017-08-02 | 3034.00 | 未披露 | 定期报告 | 2017-07-28 |
| 2017-08-02 | 3034.70 | 未披露 | 定期报告 | 2017-06-30 |
| 2017-05-04 | 3029.84 | 未披露 | 定期报告 | 2017-04-28 |
| 2017-05-04 | 3030.60 | 未披露 | 定期报告 | 2017-03-31 |
| 2017-04-14 | 3005.91 | 未披露 | 定期报告 | 2017-03-27 |
| 2017-03-01 | 3003.50 | 未披露 | 定期报告 | 2017-02-24 |
| 2017-03-01 | 3001.20 | 未披露 |
更多>>
From December 31, 2015 to December 31, 2016
Exercise of stock options
Restricted stock awards
Treasury stock
|
2016-12-31 |
| 2017-01-05 | 2998.93 | 未披露 | 定期报告 | 2016-10-31 |
| 2016-11-01 | 2999.60 | 未披露 | 定期报告 | 2016-09-30 |
| 2016-08-03 | 2999.83 | 未披露 | 定期报告 | 2016-07-29 |
| 2016-08-02 | 2999.80 | 未披露 | 定期报告 | 2016-06-30 |
| 2016-05-04 | 2993.58 | 未披露 | 定期报告 | 2016-04-29 |
| 2016-05-04 | 2994.00 | 未披露 | 定期报告 | 2016-03-31 |
| 2016-04-15 | 2994.03 | 未披露 | 定期报告 | 2016-03-23 |
| 2016-02-26 | 2941.25 | 未披露 | 定期报告 | 2016-02-19 |
| 2016-02-26 | 2953.90 | 未披露 |
更多>>
from December 31, 2014 to December 31, 2015
Exercise of stock options
Restricted stock awards
|
2015-12-31 |
| 2015-11-04 | 2951.89 | 未披露 | 定期报告 | 2015-10-30 |
| 2015-11-03 | 2951.90 | 未披露 | 定期报告 | 2015-09-30 |
| 2015-08-05 | 2950.03 | 未披露 | 定期报告 | 2015-07-31 |
| 2015-08-04 | 2950.20 | 未披露 | 定期报告 | 2015-06-30 |
| 2015-05-06 | 2948.22 | 未披露 | 定期报告 | 2015-05-01 |
| 2015-05-05 | 2949.30 | 未披露 | 定期报告 | 2015-03-31 |
| 2015-04-16 | 2949.28 | 未披露 | 定期报告 | 2015-03-25 |
| 2015-02-27 | 2911.00 | 未披露 | 定期报告 | 2015-02-20 |
| 2015-02-27 | 2909.70 | 未披露 |
更多>>
from December 31, 2013 to December 31, 2014
Exercise of stock options
Restricted stock awards
|
2014-12-31 |
| 2014-11-06 | 2909.30 | 未披露 | 定期报告 | 2014-10-31 |
| 2014-11-04 | 2909.50 | 未披露 | 定期报告 | 2014-09-30 |
| 2014-08-07 | 2905.57 | 未披露 | 定期报告 | 2014-08-01 |
| 2014-08-05 | 2905.90 | 未披露 | 定期报告 | 2014-06-30 |
| 2014-05-08 | 2902.20 | 未披露 | 定期报告 | 2014-05-01 |
| 2014-05-08 | 2900.60 | 未披露 | 定期报告 | 2014-03-31 |
| 2014-04-17 | 2900.63 | 未披露 | 定期报告 | 2014-03-26 |
| 2014-03-03 | 2885.89 | 未披露 | 定期报告 | 2014-02-21 |
| 2014-03-03 | 2884.50 | 未披露 |
更多>>
from December 31, 2012 to December 31, 2013
Exercise of stock options
Restricted stock awards
|
2013-12-31 |
| 2013-11-05 | 2880.33 | 未披露 | 定期报告 | 2013-11-01 |
| 2013-11-04 | 2880.10 | 未披露 | 定期报告 | 2013-09-30 |
| 2013-08-07 | 2878.63 | 未披露 | 定期报告 | 2013-08-01 |
| 2013-08-06 | 2878.60 | 未披露 | 定期报告 | 2013-06-30 |
| 2013-05-08 | 2864.66 | 未披露 | 定期报告 | 2013-05-01 |
| 2013-05-08 | 2864.60 | 未披露 | 定期报告 | 2013-03-31 |
| 2013-04-18 | 2863.17 | 未披露 | 定期报告 | 2013-03-25 |
| 2013-03-08 | 2823.40 | 未披露 | 定期报告 | 2013-03-01 |
| 2013-03-08 | 2821.80 | 未披露 |
更多>>
from December 31, 2011 to December 31, 2012
Exercise of stock options
Restricted stock awards
|
2012-12-31 |
| 2012-11-09 | 2818.90 | 未披露 | 定期报告 | 2012-11-05 |
| 2012-11-08 | 2818.90 | 未披露 | 定期报告 | 2012-09-30 |
| 2012-08-09 | 2817.10 | 未披露 | 定期报告 | 2012-07-31 |
| 2012-08-02 | 2817.20 | 未披露 | 定期报告 | 2012-06-30 |
| 2012-05-04 | 2815.79 | 未披露 | 定期报告 | 2012-04-30 |
| 2012-05-03 | 2815.80 | 未披露 | 定期报告 | 2012-03-31 |
| 2012-03-12 | 2813.97 | 未披露 | 定期报告 | 2012-02-29 |
| 2012-03-08 | 2769.90 | 未披露 | 定期报告 | 2011-12-31 |
| 2011-11-09 | 2768.32 | 未披露 | 定期报告 | 2011-10-31 |
| 2011-11-09 | 2768.30 | 未披露 | 定期报告 | 2011-09-30 |
| 2011-08-09 | 2763.28 | 未披露 | 定期报告 | 2011-08-01 |
| 2011-08-04 | 2763.30 | 未披露 | 定期报告 | 2011-06-30 |
