股本结构
单位：万股
| 公告日期 | 2025-11-05 | 2025-11-05 | 2025-08-06 | 2025-08-06 | 2025-05-08 | 2025-05-08 |
|---|---|---|---|---|---|---|
| 证券总股本 | 5029.10 | 5025.32 | 5081.47 | 5075.87 | 5157.89 | 5231.01 |
| 普通股本 | 5029.10 | 5025.32 | 5081.47 | 5075.87 | 5157.89 | 5231.01 |
| 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 | 2025-10-31 | 2025-09-30 | 2025-08-01 | 2025-06-30 | 2025-05-01 | 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 |
|---|---|---|---|---|
| 2025-11-05 | 5029.10 | 未披露 | 定期报告 | 2025-10-31 |
| 2025-11-05 | 5025.32 | 未披露 |
更多>>
From June 30, 2025 to September 30, 2025
Stock-based compensation
Purchase of common stock for retirement
|
2025-09-30 |
| 2025-08-06 | 5081.47 | 未披露 | 定期报告 | 2025-08-01 |
| 2025-08-06 | 5075.87 | 未披露 |
更多>>
From March 31, 2025 to June 30, 2025
Issuance of common stock for employee stock purchase plan
Stock-based compensation
Purchase of common stock for retirement
|
2025-06-30 |
| 2025-05-08 | 5157.89 | 未披露 | 定期报告 | 2025-05-01 |
| 2025-05-08 | 5231.01 | 未披露 |
更多>>
From December 31, 2024 to March 31, 2025
Stock-based compensation
Purchase of common stock for retirement
|
2025-03-31 |
| 2025-03-21 | 5435.09 | 未披露 | 定期报告 | 2025-03-05 |
| 2025-02-28 | 5474.79 | 未披露 | 定期报告 | 2025-02-21 |
| 2025-02-28 | 5526.54 | 未披露 |
更多>>
From December 31, 2023 to December 31, 2024
Issuance of common stock for employee stock purchase plan
Purchase of common stock for retirement
Stock-based compensation
Exercise of stock options
|
2024-12-31 |
| 2024-11-07 | 5595.21 | 未披露 | 定期报告 | 2024-10-31 |
| 2024-11-07 | 5598.73 | 未披露 |
更多>>
From June 30, 2024 to September 30, 2024
Purchase of common stock for retirement
Stock-based compensation
|
2024-09-30 |
| 2024-08-08 | 5633.09 | 未披露 | 定期报告 | 2024-08-02 |
| 2024-08-08 | 5690.88 | 未披露 |
更多>>
From March 31, 2024 to June 30, 2024
Issuance of common stock for employee stock purchase plan
Stock-based compensation
Purchase of common stock for retirement
|
2024-06-30 |
| 2024-05-08 | 5793.79 | 未披露 | 定期报告 | 2024-05-06 |
| 2024-05-08 | 5907.05 | 未披露 |
更多>>
From December 31, 2023 to March 31, 2024
Purchase of common stock for retirement
Stock-based compensation
|
2024-03-31 |
| 2024-03-18 | 5934.06 | 未披露 | 定期报告 | 2024-03-06 |
| 2024-02-29 | 5957.55 | 未披露 | 定期报告 | 2024-02-22 |
| 2024-02-29 | 5975.58 | 未披露 |
更多>>
From December 31, 2022 to December 31, 2023
Issuance of common stock for employee stock purchase plan
Stock-based compensation
Purchase of common stock for retirement
Exercise of stock options
|
2023-12-31 |
| 2023-11-08 | 6049.97 | 未披露 | 定期报告 | 2023-11-01 |
| 2023-11-08 | 6051.84 | 未披露 |
更多>>
From June 30, 2023 to September 30, 2023
Purchase of common stock for retirement
Stock-based compensation
Exercise of stock options
|
2023-09-30 |
| 2023-08-09 | 6106.70 | 未披露 | 定期报告 | 2023-08-04 |
| 2023-08-09 | 6104.35 | 未披露 |
