Dear OSL HK Clients,

We are thrilled to announce the new listing of trading pairs: USDGO/USD, USDGO/USDC, USDGO/USDT. The trading pairs are available on Pro Trade for Professional Investors Only.

Listing Schedule:

• Deposit and Withdrawal Open: Opened

• Listing Time: 2026-04-29 9:00(UTC+8)

• Trading Pairs (Pro Trade): USDGO/USD, USDGO/USDC, USDGO/USDT

• Supported User Type: Professional Investors Only

USDGO deposits and withdrawals will be available via Solana.

Note: For trading rules of new pair listing, please refer to "Trading Rules" for more information.

About USDGO(USDGO)

USDGO is a US dollar stablecoin that operates under the framework of the GENIUS Act, is federally regulated, audited by third parties, and fully complies with the highest standards of Anti Money Laundering (AML) and Know Your Customer (KYC) requirements. It is backed by high-quality Current Assets, including US Treasury bonds, with a 1:1 collateral. USDGO is published by Anchorage Digital Bank and operated by OSL Group as its brand operator.With its enterprise-level services, USDGO aims to connect the Web3 industry with traditional finance through on-chain operations, becoming a compliance liquidity management and settlement tool. Through compliance payment channels, efficient enterprise treasury management, and diverse digital asset channels, USDGO can assist enterprises in coordinating global funds and is committed to empowering the real economy in the long run.

Learn more about USDGO: Website | Whitepaper | Github

OSL Digital Securities Limited

2026-04-29

Disclaimer

This content is provided by OSL Digital Securities Limited (“OSLDS”) solely for informational purposes and does not constitute, nor shall it be construed as, an offer, solicitation, or recommendation to purchase, sell, or subscribe to any securities, financial instruments, products, or services. This content does not constitute legal, tax, accounting, or financial advice, and recipients are advised to obtain independent professional advice prior to making any decisions or taking any action. OSLDS makes no representations or warranties, express or implied, as to the accuracy, completeness, or reliability of the information contained herein and disclaims all liability for any losses or damages arising from its use. Where third-party data or information is referenced, OSLDS makes no representation or endorsement as to the accuracy, completeness, or reliability of such data. All opinions, estimates, and information are as of the date hereof and may be subject to change without notice.

<For the avoidance of doubt, this announcement is strictly intended for Professional Investors (as defined under the Securities and Futures Ordinance (Cap. 571) and its subsidiary legislation) and is not intended for distribution to, or use by, any person in any jurisdiction where such distribution or use would be contrary to applicable laws or regulations. It is the responsibility of any person who accesses this announcement to observe all applicable laws and regulations of their relevant jurisdiction.> Virtual assets involve significant risks. Please ensure you fully understand these risks before engaging in any trading activities. OSLDS shall not be liable for any losses arising from the use of or reliance on this announcement.

About OSL Hong Kong

As a subsidiary of the publicly listed OSL Group (HKEX: 863.HK), OSL Digital Securities Limited ("OSL Hong Kong") is Hong Kong’s first and most established SFC-licensed and insured digital asset platform. Operating since 2018, the platform provides institutional-grade digital asset services to corporations, financial institutions, professional investors and retail investors. OSL Hong Kong delivers services across five core domains: OTC brokerage, Omnibus broker solutions, custody, wealth management, and retail services. The OTC brokerage services provide 24/7 high-liquidity crypto trading with fiat on/off-ramp services. Custody solutions feature client-asset segregated wallet management backed by US$1 billion insurance coverage. The wealth management suite offers crypto investments to traditional investors, including tokenised treasuries, RWAs, structured crypto products, and quant investment strategies. Retail services bring institution-grade security and crypto access to professional and retail investors. As a pioneer in bridging traditional finance and the digital asset economy, OSL Group adheres to its core concept: Open, Secure, and Licensed, empowering the next generation of global financial infrastructure. In addition to Hong Kong, OSL Group expands operations under full regulatory compliance in Japan, Australia, Europe and beyond.