▁Car ▁Man ufact uring ▁Company ▁and ▁became ▁the ▁Harris burg ▁Ste el ▁Corporation ▁in ▁ 1 9 3 5 . ▁▁ ▁Following ▁a ▁series ▁of ▁ac quis itions , ▁the ▁company ▁became ▁H ars co ▁Corporation ▁in ▁ 1 9 5 6 , ▁forming ▁three ▁divisions : ▁Met als ▁& ▁Min er als , ▁Rail , ▁and ▁Indust rial . ▁In ▁ 2 0 1 8 , ▁H ars co ▁acquired ▁Al tek , ▁a ▁U . K .- based ▁supp lier ▁of ▁al umin um ▁products . ▁In ▁ 2 0 1 9 , ▁H ars co ▁Met als ▁& ▁Min er als ▁re brand ed ▁to ▁H ars co ▁Environment al , ▁and ▁acquired ▁C lean ▁Earth , ▁a ▁U . S . ▁provider ▁of ▁environment ally ▁sust ain able ▁solutions ▁for ▁special ty ▁waste ▁streams . ▁ ▁H ars co ▁currently ▁oper ates ▁four ▁primary ▁business es : ▁C lean ▁Earth , ▁H ars co ▁Environment al , ▁H ars co ▁Rail , ▁and ▁H ars co ▁Indust rial . ▁ ▁In ▁April ▁ 2 0 2 0 , ▁H ars co ▁Corporation ▁acquired ▁the ▁Environment al ▁Sol utions ▁business ▁( ES OL ) ▁from ▁Ster icy cle , ▁Inc . ▁ ▁Fin an cial ▁information ▁ ▁H ars co ▁reported ▁total ▁sales ▁of ▁US D ▁$ 1 . 7 ▁billion ▁in ▁fis cal ▁year ▁ 2 0 1 8 . ▁ ▁Stock ▁ex changes ▁ ▁H ars co ▁is ▁trad ed ▁public ly ▁on ▁NY SE ▁with ▁t icker