更多>>
From March 31, 2023 to June 30, 2023
Stock-based compensation
Purchase of common stock for retirement
Issuance of common stock for employee stock purchase plan
|
2023-06-30 |
| 2023-05-05 | 6103.85 | 未披露 | 定期报告 | 2023-05-01 |
| 2023-05-05 | 6102.94 | 未披露 |
更多>>
From December 31, 2022 to March 31, 2023
Purchase of common stock for retirement
Stock-based compensation
Exercise of stock options
|
2023-03-31 |
| 2023-03-23 | 6071.59 | 未披露 | 定期报告 | 2023-03-10 |
| 2023-02-27 | 6066.82 | 未披露 | 定期报告 | 2023-02-21 |
| 2023-02-27 | 6047.08 | 未披露 |
更多>>
From December 31, 2021 to December 31, 2022
Issuance of common stock for employee stock purchase plan
Purchase of common stock for retirement
Stock-based compensation
Exercise of stock options
|
2022-12-31 |
| 2022-11-03 | 6031.77 | 未披露 | 定期报告 | 2022-10-28 |
| 2022-11-03 | 6015.76 | 未披露 |
更多>>
From June 30, 2022 to September 30, 2022
Stock-based compensation
Purchase of common stock for retirement
|
2022-09-30 |
| 2022-08-09 | 6017.87 | 未披露 | 定期报告 | 2022-08-03 |
| 2022-08-09 | 6021.99 | 未披露 |
更多>>
From March 31, 2022 to June 30, 2022
Issuance of common stock for employee stock purchase plan
Stock-based compensation
|
2022-06-30 |
| 2022-05-06 | 6012.03 | 未披露 | 定期报告 | 2022-04-29 |
| 2022-05-06 | 6011.16 | 未披露 |
更多>>
From December 31, 2021 to March 31, 2022
Stock-based compensation
Purchase of common stock for retirement
|
2022-03-31 |
| 2022-03-24 | 6015.82 | 未披露 | 定期报告 | 2022-03-11 |
| 2022-02-25 | 5981.37 | 未披露 | 定期报告 | 2022-02-18 |
| 2022-02-25 | 6016.20 | 未披露 |
更多>>
From December 31, 2020 to December 31, 2021
Common stock offering, net of issuance costs
Issuance of common stock for employee stock purchase plan
Stock-based compensation
Purchase of common stock for retirement
Exercise of stock options
|
2021-12-31 |
| 2021-11-04 | 6019.11 | 未披露 | 定期报告 | 2021-10-28 |
| 2021-11-04 | 6019.25 | 未披露 |
更多>>
From June 30, 2021 to September 30, 2021
Stock-based compensation
Purchase of common stock for retirement
|
2021-09-30 |
| 2021-08-05 | 6022.78 | 未披露 | 定期报告 | 2021-07-29 |
| 2021-08-05 | 6018.47 | 未披露 |
更多>>
From March 31, 2021 to June 30, 2021
Issuance of common stock for employee stock purchase plan
Stock-based compensation
|
2021-06-30 |
| 2021-05-07 | 6018.38 | 未披露 | 定期报告 | 2021-04-30 |
| 2021-05-07 | 6014.18 | 未披露 |
更多>>
From December 31, 2020 to March 31, 2021
Common stock offering, net of issuance costs
Stock-based compensation
Purchase of common stock for retirement
Exercise of stock options
|
2021-03-31 |
| 2021-03-25 | 5975.93 | 未披露 | 定期报告 | 2021-03-19 |
| 2021-03-25 | 5400.93 | 未披露 | 定期报告 | 2021-03-18 |
| 2021-03-08 | 5400.85 | 未披露 | 定期报告 | 2021-03-01 |
| 2021-03-08 | 5400.25 | 未披露 |
更多>>
From December 31, 2019 to December 31, 2020
Issuance of common stock for employee stock purchase plan
Exercise of common stock warrants
Stock-based compensation
