[Announcement from EuroEasy Regarding Rebase Execution on ANTHROPIC Perpetual Contracts and X-Perp] Dear EuroEasy users: Easy will execute a rebase (proportional adjustment) on the ANTHROPIC-USDT-SWAP and ANTHROPIC-USD_UM_XPERP-311031 contracts at 17:00 (UTC+8) on November 12, 2026. The contract pricing basis will be adjusted from the original estimated share capital to the IPO reference share number calculated based on Anthropic's offering disclosure documents. The adjustment ratio is 1.3116. I. What is Rebase? Rebase is a one-time proportional adjustment of the contract quantity and price. Pre-IPO contracts use a per-share pricing basis: Contract Price × Total Share Capital of the Underlying Company ≈ Company Valuation. Before the public disclosure of relevant share capital information, the contract is priced based on the estimated share capital; after disclosure, the pricing basis is adjusted through rebase. The IPO reference share count used in this report is an adjusted estimate calculated based on the offering documents and the following assumptions, and is not the final post-IPO share count. Rebase's core design principle is value neutrality: the number of shares held is multiplied by the adjustment ratio, and the price is divided by the adjustment ratio. Without considering market volatility, funding costs, and rounding differences, Rebase itself does not change the value of the holdings or account equity. For detailed mechanisms, please refer to the "Pre-IPO Perpetual Contract" and the "Stock Company Action Mechanism." II. Affected Contracts and Execution Arrangements Project: ANTHROPIC-USDT-SWAP ANTHROPIC-USD_UM_XPERP-311031 Contract ID (instId): ANTHROPIC-USDT-SWAP ANTHROPIC-USD_UM_XPERP-311031 Rebase Start Time: November 12, 2026, 17:00 (UTC+8) November 12, 2026, 17:00 (UTC+8) Estimated Total Shares Outstanding: 10,000,000,000 shares (10 billion shares) 10,000,000,000 shares (10 billion shares) IPO Reference Shares (Adjusted Estimate): 13,116,075,288 shares 13,116,075,288 shares Adjustment Ratio for This Execution 1.3116 1.3116 Contract face value 1 1 Adjusted price step size Unchanged Unchanged Quantity step size Unchanged Unchanged Minimum order quantity Unchanged Unchanged Unchanged Unchanged The Anthropic IPO reference number of shares used this time is 13,116,075,288 shares, calculated as follows: Item Number of shares Number of shares after issuance disclosed in the offering document 13,086,672,593 Add: Subsequent acquisition of new shares (I) not included in the above base 561,963 Add: Subsequent acquisition of new shares (II) not included in the above base 848,882 Add: Subsequent donation matching shares 27,991,850 Total IPO reference number of shares 13,116,075,288 Amazon conversion included: The above number of shares includes 276,827,518 corresponding to Amazon conversion. Shares will not be counted twice; potential shares corresponding to remaining unconverted notes will not be included. Includes restricted shares: Existing shares sold in the secondary market will not be counted twice; unexercised options, unsettled RSUs, and unissued reserved shares will not be included. Therefore, this calculation is not a fully diluted share count. Estimation nature: The above share count is an adjusted estimate and may be updated with the final offering document. Based on the above reference share count and the original estimated share capital, 13,116,075,288 ÷ 10,000,000,000 = 1.3116075288; the actual rebase ratio executed this time is 1.3116. Source: S-1/A document dated November 10, 2026. The trading suspension duration depends on the actual processing and verification progress. After the adjustment is completed, the relevant contracts will enter the post-only (order only) phase, lasting at least 10 minutes. EuroEasy will resume normal trading based on the order book and market conditions. Please refer to the actual trading status of each contract and the latest notifications. III. How to Adjust Positions and Pending Orders Item Adjustment Rules Position Quantity Original position quantity × 1.3116, both long and short positions are adjusted proportionally. Mark Price Base Mark price before adjustment ÷ 1.3116; subsequent calculations will resume according to applicable rules. Unrealized Profit/Loss Old positions are settled at the mark price before adjustment; unrealized profit/loss is converted to realized profit/loss and added to the account balance. New Position Opening Average Price Reopens the position at the adjusted mark price, not by directly dividing the original opening average price by 1.3116. Completely Unfilled Limit Orders Price ÷ 1.3116, Quantity × 1.3116 of eligible orders; original order ID is retained. Partially Filled Limit Orders Only the remaining unfilled portion is adjusted: Price ÷ 1.3116, Quantity × 1.3116; a new order ID is generated after re-placing. Transaction records remain unchanged, and their resulting positions will be handled according to position rules. Untriggered stop-loss and take-profit orders, including position-based stop-loss, order-based stop-loss, and trailing stop-loss, will be cancelled and will not be automatically reinstated. Strategy orders: Running bot strategies will be stopped; planned orders and chasing limit orders will be cancelled. Please recreate them as needed after reinstatement. System settlement and re-opening fees: No transaction fees will be charged for system settlement of old positions and creation of new positions caused by this