股本结构
单位：万股
| 公告日期 | 2026-07-22 | 2026-08-10 | 2026-06-03 | 2026-02-03 | 2025-11-06 | 2025-11-06 |
|---|---|---|---|---|---|---|
| 证券总股本 | 559.59 | 559.58 | 552.49 | 552.48 | 552.23 | 551.07 |
| 普通股本 | 559.59 | 559.58 | 552.49 | 552.48 | 552.23 | 551.07 |
| 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 | 2026-07-10 | 2026-06-30 | 2026-03-31 | 2025-12-31 | 2025-10-30 | 2025-09-30 |
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 |
|---|---|---|---|---|
| 2026-07-22 | 559.59 | 未披露 | 定期报告 | 2026-07-10 |
| 2026-08-10 | 559.58 | 未披露 |
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From March 31,2026 to June 30,2026
Vesting of restricted stock units
Tax withholding on vesting of net restricted stock units
|
2026-06-30 |
| 2026-06-03 | 552.49 | 未披露 |
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From March 31, 2025 to March 31, 2026
Vesting of restricted stock units
Tax withholding on restricted stock units
|
2026-03-31 |
| 2026-02-03 | 552.48 | 未披露 |
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From September 30, 2025 to December 31, 2025
Vesting of restricted stock units
|
2025-12-31 |
| 2025-11-06 | 552.23 | 未披露 | 定期报告 | 2025-10-30 |
| 2025-11-06 | 551.07 | 未披露 |
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From June 30, 2025 to September 30, 2025
Vesting of restricted stock units
|
2025-09-30 |
| 2025-08-05 | 550.15 | 未披露 |
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From March 31, 2025 to June 30, 2025
Vesting of restricted stock units
Tax withholding on vesting of restricted stock units
|
2025-06-30 |
| 2025-05-28 | 545.54 | 未披露 | 定期报告 | 2025-05-21 |
| 2025-05-28 | 545.54 | 未披露 |
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From March 31, 2024 to March 31, 2025
Vesting of restricted stock units and exercise of stock options
Tax withholding on restricted stock units
|
2025-03-31 |
| 2025-02-04 | 543.36 | 未披露 | 定期报告 | 2025-01-28 |
| 2025-02-04 | 543.36 | 未披露 |
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From September 30, 2024 to December 31, 2024
Vesting of restricted stock units and exercise of stock options
Tax withholding on vesting of restricted stock units
|
2024-12-31 |
| 2024-11-07 | 543.14 | 未披露 | 定期报告 | 2024-10-31 |
| 2024-11-07 | 541.99 | 未披露 |
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From June 30, 2024 to September 30, 2024
Exercise of stock options and vesting of restricted stock units
Tax withholding on vesting of restricted stock units
|
2024-09-30 |
| 2024-07-19 | 540.92 | 未披露 | 定期报告 | 2024-07-09 |
| 2024-08-05 | 540.92 | 未披露 |
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From March 31, 2024 to June 30, 2024
Exercise of stock options and vesting of restricted stock units
Tax withholding on vesting of restricted stock units
|
2024-06-30 |
| 2024-06-28 | 540.90 | 未披露 | 定期报告 | 2024-06-24 |
| 2024-06-28 | 539.45 | 未披露 |
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From March 31, 2023 to March 31, 2024
Exercise of stock options and vesting of restricted stock units
Tax withholding on restricted stock units
|
2024-03-31 |