Purchase of common stock for retirement
|
2020-12-31 |
| 2020-11-06 | 5397.78 | 未披露 | 定期报告 | 2020-11-02 |
| 2020-11-06 | 5394.74 | 未披露 |
更多>>
From June 30, 2020 to September 30, 2020
Stock-based compensation
Purchase of common stock for retirement
|
2020-09-30 |
| 2020-08-10 | 5396.52 | 未披露 | 定期报告 | 2020-08-04 |
| 2020-08-10 | 5394.20 | 未披露 |
更多>>
From March 31, 2020 to June 30, 2020
Issuance of common stock for employee stock purchase plan
Stock-based compensation
|
2020-06-30 |
| 2020-05-11 | 5386.30 | 未披露 | 定期报告 | 2020-05-04 |
| 2020-05-11 | 5383.73 | 未披露 |
更多>>
From December 31, 2019 to March 31, 2020
Exercise of common stock warrants
Stock-based compensation
Purchase of common stock for retirement
|
2020-03-31 |
| 2020-03-26 | 5359.96 | 未披露 | 定期报告 | 2020-03-20 |
| 2020-03-02 | 5337.55 | 未披露 | 定期报告 | 2020-02-18 |
| 2020-03-02 | 5325.42 | 未披露 |
更多>>
From December 31, 2018 to December 31, 2019
Issuance of common stock in connection with acquisition
Issuance of common stock for convertible notes repurchase, net
Issuance of common stock for employee stock purchase plan
Stock-based compensation
Purchase of common stock for retirement
Exercise of stock options
|
2019-12-31 |
| 2019-11-06 | 5118.21 | 未披露 | 定期报告 | 2019-11-01 |
| 2019-11-06 | 5116.81 | 未披露 |
更多>>
from June 30, 2019 to September 30, 2019
Stock-based compensation
Purchase of common stock for retirement
Exercise of stock options
|
2019-09-30 |
| 2019-08-08 | 5100.88 | 未披露 | 定期报告 | 2019-08-02 |
| 2019-08-08 | 5102.42 | 未披露 |
更多>>
From March 31, 2019 to June 30, 2019
Issuance of common stock for convertible notes repurchase, net
Issuance of common stock for employee stock purchase plan
Stock-based compensation
Purchase of common stock for retirement
Exercise of stock options
|
2019-06-30 |
| 2019-05-10 | 4955.03 | 未披露 |
更多>>
from December 31, 2018 to March 31, 2019
Issuance of common stock
Stock-based compensation
Purchase of common stock for retirement
|
2019-03-31 |
| 2019-03-28 | 4929.06 | 未披露 | 定期报告 | 2019-03-22 |
| 2019-03-11 | 4953.99 | 未披露 | 定期报告 | 2019-03-04 |
| 2019-03-11 | 4698.39 | 未披露 |
更多>>
from December 31, 2017 to December 31, 2018
Issuance of common stock in connection with acquisition
Stock-based compensation
Purchase of common stock for retirement
|
2018-12-31 |
| 2018-12-21 | 4587.57 | 未披露 | 定期报告 | 2018-12-01 |
| 2018-11-07 | 4587.69 | 未披露 | 定期报告 | 2018-11-02 |
| 2018-08-08 | 4588.09 | 未披露 | 定期报告 | 2018-08-03 |
| 2018-08-08 | 4600.77 | 未披露 | 定期报告 | 2018-06-30 |
| 2018-05-10 | 4588.19 | 未披露 | 定期报告 | 2018-05-04 |
| 2018-05-10 | 4601.85 | 未披露 | 定期报告 | 2018-03-31 |
| 2018-03-29 | 4567.48 | 未披露 | 定期报告 | 2018-03-23 |
| 2018-03-12 | 4632.72 | 未披露 | 定期报告 | 2018-03-07 |
| 2018-03-12 | 4577.61 | 未披露 |
更多>>
from December 31, 2016 to December 31, 2017
Stock-based compensation
Purchase of common stock for retirement
