Boerse Stuttgart Expands Seturion Settlement Network

Societe Generale, its digital-assets subsidiary SG-FORGE, and retail broker flatexDEGIRO joined Boerse Stuttgart Group's Seturion settlement platform on May 21, 2026, adding two of Europe's most active capital-markets institutions to a blockchain-based post-trade network that already counts Nasdaq among its partners. The additions bring structured-product issuance capacity and retail order flow into a single settlement layer that Boerse Stuttgart unveiled as a pan-European tokenized settlement system designed to cut settlement costs by up to 90%.

Under the arrangement, Societe Generale plans to issue tokenized structured securities — specifically turbo warrants and investment certificates — through Seturion, with those products expected to trade on European venues connected to the platform. SG-FORGE, the Societe Generale subsidiary dedicated to digital assets, will supply EURCV and USDCV stablecoins to serve as the cash leg of settlement activity on the network. SG-FORGE has executed tokenized issuances in Europe since 2019, and the unit previously completed Societe Generale's first digital bond issuance in the United States using Broadridge Financial Solutions' tokenization capability on the Canton Network blockchain.

flatexDEGIRO's participation introduces a different dimension: retail distribution at scale. The broker serves more than 3.5 million customers across 16 countries and processed more than 75 million securities transactions in 2025. Connecting that flow to Seturion would route a significant volume of European retail order activity through blockchain-based settlement infrastructure, a step that most post-trade modernisation efforts have not yet attempted at comparable scale.

Seturion supports all asset classes across public and private distributed ledger technology networks, as well as cash settlement against central bank money and on-chain cash. The platform is already operational at BX Digital, Switzerland's FINMA-regulated DLT trading facility, and was tested in the European Central Bank's blockchain trials with leading European banks in 2024. A licence application under the EU's DLT Pilot Regime has been filed with Germany's financial regulator BaFin. Boerse Stuttgart Group, the sixth-largest exchange group in Europe, operates exchanges in Germany, Sweden, and Switzerland — the Stuttgart Stock Exchange, the Nordic Growth Market, and BX Swiss — and counts 230 institutional clients across 2.3 million tradeable securities.

The Societe Generale and flatexDEGIRO additions follow a strategic partnership Nasdaq announced with Seturion, under which Nasdaq's European trading venues will connect to Seturion to facilitate trading and settlement of tokenized securities, with an initial focus on structured products. That agreement positioned Seturion as a multi-venue settlement hub rather than a captive infrastructure for Boerse Stuttgart's own exchanges. The May 21 additions accelerate that network-building by attaching a major issuer, a stablecoin provider, and a high-volume retail broker simultaneously.

The commercial logic for all parties is partly regulatory. European securities trades currently settle under the T+2 standard — two business days after execution. Blockchain-based settlement can compress that window materially, and the Seturion partnership structure is designed to handle transactions across multiple jurisdictions simultaneously. For SG-FORGE, providing the stablecoin settlement layer gives the unit a recurring infrastructure role rather than a one-off issuance mandate. For flatexDEGIRO, connecting to Seturion would allow the broker to offer tokenized securities to its existing client base without building separate custody or settlement infrastructure.

Several material details were not disclosed in the May 21 announcement. The parties have not identified specific turbo warrant or investment certificate programmes with launch dates, notional sizes, or named underlying assets. The announcement does not specify which of Seturion's public or private DLT networks will host Societe Generale's initial issuances, nor does it state the technical integration timeline for flatexDEGIRO's order flow. The stablecoin settlement mechanism — including whether EURCV or USDCV will be used for euro-denominated structured products, the counterparty holding arrangements, or the redemption mechanics under stress conditions — has not been detailed publicly.

What the announcement establishes concretely is that Seturion has signed three additional institutional participants — an issuer, a stablecoin provider, and a retail broker — onto its network ahead of a pending BaFin licence decision under the EU's DLT Pilot Regime. It does not establish that tokenized structured products are live on the platform, that flatexDEGIRO's retail clients can currently trade or settle tokenized securities through Seturion, or that the stablecoin settlement layer has been tested in production at the volumes flatexDEGIRO's transaction history would imply.