Qsac INC

Owner of record of 11 New York City tax lots, with 19 residential units, according to the city's lot file.

By borough

Queens9 lots
Manhattan2 lots

By building type

Two family dwelling6 lots
One family dwelling2 lots
Walk-up apartments2 lots
Educational1 lots

Names are as the city records them. A company's owner of record is a legal entity; who controls it is a separate question.