Inquiries conducted by the European Ombudsman in 2023 concerned the following institutions

Inquiries	Own initiative Inquiries*	398 inquiries opened (393 + 5 OIs included)
247	3*	European Commission	250	62.81%
46	1	European Personnel Selection Office	47	11.81%
15	1*	European Parliament	16	4.02%
10	1	Frontex	11	2.76%
7		European Anti-Fraud Office	7	1.76%
6	1*	Council of the European Union	7	1.76%
6		European Data Protection Supervisor	6	1.51%
6		European External Action Service	6	1.51%
5		European Union Intellectual Property Office	5	1.26%
33		Other EU Agencies (1)	33	8.27%
12		Other EU Institutions or bodies (2)	12	3.01%

(1) Including Europol (4), EMA (4), EACEA (3), EASO (3), FRA (2), EEA (2), HaDEA (2), EDA (1), ESMA (1), REA (1), ERA (1), eu-LISA (1), EBA (1), BEREC (1), EASA (1), EUISS (1), CINEA (1), CdT (1), EFCA (1) and EFSA (1).

(2) Including EIB (4), CJEU (3), EDPD (2), KDT-JU (1), EESC (1), and ECB (1).

*Of the five own-initiative inquiries opened, one (OI/4/2023MIK) concerns three different institutions: Council of the EU, EC and EP.