How many companies have signed the EU Code of Practice on Transparency of AI-generated Content?

On 24 September 2026 the European Commission's page stated 95 Section 1 signatories (providers: marking and detection) and 192 Section 2 signatories (deployers: labelling). The first list was published on 31 July 2026 with about 190 organisations. The list is updated on an ongoing basis.

Which Lithuanian organisations signed the Code of Practice?

The Commission's list does not state countries. Names matching Lithuanian media brands appear in Section 2: Delfi, UAB; Lrytas; Bernardinai.lt; 15min. Margelis.ai (Rūpestėlis Holding UAB) appears in both Section 1 and Section 2.

Does being a signatory mean a company is compliant with Article 50?

No. It means the company committed to implement the code's measures. Compliance is shown on the content itself: a machine-readable mark, a disclosure where Article 50(4) requires one, and records an authority can check.

MargelisLT

Who signed the EU Code of Practice on Transparency of AI-generated Content, and what did they commit to?

Q: What did signatories of the Code of Practice commit to?

To implement the measures of the section they signed: Section 1 covers marking and detection of AI-generated and manipulated content by providers; Section 2 covers labelling of deepfakes and AI-generated text by deployers. Signatories can rely on the code to demonstrate compliance with Article 50 and take part in the Signatory Taskforces launched from September 2026.

The European Commission publishes the signatory list itself and updates it as new organisations sign. On 24 September 2026 (the date the Commission's page was last updated, and the date we re-checked it) the page states 95 signatories of Section 1 (providers: marking and detection of AI-generated content) and 192 signatories of Section 2 (deployers: labelling of deepfakes and AI-generated text). The first list was published on 31 July 2026 with about 190 organisations, two days before the Article 50 transparency obligations started to apply on 2 August 2026. The code remains open for signature, so the numbers move.

This is an operational summary with primary sources, not legal advice. Signatory counts and names are taken from the Commission's page on the date stated; always confirm against the live list before quoting a number. Last checked 24 September 2026.

What the code is

The Code of Practice on Transparency of AI-generated Content was drawn up by independent experts in a multi-stakeholder process facilitated by the European Commission's AI Office. It supports compliance with Article 50(2), (4) and (5) of the AI Act (Regulation (EU) 2024/1689): machine-readable marking and detection of AI-generated content, and labelling of deepfakes and certain AI-generated text. The Commission and the AI Board have assessed the code as an adequate voluntary tool to demonstrate compliance with those obligations.

Two things are easy to confuse. Adherence to the code is voluntary. The Article 50 obligations themselves are law, in force since 2 August 2026, whether or not a company signs anything.

The two sections, and who can sign each

Section	Who it is for	What it covers	Signatories (24 Sep 2026)
Section 1	Providers of generative AI systems. The Commission also opens it to providers of marking and detection solutions and providers of AI models that help system providers implement the measures.	Rules for marking and detection of AI-generated and manipulated content (Article 50(2)).	95
Section 2	Deployers of generative AI systems, that is companies that use such systems in their own operations.	Rules for labelling of deepfakes and AI-generated and manipulated text (Article 50(4)).	192

Organisations sign the section or sections that apply to them. By our count of the names on the Commission's page, 52 organisations appear in both sections.

Who is on the list

The Commission's own announcement names these examples for Section 1: Aleph Alpha, Anthropic, Black Forest Labs, Cohere, Google, Meta, Microsoft, Mistral, OpenAI and Synthesia. For Section 2 it names Bulgari, Fastweb, Getty Images, Iberdrola, Lenovo and Lufthansa. The Commission also states that about half of the signatories are small and recent companies, across IT, telecom, education and retail.

The list does not state each signatory's country. Entries whose names match brands familiar to Lithuanian readers appear in Section 2: Delfi, UAB; Lrytas; Bernardinai.lt; 15min. Margelis.ai (Rūpestėlis Holding UAB), the operator of this site, is listed in both Section 1 and Section 2.

Source for every name and number above: the Commission's page Strong backing for the Code of Practice on Transparency of AI-generated Content, section "List of signatories of the code", last update 24 September 2026.

