Overview
- Sigma opened in theatres on October 2, 2026, and director Jason Sanjay watched a first‑day first‑show in Chennai with his mother and sister.
- Tamil Nadu Chief Minister Vijay did not join formal promotions but publicly displayed a framed Sigma photo during a Madhurandhagam roadshow as a show of support.
- Actor Sundeep Kishan on October 1 accused a coordinated paid campaign of targeted anti‑tweets against him and the film and warned those he said were behind the posts.
- Early audience and online reactions were mixed, with many critics and viewers praising Sundeep Kishan’s performance while opinions about Jason Sanjay’s direction were divided.
- Trade tracker Sacnilk reported an India Day‑1 net of Rs 2.35 crore for Sigma, with the Tamil version the larger contributor, and industry watchers say the opening weekend will determine the film’s longer‑term prospects.