The option series is ASX:OKUO, exercisable at $0.125 with an expiry date of 30 June 2017.
Fotios total indirect interest includes 4.2 million shares across two holdings, 1 million unlisted options, and the newly acquired listed options.
Oklo is well-funded with over $7 million in cash which supports its aggressive gold drilling program in Mali.
The company is focused on the Dandoko project, with drilling highlights from the Diabarou prospect including: 29 metres at 10.42g/t gold; and 6 metres at 53.77g/t gold.
The project is located in a region which hosts multi-million ounce mines.