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Stock-based Compensation (Tables)

3 Months Ended

Mar. 31, 2025

Share-based Payment Arrangement [Abstract]

Summary of Stock Option Transations

The following table summarizes the stock option transactions for the 2023 Plan:

		Total Options					Weighted Average Exercise Price				Weighted Average Remaining Contractual Term (years)					Aggregate Intrinsic Value (in thousands)
Outstanding at December 31, 2024			2,824,443			$		5.51				8.15			$		210
Granted			35,000					2.77				9.83					—
Cancelled			(13,889	)				3.58				—					—
Outstanding at March 31, 2025			2,845,554			$		5.48				7.84			$		2
Vested and exercisable at March 31, 2025			1,497,856			$		6.32				6.87			$		2

Schedule of Assumptions Using Black-Scholes to Estimate Fair Value of the Stock Option Grants

The following are the underlying assumptions in Black-Scholes to determine the fair value of the stock option grants for the three months ended March 31, 2025 and 2024:

		Three Months Ended March 31,
		2025		2024
Risk free interest rate		3.16%		2.94%
Expected volatility		97%		89%
Expected term (years)		6.01		6.25
Expected dividend yield		0%		0%

Summary of Restricted Stock Units (RSU) Activity

The following table summarizes restricted stock unit activity for the CalciMedica Plans:

		Number of Restricted Stock Units					Weighted Average Grant Date Fair Value
Outstanding at December 31, 2024			40,000			$		3.50
Outstanding at March 31, 2025			40,000			$		3.50
Vested and exercisable at March 31, 2025			—			$		—

Summary of Stock-Based Compensation Expense Recognized for Options and RSUs Granted

Stock-based compensation expense recognized for options and restricted stock units granted was as follows (in thousands):

		Three Months Ended March 31,
		2025				2024
Research and development		$	177			$	171
General and administrative			372				243
Total stock-based compensation expense		$	549			$	414

Schedule of Common Stock Reserved for Future Issuance

Common stock reserved for future issuance consists of the following at March 31, 2025:

		March 31,
		2025
Common stock warrants			3,993,784
Stock options issued and outstanding			2,845,554
Restricted stock units outstanding			40,000
Shares available for issuance under the 2023 Plan			1,473,250
Shares available under the 2023 ESPP			257,364
Total			8,609,952

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Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement.

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Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year.

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