* DCCCU (now known as DCCCO) was organized on February 17, 1968, with an initial capital of P1,181.50 contributed by forty-nine (49) parents and teachers of DCC.
* The Co-op was officially registered on August 5, 1969, with the Cooperatives Administration Office and on September 25, 1975, with the Bureau of Cooperative Development. Its registration was confirmed by the Cooperatives Development Authority on April 15, 1991.
* The number of members multiplied rapidly, and so to provide prompt and professional service Mrs. Felicidad L. Ruiz (the former General Manager) was hired on April 1, 1976 as the first paid staff.
* To ease the Co-op’s problem of space, Bishop Epifanio B. Surban allowed DCCCO to put up its own building within the Cathedral compound. In February 1977, the good Bishop blessed the first co-op building, constructed through bayanihan labor and members’ donations in the form of cash and materials. In 1988, a second floor was added to the original structure to accommodate the PMES and other meetings.
* To build a much bigger infrastructure became imperative. The General Assembly approved the purchase of a lot and the erection of a 3-storey building, and to “plow back their one- year dividends and patronage refund” to start the construction. Not a single centavo came from outside funding or borrowings – only the singular commitment, sacrifice and generosity of officers, staff and general membership made the dream a reality. Built with DCCCO’s own resources, its new imposing building, now standing on its own lot at Sta. Rosa Street, was blessed by Bishop John F. Du on July 27, 2002
* In 2012, DCCCO, with the approval of the Cooperative Development Authority (CDA), changed from credit cooperative to multipurpose cooperative. Being known in the community as DCCCO, the Board decided to retain the name DCCCO with the addition of multipurpose cooperative.
*In 2012, the Board of Directors, chaired by Mr. William E. Ablong, upon the retirement of General Manager Ruiz, appointed a new Chief Executive Officer in the person of Mrs. Flordeliz V. Bokingkito.
* In 2012, DCCCO was recognized by the CDA as Gawad Parangal - Best in Community Involvement and 2nd Most Outstanding Cooperative (Large Scale Category).
* From 2012 to 2015, three (3) more branches were opened. DCCCO partnered with the Department of Social Welfare and Development in providing financial education and skills training to the beneficiaries of the PantawidPamilyang Pilipino Program in the province of Negros Oriental and with various public and private schools in the implementation of the Aflatoun Program.