This year:

BuzzFeed News Mexico - closed in January 2019
HuffPost Mexico - closed in March 2019
New York Times en Español - closed in September 2019
Hoy (from Tribune Publishing) - closed in November 2019

Good thread from @NAHJ on the closure of Hoy and other publications this year https://twitter.com/nahj/status/1194706972752465920?s=21

For a broader picture of the landscape of Spanish language news see these two reports, also from this year:

The State of Latino News Media - from @gmochkofsky @newmarkjschool …http://thelatinomediareport.journalism.cuny.edu/ 

Hispanic Media Today - from @jretis @DemocracyFund https://www.democracyfund.org/publications/hispanic-media-today

For an even longer history: https://twitter.com/hechaenchicago/status/1194689730270683136?s=21