---
title: "Athens Exchange Group Finalizes Technical Design of Onchain Order Book"
description: "Athens Exchange Group and Mysten Labs finalize technical design for an onchain fundraising platform, begin development with zero-knowledge proof integration."
author: "Sui Foundation"
datePublished: 2025-04-16
dateModified: 2026-07-16
category: "Developer Resources"
readTime: "1 min"
canonical: https://www.sui.io/blog/athex-onchain-order-book-design
---

# Athens Exchange Group Finalizes Technical Design of Onchain Order Book

Following the [initial partnership announcement](https://blog.sui.io/athex-greek-stock-exchange-evaluates-sui/) on March 6, 2024, [Athens Exchange Group](https://www.athexgroup.gr/?ref=blog.sui.io) (ATHEX) and [Mysten Labs](https://mystenlabs.com/?ref=blog.sui.io) announced the successful completion of the technical design and business requirements for upgrading ATHEX’s Electronic Book Building (EBB) platform to leverage Sui, the Layer 1 smart contract platform.

Building on the collaborative foundation established last year, the next phase of the partnership will incorporate a novel zero-knowledge proof (ZKP) mechanism into EBB’s bidding process, ensuring that participants can submit confidential bids with enhanced privacy and security, while still meeting the transparency and auditability standards of a regulated marketplace.

In parallel, ATHEX and Mysten Labs teams commenced development of a proof of concept (PoC) that will serve as a significant milestone toward creating the first fully onchain order book for a stock exchange. By integrating Sui’s powerful architecture and developer-friendly tooling, the upgraded EBB will operate seamlessly at scale, setting a new benchmark for regulated exchanges.

“We are excited to take this important step toward leveraging cutting-edge blockchain and cryptographic technology to create an enhanced capital raising product based on EBB,” said Nikos Porfyris, Chief Operating Officer at Athens Exchange Group. “By integrating zero-knowledge proofs, we aim to uphold the highest standards of compliance and data integrity while boosting operational efficiency for all market participants.”

“The focus on privacy-preserving mechanisms, combined with Sui’s unparalleled speed and security, will enable us to build a state-of-the-art PoC that can evolve into a full-fledged onchain order book, setting a new benchmark for the industry,” said Dr. Kostas Kryptos Chalkias, Chief Cryptographer and Co-Founder of Mysten Labs.