| 2024-02-05 | 539.41 | 未披露 | 定期报告 | 2024-01-29 |
| 2024-02-05 | 539.40 | 未披露 |
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From September 30,2023 to December 31,2023
Exercise of stock options and vesting of restricted stock units
Tax withholding on vesting of restricted stock units
|
2023-12-31 |
| 2023-11-06 | 539.17 | 未披露 |
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From June 30, 2023 to September 30, 2023
Exercise of stock options and vesting of restricted stock units
Tax withholding on vesting of restricted stock units
|
2023-09-30 |
| 2023-08-03 | 538.43 | 未披露 | 定期报告 | 2023-07-27 |
| 2023-07-14 | 538.43 | 未披露 | 定期报告 | 2023-07-03 |
| 2023-07-14 | 537.00 | 未披露 | 定期报告 | 2023-06-16 |
| 2023-05-30 | 537.00 | 未披露 | 定期报告 | 2023-05-19 |
| 2023-05-30 | 536.95 | 未披露 |
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From December 31, 2022 to March 31, 2023
Exercise of stock options and vesting of restricted stock units
Tax withholding on restricted stock units
|
2023-03-31 |
| 2023-02-06 | 534.62 | 未披露 | 定期报告 | 2023-02-01 |
| 2023-02-06 | 534.19 | 未披露 |
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From September 30, 2022 to December 31, 2022
Exercise of stock options and vesting of restricted stock units
Tax withholding on vesting of restricted stock units
|
2022-12-31 |
| 2022-11-03 | 533.68 | 未披露 | 定期报告 | 2022-10-27 |
| 2022-11-03 | 533.63 | 未披露 |
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From June 30, 2022 to September 30, 2022
Exercise of stock options and vesting of restricted stock units
|
2022-09-30 |
| 2022-08-04 | 531.73 | 未披露 | 定期报告 | 2022-07-28 |
| 2022-07-14 | 529.70 | 未披露 | 定期报告 | 2022-07-01 |
| 2022-08-04 | 529.73 | 未披露 |
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From March 31, 2022 to June 30, 2022
Exercise of stock options and vesting of restricted stock units
Stock-based compensation expense
|
2022-06-30 |
| 2022-07-14 | 529.65 | 未披露 | 定期报告 | 2022-06-24 |
| 2022-05-31 | 526.79 | 未披露 | 定期报告 | 2022-05-25 |
| 2022-05-31 | 526.56 | 未披露 |
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From March 31, 2021 to March 31, 2022
Exercise of stock options and vesting of restricted stock units, net of shares withheld for taxes
Stock-based compensation expense
Cumulative adjustment due to adoption of ASU 2020-06
|
2022-03-31 |
| 2022-02-03 | 524.59 | 未披露 | 定期报告 | 2022-01-27 |
| 2022-02-03 | 524.46 | 未披露 |
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From September 30, 2021 to December 31, 2021
Exercise of stock options and vesting of restricted stock units
Stock-based compensation expense
|
2021-12-31 |
| 2021-11-04 | 522.52 | 未披露 | 定期报告 | 2021-10-29 |
| 2021-11-04 | 522.32 | 未披露 |
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From June 30, 2021 to September 30, 2021
Exercise of stock options and vesting of restricted stock units
Stock-based compensation expense
|
2021-09-30 |
| 2021-08-05 | 520.34 | 未披露 | 定期报告 | 2021-07-29 |
| 2021-08-05 | 519.89 | 未披露 |
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From March 31, 2021 to June 30, 2021
