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Stock-Based Compensation | 12 Months Ended
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Dec. 31, 2024
Share-Based Payment Arrangement [Abstract] |
Stock-Based Compensation | (17) Stock-Based Compensation Stock Incentive Plans 2015 Incentive Plan The Company is authorized to grant shares of restricted stock, restricted stock units (“RSUs”), stock appreciation rights, cash incentive awards and options to purchase shares of common stock to employees and non-employees inclusive of directors pursuant to its 2015 Incentive Plan (the “2015 Plan”). The 2015 Plan also designates that shares may be used for performance-based awards and market-based awards. The vesting period for awards granted under the 2015 Plan is generally determined by the Board of Directors at the date of the grant. Generally, the awards vest one third each year, over 3 years. The total number of shares of common stock reserved and available for distribution under the 2015 Plan and the total number of shares of common stock that can be issued pursuant to stock options is 29,235,000 shares. Stock-based compensation expense is generally included in selling, general and administrative expenses in the consolidated statements of operations. Systemic Bio Phantom Unit Plan During the year ended December 31, 2023, we began granting phantom unit awards ("Phantom Units") under a new compensation plan designed for employees and non-employees performing services for Systemic Bio, a wholly-owned subsidiary of 3D Systems Corporation. All awards granted under the plan are subsidiary-level awards. The Phantom Units granted under the plan include both a time-based vesting condition (generally 4 years, subject to acceleration in connection with specified liquidity events) and a market condition that is met if (1) the value of Systemic Bio exceeds a specified multiple of the capital invested in this subsidiary (the "hurdle") and (2) the business achieves a specified minimum internal rate of return. The market conditions will be assessed upon (A) a trigger event (e.g., change in control, IPO or plan expiration of December 31, 2030) and/or (B) an interim liquidity event (defined as January 1, 2028) that occurs prior to a trigger event. All awards under the plan will be liability-classified due to our intention to settle these awards with cash; although, we have discretion to partially or fully settle these awards in equity upon vesting. Liability classification of the awards requires them to be remeasured at their fair value at the end of each reporting period. Due to the presence of the market-condition and the fact that Systemic Bio does not have a readily available share price, the awards are valued using a Monte Carlo simulation with the assistance of a third-party valuation firm. This valuation requires significant judgment regarding the input of various assumptions and estimates, which include the projected cash flows of (including projected capital invested in) Systemic Bio, the probability and/or timing of a trigger event or a liquidity event, the expected stock price volatility for selected public companies with comparable characteristics to Systemic Bio, the discount for the lack of marketability of Systemic Bio as a privately-held company, and the risk-free interest rate. Restricted Stock and Restricted Stock Units A summary of our restricted stock and RSU activity for the years ended December 31, 2024, 2023 and 2022 is as follows:
(in thousands, except per share amounts) |  | Number of Shares/Units |  | Weighted Average Grant Date Fair Value
Outstanding as of December 31, 2021 — unvested |  | 3,980 |  |  | $ | 19.72 |
Granted |  | 4,422 |  |  | $ | 15.23 |
Canceled |  | (700) |  |  | $ | 16.90 |
Vested |  | (2,687) |  |  | $ | 15.92 |
Outstanding as of December 31, 2022 — unvested |  | 5,015 |  |  | $ | 18.19 |
Granted |  | 4,439 |  |  | $ | 10.26 |
Canceled |  | (1,118) |  |  | $ | 15.45 |
Vested |  | (2,154) |  |  | $ | 13.09 |
Outstanding as of December 31, 2023 — unvested |  | 6,182 |  |  | $ | 14.77 |
Granted |  | 3,392 |  |  | $ | 1.98 |
Canceled |  | (1,845) |  |  | $ | 14.69 |
Vested |  | (2,544) |  |  | $ | 13.28 |
Outstanding as of December 31, 2024 — unvested |  | 5,185 |  |  | $ | 7.16 |
Included in the above outstanding balance as of December 31, 2024 are 1,435,000 shares of restricted stock that vest under specified market conditions, which were awarded to certain employees in 2024, 2023, and 2022. Systemic Bio Phantom Unit Plan During the years ended December 31, 2024 and 2023, we granted 147,000 and 597,000 Phantom Units, respectively. As of December 31, 2024 and 2023, 721,000 and 596,000 Phantom Units were outstanding. During the years ended December 31, 2024 and 2023, we recognized $0.1 and $0.5 million of compensation expense related to the Phantom Units. As of December 31, 2024 and 2023, the liability recognized in other liabilities on the consolidated balances sheets for the Phantom Units was $0.6 million and $0.5 million, respectively. The Phantom Units are excluded from the restricted stock and RSU summary table above. Stock Options During the year ended December 31, 2016, we awarded certain employees market condition stock options under the 2015 Plan that vest under specified market conditions. Each employee was generally awarded two equal tranches of market condition stock options that immediately vest when our common stock trades at either $30 or $40 per share for ninety consecutive calendar days. We recognize compensation expense related to stock options on a straight-line basis over the derived term of the awards. The fair value of stock options with market conditions is estimated using a binomial lattice Monte Carlo simulation model. Expense for awards with a market condition is not reversed if the market condition is not met. Stock option activity for the year ended December 31, 2024 was as follows:
|  | Year Ended December 31, 2024
(in thousands, except per share amounts) |  | Number of Shares |  | Weighted Average Exercise |  | Weighted Average Remaining Contractual Term (in years) |  | Aggregate Intrinsic Value
Stock option activity: |  |  |  |  |  |  |  |
Outstanding at beginning of year |  | 420 |  |  | $ | 13.26 |  |  | 2.7 |  | $ | — |
Granted |  | — |  |  | — |  |  | — |  |  | — |
Exercised |  | — |  |  | — |  |  | — |  |  | — |
Forfeited and expired |  | (260) |  |  | 13.26 |  |  | — |  |  | — |
Outstanding at end of year |  | 160 |  |  | $ | 13.26 |  |  | 1.6 |  | $ | — |
During the years ended December 31, 2023 and December 31, 2022, there was no stock option activity. The aggregate intrinsic value of the outstanding stock options was $0 and $3.5 million as of December 31, 2022 and 2021, respectively. As of December 31, 2024 and 2023, none of the outstanding stock options were exercisable, and there was no unrecognized stock-based compensation expense related to stock options. Other Compensation Arrangements that Include Share Settlement Regenerative Medicine Earnout Payments and Performance-Based Stock Units Volumetric Acquisition Earnout Payments On December 1, 2021, the Company acquired Volumetric Biotechnologies, Inc. (“Volumetric”). Pursuant to the terms of the related acquisition agreement, the Company was potentially subject to aggregate earnout payments of up to $355.0 million (i.e., incremental to the previously paid acquisition purchase price). These earnout payments would be triggered by (1) the achievement of seven discrete non-financial milestones, each of which required attainment prior to either December 31, 2030 or December 31, 2035, and (2) the continued employment of certain Volumetric key employees. Each potential milestone-based payment was deemed to be compensation expense that the Company would recognize ratably from the point in time when a milestone was deemed probable of achievement through the estimated time of achievement. Each milestone payment, if earned, would be expected to be settled approximately half in cash and half in shares of Common Stock and, accordingly, expense recognized for the portion of this earnout that is expected to be settled with shares of Common Stock would be reflected in the disclosure of stock-based compensation included herein, if and when accrued. In February 2024, the Company informed the former owners of Volumetric, to whom the acquisition-related earnout payments of up to $355.0 million could have potentially become payable, that four of the seven milestone-related earnout payments, each of which was related to kidney and liver research, were terminated. These four milestone-based earnout payments were terminated in accordance with the terms of the Volumetric acquisition agreement, based upon a determination that achievement was no longer financially viable due to the loss of the funding required from the Company's key strategic partner for the related research and development efforts. Upon termination of the four milestone-based earnout payments, the Company's maximum liability for earnout payments attributable to the acquisition of Volumetric was reduced to $175.0 million, which would be payable if (1) each of the three remaining non-financial, science-based milestones was achieved within the timeframes set forth in the Volumetric acquisition agreement and (2) the certain key individuals from Volumetric continue to be employed. On April 29, 2024, two key employees from Volumetric ("Volumetric Key Employees"), who were required to be employed at the time of achievement of each non-financial, science-based milestone outlined in the Volumetric acquisition agreement for each related acquisition earnout payment to become payable, resigned from their positions with the Company. As a result of the resignation of the Volumetric Key Employees, all parties to which the remaining three milestone-based earnout payments totaling $175.0 million were potentially payable were notified that such amount was no longer eligible to be earned. While the Volumetric Key Employees claim that their terminations were for good reason, which would preserve the rights to milestone-based earnout payments under the Volumetric acquisition agreement, the Company vigorously denies this claim. Refer to Note 22 for further details regarding the resignation of the certain Volumetric Key Employees