|
2017-12-31 |
| 2017-11-08 | 4579.04 | 未披露 | 定期报告 | 2017-11-06 |
| 2017-11-08 | 4577.88 | 未披露 | 定期报告 | 2017-09-30 |
| 2017-08-09 | 4580.28 | 未披露 | 定期报告 | 2017-08-03 |
| 2017-08-09 | 4578.83 | 未披露 | 定期报告 | 2017-06-30 |
| 2017-05-10 | 4579.06 | 未披露 | 定期报告 | 2017-05-05 |
| 2017-05-10 | 4576.36 | 未披露 | 定期报告 | 2017-03-31 |
| 2017-04-06 | 4580.11 | 未披露 | 定期报告 | 2017-03-29 |
| 2017-03-07 | 4553.83 | 未披露 | 定期报告 | 2017-02-24 |
| 2017-03-07 | 4553.39 | 未披露 |
更多>>
from December 31, 2015 to December 31, 2016
Issuance of common stock, net of offering costs of $1.0 million
Stock-based compensation
Conversion of Bridge Notes
Purchase of common stock for retirement
|
2016-12-31 |
| 2016-11-04 | 4550.62 | 未披露 | 定期报告 | 2016-10-28 |
| 2016-11-04 | 4550.90 | 未披露 | 定期报告 | 2016-09-30 |
| 2016-08-09 | 4117.86 | 未披露 | 定期报告 | 2016-08-03 |
| 2016-07-22 | 4110.74 | 未披露 | 定期报告 | 2016-07-20 |
| 2016-08-09 | 4110.00 | 未披露 | 定期报告 | 2016-06-30 |
| 2016-06-17 | 4110.13 | 未披露 | 定期报告 | 2016-06-14 |
| 2016-05-05 | 4110.59 | 未披露 | 定期报告 | 2016-04-29 |
| 2016-04-21 | 4067.00 | 未披露 | 定期报告 | 2016-04-06 |
| 2016-05-05 | 4110.61 | 未披露 | 定期报告 | 2016-03-31 |
| 2016-03-03 | 4107.81 | 未披露 | 定期报告 | 2016-02-26 |
| 2016-03-03 | 4100.99 | 未披露 |
更多>>
from December 31, 2014 to December 31, 2015
Issuance of common stock, net of offering costs of $1.0 million
Exercise of common stock warrants
Stock-based compensation
Purchase of common stock for retirement
|
2015-12-31 |
| 2015-11-05 | 3753.09 | 未披露 | 定期报告 | 2015-10-29 |
| 2015-11-05 | 3752.46 | 未披露 | 定期报告 | 2015-09-30 |
| 2015-08-07 | 3710.95 | 未披露 | 定期报告 | 2015-08-03 |
| 2015-08-07 | 3710.26 | 未披露 | 定期报告 | 2015-06-30 |
| 2015-06-01 | 3715.17 | 未披露 | 定期报告 | 2015-05-05 |
| 2015-05-11 | 3713.55 | 未披露 | 定期报告 | 2015-03-31 |
| 2015-03-12 | 3709.39 | 未披露 | 定期报告 | 2015-03-09 |
| 2015-03-12 | 3706.89 | 未披露 |
更多>>
from December 31, 2013 to December 31, 2014
Issuance of common stock, net of offering costs of $237 thousand
Bankruptcy claim settlements
Exercise of common stock warrants
Share-based compensation
|
2014-12-31 |
| 2014-11-12 | 3680.04 | 未披露 | 定期报告 | 2014-11-06 |
| 2014-11-12 | 3664.52 | 未披露 | 定期报告 | 2014-09-30 |
| 2014-08-11 | 3031.05 | 未披露 | 定期报告 | 2014-08-04 |
| 2014-08-11 | 3028.87 | 未披露 | 定期报告 | 2014-06-30 |
| 2014-06-02 | 3018.53 | 未披露 | 定期报告 | 2014-05-27 |
| 2014-06-02 | 3015.60 | 未披露 | 定期报告 | 2014-03-31 |
| 2014-03-31 | 3015.90 | 未披露 | 定期报告 | 2014-03-26 |
| 2014-03-31 | 3015.10 | 未披露 |
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from December 31, 2012 to January 29, 2014
Stock issued in a private transaction, net of offering cost of $830
Stock issued to settle bankruptcy claims
Stock issued through exercise of warrants
Stock-based compensation
Effective for trading purposes on January 29, 2014, our common stock underwent a one-for-ten (1:10) reverse stock split.
