OneClearstream rollout documentation

The OneClearstream service rollout related client documentation can be found consolidated on this page by topic and market.

Further documentation will be added as more market links are activated.

Clients can obtain details on specific T2S In-CSD securities accepted in OneClearstream by means of a simple query via the Clearstream Codelist - Securities Database.

For Local Market Partner (LMP)-specific search criteria please refer to Announcement C20056.

OneClearstream service description

Clients with CEU CASCADE accounts should refer to:

• The OneClearstream Client Handbook that describes the OneClearstream asset servicing processes for clients of Clearstream Europe AG using the OneClearstream service.
• The  document that describes the OneClearstream asset servicing processes for CEU as the Issuer-CSD. 
  Note: As part of the Corporate Action Harmonisation (CAH) Project Phase 1 as of 3 July 2023, asset servicing for CEU-issued securities has been upgraded to OneClearstream Asset Servicing level (CAH – KADI DE migration to OneCAS) and is mandatory for all clients with CEU, 6-series and CBL accounts. This applies only to migrated CEU-issued securities and respective events. 
  In Phase 2, as of 1 July 2024, asset servicing for CEU-issued securities that are investment funds, individual certificates, non-DE taxable country or non-T2S eligible will be upgraded to OneClearstream Asset Servicing (OneCAS) level (CAH Project KADI DE funds migration Phase 2 to OneCAS) and will become mandatory. For details, clients should refer to the respective announcements and Detailed Functional Specifications which are provided below in the market-specific migration information for the German market.

Clients with CBL or 6-series accounts are informed about the changes to the existing services via Release information and dedicated announcements. 

Subscription forms

• U

Xact Web Portal documentation

Documentation and video tutorials can be found on the Xact Web Portal documentation page.

Market-specific migration information

Slovenia – OneClearstream service activation for Klirinško depotna družba d.d. (KDD)

Activation completed: 25 November 2024

The service has been activated for securities issued by KDD. Hence, all Slovenian securities will be eligible in Clearstream Europe AG (CEU) and LuxCSD S.A. All Slovenian ISINs will receive NCSC-T status in T2S for CEU.

Ireland – OneClearstream service activation for Euroclear Bank

Activation cpmpleted: 25 November 2024

The OneClearstream service has been activated for Irish securities issued by Euroclear Bank and therefore those securities will be eligible in Clearstream Europe AG (CEU) and LuxCSD S.A for settlement in CEU-T2S with the Non-Collective Safe Custody (NCSC-T) status.

Slovak Republic – OneClearstream service activation for Centrálny depozitár cenných papierov SR (CDCP)

Activation date: 18 March 2024

The OneClearstream service will be activated for securities issued by CDCP. Hence, all Slovak securities will be eligible in Clearstream Europe AG (CEU) and LuxCSD S.A. All Slovak ISINs will receive NCSC-T status in T2S for CEU.

Finland – OneClearstream service activation for Euroclear Finland

Activation completed (27 November 2023)

The OneClearstream service will be activated for securities issued by Euroclear Finland (EFi). Hence, all Finnish securities will be eligible in Clearstream Europe AG (CEU) and LuxCSD S.A. All Finnish ISINs will receive collective safe custody (CSC) status.

Clearstream will continue to access the Finnish market via Clearstream Banking S.A.'s (CBL's) direct link to Euroclear Finland.

Germany – Mandatory asset servicing upgrade to OneClearstream asset servicing level (CAH – KADI DE migration to OneCAS)

CAH Project Phase 1 completed (3 July 2023)

CAH Project Phase 2 planned for 1 July 2024

Eurobonds – activation completed

Activation date Step 1: 22 March 2021

Activation date Step 2: 19 April 2021