| 2011-05-09 | 2754.51 | 未披露 | 定期报告 | 2011-05-02 |
| 2011-05-09 | 2754.70 | 未披露 | 定期报告 | 2011-03-31 |
| 2011-03-14 | 2715.19 | 未披露 | 定期报告 | 2011-02-28 |
| 2011-03-14 | 2708.30 | 未披露 |
更多>>
from December 31, 2009 to December 31, 2010
Exercise of stock options
Restricted stock awards
|
2010-12-31 |
| 2010-11-05 | 2708.04 | 未披露 | 定期报告 | 2010-11-01 |
| 2010-11-05 | 2708.00 | 未披露 | 定期报告 | 2010-09-30 |
| 2010-08-05 | 2707.82 | 未披露 | 定期报告 | 2010-08-02 |
| 2010-08-05 | 2708.00 | 未披露 | 定期报告 | 2010-06-30 |
| 2010-03-11 | 2703.13 | 未披露 | 定期报告 | 2010-03-05 |
| 2010-03-11 | 2694.50 | 未披露 |
更多>>
from December 31, 2008 to December 31, 2009
Exercise of stock options
Restricted stock awards
Treasury stock
|
2009-12-31 |
| 2009-03-12 | 2692.91 | 未披露 | 定期报告 | 2009-03-06 |
| 2009-03-12 | 2667.90 | 未披露 |
更多>>
from December 31, 2007 to December 31, 2008
Exercise of stock options
Restricted stock awards
|
2008-12-31 |
| 2008-03-12 | 2660.18 | 未披露 | 定期报告 | 2008-03-05 |
| 2008-03-12 | 2659.60 | 未披露 |
更多>>
from December 31, 2006 to December 31, 2007
Exercise of stock options
Restricted stock awards
|
2007-12-31 |
| 2007-03-16 | 2643.01 | 未披露 | 定期报告 | 2007-03-06 |
| 2007-03-16 | 2642.40 | 未披露 |
更多>>
from December 31, 2005 to December 31, 2006
Exercise of stock options
Restricted stock awards
|
2006-12-31 |
| 2006-03-31 | 2631.39 | 未披露 | 定期报告 | 2006-03-29 |
| 2006-03-31 | 2629.00 | 未披露 |
更多>>
from December 31, 2004 to December 31, 2005
Exercise of stock options
Restricted stock awards
|
2005-12-31 |
| 2005-03-10 | 2575.44 | 未披露 | 定期报告 | 2005-03-09 |
| 2005-03-10 | 2575.10 | 未披露 |
更多>>
from December 31, 2003 to December 31, 2004
Exercise of stock options
Secondary stock offering, net of offering costs of $2.3 million
|
2004-12-31 |
| 2004-03-29 | 2560.42 | 未披露 | 定期报告 | 2004-03-24 |
| 2004-03-29 | 1984.70 | 未披露 |
更多>>
from December 31, 2002 to December 31, 2003
Exercise of stock options
|
2003-12-31 |
| 2003-03-28 | 1973.78 | 未披露 | 定期报告 | 2003-03-21 |
| 2003-03-28 | 1973.70 | 未披露 |
更多>>
from December 31, 2001 to December 31, 2002
Exercise of stock options
|
2002-12-31 |
| 2002-03-28 | 1971.98 | 未披露 | 定期报告 | 2002-03-20 |
| 1998-03-31 | 1971.73 | 未披露 |
更多>>
from December 31, 1996 to December 31, 1997
Issuance of stock resulting from Formation
Issuance of stock in Offering, net
|
1997-12-31 |
From March 31, 2026 to June 30, 2026
Stock-based plan activity
From December 31,2025 to March 31,2026
Issuance of common stock, net for induced conversion of Series A convertible preferred stock
Issuance of common stock, net
Stock-based plan activity
From December 31, 2024 to December 31, 2025
Stock-based plan activity
From June 30, 2025 to September 30, 2025
Stock-based plan activity
From March 31, 2025 to June 30, 2025
Stock-based plan activity
From December 31, 2024 to March 31, 2025
Stock-based plan activity
From December 31, 2023 to December 31, 2024
Issuance of common stock, net
Stock-based plan activity
From June 30, 2024 to September 30, 2024
Issuance of common stock, net
Stock-based plan activity
Common stock offered 4,300,000 shares by the company
From March 31, 2024 to June 30, 2024
Issuance of common stock, net of issuance costs
Stock-based plan activity
From December 31, 2023 to March 31, 2024
Issuance of common stock, net
Stock-based plan activity
