Jacksonville Traction Co.
Jacksonville FL
Acquired 1902 by Stone & Webster
Transit operations sold 1932
Pensacola Electric Co.
Pensacola FL
Acquired 1906 by Stone & Webster
Sold to Southeastern Power & Light Co. 1924
Tampa Electric Co.
Tampa FL
Acquired 1902 by Stone & Webster
Transit operations sold 1946
Columbus Railroad Co.
Columbus GA
Acquired 1901 by Stone & Webster
Transit operations sold 1930 to Commonwealth & Southern Corp.
Keokuk Electric Co.
Keokuk IA
Acquired 1911 by Stone & Webster
Sold to North American Co. 1925
Paducah Traction & Light Co.
Paducah KY
Acquired 1905 by Stone & Webster
Sold to Kentucky Utilities Co./Middle West Utilities Co. 1925
Brockton & Plymouth Street Railway
Interurban (MA)
Acquired 1901 by Stone & Webster
Transit operations sold 1919
Blue Hill Street Railway Co.
Interurban (MA)
Acquired 1906 by Stone & Webster
Transit operations sold 1919
Houghton County Traction Co.
Houghton MI
Acquired 1900 by Stone & Webster
Sold to Central Public Service Co. 1925
Dallas Electric Corp.
Dallas TX
Acquired 1902 by Stone & Webster
Transit operations sold 1917 to Electric Bond & Shares Co.
Northern Texas Electric Co.
Fort Worth
Acquired 1905 by Stone & Webster
Transit operations sold 1947
Galveston-Houston Electric Co.
Galveston TX, Houston TX, connecting interurban line
Acquired 1903 by Stone & Webster
Transit operations sold 1951
Puget Sound Power & Light Co.
Seattle, Tacoma, Bellingham, Everett, Olympia, Centralia/Chehalis, interurban lines
Acquired 1900 by Stone & Webster
Transit operations discontinued 1939
ENGINEERS PUBLIC SERVICE CO.
Incorporated 1925 as subsidiary of Stone & Webster, controlling various properties previously acquired by Stone & Webster. In 1937 became independent from Stone & Webster, liquidated 1956.
Key West Electric Co.
Key West FL
Acquired 1905 by Stone & Webster
Transit operations discontinued 1933
Savannah Electric & Power Co.
Savannah GA
Acquired 1901 by Stone & Webster
Transit operations sold 1945
Baton Rouge Electric Co.
Baton Rouge LA
Acquired 1907 by Stone & Webster
Transit operations sold 1943
Eastern Texas Electric Co.
Beaumont, Port Arthur, connecting interurban line, Lake Charles LA
Acquired 1911 by Stone & Webster
Transit operations sold 1932
El Paso Electric Co.
El Paso TX
Acquired 1901 by Stone & Webster
Transit operations sold 1943
Virginia Electric & Power Co.
Norfolk, Petersburg, Richmond, interurban lines
Acquired 1925 by Stone & Webster
Transit operations sold 1944
Stone & Webster continues to exist as an engineering and consulting company.