Answer
Article 13 TEU: European Parliament, European Council, Council of the EU, European Commission, Court of Justice of the EU, European Central Bank, and Court of Auditors.
💡Bodies and agencies (e.g. EESC, EIB, the decentralised agencies) are NOT institutions in this sense.
Consolidated TEU (EUR-Lex) — eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:12016M/TXT