The Brooklyn Rapid Transit Co. was incorporated in 1896, and eventually acquired most of the street railway companies in Brooklyn, as well as many of the subway and elevated lines. Only street railway companies are listed here.
Brooklyn City Railroad - chartered 1853, opened 1854, was the first street railway in Brooklyn.
Brooklyn Heights Railroad Co. - chartered 1887, opened 1891, in 1893 leased the Brooklyn City Railroad.
Long Island Traction Co. - incorporated 1892 and acquired the Brooklyn Heights Railroad Co, and 1894 acquired the Brooklyn Queens County & Suburban Railroad, which was incorporated 1894, acquiring the following three companies.
Broadway Ferry & Metropolitan Avenue Railroad - incorporated 1892 as reorganization of Brooklyn Bushwick & Queens County Railroad Co.
Broadway Railroad Co. of Brooklyn - chartered 1858, opened 1873.
Jamaica & Brooklyn Road Co. - incorporated 1890 and acquired the Jamaica Woodhaven & Brooklyn Railway Co., which had been chartered 1892.
Nassau Electric Railroad - chartered 1893, opened 1895, and subsequently acquired the following four companies.
Coney Island Fort Hamilton & Brooklyn Railroad - chartered 1892, acquired 1898 by Nassau Electric Railroad.
Kings County Electric Railway - chartered 1892, acquired 1898 by Nassau Electric Railroad.
Union Railroad Co. of Brooklyn - chartered 1884, acquired 1898 by Nassau Electric Railroad.
United Railroad - acquired 1899 by Nassau Electric Railroad.
Atlantic Avenue Railroad Co. - chartered 1872, acquired 1893 by Brooklyn Traction Co., acquired 1896 by Kings County Traction Co., leased 1896 to Nassau Electric Railroad, also had acquired the Brooklyn Cable Co., chartered 1886.
In 1896, the Brooklyn Rapid Transit Co. acquired the Long Island Traction Co. and the Nassau Electric Railroad. The Brooklyn Heights Railroad Co. was designated to manage the companies, including leased companies. Within the next few years, all street railways were controlled by the Brooklyn Rapid Transit Co., except for the following two companies.
Van Brunt St. & Erie Basin Railroad - chartered 1861, opened 1863.
Coney Island & Brooklyn Railroad - chartered 1860, opened 1862, subsequently acquired the following two companies.
Prospect Park & Flatbush Railroad - chartered 1875, acquired 1891 by Coney Island & Brooklyn Railroad.
Brooklyn City & Newtown Railroad - chartered 1860, opened 1862, acquired 1898 by Coney Island & Brooklyn Railroad.
In 1914, the Coney Island & Brooklyn Railroad was finally acquired by the Brooklyn Rapid Transit Co. The Van Brunt St. & Erie Basin Railroad remained independent until its demise in 1929.
In 1913, the owners repossessed the leased Brooklyn City Railroad from the Brooklyn Rapid Transit Co. The Brooklyn City Railroad merged into successor Brooklyn Manhattan Transit in 1929.
In 1923, the Brooklyn Rapid Transit Co. was acquired by Brooklyn Manhattan Transit. And in 1940, Brooklyn Manhattan Transit was sold to the city of New York.