股本结构
单位：万股
| 公告日期 | 2025-11-06 | 2025-11-06 | 2025-08-07 | 2025-08-07 | 2025-04-28 | 2025-05-07 |
|---|---|---|---|---|---|---|
| 证券总股本 | 3076.48 | 3070.00 | 3055.72 | 3048.70 | 3032.66 | 3002.30 |
| 普通股本 | 3076.48 | 3070.00 | 3055.72 | 3048.70 | 3032.66 | 3002.30 |
| 优先股 | 未披露 | 未披露 | 未披露 | 未披露 | 225.00 | 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 | 2025-10-31 | 2025-09-30 | 2025-08-01 | 2025-06-30 | 2025-04-21 | 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 | 3076.48 | 未披露 | 定期报告 | 2025-10-31 |
| 2025-11-06 | 3070.00 | 未披露 |
更多>>
From June 30, 2025 to September 30, 2025
Issuance of common stock in connection with equity incentive plans
Repurchase of shares to satisfy employee tax withholding obligations
|
2025-09-30 |
| 2025-08-07 | 3055.72 | 未披露 | 定期报告 | 2025-08-01 |
| 2025-08-07 | 3048.70 | 未披露 |
更多>>
From March 31, 2025 to June 30, 2025
Issuance of common stock for employee stock purchase program
Repurchase of shares to satisfy employee tax withholding obligations
|
2025-06-30 |
| 2025-04-28 | 3032.66 | 225.00 | 定期报告 | 2025-04-21 |
| 2025-05-07 | 3002.30 | 未披露 |
更多>>
From December 31, 2024 to March 31, 2025
Issuance of common stock in connection with equity incentive plans
Repurchase of shares to satisfy employee tax withholding obligations
|
2025-03-31 |
| 2025-02-27 | 2994.26 | 未披露 | 定期报告 | 2025-02-21 |
| 2025-02-27 | 2984.60 | 225.00 |
更多>>
From December 31, 2023 to December 31, 2024
Repurchase of shares to satisfy employee tax withholding obligations
Issuance of common stock in connection with equity incentive plans
Issuance of common stock for employee stock purchase program
|
2024-12-31 |
| 2024-11-06 | 2963.37 | 未披露 | 定期报告 | 2024-11-01 |
| 2024-11-06 | 2954.00 | 未披露 |
更多>>
From June 30, 2024 to September 30, 2024
Issuance of common stock in connection with equity incentive plans
Repurchase of shares to satisfy employee tax withholding obligations
|
2024-09-30 |
| 2024-08-07 | 2940.54 | 未披露 | 定期报告 | 2024-08-02 |
| 2024-08-07 | 2930.00 | 未披露 |
更多>>
From March 31, 2024 to June 30, 2024
Issuance of common stock for employee stock purchase program
Repurchase of shares to satisfy employee tax withholding obligations
|
2024-06-30 |
| 2024-05-07 | 2912.35 | 未披露 | 定期报告 | 2024-05-03 |
| 2024-04-26 | 2912.11 | 225.00 | 定期报告 | 2024-04-15 |
| 2024-02-29 | 2893.85 | 未披露 | 定期报告 | 2024-02-23 |
| 2024-02-29 | 2862.90 | 225.00 |
更多>>
From December 31, 2022 to December 31, 2023
Issuance of common stock in connection with equity incentive plans
Issuance of common stock for employee stock purchase program
|
2023-12-31 |
| 2023-11-09 | 2836.48 | 未披露 | 定期报告 | 2023-11-03 |
| 2023-08-08 | 2808.88 | 未披露 | 定期报告 | 2023-07-31 |
| 2023-05-01 | 2770.80 | 225.00 | 定期报告 | 2023-04-17 |
| 2023-05-09 | 2766.50 | 未披露 |
更多>>
From December 31, 2022 to March 31, 2023
Issuance of common stock in connection with equity incentive plans
Repurchase of shares to satisfy employee tax withholding obligations
|
2023-03-31 |
| 2023-03-01 | 2761.37 | 未披露 | 定期报告 | 2023-02-15 |
| 2023-03-01 | 2756.20 | 225.00 |
更多>>
From December 31, 2021 to December 31, 2022
Repurchase of shares to satisfy employee tax withholding obligations
Issuance of common stock in connection with equity incentive plans
Issuance of common stock for employee stock purchase program
|
2022-12-31 |
| 2022-11-08 | 2742.23 | 未披露 | 定期报告 | 2022-10-31 |
| 2022-08-09 | 2725.72 | 未披露 | 定期报告 | 2022-07-29 |
| 2022-08-09 | 2720.60 | 未披露 |
更多>>
From March 31, 2022 to June 30, 2022
Issuance of common stock in connection with equity incentive plans
Issuance of common stock for employee stock purchase program
Repurchase of shares to satisfy employee tax withholding obligations
