Sept 13 (Reuters) - Australian shares rose on Monday as airport operator Sydney Airport Holdings surged after getting a sweetened takeover offer, with firmer energy stocks boosting the benchmark further.

The S&P/ASX 200 index rose 0.3% to 7,427.60 by 0056 GMT.

Sydney Airport Holdings Pty jumped more than 5% to be the top percentage gainer on the benchmark index. The company granted due diligence access to a consortium of infrastructure investors after the group raised its takeover proposal.

Aiding sentiment, Prime Minister Scott Morrison announced that Australia purchased an additional 1 million doses of Moderna's COVID-19 vaccine from the European Union, at a time when the country battles record-high cases.

The ASX 200 energy index rose 1.37%, led by Santos Ltd, up 2.15%, followed by Woodside Petroleum Ltd , gaining 1.66%.

The sub-index tracked oil prices which climbed to a one-week high on concerns over U.S. supplies due to the damage from Hurricane Ida.

The mining index rose 1.26%, led by Ioneer Ltd , up 5.3%. Lynas Rare Earths Ltd followed suit with its 4.79% gain.

Nickel prices had jumped on Friday to their highest in more than seven years due to shortages created by a sharp rise in demand from stainless steel mills and electric vehicle battery makers and sliding stocks.

The gold index rose 0.49%, while technology stocks fell 0.9% .

In New Zealand, the benchmark S&P/NZX 50 index inched 0.15% higher to 13,083.3.

Elsewhere, Japan's Nikkei was down 0.28% at 30298.03 while S&P 500 E-minis futures were up 12.25 points, or 0.27%. (Reporting by Arundhati Dutta in Bengaluru; editing by Uttaresh.V)