S&P Global issued a statement expressing its “deepest sympathies” to Ms Gos and her mother, who police said were “fighting for their lives” after being taken to a south London hospital on Sunday.
The Met said the women were 30-years-old and 64-years-old and were violently assaulted by what they believe may have been a hammer in Eltham, southeast London.
Joe Xuereb, 27, was later arrested in Old Farm Avenue, Sidcup, roughly two miles away from the scene of what police described as a “horrific attack”.
He remains in custody on suspicion of two attempted murders.
The statement from S&P Global continued: “We are extremely shocked and saddened by the senseless attack on one of our employees, Ania Gos, and her mother on Sunday afternoon.
“Our thoughts and deepest sympathies go out to their family and friends as Ania and her mother remain in critical condition.
“At this time, we are here for whatever Ania and her family need and ask that the media respect their family’s privacy.”