|
2022-06-30 |
| 2022-05-06 | 2683.64 | 未披露 | 定期报告 | 2022-04-22 |
| 2022-05-02 | 2683.57 | 225.00 | 定期报告 | 2022-04-19 |
| 2022-05-06 | 2682.70 | 未披露 |
更多>>
From December 31, 2021 to March 31, 2022
Issuance of common stock in connection with equity incentive plans
Repurchase of shares to satisfy employee tax withholding obligations
|
2022-03-31 |
| 2022-03-01 | 2677.40 | 未披露 | 定期报告 | 2022-02-15 |
| 2022-03-01 | 2668.80 | 225.00 |
更多>>
From December 31, 2020 to December 31, 2021
Issuance of common stock in connection with equity incentive plans
Repurchase of shares to satisfy employee tax withholding obligations
Issuance of common stock for employee stock purchase program
|
2021-12-31 |
| 2021-11-08 | 2638.81 | 未披露 | 定期报告 | 2021-11-01 |
| 2021-11-08 | 2634.90 | 未披露 |
更多>>
From June 30, 2021 to September 30, 2021
Issuance of common stock in connection with equity incentive plans
|
2021-09-30 |
| 2021-08-09 | 2618.57 | 未披露 | 定期报告 | 2021-07-31 |
| 2021-08-09 | 2616.90 | 未披露 |
更多>>
From March 31, 2021 to June 30, 2021
Issuance of common stock in connection with equity incentive plans
Issuance of common stock for employee stock purchase program
Repurchase of shares to satisfy employee tax withholding obligations
|
2021-06-30 |
| 2021-06-30 | 2615.93 | 未披露 | 定期报告 | 2021-06-28 |
| 2021-05-17 | 2613.60 | 225.00 | 定期报告 | 2021-05-10 |
| 2021-04-29 | 2609.10 | 未披露 | 定期报告 | 2021-04-23 |
| 2021-05-10 | 2608.10 | 未披露 |
更多>>
From December 31, 2020 to March 31, 2021
Issuance of common stock in connection with equity incentive plans
Repurchase of shares to satisfy employee tax withholding obligations
|
2021-03-31 |
| 2021-02-26 | 2593.26 | 未披露 | 定期报告 | 2021-02-16 |
| 2021-02-26 | 2592.40 | 未披露 |
更多>>
From December 31, 2019 to December 31, 2020
Issuance of common stock in connection with equity incentive plans
Shares issued in equity offering
Settlement of earnout liability
Repurchase of shares to satisfy employee tax withholding obligations
|
2020-12-31 |
| 2020-11-05 | 2589.73 | 未披露 | 定期报告 | 2020-10-31 |
| 2020-11-05 | 2583.80 | 未披露 |
更多>>
From June 30, 2020 to September 30, 2020
Issuance of common stock in connection with equity incentive plans
Repurchase of shares to satisfy employee tax withholding obligations
|
2020-09-30 |
| 2020-08-06 | 2574.99 | 未披露 | 定期报告 | 2020-07-31 |
| 2020-08-06 | 2567.50 | 未披露 |
更多>>
From December 31, 2019 to June 30, 2020
Issuance of common stock in connection with equity incentive plans
Shares issued in equity offering
Settlement of earnout liability
Repurchase of shares to satisfy employee tax withholding obligations
|
2020-06-30 |
| 2020-05-11 | 2561.40 | 未披露 | 定期报告 | 2020-04-30 |
| 2020-04-28 | 2561.20 | 未披露 | 定期报告 | 2020-04-17 |
| 2020-05-11 | 2558.02 | 未披露 |
更多>>
From December 31, 2019 to March 31, 2020
Issuance of common stock in connection with exercise of common stock options
Shares issued in equity offering
Settlement of earnout liability
|
2020-03-31 |
| 2020-03-06 | 2525.77 | 未披露 | 定期报告 | 2020-03-06 |
| 2020-03-02 | 2345.77 | 未披露 | 定期报告 | 2020-02-18 |
| 2020-03-02 | 2313.60 | 未披露 |
更多>>
from December 31, 2018 to December 31, 2019
Issuance of common stock in connection with exercise of common stock options
Repurchase of shares to satisfy employee tax withholding obligations
Shares issued in equity offering
Settlement of earnout liability
|
2019-12-31 |
| 2019-11-08 | 2309.82 | 未披露 | 定期报告 | 2019-10-31 |
| 2019-11-08 | 2303.10 | 未披露 |
更多>>
from June 30, 2019 to September 30, 2019
Issuance of common stock in connection with exercise of common stock options and release of vested restricted stock units, net of cash used to net-share settle equity awards