Exercise of stock options and vesting of restricted stock units
Dividends paid, $0.16 per share
|
2021-06-30 |
| 2021-06-01 | 514.10 | 未披露 | 定期报告 | 2021-05-26 |
| 2021-06-01 | 514.06 | 未披露 |
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From March 31, 2020 To March 31, 2021
Proceeds from the issuance of common stock, net of issuance costs of $9,315,000
Exercise of stock options and vesting of restricted stock units
Stock-based compensation expense
|
2021-03-31 |
| 2021-02-03 | 513.20 | 未披露 | 定期报告 | 2021-01-28 |
| 2021-02-03 | 513.10 | 未披露 |
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From September 30, 2020 to December 31, 2020
Exercise of stock options and vesting of restricted stock units
|
2020-12-31 |
| 2020-11-05 | 511.87 | 未披露 | 定期报告 | 2020-10-30 |
| 2020-11-05 | 511.74 | 未披露 |
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From June 30, 2020 to September 30, 2020
Exercise of stock options and vesting of restricted stock units
|
2020-09-30 |
| 2020-08-06 | 510.35 | 未披露 | 定期报告 | 2020-07-31 |
| 2020-08-06 | 510.29 | 未披露 |
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From March 31, 2020 to June 30, 2020
Proceeds from the issuance of common stock, net of issuance costs of $9,315
Exercise of stock options and vesting of restricted stock units
Stock-based compensation expense
|
2020-06-30 |
| 2020-07-17 | 510.30 | 未披露 | 定期报告 | 2020-06-29 |
| 2020-07-17 | 508.65 | 未披露 |
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including 600,000 shares issued in conjunction with an offering of our common stock on June 12, 2020 and 90,000 shares issued in conjunction with the full exercise of the underwriters' option to purchase additional shares on June 16, 2020
|
2020-06-16 |
| 2020-06-12 | 499.65 | 未披露 |
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1.Common stock we are offering 600,000 shares
2.The number of shares of common stock outstanding immediately after this offering that appears above is based on 4,396,536 shares of our common stock issued and outstanding as of May 31, 2020
|
2020-06-12 |
| 2020-06-08 | 439.65 | 未披露 | 定期报告 | 2020-05-31 |
| 2020-06-01 | 439.41 | 未披露 | 定期报告 | 2020-05-26 |
| 2020-06-01 | 438.71 | 未披露 |
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from March 31, 2019 to March 31, 2020
Proceeds from issuance of common stock, net of issuance costs of $5,568
Exercise of stock options and vesting of restricted stock units
|
2020-03-31 |
| 2020-02-10 | 437.05 | 未披露 |
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from September 30, 2019 to December 31, 2019
Exercise of stock options and vesting of restricted stock units
|
2019-12-31 |
| 2019-11-06 | 436.51 | 未披露 | 定期报告 | 2019-10-30 |
| 2019-11-06 | 436.50 | 未披露 |
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from June 30, 2019 to September 30, 2019
Exercise of stock options and vesting of restricted stock units
Proceeds from issuance of common stock, net of issuance costs of $5,568
|
2019-09-30 |
| 2019-09-25 | 435.83 | 未披露 | 定期报告 | 2019-09-13 |
| 2019-08-12 | 435.28 | 未披露 | 定期报告 | 2019-08-12 |