What a signatory commits to

To implement the measures of the section it signed. For Section 1 that means the code's rules on marking output in a machine-readable, detectable way and supporting detection. For Section 2 it means the rules on labelling deepfakes and AI-generated text in the cases Article 50(4) defines.
To be able to demonstrate compliance through the code. The Commission states that signatories can rely on the code's measures to demonstrate compliance with the Article 50 rules. Providers and deployers that comply through other means must show that those means are adequate, and that is assessed individually by the market surveillance authorities of each Member State.
To take part in the Signatory Taskforces, launched from September 2026, which share implementation practice and feed back on the transparency measures.
To signal, publicly, an intention to promote public trust in AI and to mitigate deception and misinformation. That is the Commission's wording, and it is the reputational part of the commitment: a signatory whose output is later found unmarked has a public statement to answer for.

What signing does not do: it does not certify anything, it does not replace the AI Act or the Commission's Article 50 guidelines, and it does not by itself prove that a single piece of content was marked. That proof has to exist on the content.

How to check the list yourself

Open the Commission's page: digital-strategy.ec.europa.eu › Strong backing for the Code of Practice.
Scroll to "List of signatories of the code". The table has two columns: Section 1 on the left, Section 2 on the right.
Use your browser's find function (Ctrl+F or Cmd+F) with the organisation's name. A name that appears in both columns signed both sections.
Note the "Last update" date at the bottom of the page. Counts you quote should carry that date.

What we did after signing, and how to check it

Rūpestėlis Holding UAB signed both sections. Signing does not change what is implemented, so we publish our implementation status in the form a reviewer expects: system inventory, per-obligation status, and dated remediation for what is not yet done, including the fact that we do not embed C2PA credentials for text output.

Every AI-assisted item we publish carries a signed receipt. The receipt holds the text, its sources, a timestamp and an Ed25519 signature. Open the registry, take any entry, and verify it has not been altered.

Registry: margelis.ai/verify · Implementation status: margelis.ai/our-article-50-posture.html

Open the Article 50 checklist — 16 checks, no sign-up

Frequently asked questions

Is signing the Code of Practice mandatory?: No. The code is voluntary. The Article 50 transparency obligations are mandatory from 2 August 2026 regardless. Signing gives a recognised way to demonstrate compliance; not signing means demonstrating adequacy of your own measures to the market surveillance authority.
Does being a signatory mean a company is compliant?: No. It means the company committed to implement the code's measures for its section. Compliance is shown on the content itself: a machine-readable mark, a disclosure where Article 50(4) requires one, and records an authority can check.
How many companies have signed?: On 24 September 2026 the Commission's page stated 95 Section 1 signatories and 192 Section 2 signatories. The list is updated on an ongoing basis, so re-check the page before quoting a figure.
Can a small company sign?: Yes. The Commission states that about half of the signatories are small and recent companies. The code is open for signature; the AI Office encourages providers and developers of generative AI systems to sign.
Which Lithuanian organisations signed?: The list does not state countries. Names matching Lithuanian media brands appear in Section 2: Delfi, UAB; Lrytas; Bernardinai.lt; 15min. Margelis.ai (Rūpestėlis Holding UAB) appears in both Section 1 and Section 2.

Sources

European Commission — Strong backing for the Code of Practice on Transparency of AI-generated Content: announcement of 31 July 2026 and the live signatory list (last update 24 September 2026).
European Commission — Code of Practice on Transparency of AI-generated Content: what the code is, the two sections, the assessment by the Commission and the AI Board, the code text (PDF) and the EU labelling icons.
Regulation (EU) 2024/1689 (AI Act) — EUR-Lex: Article 50.
EU AI Act Service Desk.

Margelis.ai is operated by Rūpestėlis Holding UAB (Vilnius, Lithuania). This page was prepared with AI assistance and reviewed by a human; its publication receipt is in the registry. Related: Article 50 marking and proof · AI Act in Lithuania · checklist · lietuviškai.