|
2014-01-29 |
| 2012-08-31 | 2884.12 | 未披露 |
更多>>
from December 31, 2010 to December 31, 2011
Issuance of non-vested stock
Forfeitures
Shares repurchased for withholding taxes
Employee vesting of treasury stock held by Subsidiary
On July 12, 2011, the shareholders of the Company approved a one-for-ten reverse split of the common stock of the Company which became effective on July 13, 2011.
|
2011-12-31 |
| 2011-11-09 | 2887.02 | 未披露 | 定期报告 | 2011-11-01 |
| 2011-11-09 | 2887.00 | 未披露 |
更多>>
FROM December 31, 2010 TO September 30, 2011
Issuance of vested stock
Shares repurchased for withholding taxes
Forfeitures
Employee vesting of treasury stock held by subsidiary
On July 12, 2011, the shareholders of the Company approved a one-for-ten reverse split of the common stock of the Company which became effective on July 13, 2011.
|
2011-09-30 |
| 2011-08-04 | 2888.29 | 未披露 | 定期报告 | 2011-08-01 |
| 2011-08-04 | 2909.50 | 未披露 |
更多>>
From Dec 31 2010 to July 14 2011
Issuance of vested stock
Shares repurchased for withholding taxes
Forfeitures
All common share amounts (except par value and par value per share amounts) have been retroactively restated as of June 30, 2011 to reflect the Company’s one-for-ten reverse common stock split effective July 13, 2011
|
2011-07-14 |
| 2011-07-13 | 2860.27 | 未披露 |
更多>>
Delta’s stockholders approved a proposal to effect a reverse split of Delta’s common stock at a ratio of 1-for-10 and a reduction in the number of authorized shares of common stock available for issuance from 600,000,000 to 200,000,000.
|
2011-07-13 |
| 2011-05-10 | 28602.75 | 未披露 | 定期报告 | 2011-05-05 |
| 2011-05-10 | 28612.60 | 未披露 |
更多>>
Issuance of vested stock
|
2011-03-31 |
| 2011-03-16 | 28612.57 | 未披露 | 定期报告 | 2011-03-15 |
| 2011-03-16 | 28513.80 | 未披露 |
更多>>
Issuance of non-vested stock
Forfeitures of non-vested stock
Shares repurchased for withholding taxes
|
2010-12-31 |
| 2010-11-09 | 28521.62 | 未披露 | 定期报告 | 2010-11-01 |
| 2010-11-09 | 28563.70 | 未披露 |
更多>>
Issuance of vested stock
Shares repurchased for withholding taxes
Forfeiture of restricted shares
|
2010-09-30 |
| 2010-08-09 | 28140.71 | 未披露 | 定期报告 | 2010-08-02 |
| 2010-08-09 | 28276.00 | 未披露 |
更多>>
Issuance of vested stock
Shares repurchased for withholding taxes
Forfeiture of restricted shares
|
2010-06-30 |
| 2010-05-10 | 28278.36 | 未披露 | 定期报告 | 2010-05-01 |
| 2010-05-10 | 28281.20 | 未披露 |
更多>>
Issuance of vested stock
Shares repurchased for withholding taxes
Forfeiture of restricted shares
|
2010-03-31 |
| 2010-03-12 | 28284.44 | 未披露 | 定期报告 | 2010-02-28 |
| 2010-03-12 | 28250.60 | 未披露 |
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From December 31, 2008 to December 31, 2009
Shares issued for cash, net of offering costs
Issuance of non-vested stock
Forfeitures of non-vested stock
Shares repurchased for withholding taxes
Cancellation of executive performance shares, tranches 4 and 5
Cancellation of restricted shares due to reductions in force
Executive severance – issuance
Executive severance – forfeiture
|
2009-12-31 |
| 2009-03-02 | 10344.34 | 未披露 | 定期报告 | 2009-02-27 |
| 2009-03-02 | 10338.80 | 未披露 |
更多>>
From December 31, 2007 to December 31, 2008
Shares issued for cash, net of offering costs
Shares issued for cash upon exercise of options
Issuance of non-vested stock
Shares repurchased for withholding taxes
Cancellation of executive performance shares, tranches 4 and 5
|
2008-12-31 |
| 2008-02-29 | 10282.99 | 未披露 | 定期报告 | 2008-02-29 |
| 2008-02-29 | 6642.90 | 未披露 |
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From December 31, 2006 to December 31, 2007
Shares issued for oil and gas properties
Shares issued for cash, net of offering costs
Shares issued for cash or return of shares upon exercise of options or vesting of restricted stock
|
2007-12-31 |
| 2007-03-08 | 5775.26 | 未披露 | 定期报告 | 2007-03-02 |
| 2007-03-08 | 5443.90 | 未披露 |
更多>>
From December 31, 2005 to December 31, 2006
Shares issued for acquisition of Castle and oil and gas properties
