PARIS, May 6 (Reuters) - Czech billionaire Daniel Kretinsky, French investor David Layani, and a consortium of banks have all filed bids to restructure the debt of French IT company Atos, it said on Monday, adding it had already rejected an offer from Bain Capital.

Once a celebrated flagship technology company included in the bluechip CAC-40 share index, Atos grew quickly through acquisitions but later made a series of strategic mistakes against a backdrop of unstable governance.

The company said in a statement issued before the Paris stock exchange opened that it would decide which offer to pursue by the end of the month, while also negotiating the planned takeover of its cybersecurity, military communication and supercomputing assets by the French state.

Atos shares rose briefly before reversing course to stand around 2% lower at 0827 GMT.

The company confirmed that an agreement for an emergency 100 million euro ($107.64 million) credit facility had been signed with some of its creditors, while talks with banks and the state to provide another 350 million euros were progressing.

Atos, which hosts sensitive data for the Paris 2024 Summer Olympics, has said it needs 1.1 billion euros in total to finance its business over 2024-2025.

KRETISNKY VS LAYANI

As Atos's largest shareholder with around an 11% stake, tech investor David Layani wants to tighten his grip on the company and become its next boss, with his pitch centred on keeping Atos under French control.

According to the offer posted on Atos's website, Layani's investment fund Onepoint and its financial partner Butler Industries would inject 350 million euros in cash in exchange for 'a minimum' of 35% of the firm's shares and voting rights.

The offer would allow for a total new capital injection of up to 500 million euros.

Deep-pocketed Kretinsky, who recently took over French supermarket chain Casino in a similar debt restructuring deal, has teamed up with investment fund Attestor, offering to inject 600 million euros in equity and provide a total of 1.3 billion euros in financing over five years.

A third bid from Atos's main bondholders and bank creditors offers 1.2 billion euros in new money through bonds and guarantees as well as the conversion of current debt worth 1.8 billion euros into equity.

Any restructuring "probably implies radical changes in the capital structure of the company and a significant issuing of new shares that will lead to a massive dilution of existing shareholders", Atos said. ($1 = 0.9290 euros) (Reporting by Tassilo Hummel, Editing by GV De Clercq, Kirsten Donovan)