Kodiak Sciences Inc. Notes to Consolidated Financial Statements (in thousands, except share and per share data) 91 Marketable Securities The Company may invest excess cash balances in marketable securities. The investments in marketable securities are classified as either held-to-maturity or available-for-sale based on facts and circumstances present at the time of purchase. Marketable securities with a remaining maturity date greater than one year are classified as non-current. The Company’s marketable securities can consist of U.S. treasury securities, commercial paper, and corporate bonds. Marketable debt securities that are available for sale, are carried at fair value with the unrealized gains and losses included in other comprehensive income (loss) as a component of stockholders’ equity until realized. Any premium or discount arising at purchase of marketable debt securities is amortized and/or accreted to interest income or expense over the life of the instrument. Realized gains and losses are determined using the specific identification method and are included in other income (expense), net. Restricted Cash As of December 31, 2024, and 2023, the Company had $6.2 and $6.3 million of long-term restricted cash deposited with financial institutions. The entire amount is held in separate bank accounts to support letter of credit agreements related to the Company’s U.S. corporate offices. Derivatives and Hedging Derivative instruments that do not qualify for hedge accounting are recognized on the consolidated balance sheet at fair value, with changes in the fair value recognized on the consolidated statement of operations and comprehensive loss as a component of other income (expense), net. The cash flows associated with these derivatives are reflected as cash flows from investing activities in the consolidated statement of cash flows. Fair Value of Financial Instruments Accounting Standards Codification (“ASC”) 820, Fair Value Measurement, establishes a fair value hierarchy for instruments measured at fair value that distinguishes between assumptions based on market data (observable inputs) and the Company's own assumptions (unobservable inputs). Observable inputs are inputs that market participants would use in pricing the asset or liability based on market data obtained from sources independent of the Company. Unobservable inputs are inputs that reflect the Company's assumptions about the inputs that market participants would use in pricing the asset or liability and are developed based on the best information available in the circumstances. Fair value is an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. As a basis for considering market participant assumptions in fair value measurements, ASC 820 establishes a three-tier fair value hierarchy that distinguishes between the following: Level 1—Observable inputs, such as quoted prices in active markets for identical assets or liabilities at the measurement date. Level 2—Observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 3—Unobservable inputs which reflect management’s best estimate of what market participants would use in pricing the asset or liability at the measurement date. Consideration is given to the risk inherent in the valuation technique and inputs to the model. To the extent that the valuation is based on models or inputs that are less observable or unobservable in the market, the determination of fair value requires more judgment. Accordingly, the degree of judgment exercised by the Company in determining fair value is greatest for instruments categorized in Level 3. A financial instrument's level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. The carrying amounts of the Company’s financial instruments consisting of cash and cash equivalents, prepaid expenses and other current assets, accounts payable and accrued liabilities and other current liabilities, approximate fair value due to their relatively short maturities.