We are pleased to announce the release of PETSc version 3.12 at http://www.mcs.anl.gov/petsc The major changes and updates can be found at http://www.mcs.anl.gov/petsc/documentation/changes/312.html We recommend upgrading to PETSc 3.12 soon. As always, please report problems to [email protected] and ask questions at [email protected] This release includes contributions from Alex Lindsay Alp Dener Barry Smith Boris Boutkov Chris Eldred Dave May David Wells Debojyoti Ghosh deepblu2718 Emil Constantinescu Fande Kong Florian Wechsung Glenn Hammond Hannah Morgan Hansol Suh Hendrik Ranocha Hong Zhang Hong Zhang Jacob Faibussowitsch Jakub Kružík Jed Brown Jeffrey Larson Joe Wallwork Jose E. Roman Julian Giordani Junchao Zhang Karl Rupp Lawrence Mitchell Lisandro Dalcin Lu luzhanghpp Mark Adams Martin Diehl Matthew G. Knepley Patrick Farrell Patrick Sanan Pierre Jolivet Richard Tran Mills Sajid Ali Satish Balay Scott Kruger Siegfried Cools Stefano Zampini Thibaut Appel Tristan Konolige Václav Hapla valeriabarr Volker Jacht William Gropp and bug reports/patches/proposed improvements received from 장승언 Adina Püsök Andrea Gallegati "Appel, Thibaut" Åsmund Ervik "Aulisa, Eugenio" Barry Smith "Betrie, Getnet" Brad Aagaard Carl Steefel Clausen Pascal Danyang Su Dave A. May David Dang Veselin Dobrev Dylan P. Brennan Ed Bueler Elias Karabelas Fabian Jakub Fande Kong Glenn E. Hammond "Guenther, Stefanie" Hannah Mairs Morgan Hapla Vaclav Heeho Park Hong Zhang Hubert Weissmann Ian Lin Jacob Faibussowitsch Jakub Kruzik Jaysaval, Piyoosh Jed Brown Joe Wallwork Jose E. Roman Junchao Zhang Karl Lin Karl Rupp Daniel Kokron Lardelli Nicolo Jeffery Larson Leon Avery Lisandro Dalcin Magne Rudshaug Manuel Colera Rico Mark Adams Matthew Knepley Matthias Beaupere Mohammad Asghar Mouralidaran Arrutselvi "Nair, Nirmal Jayaprasad" Nick Papior Oana Marin Paolo Orsini Patrick Sanan Paul Seibert Pierre Jolivet Piyoosh Jaysaval Prince Joseph Richard Katz Richard Tran Mills Robert Nr Nourgaliev Sajid Ali Satish Balay "Schanen, Michel" Sergi Molins Rafa Sophie Blondel Stefano Zampini Steve Thibaut Appel Tim Steinhoff Todd Munson Tom Goffrey Vaclav Hapla "Wells, David" Xiangdong Xiang Huang Yuyun Yang "Zhang, Hong" "Zhang, Junchao"