I'll search for recent large Modern tournaments from Melee with over 100 participants.
The most recent large Modern tournaments on Melee (100+ participants) are from SCG CON Houston, which ran multiple events from October 17-18, 2025. The largest was the $5K RCQ on Saturday with 171 players, followed by several Friday events including the LCQ (126 players) and three ReCQ tournaments ranging from 104-118 players each.
Prior to that, the MEGA Modern event on October 11th had 117 participants, and a Regional Championship the same day drew 114 players. Going back to late September, a 2nd Chance PTQ for PT Edge of Eternities had 148 participants.
Sources: Data from SCG CON Houston and other recent Melee-hosted Modern events between September 28 and October 18, 2025.
https://melee.gg/Decklist/View/33855ba3-06d0-47ed-bae1-b37a0085a56c
https://melee.gg/Decklist/View/ff3a5dc9-8f6d-44c1-a541-b3790120649c
https://melee.gg/Decklist/View/3ca38463-57bd-4b03-bc9c-b372014bd49a