With just three weeks to go to the end of the competition, Loreto College in Coleraine has soared up the table to top spot at the end of week 13 of the Investec Wealth and Investment/Business Telegraph School Share Race.
Their lead is just under £900, with their portfolio of investments rising by an impressive 6% over the course of another positive week's trading on the London Stock Market. The FTSE 350 index of leading companies rose by almost 2%, thereby continuing its mostly positive start to the year.
St Mark's High School, Warrenpoint, however, did even better over the course of the week, with a 7.2% increase in the value of their portfolio.
They move into second, just ahead of last week's leaders Belfast High School, who slip down to third.
Best performance of the week went to Cookstown High School. The team's investments were 7.8% higher and they moved up 10 places from bottom position last week as a result.
The competition now enters its critical final phase, where money can be won and lost in the final weeks of competing.
Schools have had a final opportunity to make changes to their portfolios at the end of January, no doubt hoping to see a rally in prices before the competition comes to a close on Friday, February 10.
The winners will receive £500 in gift vouchers as a prize.