diff --git a/runtime/syntax/sh.vim b/runtime/syntax/sh.vim
index a83c020..13f7b65 100644
--- a/runtime/syntax/sh.vim
+++ b/runtime/syntax/sh.vim
@@ -138,17 +138,17 @@
 syn cluster shArithParenList	contains=shArithmetic,shArithParen,shCaseEsac,shComment,shDeref,shDo,shDerefSimple,shEcho,shEscape,shNumber,shOperator,shPosnParm,shExSingleQuote,shExDoubleQuote,shHereString,shRedir,shSingleQuote,shDoubleQuote,shStatement,shVariable,shAlias,shTest,shCtrlSeq,shSpecial,shParen,bashSpecialVariables,bashStatement,shIf,shFor,shFunctionKey,shFunctionOne,shFunctionTwo
 syn cluster shArithList	contains=@shArithParenList,shParenError
 syn cluster shCaseEsacList	contains=shCaseStart,shCaseLabel,shCase,shCaseBar,shCaseIn,shComment,shDeref,shDerefSimple,shCaseCommandSub,shCaseExSingleQuote,shCaseSingleQuote,shCaseDoubleQuote,shCtrlSeq,@shErrorList,shStringSpecial,shCaseRange
-syn cluster shCaseList	contains=@shCommandSubList,shCaseEsac,shColon,shCommandSub,shCommandSubBQ,shComment,shDblBrace,shDo,shEcho,shExpr,shFor,shHereDoc,shIf,shHereString,shRedir,shSetList,shSource,shStatement,shVariable,shCtrlSeq
+syn cluster shCaseList	contains=@shCommandSubList,shCaseEsac,shColon,shCommandSub,shCommandSubBQ,shSubshare,shValsub,shComment,shDblBrace,shDo,shEcho,shExpr,shFor,shHereDoc,shIf,shHereString,shRedir,shSetList,shSource,shStatement,shVariable,shCtrlSeq
 if exists("b:is_kornshell") || exists("b:is_bash")
  syn cluster shCaseList	add=shForPP,shDblParen
 endif
 syn cluster shCommandSubList	contains=shAlias,shArithmetic,shCmdParenRegion,shCommandSub,shComment,shCtrlSeq,shDeref,shDerefSimple,shDoubleQuote,shEcho,shEscape,shExDoubleQuote,shExpr,shExSingleQuote,shHereDoc,shNumber,shOperator,shOption,shPosnParm,shHereString,shRedir,shSingleQuote,shSpecial,shStatement,shSubSh,shTest,shVariable
 syn cluster shCurlyList	contains=shNumber,shComma,shDeref,shDerefSimple,shDerefSpecial
 " COMBAK: removing shEscape from shDblQuoteList fails ksh04:43 -- Jun 09, 2022: I don't see the problem with ksh04, so am reinstating shEscape
-syn cluster shDblQuoteList	contains=shArithmetic,shCommandSub,shCommandSubBQ,shDeref,shDerefSimple,shEscape,shPosnParm,shCtrlSeq,shSpecial,shSpecialDQ
+syn cluster shDblQuoteList	contains=shArithmetic,shCommandSub,shCommandSubBQ,shSubshare,shValsub,shDeref,shDerefSimple,shEscape,shPosnParm,shCtrlSeq,shSpecial,shSpecialDQ
 syn cluster shDerefList	contains=shDeref,shDerefSimple,shDerefVar,shDerefSpecial,shDerefWordError,shDerefPSR,shDerefPPS
 syn cluster shDerefVarList	contains=shDerefOffset,shDerefOp,shDerefVarArray,shDerefOpError
-syn cluster shEchoList	contains=shArithmetic,shCommandSub,shCommandSubBQ,shDeref,shDerefSimple,shEscape,shExSingleQuote,shExDoubleQuote,shSingleQuote,shDoubleQuote,shCtrlSeq,shEchoQuote
+syn cluster shEchoList	contains=shArithmetic,shCommandSub,shCommandSubBQ,shSubshare,shValsub,shDeref,shDerefSimple,shEscape,shExSingleQuote,shExDoubleQuote,shSingleQuote,shDoubleQuote,shCtrlSeq,shEchoQuote
 syn cluster shExprList1	contains=shCharClass,shNumber,shOperator,shExSingleQuote,shExDoubleQuote,shSingleQuote,shDoubleQuote,shExpr,shDblBrace,shDeref,shDerefSimple,shCtrlSeq
 syn cluster shExprList2	contains=@shExprList1,@shCaseList,shTest
 syn cluster shFunctionList	contains=@shCommandSubList,shCaseEsac,shColon,shComment,shDo,shEcho,shExpr,shFor,shHereDoc,shIf,shOption,shHereString,shRedir,shSetList,shSource,shStatement,shVariable,shOperator,shCtrlSeq
@@ -159,24 +159,29 @@
 syn cluster shHereBeginList	contains=@shCommandSubList
 syn cluster shHereList	contains=shBeginHere,shHerePayload
 syn cluster shHereListDQ	contains=shBeginHere,@shDblQuoteList,shHerePayload
-syn cluster shIdList	contains=shArithmetic,shCommandSub,shCommandSubBQ,shWrapLineOperator,shSetOption,shComment,shDeref,shDerefSimple,shHereString,shNumber,shOperator,shRedir,shExSingleQuote,shExDoubleQuote,shSingleQuote,shDoubleQuote,shExpr,shCtrlSeq,shStringSpecial,shAtExpr