Shares issued for cash, net of offering costs
Shares issued for drilling rig assets
Shares issued for cash or return of shares upon exercise of options or vesting of restricted stock
Issuance and amortization of non-vested stock
|
2006-12-31 |
| 2006-04-28 | 5110.65 | 未披露 | 定期报告 | 2006-03-31 |
| 2006-03-10 | 5101.32 | 未披露 | 定期报告 | 2006-02-28 |
| 2006-03-10 | 4782.50 | 未披露 |
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From June 30, 2005 to December 31, 2005
Shares issued for oil and gas properties
Shares issued for cash, net of offering costs
Shares issued for cash upon exercise of options
Issuance and amortization of unearned compensation
|
2005-12-31 |
| 2005-09-20 | 4217.00 | 未披露 | 定期报告 | 2005-09-12 |
| 2005-09-20 | 4201.70 | 未披露 |
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From June 30, 2004 to June 30, 2005
Shares issued for oil and gas properties
Shares issued for drilling equipment
Shares issued for cash upon exercise of options, net
Issuance of restricted options
|
2005-06-30 |
| 2004-09-13 | 3931.49 | 未披露 | 定期报告 | 2004-09-10 |
| 2004-09-13 | 3844.70 | 未披露 |
更多>>
From June 30, 2003 to June 30, 2004
Shares issued for cash, net
Shares issued for oil and gas properties
Shares issued for cash upon exercise of options
|
2004-06-30 |
| 2003-09-23 | 2341.80 | 未披露 | 定期报告 | 2003-09-15 |
| 2003-09-23 | 2328.60 | 未披露 |
更多>>
From June 30, 2002 to June 30, 2003
Shares issued for oil and gas properties
Shares issued for cash upon exercise of options
|
2003-06-30 |
| 2002-09-24 | 2265.90 | 未披露 | 定期报告 | 2002-09-18 |
| 2002-09-24 | 2261.80 | 未披露 |
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From July 1, 2001 to June 30, 2002
Shares issued for cash,net of commissions
Shares issued for cash upon exercise of options
Shares issued for services
Shares issued for oil and gas properties
Shares issued for all outstanding shares of Piper Petroleum Company
Shares issued for debt
Shares reacquired and retired
|
2002-06-30 |
| 2001-12-31 | 1116.48 | 未披露 | 定期报告 | 2001-10-01 |
| 2001-12-31 | 1116.00 | 未披露 |
更多>>
From June 30, 2000 to June 30, 2001
Shares issued for cash, net of commissions
Shares issued for cash upon exercise of options
Conversion of note payable and accrued interest to common stock
Shares issued for oil and gas properties, net
Shares reacquired and retired
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2001-06-30 |
From June 30, 2025 to September 30, 2025
Stock-based compensation
Purchase of common stock for retirement
From March 31, 2025 to June 30, 2025
Issuance of common stock for employee stock purchase plan
Stock-based compensation
Purchase of common stock for retirement
From December 31, 2024 to March 31, 2025
Stock-based compensation
Purchase of common stock for retirement
From December 31, 2023 to December 31, 2024
Issuance of common stock for employee stock purchase plan
Purchase of common stock for retirement
Stock-based compensation
Exercise of stock options
From June 30, 2024 to September 30, 2024
Purchase of common stock for retirement
Stock-based compensation
From March 31, 2024 to June 30, 2024
Issuance of common stock for employee stock purchase plan
Stock-based compensation
Purchase of common stock for retirement
From December 31, 2023 to March 31, 2024
Purchase of common stock for retirement
Stock-based compensation
From December 31, 2022 to December 31, 2023
Issuance of common stock for employee stock purchase plan
Stock-based compensation
Purchase of common stock for retirement
Exercise of stock options
From June 30, 2023 to September 30, 2023
Purchase of common stock for retirement
Stock-based compensation
Exercise of stock options
From March 31, 2023 to June 30, 2023
Stock-based compensation
Purchase of common stock for retirement
Issuance of common stock for employee stock purchase plan
From December 31, 2022 to March 31, 2023
Purchase of common stock for retirement
Stock-based compensation
Exercise of stock options
From December 31, 2021 to December 31, 2022
Issuance of common stock for employee stock purchase plan