| 2019-08-06 | 392.40 | 未披露 | 定期报告 | 2019-08-05 |
| 2019-07-30 | 392.16 | 未披露 | 定期报告 | 2019-07-24 |
| 2019-07-30 | 392.16 | 未披露 |
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from March 31, 2019 to June 30,2019
Common stock issued for conversion of stock options net of 481 shares returned as payment
|
2019-06-30 |
| 2019-06-03 | 390.11 | 未披露 | 定期报告 | 2019-05-28 |
| 2019-06-03 | 389.01 | 未披露 |
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from March 31, 2018 to March 31, 2019
Common stock issued for conversion of stock options net of 4,853 shares returned as payment
|
2019-03-31 |
| 2019-02-04 | 386.85 | 未披露 | 定期报告 | 2019-01-25 |
| 2019-02-04 | 385.93 | 未披露 |
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From September 30, 2018 to December 31, 2018
Common stock issued to employees under compensation plans, net of 485 shares returned as payment
|
2018-12-31 |
| 2018-10-31 | 385.28 | 未披露 | 定期报告 | 2018-10-26 |
| 2018-10-31 | 385.27 | 未披露 | 定期报告 | 2018-09-30 |
| 2018-09-20 | 385.08 | 未披露 | 定期报告 | 2018-09-10 |
| 2018-07-31 | 384.82 | 未披露 | 定期报告 | 2018-07-27 |
| 2018-07-31 | 384.80 | 未披露 | 定期报告 | 2018-06-30 |
| 2018-06-05 | 380.84 | 未披露 | 定期报告 | 2018-05-31 |
| 2018-06-05 | 380.14 | 未披露 |
更多>>
From March 31, 2017 to March 31, 2018
Common stock issued for conversion of stock options net of 8,562 shares returned as payment
|
2018-03-31 |
| 2018-02-06 | 378.32 | 未披露 | 定期报告 | 2018-01-26 |
| 2018-02-06 | 378.18 | 未披露 | 定期报告 | 2017-12-31 |
| 2017-11-06 | 377.97 | 未披露 | 定期报告 | 2017-10-27 |
| 2017-11-06 | 377.97 | 未披露 | 定期报告 | 2017-09-30 |
| 2017-09-20 | 376.51 | 未披露 | 定期报告 | 2017-09-14 |
| 2017-08-01 | 375.89 | 未披露 | 定期报告 | 2017-07-25 |
| 2017-08-01 | 375.82 | 未披露 | 定期报告 | 2017-06-30 |
| 2017-06-07 | 373.74 | 未披露 | 定期报告 | 2017-05-31 |
| 2017-06-07 | 372.77 | 未披露 |
更多>>
from March 31, 2016 to March 31, 2017
Common stock issued for conversion of stock options net of 13,964 shares returned as payment
|
2017-03-31 |
| 2017-02-06 | 370.07 | 未披露 | 定期报告 | 2017-01-27 |
| 2017-02-06 | 369.84 | 未披露 | 定期报告 | 2016-12-31 |
| 2016-11-07 | 367.95 | 未披露 | 定期报告 | 2016-09-30 |
| 2016-08-12 | 366.80 | 未披露 | 定期报告 | 2016-08-01 |
| 2016-08-01 | 366.54 | 未披露 | 定期报告 | 2016-06-30 |
| 2016-06-06 | 363.87 | 未披露 | 定期报告 | 2016-05-27 |
| 2016-06-06 | 363.73 | 未披露 |
更多>>
from March 31, 2015 to March 31, 2016
Common stock issued for conversion of stock options net of 13,491 shares returned as payment
|
2016-03-31 |
| 2016-02-04 | 362.65 | 未披露 | 定期报告 | 2016-01-27 |
| 2016-02-04 | 362.50 | 未披露 | 定期报告 | 2015-12-31 |
| 2015-11-04 | 360.37 | 未披露 | 定期报告 | 2015-10-31 |
| 2015-11-04 | 360.23 | 未披露 | 定期报告 | 2015-09-30 |
| 2015-08-07 | 359.42 | 未披露 | 定期报告 | 2015-07-31 |
| 2015-08-04 | 359.33 | 未披露 | 定期报告 | 2015-07-27 |
| 2015-08-04 | 359.14 | 未披露 | 定期报告 | 2015-06-30 |
| 2015-06-03 | 357.67 | 未披露 | 定期报告 | 2015-05-31 |
| 2015-06-03 | 356.15 | 未披露 |
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from March 31, 2014 to March 31, 2015
Common stock issued for conversion of stock options net of 11,266 shares returned as payment
|
2015-03-31 |
| 2015-02-02 | 353.55 | 未披露 | 定期报告 | 2015-01-27 |
