First cut at acknowledgements

Signed-off-by: Ralph Castain <rhc@pmix.org>
Co-authored-by: Josh Hursey <jhursey@us.ibm.com>

Acknowledgements.tex

@@ -14,13 +14,39 @@ \section{Version 4.0}
 The following list includes some of the active participants in the PMIx v4 standardization process.
 
 \begin{itemize}
-\item \ldots
+\item Ralph H. Castain and Danielle Sikich
+\item Joshua Hursey abd David Solt
+\item Dirk Schubert
+\item John DelSignore
+\item Aurelien Bouteiller
+\item Michael A Raymond
+\item Howard Pritchard and Nathan Hjelm
+\item Brice Goglin
+\item Kathryn Mohror and Stephen Herbein
+\item Thomas Naughton and Swaroop Pophale
+\item William E. Allcock and Paul Rich
+\item Michael Karo
+\item Artem Polyakov
 \end{itemize}
 
 The following institutions supported this effort through time and travel support for the people listed above.
 
 \begin{itemize}
-\item \ldots
+\item Intel Corporation
+\item IBM, Inc.
+\item Allinea (ARM)
+\item Perforce
+\item University of Tennessee, Knoxville
+\item The Exascale Computing Project, an initiative of the US Department of Energy
+\item National Science Foundation
+\item HPE Co.
+\item Los Alamos National Laboratory
+\item INRIA
+\item Lawrence Livermore National Laboratory
+\item Oak Ridge National Laboratory
+\item Argonne National Laboratory
+\item Altair
+\item NVIDIA
 \end{itemize}
 
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