# Article 12 — Post-trade transparency obligations (Article 6(1) and Article 20(1) and (2) of Regulation (EU) No 600/2014) **Commission Delegated Regulation (EU) 2017/587 · binding · OJ L 87, 31.3.2017 · dated 14 Jul 2016 [in force]** *In force · Consolidated version of 2 March 2026 · Checked against EUR-Lex on 26 Oct 2026 · [Official source](https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:02017R0587-20260302)* 1. Market operators and investment firms operating a trading venue, and investment firms trading outside a trading venue, shall make public the details of each transaction by applying reference Tables 2, 3 and 4 of Annex I. The field names in Table 3 of Annex I shall be made public using the same naming conventions as specified in the field identifier of that Table. 2. Where a previously published trade report is cancelled, market operators and investment firms operating a trading venue, and investment firms trading outside of a trading venue, shall make public a new trade report which contains all the details of the original trade report and the cancellation flag specified in Table 4 of Annex I. 3. Where a previously published trade report is amended, market operators and investment firms operating a trading venue and investment firms trading outside a trading venue shall make the following information public: **(a)** a new trade report that contains all the details of the original trade report and the cancellation flag specified in Table 4 of Annex I; **(b)** a new trade report that contains all the details of the original trade report with all necessary details corrected and the amendment flag specified in Table 4 of Annex I. 4. Where a transaction between two investment firms is concluded outside the rules of a trading venue, either on own account or on behalf of clients, only the investment firm that sells the financial instrument concerned shall make the transaction public through an APA. 5. [Deleted by [Commission Delegated Regulation (EU) 2025/1246](https://eur-lex.europa.eu/eli/reg_del/2025/1246/oj) of 18 June 2025.] 6. [Deleted by [Commission Delegated Regulation (EU) 2025/1246](https://eur-lex.europa.eu/eli/reg_del/2025/1246/oj) of 18 June 2025.]