BRUSSELS, April 25 Reuters Five Alphabet subsidiaries, two Meta Platforms units, two Microsoft businesses, Twitter and Alibaba39;s AliExpress are among 19 companies subject to landmark EU online content rules, EU industry chief Thierry Breton said on Tuesday.

The rules known as the Digital Services Act DSA require the companies to do risk management, conduct external and independent auditing, share data with authorities and researchers and adopt a code of conduct by August.

The 19 companies include Alphabet39;s Google Maps, Google Play, Google Search, Google Shopping and YouTube, Meta39;s Facebook and Instagram, Amazon39;s Marketplace and Apple39;s App Store.

The others are Microsoft39;s two units Linkedin and Bing, booking.com, Pinterest, Snap Inc39;s Snapchat, TikTok, Twitter, Wikipedia, Zalando and Alibaba39;s AliExpress.

We consider these 19 online platforms and search engines have become systematically relevant and have special responsibilities to make the internet safer, Breton told reporters.

The companies will have to do more to tackle disinformation, give more protection and choice to users and ensure stronger protection for children or risk fines as much as 6 of their global turnover.

Breton said he was checking to see whether another four to five companies fall under the DSA, with a decision expected in the next few weeks.

Breton singled out Facebook39;s content moderation system for criticism because of its role in building opinions on key issues….