Stock-Based Compensation |
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| Share-Based Payment Arrangement [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Stock-Based Compensation | Note 12. Stock-Based Compensation Stock-Based Compensation Plans In the first quarter of 2026, the Board of Directors approved an increase of 2.0 million shares of common stock to be reserved for issuance under the Amended and Restated 2025 Inducement Plan (the "Inducement Plan"). The Inducement Plan allows for issuance of up to 2,893,465 shares of Quanterix common stock. The only persons eligible to receive grants of nonqualified stock options, RSUs, and other stock-based awards under the Inducement Plan are individuals who satisfy the standards for inducement grants under Nasdaq Listing Rule 5635(c)(4). Stock option and ESPP activity during the three months ended March 31, 2026 was not material. Restricted Stock and Performance Stock Units RSUs represent the right to receive shares of common stock based on continued employment during the vesting period. Shares are delivered to the grantee upon vesting, less shares for the payment of withholding taxes. RSUs generally vest over a four year period. PSUs represent the right to receive shares of common stock based on the achievement of performance or market conditions and continued employment during the vesting period. During the three months ended March 31, 2026, the Company granted 3.2 million RSUs, which had a weighted average grant date fair value of $6.39 per share, and 1.2 million PSUs, which had a weighted average grant date fair value of $5.62 per share. For PSUs granted during the three months ended March 31, 2026, 0.8 million contained market vesting conditions based on the Company's volume weighted share price exceeding pre-set prices over a four year performance period. For the 0.4 million PSUs granted containing performance vesting conditions, the number of shares issuable at the end of the one year performance period could be up to 125% of the granted award and is based on the Company's performance against pre-set objectives. RSUs and PSUs vested or forfeit during the three months ended March 31, 2026 was not material. Stock-Based Compensation Expense Stock-based compensation expense was recorded in the following categories on the Consolidated Statements of Operations (in thousands):
As of March 31, 2026, total unrecognized stock-based compensation expense related to unvested Restricted Stock Awards and stock options was $44.9 million, which is expected to be recognized over the remaining weighted-average vesting period of 3.0 years.
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