It was founded by former Defense Secretary Renato de Villa when he left the ruling Lakas-NUCD after failing to get the nomination as the party's presidential candidate in the 1998 elections.

Haydee Yorac, Roy Señeres, and Rey Langit were among the candidates who failed to win a single seat in the Senate.

In 2020, former speaker Pantaleon Alvarez resigned from the ruling PDP–Laban and accepted de Villa's offer of him becoming secretary-general of the revived Reporma.

[6] The following month, some members of Partido Reporma, including those from Aklan and Antique, expressed disappointment with Alvarez's decision as they continued rooting for the Lacson–Sotto tandem.

[8] On September 20, 2024, Partido Demokratiko Pilipino formally formed an alliance for the 2025 elections with Partido para sa Demokratikong Reporma, Pederalismo ng Dugong Dakilang Samahan and the Mayor Rodrigo Roa Duterte-National Executive Coordinating Committee (MRRD-NECC).