Purchase of common stock for retirement
Stock-based compensation
Exercise of stock options
From June 30, 2022 to September 30, 2022
Stock-based compensation
Purchase of common stock for retirement
From March 31, 2022 to June 30, 2022
Issuance of common stock for employee stock purchase plan
Stock-based compensation
From December 31, 2021 to March 31, 2022
Stock-based compensation
Purchase of common stock for retirement
From December 31, 2020 to December 31, 2021
Common stock offering, net of issuance costs
Issuance of common stock for employee stock purchase plan
Stock-based compensation
Purchase of common stock for retirement
Exercise of stock options
From June 30, 2021 to September 30, 2021
Stock-based compensation
Purchase of common stock for retirement
From March 31, 2021 to June 30, 2021
Issuance of common stock for employee stock purchase plan
Stock-based compensation
From December 31, 2020 to March 31, 2021
Common stock offering, net of issuance costs
Stock-based compensation
Purchase of common stock for retirement
Exercise of stock options
From December 31, 2019 to December 31, 2020
Issuance of common stock for employee stock purchase plan
Exercise of common stock warrants
Stock-based compensation
Purchase of common stock for retirement
From June 30, 2020 to September 30, 2020
Stock-based compensation
Purchase of common stock for retirement
From March 31, 2020 to June 30, 2020
Issuance of common stock for employee stock purchase plan
Stock-based compensation
From December 31, 2019 to March 31, 2020
Exercise of common stock warrants
Stock-based compensation
Purchase of common stock for retirement
From December 31, 2018 to December 31, 2019
Issuance of common stock in connection with acquisition
Issuance of common stock for convertible notes repurchase, net
Issuance of common stock for employee stock purchase plan
Stock-based compensation
Purchase of common stock for retirement
Exercise of stock options
from June 30, 2019 to September 30, 2019
Stock-based compensation
Purchase of common stock for retirement
Exercise of stock options
From March 31, 2019 to June 30, 2019
Issuance of common stock for convertible notes repurchase, net
Issuance of common stock for employee stock purchase plan
Stock-based compensation
Purchase of common stock for retirement
Exercise of stock options
from December 31, 2018 to March 31, 2019
Issuance of common stock
Stock-based compensation
Purchase of common stock for retirement
from December 31, 2017 to December 31, 2018
Issuance of common stock in connection with acquisition
Stock-based compensation
Purchase of common stock for retirement
from December 31, 2016 to December 31, 2017
Stock-based compensation
Purchase of common stock for retirement
from December 31, 2015 to December 31, 2016
Issuance of common stock, net of offering costs of $1.0 million
Stock-based compensation
Conversion of Bridge Notes
Purchase of common stock for retirement
from December 31, 2014 to December 31, 2015
Issuance of common stock, net of offering costs of $1.0 million
Exercise of common stock warrants
Stock-based compensation
Purchase of common stock for retirement
from December 31, 2013 to December 31, 2014
Issuance of common stock, net of offering costs of $237 thousand
Bankruptcy claim settlements
Exercise of common stock warrants
Share-based compensation
from December 31, 2012 to January 29, 2014
Stock issued in a private transaction, net of offering cost of $830
Stock issued to settle bankruptcy claims
Stock issued through exercise of warrants
Stock-based compensation
Effective for trading purposes on January 29, 2014, our common stock underwent a one-for-ten (1:10) reverse stock split.
from December 31, 2010 to December 31, 2011
Issuance of non-vested stock
Forfeitures
Shares repurchased for withholding taxes
Employee vesting of treasury stock held by Subsidiary
On July 12, 2011, the shareholders of the Company approved a one-for-ten reverse split of the common stock of the Company which became effective on July 13, 2011.