Common stock traded for employee tax obligations
|
2019-09-30 |
| 2019-08-08 | 2280.60 | 未披露 | 定期报告 | 2019-07-31 |
| 2019-08-08 | 2278.50 | 未披露 |
更多>>
from March 31, 2019 to June 30, 2019
Issuance of common stock in connection with exercise of common stock options and release of vested restricted stock units, net of cash used to net-share settle equity awards
Common stock traded for employee tax obligation
|
2019-06-30 |
| 2019-05-07 | 2264.91 | 未披露 | 定期报告 | 2019-04-30 |
| 2019-04-29 | 2264.64 | 未披露 | 定期报告 | 2019-04-15 |
| 2019-05-07 | 2264.00 | 未披露 |
更多>>
from December 31, 2018 to March 31, 2019
Issuance of common stock in connection with exercise of common stock options and release of vested restricted stock units, net of cash used to net settle equity awards
Stock issued in equity offering
Stock issued for GoMedigap earnout
Common stock traded for employee tax obligation
|
2019-03-31 |
| 2019-03-14 | 2254.58 | 未披露 | 定期报告 | 2019-02-28 |
| 2019-03-14 | 1943.71 | 未披露 |
更多>>
from December 31, 2017 to December 31, 2018
Issuance of common stock in connection with exercise of common stock options and release of vested restricted stock units, net of cash used to net settle equity awards
Common stock traded for employee tax obligation
Stock issued for GMG acquisition
|
2018-12-31 |
| 2018-11-06 | 1940.65 | 未披露 | 定期报告 | 2018-10-31 |
| 2018-12-17 | 1934.44 | 未披露 | 定期报告 | 2018-09-30 |
| 2018-08-07 | 1917.58 | 未披露 | 定期报告 | 2018-07-31 |
| 2018-05-09 | 1899.30 | 未披露 | 定期报告 | 2018-04-30 |
| 2018-04-30 | 1898.32 | 未披露 | 定期报告 | 2018-04-16 |
| 2018-04-30 | 1896.45 | 未披露 | 定期报告 | 2018-03-31 |
| 2018-03-19 | 1893.80 | 未披露 | 定期报告 | 2018-02-28 |
| 2018-03-19 | 1864.20 | 未披露 |
更多>>
from December 31, 2016 to December 31, 2017
Issuance of common stock in connection with exercise of common stock options and release of vested restricted stock units, net of cash used to net settle equity awards
|
2017-12-31 |
| 2017-11-07 | 1862.23 | 未披露 | 定期报告 | 2017-10-31 |
| 2017-08-07 | 1853.53 | 未披露 | 定期报告 | 2017-07-31 |
| 2017-05-05 | 1843.12 | 未披露 | 定期报告 | 2017-04-30 |
| 2017-05-01 | 1843.12 | 未披露 | 定期报告 | 2017-04-17 |
| 2017-05-01 | 1841.65 | 未披露 | 定期报告 | 2017-03-31 |
| 2017-03-16 | 1835.70 | 未披露 | 定期报告 | 2017-02-28 |
| 2017-03-16 | 1835.66 | 未披露 |
更多>>
from December 31, 2015 to December 31, 2016
Issuance of common stock in connection with exercise of common stock options and release of vested restricted stock units, net of cash used to net settle equity awards
|
2016-12-31 |
| 2016-11-08 | 1834.15 | 未披露 | 定期报告 | 2016-10-31 |
| 2016-08-08 | 1832.69 | 未披露 | 定期报告 | 2016-08-01 |
| 2016-05-09 | 1820.83 | 未披露 | 定期报告 | 2016-05-01 |
| 2016-04-29 | 1820.82 | 未披露 | 定期报告 | 2016-04-18 |
| 2016-03-14 | 1814.52 | 未披露 | 定期报告 | 2016-02-29 |
| 2016-03-14 | 1814.50 | 未披露 |
更多>>
from December 31, 2014 to December 31, 2015
Issuance of common stock in connection with exercise of common stock options and release of vested restricted stock units, net of cash used to net settle equity awards
|
2015-12-31 |
| 2015-11-06 | 1811.75 | 未披露 | 定期报告 | 2015-10-30 |
| 2015-08-07 | 1808.02 | 未披露 | 定期报告 | 2015-07-31 |
| 2015-05-08 | 1790.89 | 未披露 | 定期报告 | 2015-05-01 |
| 2015-04-21 | 1790.78 | 未披露 | 定期报告 | 2015-04-09 |
| 2015-03-16 | 1783.08 | 未披露 | 定期报告 | 2015-02-28 |
| 2015-03-16 | 1783.03 | 未披露 |
更多>>
from December 31, 2013 to December 31, 2014
Issuance of common stock in connection with exercise of common stock options and release of vested restricted stock units, net of cash used to net settle equity awards
Repurchases of common stock
|
2014-12-31 |
| 2014-11-10 | 1781.79 | 未披露 | 定期报告 | 2014-11-01 |
| 2014-08-08 | 1776.71 | 未披露 | 定期报告 | 2014-08-01 |
| 2014-05-09 | 1902.39 | 未披露 | 定期报告 | 2014-04-30 |
