Jerome Adonis

Ronald Mangampo "Jerome" Adonis (born February 27, 1972) is a Filipino trade union and labor activist. Since 2025, he has been serving as the national chairperson of Kilusang Mayo Uno (KMU), the largest trade union in the country. He ran under Makabayan in the 2025 Philippine Senate election.

Early life Eldest of six siblings, Adonis was born in 1972 in Ligao, Albay. His family left Bicol because of the militarization under the Marcos dictatorship. He left high school and worked at age 16 at a carton factory.

Adonis became a full-time labor organizer of KMU in 2002 and was elected as its secretary-general at its 11th Congress in 2015 and reelected in 2018 at its 12th Congress. He was also elected as second deputy secretary of the International League of Peoples' Struggle in early 2024.

On December 4, 2024, Adonis and 74 others filed the second impeachment complaint against Vice President Sara Duterte, citing betrayal of public trust for her office's alleged misuse of confidential funds. By February 2025, it was consolidated with two other complaints into a single impeachment complaint and signed by 240 lawmakers out of 305, reaching the 1/3 votes threshold and impeaching Vice President Duterte.

On January 26, 2026, Adonis and 35 others filed the second impeachment complaint against President Bongbong Marcos, citing his potential involvement in the "BBM Parametric Formula" used by the Department of Public Works and Highways, which they alleged to have allowed systemic corruption in government, as well as his alleged involvement in kickback schemes and unprogrammed appropriations.

2025 Senate bid Speaking at the Baha Sa EDSA mobilization, part of the EDSA People Power 40th anniversary commemoration and Philippine anti-corruption protests. He was announced as Makabayan Coalition's third senatorial bet on August 2, 2024, during a meeting of a labor union in Cabuyao, Laguna.

Adonis would lose the 2025 Senate election and would place 49th with 779,868 votes.