| 2015-02-02 | 353.53 | 未披露 | 定期报告 | 2014-12-31 |
| 2014-11-06 | 353.09 | 未披露 | 定期报告 | 2014-10-28 |
| 2014-11-06 | 352.43 | 未披露 | 定期报告 | 2014-09-30 |
| 2014-08-22 | 350.93 | 未披露 | 定期报告 | 2014-08-15 |
| 2014-08-06 | 350.54 | 未披露 | 定期报告 | 2014-07-31 |
| 2014-08-06 | 350.47 | 未披露 | 定期报告 | 2014-06-30 |
| 2014-06-04 | 350.24 | 未披露 | 定期报告 | 2014-05-28 |
| 2014-06-04 | 349.06 | 未披露 |
更多>>
from March 31, 2013 to March 31, 2014
Common stock issued for conversion of stock options net of 13,021 shares returned as payment
Purchase and retirement of common stock
|
2014-03-31 |
| 2014-02-05 | 344.70 | 未披露 | 定期报告 | 2014-01-29 |
| 2014-02-05 | 344.64 | 未披露 | 定期报告 | 2013-12-31 |
| 2013-11-05 | 342.62 | 未披露 | 定期报告 | 2013-10-29 |
| 2013-11-05 | 342.50 | 未披露 | 定期报告 | 2013-09-30 |
| 2013-08-23 | 340.48 | 未披露 | 定期报告 | 2013-08-13 |
| 2013-08-07 | 339.99 | 未披露 | 定期报告 | 2013-07-31 |
| 2013-08-07 | 339.66 | 未披露 | 定期报告 | 2013-06-30 |
| 2013-06-06 | 339.58 | 未披露 | 定期报告 | 2013-05-31 |
| 2013-06-06 | 338.85 | 未披露 |
更多>>
From March 31, 2012 to March 31, 2013
Common stock issued for conversion of stock options net of 15,572 shares returned as payment
Purchase and retirement of common stock
|
2013-03-31 |
| 2013-02-08 | 337.95 | 未披露 | 定期报告 | 2013-01-31 |
| 2013-02-08 | 337.08 | 未披露 | 定期报告 | 2012-12-31 |
| 2012-11-13 | 335.68 | 未披露 | 定期报告 | 2012-10-31 |
| 2012-11-13 | 335.63 | 未披露 | 定期报告 | 2012-09-30 |
| 2012-08-10 | 334.61 | 未披露 | 定期报告 | 2012-07-31 |
| 2012-07-27 | 334.59 | 未披露 | 定期报告 | 2012-07-25 |
| 2012-08-10 | 334.32 | 未披露 | 定期报告 | 2012-06-30 |
| 2012-06-29 | 334.37 | 未披露 | 定期报告 | 2012-05-31 |
| 2012-06-29 | 332.20 | 未披露 |
更多>>
from March 31, 2011 to March 31, 2012
Common stock issued for conversion of stock options net of 12,634 shares returned as payment
Purchase and retirement of common stock
|
2012-03-31 |
| 2012-02-10 | 329.11 | 未披露 | 定期报告 | 2012-01-31 |
| 2012-02-10 | 328.75 | 未披露 | 定期报告 | 2011-12-31 |
| 2011-11-14 | 328.29 | 未披露 | 定期报告 | 2011-10-31 |
| 2011-11-14 | 328.25 | 未披露 | 定期报告 | 2011-09-30 |
| 2011-08-15 | 328.18 | 未披露 | 定期报告 | 2011-07-31 |
| 2011-08-15 | 328.10 | 未披露 | 定期报告 | 2011-06-30 |
| 2011-06-29 | 328.12 | 未披露 | 定期报告 | 2011-05-31 |
| 2011-06-29 | 325.07 | 未披露 |
更多>>
from March 31 2010 to March 31 2011
Common stock issued for conversion of stock options net of 12,446 shares returned to Company as payment
Purchase and retirement of treasury stock
|
2011-03-31 |
| 2011-02-14 | 324.70 | 未披露 | 定期报告 | 2011-01-31 |
| 2011-02-14 | 324.63 | 未披露 | 定期报告 | 2010-12-31 |
| 2010-11-15 | 323.14 | 未披露 | 定期报告 | 2010-09-30 |
| 2010-08-16 | 323.14 | 未披露 | 定期报告 | 2010-07-31 |
| 2010-08-16 | 323.17 | 未披露 | 定期报告 | 2010-06-30 |
| 2010-06-29 | 321.02 | 未披露 | 定期报告 | 2010-05-31 |
| 2010-06-29 | 320.37 | 未披露 |
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from March 31 2009 to March 31 2010
Common stock issued for conversion of stock options net of 25,619 shares returned to Company as payment
Purchase and retirement of treasury stock
|
2010-03-31 |
| 2010-02-16 | 320.10 | 未披露 | 定期报告 | 2010-01-31 |
| 2010-02-16 | 319.54 | 未披露 | 定期报告 | 2009-12-31 |