and all related actions occurring thereafter. Regenerative Medicine Performance-Based Stock Units The Company previously granted certain performance-based stock units (“PSUs” or the "RegMed Awards") to other employees with vesting terms that were based upon four individually-measured, science-based (i.e., non-financial) milestones to other employees who work on advancements in regenerative medicine related to lungs and tissue organs. The compensation expense associated with each individual milestone attributable to a RegMed Award was required to be recognized over the period commencing on the date that the respective milestone was deemed probable of being met through the anticipated date of achievement. During the fourth quarter of 2024, the Company cancelled all outstanding RegMed awards, which had an immaterial impact on the Company's consolidated financial statements. Earnout and PSU Compensation Expense Prior to the year ended December 31, 2023, the Company recognized compensation expense related to (1) one of the Volumetric milestones for which the potential earnout payment due to the sellers would be $65.0 million and (2) one RegMed Award milestone for which the aggregate grant date fair value of the outstanding and unvested awards was $4.5 million as of December 31, 2022, as the related milestone was deemed probable of achievement. During the year ended December 31, 2023, the Company reduced its budgeted funding for the research and development related to the respective Volumetric earnout and RegMed Award milestones, which resulted in the Company concluding that it was no longer probable that these respective milestones would be achieved by the end of the term of the Volumetric earnout arrangement or prior to the expiration of the RegMed Awards. In concluding that the Volumetric and RegMed Award milestone would no longer be achieved, the Company reversed all of the previously recognized compensation expense, one half of which was expected to be settled with Common Stock shares, which reduced selling, general and administrative expense by $18.4 million, and our reported net loss per basic and diluted share of Common Stock by $0.14 for the year ended December 31, 2023. No liability related to the Volumetric earnout was recognized on our consolidated balance sheets as of December 31, 2024 or December 31, 2023. dp polar Earnout On October 4, 2022 the Company acquired dp polar. The acquisition agreement included an earnout arrangement for $2.2 million incremental to the acquisition purchase price, which would be settled via the issuance of 250,000 shares of the Company's Common Stock. The issuance and vesting of these shares was contingent upon certain service conditions of a key individual from dp polar through December 31, 2024. Management concluded that this potential obligation for the issuance of 250,000 shares of Common Stock should be accounted for as compensation expense recognized over the individual's service period and, accordingly, the related expense is reflected in the disclosure of stock-based compensation included herein. During April 2024, due to a change in the key individual's employment status, all service conditions of the dp polar earnout were deemed to have been met based on the terms of the initial arrangement. Accordingly, all remaining expense related to these shares was recognized during the year ended December 31, 2024. This arrangement is expected to be settled via the issuance of 250,000 shares of Common Stock subsequent to December 31, 2024. Stock-Based Compensation Activity and Expense The following table shows the stock-based compensation expense recognized during the years ended December 31, 2024, 2023, and 2022:
(in thousands) |  | 2024 |  | 2023 |  | 2022
Stock-based compensation expense |  | $ | 18,457 |  |  | $ | 23,504 |  |  | $ | 42,415 |
Tax benefit |  | $ | — |  |  | $ | — |  |  | $ | — |
The Company has historically paid annual incentive compensation in shares of Common Stock that vest upon grant, however, the Company made a decision to fund its 2024 annual incentive compensation in cash, so there is no annual incentive compensation expense included in the above expense for the year ended December 31, 2024. The Company did not accrue and pay any annual incentive compensation related to the year ended December 31, 2023. Included in the above expense for the year ended December 31, 2022 is $4.0 million of expense relating to annual incentive compensation. Also, included in the above expenses for the years ended December 31, 2024, 2023, and 2022 are $0, $(8.6) million, and $8.0 million, respectively, of expense related to the Volumetric earnout arrangement discussed above. Finally, the above expenses for the years ended December 31, 2024, 2023, and 2022 include $1.0 million, $1.0 million and $0.3 million, respectively, of expense related to the dp polar earnout arrangement discussed above. At December 31, 2024, there was $19.2 million of unrecognized stock-based compensation expense related to all unvested equity awards, which we expect to recognize over a weighted-average period of 1.9 years.

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