Vessel-tracking data showed traffic through the Strait of Hormuz fell after Iran seized two ships on Wednesday, tightening its grip on the key waterway, Reuters reported.
Fewer vessels moved through the strait in the past day than usual, according to Reuters data, as security risks rose.
Judiciary-affiliated media identified him as Erfan Kiani and said his death sentence had been upheld by the Supreme Court before being carried out early in the morning.
Authorities said Kiani led a group in the central city of Isfahan that carried out acts including damaging public and private property, setting fires, using Molotov cocktails, blocking roads and attacking security forces during the unrest.
State media described him as a key figure in efforts to create “fear and chaos,” framing the case as part of what officials say is a broader campaign against foreign-backed activity.
The execution comes amid an ongoing crackdown following the January protests, with several people executed in recent weeks on similar charges. Earlier this month, authorities executed two men accused of attempting to storm a military site and access weapons, while another man was put to death over allegations he set fire to a mosque during the unrest.
Rights groups, including Amnesty International, have repeatedly raised concerns over the use of capital punishment in protest-related cases, saying defendants are often convicted in unfair trials and based on confessions obtained under duress.