X0303 4 2010-08-18 0 0000061398 MAGELLAN PETROLEUM CORP /DE/ MPET 0001468730 bogachev nikolay v 9-3 SECHNEOVSKY PEREULOK MOSCOW 1Z RUS-119034 RUSSIAN FEDERATION 1 0 0 0 Common Stock 2010-08-18 4 S 0 5723 1.7905 D 14477553 I Held by ECP Fund, SICAV-FIS Common Stock 2010-08-23 4 S 0 53361 1.6873 D 14477553 I Held by ECP Fund, SICAV-FIS Common Stock 15000 D On August 18, 2010, ECP Fund, SICAV-FIS (the "ECP Fund") (formerly known as YEP I, SICAV-FIS) sold an aggregate of 9,460 shares of the issuer's common stock pursuant to Rule 144. On the date of sale, the reporting person indirectly held a 60.5% equity interest in the ECP Fund. Accordingly, the reporting person's pecuniary interest in the issuer's shares held by the ECP Fund decreased proportionately by 5,723 shares. Following these sales by the ECP Fund, the reporting person beneficially owns 15,000 shares of the issuer's common stock directly and an aggregate of 14,477,553 shares of the issuer's common stock indirectly, of which 13,612,463 shares are held by Young Energy Prize S.A. and 865,090 shares are held by the ECP Fund. On August 23,2010, the ECP Fund sold an additional 88,200 shares of the issuer's common stock pursuant to Rule 144. On the date of sale, the reporting person indirectly held a 60.5% equity interest in the ECP Fund. Accordingly, the reporting person's pecuniary interest in the issuer's shares held by the ECP Fund decreased proportionately by 53,361 shares. /s/ Nikolay V. Bogachev 2010-08-25