rebase. Normal funding fees and fees incurred by users' own trading will still be handled according to applicable rules. Precision processing: The absolute values of open positions and pending orders will be rounded down by the existing quantity increment of each contract. Pending order prices will be processed in 0.01 increments: buy orders will be rounded down, and sell orders will be rounded up. Pending orders with a quantity that is zero after rounding, lower than the minimum order size, or cannot pass other transaction verifications will be cancelled. The rounding difference in open positions will be handled according to applicable settlement rules. Please check the results against realized profits and losses, rounding records, and balance changes. IV. Impact on Trading Services Order placement, modification, cancellation, and matching are suspended for affected contracts. Please complete any necessary position or order adjustments before the suspension. Only Post-only orders can be submitted, and existing Post-only orders can be modified or cancelled. Market orders, IOC, FOK, regular limit orders, as well as new take-profit/stop-loss orders and planned orders are temporarily unavailable. Entering the Post-only phase does not mean that normal trading has resumed; 10 minutes does not mean that normal trading will automatically resume. Please promptly check your open positions, average opening price, realized profit/loss, account balance, and pending order status, and reset your take-profit/stop-loss and related strategies based on the adjusted price and open positions. V. Adjustment Example Taking ANTHROPIC-USDT-SWAP as an example, assuming a user held 10,000 long positions before rebase, with a contract face value of 1, an average opening price of 100 USDT, and a markup price of 131.16 USDT at the time of rebase. After adjustment at a ratio of 1.3116: Project Before Rebase After Rebase At Settlement Number of Contracts 10,000 13,116 Mark Price 131.16 USDT 100 USDT Average Opening Price 100 USDT 100 USDT Unrealized Profit/Loss 311,600 USDT 0 Realized Profit/Loss at Settlement — +311,600 USDT Notional Value of Position 1,311,600 USDT 1,311,600 USDT Previous unrealized profit/loss has been converted to realized profit/loss and has not disappeared. The average opening price for new positions is the mark price before adjustment divided by the adjustment ratio, i.e., 131.16 ÷ 1.3116 = 100 USDT. The above is for illustrative purposes only and ignores market fluctuations, funding fees, and rounding differences; the actual quantity must meet the contract quantity step requirements. VI. API User Notice This rebase involves two contracts: ANTHROPIC-USDT-SWAP and ANTHROPIC-USD_UM_XPERP-311031. After the rebase, the contract IDs (instId) seen and used by API users remain unchanged: ANTHROPIC-USDT-SWAP ANTHROPIC-USD_UM_XPERP-311031 After the rebase, the correspondence between the UI display name and the API contract ID is as follows: UI Display Name API Contract ID (instId, unchanged) ANTUSDT ANTHROPIC-USDT-SWAP ANTUSD UM ANTHROPIC-USD_UM_XPERP-311031 The UI display name does not replace the API contract ID. API users should continue to use the original instId for queries, subscriptions, and transactions, and should not use ANTUSDT or ANTUSD UM as the instId. Please resynchronize your positions, pending orders, balance, and trading parameters after the rebase. Unfilled orders will retain their original order IDs, but prices and quantities will be adjusted. The remaining portions of partially filled orders will generate new order IDs after being relisted; please update your local order records promptly. VII. Risk Warning Rebase does not represent additional profits, nor does it grant users ownership of Anthropic shares or securities. Contract prices do not represent Anthropic's official valuation, final IPO price, or post-listing share price. Please manage your positions and margin appropriately before rebase. Market fluctuations may still occur before and after the adjustment; normal risk management rules will still apply after the rebase. Cancelled stop-loss and take-profit orders will not be automatically restored; please reset them promptly after normal trading resumes. Thank you for your understanding and support! Ouyi Team November 11, 2026 Many pages on this website, including but not limited to the Terms of Service, product descriptions, announcements, blogs, and FAQs, are translated using machine translation. Ouyi has made every effort to provide accurate translations, but no machine translation can guarantee complete accuracy. All official texts on this website are in English. While we provide translated documents for user convenience, you understand that such documents may differ from their English versions. Any differences or inconsistencies arising from translation are not binding and have no compliance or enforcement legal effect. If you have any questions about the accuracy of the information contained in the translated documents, please note that the English version is the official version of the document and takes precedence over any translated version. Download the Ouyi App (iOS, Android, macOS, Windows) >>> Follow Ouyi Chinese X (formerly Twitter) >>> Join the Ouyi Chinese Telegram Group >>> Subscribe to the Ouyi Chinese Announcement Channel (Telegram) >>> Join the Ouyi Discord Chinese Community >>> Subscribe to the Ouyi Chinese YouTube Channel >>> Join the Ouyi Web3 Wallet Chinese Telegram Group >>>