Alcoa

==The Pittsburgh Reduction Company==
===1894–1910===
==Aluminum Company of America==
===1910–1929===
==Alcoa==
===1929–1955===
AlcoaLogo.gif|Variants
===1955–1963===
Alcoa Signature.gif
===1963-1999===
Alcoa - 1962 sq.svg|Alternate version
===1999–2016===
Alcoa horizontal.svg|Horizontal version
===2016–present===
Alcoa new horizontal.svg|Horizontal version
In 2016, Alcoa split its downstream assets into Arconic. In the process, they introduced a new logo.
Category:Pittsburgh
Category:Pennsylvania
Category:United States
Category:1894
Category:1910
Category:1929
Category:Manufacturers
Category:Manufacturers in the United States
Category:Industry
Category:Mining
Category:Technology
Category:Recycling