| 2009-06-29 | 318.70 | 未披露 | 定期报告 | 2009-05-31 |
| 2009-06-29 | 318.22 | 未披露 |
更多>>
from March 31,2008 to March 31,2009
Common stock issued for the conversion of incentive stock options net of 5,682 shares returned to Company as payment
Purchase and retirement of treasury stock
|
2009-03-31 |
| 2008-06-30 | 317.13 | 未披露 | 定期报告 | 2008-05-31 |
| 2008-06-30 | 316.65 | 未披露 |
更多>>
from March 31,2007 to March 31,2008
Common stock issued for the conversion of incentive stock options net of 9,676 shares returned to Company as payment
Purchase and retirement of treasury stock
|
2008-03-31 |
| 2007-06-29 | 316.75 | 未披露 | 定期报告 | 2007-05-31 |
| 2007-06-29 | 317.84 | 未披露 |
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from March 31,2006 to March 31,2007
Common stock issued for the conversion of incentive stock options net of 10,329 shares returned to Company as payment
Purchase and retirement of treasury stock
Purchase of subsidiary company
|
2007-03-31 |
| 2006-06-28 | 317.51 | 未披露 | 定期报告 | 2006-05-31 |
| 2006-06-28 | 294.53 | 未披露 |
更多>>
from March 31,2005 to March 31,2006
Common stock issued for the conversion of incentive stock options net of 21,048 shares returned to Company as payment
Purchase and retirement of treasury stock
|
2006-03-31 |
| 2005-06-21 | 303.75 | 未披露 | 定期报告 | 2005-05-12 |
| 2005-06-21 | 303.88 | 未披露 |
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from March 31,2004 to March 31,2005
Common stock issued for the conversion of incentive stock options net of 31,534 shares returned to Company as payment
Purchase and retirement of treasury stock
|
2005-03-31 |
| 2004-06-29 | 306.82 | 未披露 | 定期报告 | 2004-05-31 |
| 2004-06-29 | 307.28 | 未披露 |
更多>>
from March 31,2003 to March 31,2004
Common stock issued for the conversion of incentive stock options net of 38,582 shares returned to company as payment
Purchase and retirement of treasury stock
|
2004-03-31 |
| 2003-06-30 | 307.74 | 未披露 | 定期报告 | 2003-05-31 |
| 2003-06-30 | 309.89 | 未披露 |
更多>>
from March 31,2002 to March 31,2003
Common stock issued for the conversion of incentive stock options net of 29,704 shares returned to company as payment
Purchase and retirement of treasury stock
|
2003-03-31 |
| 2002-07-01 | 332.35 | 未披露 | 定期报告 | 2002-05-31 |
| 2002-07-01 | 334.24 | 未披露 |
更多>>
from March 31,2001 to March 31,2002
Common stock issued for the conversion of incentive stock options net of 34,461 shares returned to company as payment
Purchase and retirement of treasury stock
|
2002-03-31 |
| 2001-06-29 | 349.36 | 未披露 | 定期报告 | 2001-06-01 |
| 2001-06-29 | 354.22 | 未披露 |
更多>>
from March 31,2000 to March 31,2001
Common stock issued for the conversion of incentive stock options net of shares returned to company as payment
Purchase and retirement of treasury stock
|
2001-03-31 |
| 2000-07-05 | 378.75 | 未披露 |
更多>>
from March 31,1999 to March 31,2000
Common stock issued for the conversion of incentive stock options net of shares returned to company as payment
Purchase and retirement of treasury stock
Common stock issued for Acquisition of Automata Instrumentation, Inc.
