Adds background on IPO market, company revenue from paragraph 6

FRANKFURT, June 6 (Reuters) - German online car parts retailer Autodoc intends to list on the Frankfurt Stock Exchange via a secondary share sale, a bookrunner on the initial public offering said on Friday.

The Berlin-headquartered company's founders and the U.S. private equity firm Apollo Global Management will sell shares in the IPO but the size of the offering has yet to be set.

According to the bookrunner's document seen by Reuters, the offer structure is 100% secondary, indicating that the company will not receive any additional equity capital from new shares.

The retailer, founded in Berlin in 2008, is active in 27 European countries. It mainly sells to consumers, but it is increasingly targeting business clients, the document said.

Citi C.N, Barclays BARC.L, Deutsche Bank DBKGn.DE and Jefferies JEF.N have been mandated as joint global coordinators, according to the document.

The "intention to float" statement comes despite volatile stock markets, which have been buffeted by the risk of global disputes over tariffs that have scuppered a raft of recent listing plans.

Metals investor Cobalt Holdings suspended London IPO plans on Wednesday, declining to specify the reasons. That was after Germany's 1Komma5 Grad, a renewable-energy systems provider, and Swedish fintech Klarna in April put U.S. listing plans on hold.

In March, German pharmaceuticals company Stada postponed an IPO in Frankfurt.

According to Autodoc's website, the seller of vehicle parts and accessories had 2024 revenues of 1.56 billion euros ($1.78 billion), with average annual growth of 25% since 2018.

($1 = 0.8763 euros)

(Reporting by DhanushVignesh Babu in Bengaluru and Ludwig Burger in FrankfurtEditing by Rashmi Aich, Miranda Murray and Frances Kerry)

((DhanushVignesh.Babu@thomsonreuters.com;))