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Stock-based Compensation (Tables) | 6 Months Ended
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Jun. 30, 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 |  |  | $ |  | 316 |
Granted |  |  | 1,994,652 |  |  |  |  | 1.55 |  |  |  | 9.86 |  |  |  |  | 134 |
Cancelled |  |  | (40,000 | ) |  |  |  | 3.71 |  |  |  | — |  |  |  |  | — |
Outstanding at June 30, 2025 |  |  | 4,779,095 |  |  | $ |  | 3.87 |  |  |  | 8.57 |  |  | $ |  | 134 |
Vested and exercisable at June 30, 2025 |  |  | 2,149,098 |  |  | $ |  | 5.04 |  |  |  | 7.67 |  |  | $ |  | 38 |
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 six months ended June 30, 2025 and 2024:
|  | Six Months Ended June 30,
|  | 2025 |  | 2024
Risk free interest rate |  | 3.49% |  | 2.96%
Expected volatility |  | 101% |  | 89%
Expected term (years) |  | 5.87 |  | 6.08
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 June 30, 2025 |  |  | 40,000 |  |  | $ |  | 3.50 |
Vested and exercisable at June 30, 2025 |  |  | — |  |  | $ |  | — |
Summary of Stock-Based Compensation Expense Recognized for Options and RSUs and Common Stock Warrants Granted | Stock-based compensation expense recognized for options, RSU’s and Common Stock Warrants granted was as follows (in thousands):
|  | Three Months Ended June 30, |  |  | Six Months Ended June 30, |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Research and development |  | $ | 381 |  |  | $ | 190 |  |  | $ | 559 |  |  | $ | 361 |
General and administrative |  |  | 793 |  |  |  | 296 |  |  |  | 1,165 |  |  |  | 539 |
Total stock-based compensation expense |  | $ | 1,174 |  |  | $ | 486 |  |  | $ | 1,724 |  |  | $ | 900 |
Schedule of Common Stock Reserved for Future Issuance | Common stock reserved for future issuance consists of the following at June 30, 2025:
|  | June 30, |
|  | 2025 |
Common stock warrants |  |  | 3,993,784 |
Stock options issued and outstanding |  |  | 4,779,095 |
Restricted stock units outstanding |  |  | 40,000 |
Shares available for issuance under the 2023 Plan |  |  | 139,709 |
Shares available under the 2023 ESPP |  |  | 257,364 |
Total |  |  | 9,209,952 |

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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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