|
2000-03-31 |
| 1999-06-30 | 403.52 | 未披露 |
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from March 31,1998 to March 31,1999
Common stock issued for the conversion of incentive stock options net of shares returned to company as payment
Purchase and retirement of treasury stock
|
1999-03-31 |
| 1998-06-26 | 428.46 | 未披露 |
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from March 31,1997 to March 31,1998
Common stock issued for the conversion of incentive stock options net of shares returned to company as payment
Purchase and retirement of treasury stock
|
1998-03-31 |
| 1997-06-30 | 431.62 | 未披露 |
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from March 31,1996 to March 31,1997
Common stock issued for the conversion of incentive stock options net of shares returned to company as payment
Purchase and retirement of treasury stock
|
1997-03-31 |
| 1996-06-28 | 431.42 | 未披露 |
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from March 31,1995 to March 31,1996
Common stock issued for the conversion of incentive stock options net of shares returned to company as payment
Purchase and retirement of treasury stock
|
1996-03-31 |
| 1996-06-28 | 423.38 | 未披露 |
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from March 31,1994 to March 31,1995
Common stock issued for the conversion of incentive stock options net of shares returned to company as payment
Shares repurchased by company
|
1995-03-31 |
From March 31,2026 to June 30,2026
Vesting of restricted stock units
Tax withholding on vesting of net restricted stock units
From March 31, 2025 to March 31, 2026
Vesting of restricted stock units
Tax withholding on restricted stock units
From September 30, 2025 to December 31, 2025
Vesting of restricted stock units
From June 30, 2025 to September 30, 2025
Vesting of restricted stock units
From March 31, 2025 to June 30, 2025
Vesting of restricted stock units
Tax withholding on vesting of restricted stock units
From March 31, 2024 to March 31, 2025
Vesting of restricted stock units and exercise of stock options
Tax withholding on restricted stock units
From September 30, 2024 to December 31, 2024
Vesting of restricted stock units and exercise of stock options
Tax withholding on vesting of restricted stock units
From June 30, 2024 to September 30, 2024
Exercise of stock options and vesting of restricted stock units
Tax withholding on vesting of restricted stock units
From March 31, 2024 to June 30, 2024
Exercise of stock options and vesting of restricted stock units
Tax withholding on vesting of restricted stock units
From March 31, 2023 to March 31, 2024
Exercise of stock options and vesting of restricted stock units
Tax withholding on restricted stock units
From September 30,2023 to December 31,2023
Exercise of stock options and vesting of restricted stock units
Tax withholding on vesting of restricted stock units
From June 30, 2023 to September 30, 2023
Exercise of stock options and vesting of restricted stock units
Tax withholding on vesting of restricted stock units
From December 31, 2022 to March 31, 2023
Exercise of stock options and vesting of restricted stock units
Tax withholding on restricted stock units
From September 30, 2022 to December 31, 2022
Exercise of stock options and vesting of restricted stock units
Tax withholding on vesting of restricted stock units
From June 30, 2022 to September 30, 2022
Exercise of stock options and vesting of restricted stock units
From March 31, 2022 to June 30, 2022
Exercise of stock options and vesting of restricted stock units
Stock-based compensation expense
From March 31, 2021 to March 31, 2022
Exercise of stock options and vesting of restricted stock units, net of shares withheld for taxes
Stock-based compensation expense
Cumulative adjustment due to adoption of ASU 2020-06
From September 30, 2021 to December 31, 2021
Exercise of stock options and vesting of restricted stock units
Stock-based compensation expense
From June 30, 2021 to September 30, 2021
Exercise of stock options and vesting of restricted stock units
Stock-based compensation expense
From March 31, 2021 to June 30, 2021
Exercise of stock options and vesting of restricted stock units
Dividends paid, $0.16 per share
From March 31, 2020 To March 31, 2021
Proceeds from the issuance of common stock, net of issuance costs of $9,315,000
Exercise of stock options and vesting of restricted stock units
Stock-based compensation expense
From September 30, 2020 to December 31, 2020
Exercise of stock options and vesting of restricted stock units
From June 30, 2020 to September 30, 2020
Exercise of stock options and vesting of restricted stock units
From March 31, 2020 to June 30, 2020
Proceeds from the issuance of common stock, net of issuance costs of $9,315
Exercise of stock options and vesting of restricted stock units
Stock-based compensation expense
including 600,000 shares issued in conjunction with an offering of our common stock on June 12, 2020 and 90,000 shares issued in conjunction with the full exercise of the underwriters' option to purchase additional shares on June 16, 2020
1.Common stock we are offering 600,000 shares
2.The number of shares of common stock outstanding immediately after this offering that appears above is based on 4,396,536 shares of our common stock issued and outstanding as of May 31, 2020
