1898-1906 - Ballston Terminal Railroad Co.
1906-1918 - Eastern New York Railroad Co.
1918-1929 - Kaydeross Railroad Corp.
Interurban lines:
Ballston Spa-Middle Grove (1898-1929)
1897-1913 - Penn Yan Keuka Park & Branchport Railway
1913-1927 - Penn Yan & Lake Shore Railway
Interurban lines:
Penn Yan-Branchport (1897-1927)
1880-1906 - Olean Street Railway Co.
1906-1921 - Western New York & Pennsylvania Traction Co.
1921-1927 - Olean Bradford & Salamanca Railway Co.
Interurban lines:
Olean-Allegany (1894-1927)
Olean-Bolivar (1902-1926)
Olean-Shingle House (1903-1927)
Salamanca-Allegany (1907-1927)
Salamanca-Little Valley (1908-1925)
Bradford PA-Lewis Run PA (1901-1927)
Bradford PA-Seneca Jct. (1908-1927)
Replacement interurban bus service operated by Olean Bradford & Salamanca Bus Co. (1925-1929)/Allegany Coach Co. (1929-1938)
West Ridge Transportation Co. (after 1938)
1905-1911 - Keeseville Ausable Chasm & Lake Champlain Railroad Co.
Interurban lines:
Keeseville-Port Kent (1905-1911)
1899-1915 - Lima Honeoye Electric Light & Railroad Co.
Interurban lines:
Lima-Honeoye Falls (1899-1915)
1906-1936 - Paul Smith's Electric Light Power & Railroad Co.
Interurban lines:
Paul Smith's Hotel-Lake Clear Junction (1906-1936)