| 2014-04-28 | 1902.27 | 未披露 | 定期报告 | 2014-04-17 |
| 2014-03-12 | 1887.53 | 未披露 | 定期报告 | 2014-02-28 |
| 2014-03-12 | 1878.08 | 未披露 |
更多>>
from December 31, 2012 to December 31, 2013
Issuance of common stock in connection with exercise of common stock options and release of vested restricted stock units, net of cash used to net settle equity awards
Repurchases of common stock
|
2013-12-31 |
| 2013-11-08 | 1862.13 | 未披露 | 定期报告 | 2013-10-31 |
| 2013-08-07 | 1841.60 | 未披露 | 定期报告 | 2013-07-31 |
| 2013-05-07 | 1946.79 | 未披露 | 定期报告 | 2013-04-30 |
| 2013-04-25 | 1946.00 | 未披露 | 定期报告 | 2013-04-22 |
| 2013-03-13 | 2092.33 | 未披露 | 定期报告 | 2013-02-28 |
| 2013-03-13 | 2044.98 | 未披露 |
更多>>
from December 31, 2011 to December 31, 2012
Issuance of common stock in connection with exercise of common stock options and release of vested restricted stock units, net of cash used to net settle equity awards
Repurchases of common stock
|
2012-12-31 |
| 2012-11-06 | 2025.17 | 未披露 | 定期报告 | 2012-10-31 |
| 2012-08-09 | 1973.47 | 未披露 | 定期报告 | 2012-07-31 |
| 2012-05-08 | 1958.84 | 未披露 | 定期报告 | 2012-04-30 |
| 2012-03-15 | 1947.66 | 未披露 | 定期报告 | 2012-02-29 |
| 2012-03-15 | 1988.28 | 未披露 |
更多>>
from Dec 31,2010 to Dec 31,2011
Issuance of common stock in connection with exercise of common stock options and release of vested restricted stock units, net of cash used to net settle equity awards
Repurchase of common stock
|
2011-12-31 |
| 2011-11-08 | 2004.41 | 未披露 | 定期报告 | 2011-10-31 |
| 2011-08-05 | 2140.68 | 未披露 | 定期报告 | 2011-07-29 |
| 2011-05-06 | 2138.75 | 未披露 | 定期报告 | 2011-04-30 |
| 2011-03-15 | 2134.90 | 未披露 | 定期报告 | 2011-02-28 |
| 2011-03-15 | 2157.47 | 未披露 |
更多>>
Issuance of common stock in connection with exercise of common stock options and release of vested restricted stock units
|
2010-12-31 |
| 2010-11-09 | 2219.53 | 未披露 | 定期报告 | 2010-10-29 |
| 2010-08-09 | 2354.65 | 未披露 | 定期报告 | 2010-07-30 |
| 2010-05-10 | 2352.40 | 未披露 | 定期报告 | 2010-04-30 |
| 2010-03-05 | 2347.73 | 未披露 | 定期报告 | 2010-02-26 |
| 2010-03-05 | 2341.67 | 未披露 |
更多>>
from December 31, 2008 to December 31, 2009
Issuance of common stock in connection with exercise of common stock options and release of vested restricted stock units
Stock-based compensation related to employees
Tax benefit for stock option transactions
|
2009-12-31 |
| 2009-03-13 | 2490.46 | 未披露 | 定期报告 | 2009-02-28 |
| 2009-03-13 | 2504.09 | 未披露 |
更多>>
from December 31, 2007 to December 31, 2008
Issuance of common stock in connection with exercise of common stock options and release of vested restricted stock units
Purchases of treasury stock
|
2008-12-31 |
| 2008-03-17 | 2480.61 | 未披露 | 定期报告 | 2008-02-29 |
| 2008-03-17 | 2468.68 | 未披露 |
更多>>
from December 31, 2006 to December 31, 2007
Issuance of common stock in connection with exercise of common stock options and release of vested restricted stock units
Termination of employee restricted common stock awards
|
2007-12-31 |
| 2007-03-21 | 2177.73 | 未披露 | 定期报告 | 2007-02-28 |
| 2007-03-21 | 2174.89 | 未披露 |
更多>>
from December 31, 2005 to December 31, 2006
Issuance of Class A nonvoting restricted common stock awards to employees, net of reversals for terminated employees
Issuance of common stock in connection with exercise of common stock options
|
2006-12-31 |
From June 30, 2025 to September 30, 2025
Issuance of common stock in connection with equity incentive plans
Repurchase of shares to satisfy employee tax withholding obligations
From March 31, 2025 to June 30, 2025
Issuance of common stock for employee stock purchase program
Repurchase of shares to satisfy employee tax withholding obligations
From December 31, 2024 to March 31, 2025