from March 31, 2019 to March 31, 2020
Proceeds from issuance of common stock, net of issuance costs of $5,568
Exercise of stock options and vesting of restricted stock units
from September 30, 2019 to December 31, 2019
Exercise of stock options and vesting of restricted stock units
from June 30, 2019 to September 30, 2019
Exercise of stock options and vesting of restricted stock units
Proceeds from issuance of common stock, net of issuance costs of $5,568
from March 31, 2019 to June 30,2019
Common stock issued for conversion of stock options net of 481 shares returned as payment
from March 31, 2018 to March 31, 2019
Common stock issued for conversion of stock options net of 4,853 shares returned as payment
From September 30, 2018 to December 31, 2018
Common stock issued to employees under compensation plans, net of 485 shares returned as payment
From March 31, 2017 to March 31, 2018
Common stock issued for conversion of stock options net of 8,562 shares returned as payment
from March 31, 2016 to March 31, 2017
Common stock issued for conversion of stock options net of 13,964 shares returned as payment
from March 31, 2015 to March 31, 2016
Common stock issued for conversion of stock options net of 13,491 shares returned as payment
from March 31, 2014 to March 31, 2015
Common stock issued for conversion of stock options net of 11,266 shares returned as payment
from March 31, 2013 to March 31, 2014
Common stock issued for conversion of stock options net of 13,021 shares returned as payment
Purchase and retirement of common stock
From March 31, 2012 to March 31, 2013
Common stock issued for conversion of stock options net of 15,572 shares returned as payment
Purchase and retirement of common stock
from March 31, 2011 to March 31, 2012
Common stock issued for conversion of stock options net of 12,634 shares returned as payment
Purchase and retirement of common stock
from March 31 2010 to March 31 2011
Common stock issued for conversion of stock options net of 12,446 shares returned to Company as payment
Purchase and retirement of treasury stock
from March 31 2009 to March 31 2010
Common stock issued for conversion of stock options net of 25,619 shares returned to Company as payment
Purchase and retirement of treasury stock
from March 31,2008 to March 31,2009
Common stock issued for the conversion of incentive stock options net of 5,682 shares returned to Company as payment
Purchase and retirement of treasury stock
from March 31,2007 to March 31,2008
Common stock issued for the conversion of incentive stock options net of 9,676 shares returned to Company as payment
Purchase and retirement of treasury stock
from March 31,2006 to March 31,2007
Common stock issued for the conversion of incentive stock options net of 10,329 shares returned to Company as payment
Purchase and retirement of treasury stock
Purchase of subsidiary company
from March 31,2005 to March 31,2006
Common stock issued for the conversion of incentive stock options net of 21,048 shares returned to Company as payment
Purchase and retirement of treasury stock
from March 31,2004 to March 31,2005
Common stock issued for the conversion of incentive stock options net of 31,534 shares returned to Company as payment
Purchase and retirement of treasury stock
from March 31,2003 to March 31,2004
Common stock issued for the conversion of incentive stock options net of 38,582 shares returned to company as payment
Purchase and retirement of treasury stock
from March 31,2002 to March 31,2003
Common stock issued for the conversion of incentive stock options net of 29,704 shares returned to company as payment
Purchase and retirement of treasury stock
from March 31,2001 to March 31,2002
Common stock issued for the conversion of incentive stock options net of 34,461 shares returned to company as payment
Purchase and retirement of treasury stock
from March 31,2000 to March 31,2001
Common stock issued for the conversion of incentive stock options net of shares returned to company as payment
Purchase and retirement of treasury stock
from March 31,1999 to March 31,2000
Common stock issued for the conversion of incentive stock options net of shares returned to company as payment
Purchase and retirement of treasury stock
Common stock issued for Acquisition of Automata Instrumentation, Inc.
from March 31,1998 to March 31,1999
Common stock issued for the conversion of incentive stock options net of shares returned to company as payment
Purchase and retirement of treasury stock
from March 31,1997 to March 31,1998
Common stock issued for the conversion of incentive stock options net of shares returned to company as payment
Purchase and retirement of treasury stock
from March 31,1996 to March 31,1997
Common stock issued for the conversion of incentive stock options net of shares returned to company as payment
Purchase and retirement of treasury stock
from March 31,1995 to March 31,1996
Common stock issued for the conversion of incentive stock options net of shares returned to company as payment
Purchase and retirement of treasury stock
from March 31,1994 to March 31,1995
Common stock issued for the conversion of incentive stock options net of shares returned to company as payment
Shares repurchased by company