The vendored SUNDIALS source is copyright:

  Lawrence Livermore National Security [cph]
  Southern Methodist University [cph]
  University of Maryland Baltimore County [cph]

and was written by the SUNDIALS team and contributors, including:

  Hindmarsh, Alan C. [aut, cph]
  Reynolds, Daniel R. [aut, cph]
  Gardner, David J. [aut, cph]
  Balos, Cody J. [aut, cph]
  Woodward, Carol S. [aut, cph]
  Serban, Radu [aut, cph]
  Cohen, Scott D. [aut, cph]
  Byrne, George D. [aut, cph]
  Brown, Peter N. [aut, cph]
  Grant, Keith E. [aut, cph]
  Lee, Steven L. [aut, cph]
  Shumaker, Dan E. [aut, cph]
  Taylor, Allan G. [aut, cph]
  Collier, Aaron [aut, cph]
  Banks, Lawrence E. [aut, cph]
  Smith, Steve [aut, cph]
  Petra, Cosmin [aut, cph]
  Peles, Slaven [aut, cph]
  Loffeld, John [aut, cph]
  Yang, Ulrike M. [aut, cph]
  Almgren-Bell, James [aut, cph]
  Lockhart, Shelby L. [aut, cph]
  Tiedeman, Hilari C. [aut, cph]
  Yan, Ting [aut, cph]
  Sexton, Jean M. [aut, cph]
  White, Chris [aut, cph]

For the complete and authoritative list see the AUTHORS file in the SUNDIALS
source distribution and https://github.com/LLNL/sundials. The BSD 3-Clause
license text and the U.S. Department of Energy notice are in
inst/SUNDIALS-LICENSE and inst/SUNDIALS-NOTICE.