Ken Yip of Buddhist Sin Tak College won the top prizes in the PowerPoint and Excel categories in previous years.
The companies' decision has sent many anti-Elab protesters to the shops to buy their products.
The Hok Yau Club Student Guidance Centre said the drop is possibly due to their being fewer candidates as well as more student services.
Fears raised that students who do not speak Chinese are being let down by curriculum that prevents them reaching higher standards in local language.
There were also six 'super top scorers' who got an additional 5** in the Maths Extended exam.
The 2018 Hong Kong Diploma of Secondary Education (HKDSE) results were released today, and this year 12 students obtained the highest score of 5** in the four core subjects and three electives.
Top results are best since new curriculum was launched, but fewer reach minimum university entrance requirements.
Young Post is reporting live from all over the city, as students eagerly receive their grades, and this year's top scorers are revealed.
A University of Hong Kong professor says her declaration is not exactly clear.
However, whether it was effectively withdrawn – as demanded by protesters – remained unclear.