It used to own an underwater terrestrial facility near the coast of Puerto Chicxulub. It was the member named Charles Hammond, a fellow technician who informed Michael Altman about the phenomenon and later committed suicide (Most likely affected by the alien effigy) on the night of 2215 on the streets of the city. DredgerCorp partnered with the military and used their offshore facility to bring the Black Marker to the surface for study.
On March 14, 2215, when Michael and his girlfriend, Ada Chavez escaped the facility of DredgerCorp, they went to Washington, D.C. and held a press conference about the alien artifact. Soon after the outbreak at the oceanic facity, Craig Markoff, Krax and Stevens brought them to the waterworks of DredgerCorp and Michael and Ada died there as a punishment.
In 2514, Isaac Clarke ventured through a DredgerCorp office on the New Horizons Colony on Luna while on the run from the Circle. It's presence indicated that the corporation survived the (Presumably costly and scandalous) Black Marker incident and was still operating 300 years later.