From December 31, 2022 to December 31, 2023
Issuance of common stock, net
Stock-based plan activity
From June 30, 2023 to September 30, 2023
Issuance of common stock, net
From December 31, 2022 to March 31, 2023
Stock-based plan activity
From December 31, 2021 to December 31, 2022
Restricted stock awards (cancellations), net
Shares withheld for taxes
From June 30, 2022 to September 30, 2022
Restricted stock awards (cancellations), net
From March 31, 2022 to June 30, 2022
Restricted stock awards (cancellations), net
From December 31, 2021 to March 31, 2022
Stock-based compensation
From December 31, 2020 to December 31, 2021
Restricted stock awards (cancellations), net
Issuance of common stock, net
From June 30, 2021 to September 30, 2021
Restricted stock awards (cancellations), net
From March 31, 2021 to June 30, 2021
Restricted stock awards (cancellations), net
From December 31, 2020 to March 31, 2021
Restricted stock awards (cancellations), net
From December 31, 2019 to December 31, 2020
Restricted stock awards
Retirement of treasury stock
a 1 for 15 split of it's common stock
From June 30, 2020 to September 30, 2020
Restricted stock awards (cancellations), net
From March 31, 2020 to June 30, 2020
Restricted stock awards (cancellations), net
From December 31, 2019 to March 31, 2020
Restricted stock awards (cancellations), net
from December 31, 2018 to December 31, 2019
Restricted stock awards
from June 30, 2019 to September 30, 2019
Restricted stock awards (cancellations), net
From March 31, 2019 to June 30, 2019
Restricted stock awards (cancellations), net
from December 31, 2018 to March 31, 2019
Restricted stock awards (cancellations), net
From December 31, 2017 To December 31, 2018
Restricted stock awards
From December 31, 2016 To December 31, 2017
Restricted stock unit conversions
Restricted stock awards
From December 31, 2015 to December 31, 2016
Exercise of stock options
Restricted stock awards
Treasury stock
from December 31, 2014 to December 31, 2015
Exercise of stock options
Restricted stock awards
from December 31, 2013 to December 31, 2014
Exercise of stock options
Restricted stock awards
from December 31, 2012 to December 31, 2013
Exercise of stock options
Restricted stock awards
from December 31, 2011 to December 31, 2012
Exercise of stock options
Restricted stock awards
from December 31, 2009 to December 31, 2010
Exercise of stock options
Restricted stock awards
from December 31, 2008 to December 31, 2009
Exercise of stock options
Restricted stock awards
Treasury stock
from December 31, 2007 to December 31, 2008
Exercise of stock options
Restricted stock awards
from December 31, 2006 to December 31, 2007
Exercise of stock options
Restricted stock awards
from December 31, 2005 to December 31, 2006
Exercise of stock options
Restricted stock awards
from December 31, 2004 to December 31, 2005
Exercise of stock options
Restricted stock awards
from December 31, 2003 to December 31, 2004
Exercise of stock options
Secondary stock offering, net of offering costs of $2.3 million
from December 31, 2002 to December 31, 2003
Exercise of stock options
from December 31, 2001 to December 31, 2002
Exercise of stock options
from December 31, 1996 to December 31, 1997
Issuance of stock resulting from Formation
Issuance of stock in Offering, net