diff --git a/app/celer-sim/Transporter.cc b/app/celer-sim/Transporter.cc
index c02cd2c9b7..9fa290c729 100644
--- a/app/celer-sim/Transporter.cc
+++ b/app/celer-sim/Transporter.cc
@@ -92,7 +92,6 @@ auto Transporter<M>::operator()(SpanConstPrimary primaries)
         }
         ++result.num_step_iterations;
         result.num_steps += track_counts.active;
-        result.num_aborted = track_counts.alive + track_counts.queued;
         result.max_queued = std::max(result.max_queued, track_counts.queued);
     };
 
@@ -127,9 +126,8 @@ auto Transporter<M>::operator()(SpanConstPrimary primaries)
         }
         if (CELER_UNLIKELY(interrupted()))
         {
-            CELER_LOG_LOCAL(error)
-                << "Caught interrupt signal: aborting transport "
-                   "loop";
+            CELER_LOG_LOCAL(error) << "Caught interrupt signal: aborting "
+                                      "transport loop";
             interrupted = {};
             break;
         }
@@ -144,6 +142,7 @@ auto Transporter<M>::operator()(SpanConstPrimary primaries)
         }
     }
 
+    result.num_aborted = track_counts.alive + track_counts.queued;
     result.num_track_slots = stepper_->state().size();
     return result;
 }
diff --git a/doc/appendix/release-history/v0.4.rst b/doc/appendix/release-history/v0.4.rst
index a3f3b48e84..a7ca0dbf4c 100644
--- a/doc/appendix/release-history/v0.4.rst
+++ b/doc/appendix/release-history/v0.4.rst
@@ -3,6 +3,50 @@
 .. SPDX-License-Identifier: CC-BY-4.0
 
 
+.. _release_v0.4.3:
+
+Version 0.4.3
+=============
+
+*Released 2024/05/01*
+
+Version 0.4.3 is a bugfix and minor feature update to Celeritas.
+
+- Adds diagnostic output for ``celer-sim`` even when not recording all steps
+- Fixes a sampling error for keV electron ionization
+- Builds with ROCm 5.7.1
+- Builds with Geant4 10.5–10.7, 11.1.0
+
+
+New features
+------------
+
+* Add JSON test comparator to improve testing reliability *(@sethrj, #1115)*
+* Add spack-based workflow to add all supported Geant4 versions to CI *(@sethrj, #1149)*
+* Add always-on basic diagnostics to celer-sim *(@amandalund, #1214)*
+
+Reviewers: @amandalund *(1)*, @drbenmorgan *(1)*, @sethrj *(1)*
+
+Bug fixes
+---------
+
+* Fix Moller-Bhahba energy distribution *(@amandalund, #1138)*
+* Fix Geant4 build from 10.5–10.7 and example build for 11.1 onward *(@sethrj, #1152)*
+* Fix missing Werror in build-fast workflow *(@sethrj, #1141)*
+* Fix build error with Geant4@11.1.0 *(@amandalund, #1199)*
+
+Reviewers: @sethrj *(2)*, @whokion *(1)*, @drbenmorgan *(1)*, @amandalund *(1)*
+
+Documentation improvements
+--------------------------
+
+* Update Frontier installation *(@sethrj, #1208)*
+
+Reviewers: @esseivaju *(1)*
+
+**Full Changelog**: https://github.com/celeritas-project/celeritas/compare/v0.4.2...v0.4.3
+
+
 .. _release_v0.4.2:
 
 Version 0.4.2
diff --git a/scripts/cmake-presets/frontier.json b/scripts/cmake-presets/frontier.json
index f1b72dfa9f..2f4f5afa5b 100644
--- a/scripts/cmake-presets/frontier.json
+++ b/scripts/cmake-presets/frontier.json
@@ -63,7 +63,8 @@
       "displayName": "Frontier release mode",
       "inherits": [".ndebug", ".base"],
       "cacheVariables": {
-        "BUILD_SHARED_LIBS":    {"type": "BOOL",   "value": "OFF"}
+        "BUILD_SHARED_LIBS":    {"type": "BOOL",   "value": "OFF"},
+        "CMAKE_INSTALL_PREFIX": "/lustre/orion/world-shared/hep143/celeritas/develop"
       }
     },
     {
diff --git a/scripts/env/frontier.sh b/scripts/env/frontier.sh
index 6108149b04..07e614fa0b 100755
--- a/scripts/env/frontier.sh
+++ b/scripts/env/frontier.sh
@@ -1,9 +1,8 @@
 #!/bin/sh -e
 
 PROJID=hep143
-_celer_view=${PROJWORK}/${PROJID}/opt-view
-_tool_view=/ccs/proj/${PROJID}/opt-view
-_conda=/ccs/proj/${PROJID}/conda-frontier
+_worldwork=${WORLDWORK}/${PROJID}
+_ccsproj=/ccs/proj/${PROJID}
 
 module load PrgEnv-amd/8.5.0 cpe/23.12 amd/5.7.1 craype-x86-trento \
   libfabric/1.15.2.0 miniforge3/23.11.0
@@ -27,10 +26,10 @@ export CC=${CRAYPE_DIR}/bin/cc
 # module load craype-accel-amd-gfx90a
 
 # Set up celeritas
-export SPACK_ROOT=/ccs/proj/hep143/spack
-export PATH=${_celer_view}/bin:${_tool_view}/bin:${_conda}/bin:$PATH
-export CMAKE_PREFIX_PATH=${_celer_view}:${CMAKE_PREFIX_PATH}
-export MODULEPATH=${PROJWORK}/${PROJID}/share/lmod/linux-sles15-x86_64/Core:${MODULEPATH}
+export SPACK_ROOT=${_ccsproj}/spack
+export PATH=${_worldwork}/opt-view/bin:${_ccsproj}/opt-view/bin:${_ccsproj}/conda-frontier/bin:$PATH
+export CMAKE_PREFIX_PATH=${_worldwork}/opt-view:${CMAKE_PREFIX_PATH}
+export MODULEPATH=${_worldwork}/share/lmod/linux-sles15-x86_64/Core:${MODULEPATH}
 
 # Set up Geant4 data 
 module load geant4-data/11.0