International Baccalaureate students at the Anglo-Chinese School (Independent) received their results from the school at noon on Monday.
Of the school's 457 students who took the exam, 32 attained the perfect score of 45 points, slightly less than the 37 students who did just as well in 2012.
The school's average score was 41.54 points, and 81.2 per cent - or 371 students - obtained 40 or more points.
In total, Singapore had 43 candidates who achieved the maximum score of 45 points and the average score was 36.53 points. Globally, the average score was 29.95 points with 221 students achieving 45 points.
In a statement released by the school on Monday, ACS(I) principal Winston Hodge said: "The IB diploma programme offers a rigorous and holistic programme to develop our students to meet the challenges of an increasingly globalised and complex world.
" Our students have benefitted from the programme and performed strongly. We are proud of them and share in their joy and success."