FROM December 31, 2010 TO September 30, 2011
Issuance of vested stock
Shares repurchased for withholding taxes
Forfeitures
Employee vesting of treasury stock held by subsidiary
On July 12, 2011, the shareholders of the Company approved a one-for-ten reverse split of the common stock of the Company which became effective on July 13, 2011.
From Dec 31 2010 to July 14 2011
Issuance of vested stock
Shares repurchased for withholding taxes
Forfeitures
All common share amounts (except par value and par value per share amounts) have been retroactively restated as of June 30, 2011 to reflect the Company’s one-for-ten reverse common stock split effective July 13, 2011
Delta’s stockholders approved a proposal to effect a reverse split of Delta’s common stock at a ratio of 1-for-10 and a reduction in the number of authorized shares of common stock available for issuance from 600,000,000 to 200,000,000.
Issuance of vested stock
Issuance of non-vested stock
Forfeitures of non-vested stock
Shares repurchased for withholding taxes
Issuance of vested stock
Shares repurchased for withholding taxes
Forfeiture of restricted shares
Issuance of vested stock
Shares repurchased for withholding taxes
Forfeiture of restricted shares
Issuance of vested stock
Shares repurchased for withholding taxes
Forfeiture of restricted shares
From December 31, 2008 to December 31, 2009
Shares issued for cash, net of offering costs
Issuance of non-vested stock
Forfeitures of non-vested stock
Shares repurchased for withholding taxes
Cancellation of executive performance shares, tranches 4 and 5
Cancellation of restricted shares due to reductions in force
Executive severance – issuance
Executive severance – forfeiture
From December 31, 2007 to December 31, 2008
Shares issued for cash, net of offering costs
Shares issued for cash upon exercise of options
Issuance of non-vested stock
Shares repurchased for withholding taxes
Cancellation of executive performance shares, tranches 4 and 5
From December 31, 2006 to December 31, 2007
Shares issued for oil and gas properties
Shares issued for cash, net of offering costs
Shares issued for cash or return of shares upon exercise of options or vesting of restricted stock
From December 31, 2005 to December 31, 2006
Shares issued for acquisition of Castle and oil and gas properties
Shares issued for cash, net of offering costs
Shares issued for drilling rig assets
Shares issued for cash or return of shares upon exercise of options or vesting of restricted stock
Issuance and amortization of non-vested stock
From June 30, 2005 to December 31, 2005
Shares issued for oil and gas properties
Shares issued for cash, net of offering costs
Shares issued for cash upon exercise of options
Issuance and amortization of unearned compensation
From June 30, 2004 to June 30, 2005
Shares issued for oil and gas properties
Shares issued for drilling equipment
Shares issued for cash upon exercise of options, net
Issuance of restricted options
From June 30, 2003 to June 30, 2004
Shares issued for cash, net
Shares issued for oil and gas properties
Shares issued for cash upon exercise of options
From June 30, 2002 to June 30, 2003
Shares issued for oil and gas properties
Shares issued for cash upon exercise of options
From July 1, 2001 to June 30, 2002
Shares issued for cash,net of commissions
Shares issued for cash upon exercise of options
Shares issued for services
Shares issued for oil and gas properties
Shares issued for all outstanding shares of Piper Petroleum Company
Shares issued for debt
Shares reacquired and retired
From June 30, 2000 to June 30, 2001
Shares issued for cash, net of commissions
Shares issued for cash upon exercise of options
Conversion of note payable and accrued interest to common stock
Shares issued for oil and gas properties, net
Shares reacquired and retired