Due to announcement of shares buy-back, The Company publishes Invitation To Submit Offers For The Sale Of The Shares In Polskie Górnictwo Naftowe i Gazownictwo S.A. The full text of the Invitation is available at Investor Relations / Stock information / PGNiG's shares buy-back or directly at http://en.pgnig.pl/pgnig-s-shares-buy-back