# Article 18 — Methodology for calculating the amount of the revenue to be redistributed to eligible data contributors meeting the criterion under Article 27h(6), point (a), of Regulation (EU) No 600/2014 (Article 27h(6), point (a), (7), point (a), and (8), points (a) and (b), of Regulation (EU) No 600/2014) **Commission Delegated Regulation (EU) 2025/1155 · binding · OJ L, 2025/1155, 3.11.2025 · dated 12 Jun 2025 [in force]** *In force · Commission Delegated Regulation (EU) 2025/1155, OJ L, 2025/1155, 3.11.2025 · Checked against EUR-Lex on 26 Oct 2026 · [Official source](https://eur-lex.europa.eu/eli/reg_del/2025/1155/oj/eng)* 1. To calculate the amount of the revenue to be redistributed to eligible data contributors that meet the criterion under Article 27h(6), point (a), of Regulation (EU) No 600/2014, the CTP for shares and ETFs shall determine the total annual trading volume generated in shares for each eligible data contributor that is a regulated market or an SME growth market by summing each transaction record received by that data contributor. 1. The CTP for shares and ETFs shall determine the total annual trading volume in shares in the Union by summing all transaction records received by all data contributors. 1. For the purposes of the calculations referred to in paragraphs 1 and 2, transactions shall be single counted. 1. To determine whether an eligible data contributor meets the criterion laid down in Article 27h(6), point (a), of Regulation (EU) No 600/2014, the CTP for shares and ETFs shall divide the amount determined under paragraph 1 by the amount determined under paragraph 2 for each regulated market and SME growth market, identified by operating Market Identifier Code (‘MIC’), as specified in ISO 10383. 1. For each eligible data contributor meeting the criterion laid down in Article 27h(6), point (a), of Regulation (EU) No 600/2014, identified by segment MIC, as specified in ISO 10383, or by operating MIC, whenever there is no segment MIC, the CTP for shares and ETFs shall multiply the relevant trading volume generated by that MIC, as determined under paragraph 1, by a weighting of 4,5.