Issuance of common stock in connection with equity incentive plans
Repurchase of shares to satisfy employee tax withholding obligations
From December 31, 2023 to December 31, 2024
Repurchase of shares to satisfy employee tax withholding obligations
Issuance of common stock in connection with equity incentive plans
Issuance of common stock for employee stock purchase program
From June 30, 2024 to September 30, 2024
Issuance of common stock in connection with equity incentive plans
Repurchase of shares to satisfy employee tax withholding obligations
From March 31, 2024 to June 30, 2024
Issuance of common stock for employee stock purchase program
Repurchase of shares to satisfy employee tax withholding obligations
From December 31, 2022 to December 31, 2023
Issuance of common stock in connection with equity incentive plans
Issuance of common stock for employee stock purchase program
From December 31, 2022 to March 31, 2023
Issuance of common stock in connection with equity incentive plans
Repurchase of shares to satisfy employee tax withholding obligations
From December 31, 2021 to December 31, 2022
Repurchase of shares to satisfy employee tax withholding obligations
Issuance of common stock in connection with equity incentive plans
Issuance of common stock for employee stock purchase program
From March 31, 2022 to June 30, 2022
Issuance of common stock in connection with equity incentive plans
Issuance of common stock for employee stock purchase program
Repurchase of shares to satisfy employee tax withholding obligations
From December 31, 2021 to March 31, 2022
Issuance of common stock in connection with equity incentive plans
Repurchase of shares to satisfy employee tax withholding obligations
From December 31, 2020 to December 31, 2021
Issuance of common stock in connection with equity incentive plans
Repurchase of shares to satisfy employee tax withholding obligations
Issuance of common stock for employee stock purchase program
From June 30, 2021 to September 30, 2021
Issuance of common stock in connection with equity incentive plans
From March 31, 2021 to June 30, 2021
Issuance of common stock in connection with equity incentive plans
Issuance of common stock for employee stock purchase program
Repurchase of shares to satisfy employee tax withholding obligations
From December 31, 2020 to March 31, 2021
Issuance of common stock in connection with equity incentive plans
Repurchase of shares to satisfy employee tax withholding obligations
From December 31, 2019 to December 31, 2020
Issuance of common stock in connection with equity incentive plans
Shares issued in equity offering
Settlement of earnout liability
Repurchase of shares to satisfy employee tax withholding obligations
From June 30, 2020 to September 30, 2020
Issuance of common stock in connection with equity incentive plans
Repurchase of shares to satisfy employee tax withholding obligations
From December 31, 2019 to June 30, 2020
Issuance of common stock in connection with equity incentive plans
Shares issued in equity offering
Settlement of earnout liability
Repurchase of shares to satisfy employee tax withholding obligations
From December 31, 2019 to March 31, 2020
Issuance of common stock in connection with exercise of common stock options
Shares issued in equity offering
Settlement of earnout liability
from December 31, 2018 to December 31, 2019
Issuance of common stock in connection with exercise of common stock options
Repurchase of shares to satisfy employee tax withholding obligations
Shares issued in equity offering
Settlement of earnout liability
from June 30, 2019 to September 30, 2019
