The figure represents a second consecutive year of higher activity compared to the 149 complaints recorded during the preceding twelve months.
Among the total volume, 95 grievances concerned ministers while 66 were directed at members of the legislative assembly.
A significant portion of the recent surge involved a controversy surrounding social media content posted by DUP minister Gordon Lyons in June last year.
The investigation relates to remarks made when immigrant families were compelled to leave their residences amid racially motivated disorder in County Antrim.
Complaint levels had previously fallen to 65 during the 2023-24 session, a time when Stormont institutions faced suspension following disputes over post-Brexit trade regulations.
The commissioner's findings form part of his first annual report since taking office after Melissa McCullough completed her five-year term last year.
The body is responsible for examining allegations made against politicians within the power-sharing government structure.