MiFIR transparency from 2 March 2026: what London trading books must have live

MiFIR transparency from 2 March 2026: what London trading books must have live

On 27 February 2026 ESMA published the annual transparency calculations for equity and equity-like instruments and recalled that “the application of the remaining revised rules on transparency of equity and equity-like financial instruments included in RTS 1 are applicable from 2 March 2026.” That go-live hits EU trading venues, systematic internalisers and investment firms — including London groups’ EU entities — in shares, depositary receipts, ETFs, certificates and similar. The calculations themselves apply from 6 April 2026 until 4 April 2027; the next annual set is to be published by 1 March 2027 and becomes applicable from 5 April 2027.

Why operational teams should care

Two clocks sit on the same ESMA page. Do not merge them.

2 March 2026 is the application date for the remaining revised RTS 1 rules on transparency of equity and equity-like financial instruments. If your EU book quotes, trades or SI-prints shares, DRs, ETFs, certificates or similar, the revised RTS 1 remainder must already be in the venue/SI rulebook, the pre- and post-trade flags, and the tick-size and large-in-scale logic those rules drive.

6 April 2026 – 4 April 2027 is the application window for the annual equity transparency calculations published on 27 February 2026. Those calculations cover the liquidity assessment (Articles 1 to 5 of CDR 2017/567), most relevant market in terms of liquidity (Article 4 of CDR 2017/587 / RTS 1), average daily turnover for pre- and post-trade large-in-scale thresholds, average value of transactions and the related standard market size, and average daily number of transactions on the most relevant market for the tick-size regime.

Bond, structured-finance-product and emission-allowance transparency under the RTS 2 review is a different workstream. This post’s locked date is the RTS 1 remainder on 2 March 2026 plus the 6 April 2026 equity calculations. Do not collapse bond/RTS 2 application language into 2 March.

T+1 is related later market-structure context only. ESMA’s 20 July 2026 statement records first deadline 7 December 2026 (allocations and confirmations) and final 11 October 2027. As of that 20 July statement, Commission amendments to CDR (EU) 2018/1229 “currently are under scrutiny by the European Parliament and the Council.” Do not treat 7 December 2026 as already in force.

MiFIR equity transparency requirements by business type

Business type What is in scope What to do now
EU trading venues of London groups Remaining revised RTS 1 equity/equity-like transparency from 2 March 2026; annual calculations from 6 April 2026 Confirm rulebook, publication and tick-size tables applied the RTS 1 remainder on 2 March. Load FITRS for 6 April.
Systematic internalisers in shares, DRs, ETFs, certificates and similar Same RTS 1 remainder and SMS / LIS / liquidity outcomes from the annual calculations Check SI quote obligations, SMS and LIS against the 27 February calculations before 6 April.
EU investment firms dealing on own account or for clients Pre- and post-trade transparency on equity and equity-like instruments where RTS 1 applies Confirm OMS/EMS flags to APA/venue. Reconcile new ISINs to FITRS daily.
London-book / UK-only desks Not this 2 March EU RTS 1 remainder unless the trade is through an EU venue, SI or EU firm Split the blotter: EU-scope vs UK-scope.
Bond / SFP / emission-allowance desks Not locked to 2 March 2026 on the ESMA page used here Keep RTS 2 on its own tracker. Do not diary 2 March as a bond go-live from this file.
Settlement / middle office (T+1, related later) Allocations/confirmations 7 December 2026; T+1 11 October 2027 — still in preparation as of 20 July 2026 Separate workstream. Commission act still under EP/Council scrutiny as of 20 July 2026.

Operational tip: ESMA invites market participants to monitor FITRS daily for newly traded instruments and for the four-week calculations that apply after the first six weeks of trading. A 27 February annual file is not a set-and-forget extract.

Step-by-step: initial project plan

Step Action What operational staff must deliver Official reference
1 Prove 2 March 2026 RTS 1 remainder is live Sign-off that venue/SI/firm systems applied the remaining revised equity/equity-like RTS 1 rules on 2 March ESMA 27/02/2026: remaining revised RTS 1 rules “applicable from 2 March 2026”
2 Load the 27 February calculations FITRS XML (publication date from 27 February 2026) plus Register extract: liquidity, MRM, ADT, AVT/SMS, ADNT Same ESMA page; FITRS / Register
3 Cut over thresholds on 6 April 2026 LIS, SMS, tick-size and liquidity-status tables using the new calculations from 6 April 2026 to 4 April 2027 ESMA: calculations apply 6 April 2026–4 April 2027
4 Switch on daily new-instrument monitoring Owner and job that pulls FITRS daily; four-week process after six weeks of trading ESMA: monitor “on a daily basis”
5 Split equity RTS 1 from bond/RTS 2 Written scope note: this go-live is equity and equity-like RTS 1 remainder only ESMA locked sentence is RTS 1 equity/equity-like
6 Keep T+1 on a later tracker Separate plan for allocations/confirmations (guidelines “should apply from 7 December 2026”) and T+1 (11 October 2027) ESMA T+1 news 20/07/2026; statement PDF; 26/05/2026 allocations CP
7 Diary the next equity calculation cycle Next annual calculations “published by 1 March 2027 … applicable from 5 April 2027” ESMA 27/02/2026 next-steps paragraph

Practical checklist for operational teams

  • 2 March vs 6 April — RTS 1 remainder is already live. Annual calculation values land on 6 April. Show each date separately.
  • Instrument coverage — Shares, DRs, ETFs, certificates and similar. If the ISIN is not equity or equity-like, it is not this go-live.
  • FITRS files — XML with publication date from 27 February 2026 and the Register web interface. Keep extract, load log and exceptions.
  • Daily delta — New ISINs and four-week calculations after six weeks of trading. Owner on the market-data desk.
  • UK vs EU blotter — Tag the executing entity. An EU SI print is in; a UK-only print is not this RTS 1 remainder.
  • T+1 is not this release — Related later: 7 December 2026 allocations/confirmations; 11 October 2027 T+1. As of 20 July 2026 the Commission act was still under scrutiny. Use the CSDR T+1 Readiness Diagnostic for that workstream only.

Common operational pitfalls

  • Saying “all MiFID/MiFIR transparency from March 2026”. ESMA’s locked sentence is the remaining revised RTS 1 rules for equity and equity-like instruments.
  • Collapsing bond, SFP or emission-allowance (RTS 2) application into 2 March 2026. That date is not locked here.
  • Loading the 27 February calculations as if they applied on 2 March. They apply from 6 April 2026.
  • Treating 7 December 2026 T+1 allocations as already in force. On 20 July 2026 ESMA said the delegated act was still under EP/Council scrutiny.
  • Citing EUR-Lex for CDR (EU) 2025/1246. That endpoint is not locked. The 2 March 2026 date is locked from ESMA’s 200 page.
  • Forgetting the next cycle: published by 1 March 2027, applicable from 5 April 2027.

How GRT Consulting can help

GRT Consulting supports operational teams with RTS 1 remainder go-live evidence against 2 March 2026, FITRS load and 6 April cut-over, and a clean split between equity RTS 1, any later RTS 2 work, and T+1 preparation.

For T+1 preparation only, use the free CSDR T+1 Readiness Diagnostic. For a trading-book review: T: +44 20 3695 9251 E: info@grtconsult.com Web: grtconsult.com


Sources

.., 4th March 2026

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