Issuance of common stock in connection with exercise of common stock options and release of vested restricted stock units, net of cash used to net-share settle equity awards
Common stock traded for employee tax obligations
from March 31, 2019 to June 30, 2019
Issuance of common stock in connection with exercise of common stock options and release of vested restricted stock units, net of cash used to net-share settle equity awards
Common stock traded for employee tax obligation
from December 31, 2018 to March 31, 2019
Issuance of common stock in connection with exercise of common stock options and release of vested restricted stock units, net of cash used to net settle equity awards
Stock issued in equity offering
Stock issued for GoMedigap earnout
Common stock traded for employee tax obligation
from December 31, 2017 to December 31, 2018
Issuance of common stock in connection with exercise of common stock options and release of vested restricted stock units, net of cash used to net settle equity awards
Common stock traded for employee tax obligation
Stock issued for GMG acquisition
from December 31, 2016 to December 31, 2017
Issuance of common stock in connection with exercise of common stock options and release of vested restricted stock units, net of cash used to net settle equity awards
from December 31, 2015 to December 31, 2016
Issuance of common stock in connection with exercise of common stock options and release of vested restricted stock units, net of cash used to net settle equity awards
from December 31, 2014 to December 31, 2015
Issuance of common stock in connection with exercise of common stock options and release of vested restricted stock units, net of cash used to net settle equity awards
from December 31, 2013 to December 31, 2014
Issuance of common stock in connection with exercise of common stock options and release of vested restricted stock units, net of cash used to net settle equity awards
Repurchases of common stock
from December 31, 2012 to December 31, 2013
Issuance of common stock in connection with exercise of common stock options and release of vested restricted stock units, net of cash used to net settle equity awards
Repurchases of common stock
from December 31, 2011 to December 31, 2012
Issuance of common stock in connection with exercise of common stock options and release of vested restricted stock units, net of cash used to net settle equity awards
Repurchases of common stock
from Dec 31,2010 to Dec 31,2011
Issuance of common stock in connection with exercise of common stock options and release of vested restricted stock units, net of cash used to net settle equity awards
Repurchase of common stock
Issuance of common stock in connection with exercise of common stock options and release of vested restricted stock units
from December 31, 2008 to December 31, 2009
Issuance of common stock in connection with exercise of common stock options and release of vested restricted stock units
Stock-based compensation related to employees
Tax benefit for stock option transactions
from December 31, 2007 to December 31, 2008
Issuance of common stock in connection with exercise of common stock options and release of vested restricted stock units
Purchases of treasury stock
from December 31, 2006 to December 31, 2007
Issuance of common stock in connection with exercise of common stock options and release of vested restricted stock units
Termination of employee restricted common stock awards
from December 31, 2005 to December 31, 2006
Issuance of Class A nonvoting restricted common stock awards to employees, net of reversals for terminated employees
Issuance of common stock in connection with exercise of common stock options