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Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2024

Share-Based Payment Arrangement [Abstract]

Summary of common stock reserved for future issuance

As of December 31, 2024, the Company had reserved shares of its common stock for future issuance as follows:

		Shares Reserved
Common stock options outstanding			2,393,824
Unvested restricted stock units under the 2023 Plan			213,254
Unreleased restricted stock units assumed in the Merger			17,000
Available for future grants under the 2024 Equity Incentive Plan			747,867
Available for future grants under the 2024 Employee Stock Purchase Plan			137,500
Total shares of common stock reserved for future issuance			3,509,445

Summary of the Company's stock option activity

A summary of the Company’s stock option activity and related information for the year ended December 31, 2024 is as follows:

		Options Outstanding
		Number of Options				Weighted Average Exercise Price				Weighted Average Remaining Contractual Term (in years)				Aggregate Intrinsic Value (in thousands)
Options outstanding – December 31, 2023			178,232			$	16.74				8.88			$	16
Assumed in reverse recapitalization			467,100				47.39
Granted			1,775,318				18.13
Exercised			(2,476	)			10.19
Expired			(740	)			21.62
Forfeited			(23,610	)			38.34
Options outstanding – December 31, 2024			2,393,824			$	23.54				7.90			$	1
Options exercisable – December 31, 2024			654,636			$	38.08				3.07			$	1

Summary of weighted-average assumptions to determine the fair value of the employee stock option

The weighted-average assumptions used in the Black-Scholes option pricing model to determine the fair value of the employee stock option grants were as follows:

		Year Ended December 31,
		2024				2023
Expected term (years)			5.77				5.73
Expected volatility			126.2	%			32.0	%
Risk-free interest rate			3.80	%			4.31	%
Expected dividend yield			0	%			0	%

Summary of RSU and RSA activities

The following table summarizes RSU and RSA activities during the year ended December 31, 2024:

		Number of Shares				Weighted Average Grant Date Fair Value
Unvested balance as of December 31, 2023			214,436			$	22.88
Granted			—				—
Vested (RSA)			(638	)			0.83
Forfeited			(544	)			22.88
RSUs outstanding – December 31, 2024			213,254			$	22.88
Unvested balance as of December 31, 2024			213,254			$	22.88

Summary of Non-cash stock-based compensation expense recorded

The following table shows the allocation of share-based compensation expense related to the company’s share-based awards (in thousands):

		December 31,
		2024				2023
Research and development		$	2,896			$	98
General and administrative			1,634				101
Total		$	4,530			$	199

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Tabular disclosure of common shares reserved for future issuance.

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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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Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

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