Green energy supplier Ecotricity bought shares in one of its rival firms in March this year.
It acquired 6.82% of Good Energy’s shares.
The transaction made it the second largest shareholder in Good Energy.
In a statement, Good Energy said: “Good Energy Group is rated as a ‘buy’ by the four analysts that follow Good Energy – Cantor Fitzgerald, Investec, Alpha Deal Group and Arden – so it doesn’t surprise us that investors are buying shares. Ecotricity has had a shareholding in Good Energy on previous occasions.”
Earlier this month, Good Energy announced it will offer more shares to the public as part of its efforts to grow.