In August 2018, iMDx shareholders approved an Equity Incentive Plan to replace the 2010 Stock Option Plan (the “2010 Plan”) and in October 2024, iMDx shareholders approved an amendment and restatement of such Equity Incentive Plan (as amended and restated, the “2018 Incentive Plan”). The 2018 Incentive Plan will expire on July 2, 2028. In initially adopting the 2018 Incentive Plan, iMDx terminated the 2010 Plan and ceased to grant any additional stock options or sell any stock under restricted stock purchase agreements under the 2010 Plan; however, stock options issued under the 2010 Plan continue in effect in accordance with their terms and the terms of the 2010 Plan until the exercise or expiration of the individual options. Total remaining stock options outstanding under the 2010 Plan as of June 30, 2026 and December 31, 2025, were 3,652 and 5,652, respectively.

As of June 30, 2026, 5,810,000 aggregate shares of common stock have been reserved for issuance under the equity incentive plans for the grant of stock options or the sale of restricted stock or for the settlement of RSUs. iMDx may also grant stock appreciation rights under the 2018 Incentive Plan. Upon the exercise of stock options, the issuance of RSAs, or the delivery of shares pursuant to vested RSUs or performance-based restricted stock units (“PSUs”), it is iMDx’s policy to issue new shares of common stock. The Board may amend or modify the 2018 Incentive Plan at any time, subject to any required shareholder approval. Shares available for grant under the 2018 Incentive Plan as of June 30, 2026 and December 31, 2025, were 2,122,030 and 528,200, respectively. On June 11, 2026, iMDx shareholders approved an amendment to the 2018 Incentive Plan to provide for an additional 1,750,000 shares of common stock to be available for the issuance of equity awards thereunder.

A summary of iMDx’s 2010 Plan and 2018 Incentive Plan activity and related information follows:


	Options								Nonvested RSUs
	Number Outstanding			Weighted Average Exercise Price		Weighted Average Remaining Contractual Life	Aggregate Intrinsic Value		Number Outstanding			Weighted Average Grant Date Fair Value
	(In thousands, except weighted average amounts)
Balance at December 31, 2025		2,251		$	7.11	8.92 years	$	8,537		852		$	3.03
Awards granted		69		$	6.20					89		$	5.47
Options exercised		(4	)	$	2.86		$	11	n/a			n/a
RSUs vested	n/a			n/a						(180	)	$	3.15
Options forfeited/expired		(2	)	$	57.28				n/a			n/a
RSUs forfeited	n/a			n/a						—		$	—
Balance at June 30, 2026		2,314		$	7.03	8.47 years	$	5,363		761		$	3.30
Options vested and expected to vest at June 30, 2026		2,314		$	7.03	8.47 years	$	5,363
Options exercisable at June 30, 2026		669		$	15.93	7.01 years	$	1,208
Stock-based compensation expense for the period	$	751							$	525
Unrecognized stock-based compensation expense	$	3,422							$	1,891
Weighted average remaining recognition period	2.18 years								2.17 years

During the six months ended June 30, 2026, the Company granted 68,743 total stock options with a weighted average grant date fair value of $4.71 per option. During the six months ended June 30, 2025, the Company granted 20,000 total stock options with a weighted average grant date fair value of $2.63 per option. The assumptions used to calculate the Black-Scholes grant date fair value for such time-based awards were as follows:

The weighted average grant date fair value of RSUs granted during the six months ended June 30, 2026 was $5.47 per unit. The weighted average grant date fair value of RSUs granted during the six months ended June 30, 2025 was $3.16 per unit. The aggregate fair value of RSUs vested during the six months ended June 30, 2026 and 2025, was $759,000 and $60,000, respectively.

During the six months ended June 30, 2025, the Company issued 17,761 shares of common stock from the 2018 Incentive Plan under immediate vest RSU awards in connection with two ongoing investor relations consulting service arrangements for a total fair value of $60,000. No such shares were issued during the six months ended June 30, 2026. During 2026, the Company issued additional restricted shares to one these consulting firms under unregistered restricted stock arrangements, refer to Note 7, “Common Stock – Unregistered Restricted Stock Issuance,” for additional information.

In October 2024, the Company awarded 100,000 PSUs with market-based and service-based vesting conditions, and a grant date market price of $3.05 to a Company executive. Vesting is subject to continuous service as an employee of iMDx or a subsidiary thereof from hire date through the applicable vesting date, and shall performance vest as follows: (i) 50% will vest upon the Company’s achievement of an aggregate market value of voting and non-voting common equity held by non-affiliates of the Company of $75.0 million or more, such that the Company is no longer subject to the “Baby Shelf Rules” of Form S-3, and (ii) 50% will vest upon the Company’s achievement of a market capitalization of $200.0 million, which shall be determined based on the 30-day volume weighted average price of the common stock measured as of the end of each full calendar month following the date of grant. No units will vest prior to June 20, 2025, and any units that are not performance vested on December 31, 2026 shall automatically be forfeited. The fair value of such award was estimated using the Monte Carlo simulation model. Assumptions and estimates utilized in the model include the risk-free interest rate, dividend yield, expected stock volatility and the expected period to achievement of the market conditions. The grant date fair value and associated compensation cost of the market-based award reflect the probability of the market condition being achieved, and the Company will recognize this compensation cost regardless of the actual achievement of the market-based conditions. Assumptions utilized in connection with the Monte Carlo valuation technique included: estimated risk-free interest rate of 3.93 percent; term of 2.2 years; expected volatility of 90.0 percent; and expected dividend yield of 0 percent. The risk-free interest rate was determined based on the yields available on U.S. Treasury zero-coupon issues. The expected stock price volatility was determined using historical volatility. The expected dividend yield was based on expectations regarding dividend payments. Based on the two described performance vesting conditions, the grant date fair values were $2.03 and $1.43, respectively, amounting to a total fair value of $173,000. On October 31, 2025, 50,000 PSUs vested based on the achievement of an aggregate market value of common equity held by non-affiliates of $75.0 million or more, as described above. As of June 30, 2026, no additional awards have vested.

iMDx recorded stock-based compensation expense in the following categories on the accompanying consolidated statements of operations:


	Three Months Ended June 30,				Six Months Ended June 30,
	2026		2025		2026		2025
	(In thousands)
Cost of revenues	$	—	$	—	$	—	$	—
Research and development		179		173		338		368
Sales and marketing		61		42		119		80
General and administrative		421		289		819		529
Total	$	661	$	504	$	1,276	$	977

Total unrecognized stock-based compensation expense as of June 30, 2026 was $5.3 million, which will be amortized over a weighted average remaining recognition period of 2.18 years.

The determination of stock-based compensation is inherently uncertain and subjective and involves the application of valuation models and assumptions requiring the use of judgment. If iMDx had made different assumptions, its stock-based compensation expense and results for the periods presented may have been significantly different. See Note 2, “Stock-Based Compensation,” for additional information.