+syn cluster shIdList	contains=shArithmetic,shCommandSub,shCommandSubBQ,shSubshare,shValsub,shWrapLineOperator,shSetOption,shComment,shDeref,shDerefSimple,shHereString,shNumber,shOperator,shRedir,shExSingleQuote,shExDoubleQuote,shSingleQuote,shDoubleQuote,shExpr,shCtrlSeq,shStringSpecial,shAtExpr
 syn cluster shIfList	contains=@shLoopList,shDblBrace,shDblParen,shFunctionKey,shFunctionOne,shFunctionTwo
 syn cluster shLoopList	contains=@shCaseList,@shErrorList,shCaseEsac,shConditional,shDblBrace,shExpr,shFor,shIf,shOption,shSet,shTest,shTestOpr,shTouch
 if exists("b:is_kornshell") || exists("b:is_bash")
  syn cluster shLoopList	add=shForPP,shDblParen
 endif
-syn cluster shPPSLeftList	contains=shAlias,shArithmetic,shCmdParenRegion,shCommandSub,shCtrlSeq,shDeref,shDerefSimple,shDoubleQuote,shEcho,shEscape,shExDoubleQuote,shExpr,shExSingleQuote,shHereDoc,shNumber,shOperator,shOption,shPosnParm,shHereString,shRedir,shSingleQuote,shSpecial,shStatement,shSubSh,shTest,shVariable
+syn cluster shPPSLeftList	contains=shAlias,shArithmetic,shCmdParenRegion,shCommandSub,shSubshare,shValsub,shCtrlSeq,shDeref,shDerefSimple,shDoubleQuote,shEcho,shEscape,shExDoubleQuote,shExpr,shExSingleQuote,shHereDoc,shNumber,shOperator,shOption,shPosnParm,shHereString,shRedir,shSingleQuote,shSpecial,shStatement,shSubSh,shTest,shVariable
 syn cluster shPPSRightList	contains=shDeref,shDerefSimple,shEscape,shPosnParm
-syn cluster shSubShList	contains=@shCommandSubList,shCommandSubBQ,shCaseEsac,shColon,shCommandSub,shComment,shDo,shEcho,shExpr,shFor,shIf,shHereString,shRedir,shSetList,shSource,shStatement,shVariable,shCtrlSeq,shOperator
-syn cluster shTestList	contains=shArithmetic,shCharClass,shCommandSub,shCommandSubBQ,shCtrlSeq,shDeref,shDerefSimple,shDoubleQuote,shSpecialDQ,shExDoubleQuote,shExpr,shExSingleQuote,shNumber,shOperator,shSingleQuote,shTest,shTestOpr
+syn cluster shSubShList	contains=@shCommandSubList,shCommandSubBQ,shSubshare,shValsub,shCaseEsac,shColon,shCommandSub,shComment,shDo,shEcho,shExpr,shFor,shIf,shHereString,shRedir,shSetList,shSource,shStatement,shVariable,shCtrlSeq,shOperator
+syn cluster shTestList	contains=shArithmetic,shCharClass,shCommandSub,shCommandSubBQ,shSubshare,shValsub,shCtrlSeq,shDeref,shDerefSimple,shDoubleQuote,shSpecialDQ,shExDoubleQuote,shExpr,shExSingleQuote,shNumber,shOperator,shSingleQuote,shTest,shTestOpr
 syn cluster shNoZSList	contains=shSpecialNoZS
-syn cluster shForList	contains=shTestOpr,shNumber,shDerefSimple,shDeref,shCommandSub,shCommandSubBQ,shArithmetic
+syn cluster shForList	contains=shTestOpr,shNumber,shDerefSimple,shDeref,shCommandSub,shCommandSubBQ,shSubshare,shValsub,shArithmetic
 
 " Echo: {{{1
 " ====
 " This one is needed INSIDE a CommandSub, so that `echo bla` be correct
-syn region shEcho matchgroup=shStatement start="\<echo\>"  skip="\\$" matchgroup=shEchoDelim end="$" matchgroup=NONE end="[<>;&|()`]"me=e-1 end="\d[<>]"me=e-2 end="#"me=e-1 contains=@shEchoList skipwhite nextgroup=shQuickComment
-syn region shEcho matchgroup=shStatement start="\<print\>" skip="\\$" matchgroup=shEchoDelim end="$" matchgroup=NONE end="[<>;&|()`]"me=e-1 end="\d[<>]"me=e-2 end="#"me=e-1 contains=@shEchoList skipwhite nextgroup=shQuickComment
+if exists("b:is_kornshell")
+ syn region shEcho matchgroup=shStatement start="\<echo\>"  skip="\\$" matchgroup=shEchoDelim end="$" matchgroup=NONE end="[<>;&|()`}]"me=e-1 end="\d[<>]"me=e-2 end="#"me=e-1 end="\ze[ \t\n;]}" contains=@shEchoList skipwhite nextgroup=shQuickComment
+ syn region shEcho matchgroup=shStatement start="\<print\>" skip="\\$" matchgroup=shEchoDelim end="$" matchgroup=NONE end="[<>;&|()`}]"me=e-1 end="\d[<>]"me=e-2 end="#"me=e-1 end="\ze[ \t\n;]}" contains=@shEchoList skipwhite nextgroup=shQuickComment
+else
+ syn region shEcho matchgroup=shStatement start="\<echo\>"  skip="\\$" matchgroup=shEchoDelim end="$" matchgroup=NONE end="[<>;&|()`]"me=e-1 end="\d[<>]"me=e-2 end="#"me=e-1 contains=@shEchoList skipwhite nextgroup=shQuickComment
+ syn region shEcho matchgroup=shStatement start="\<print\>" skip="\\$" matchgroup=shEchoDelim end="$" matchgroup=NONE end="[<>;&|()`]"me=e-1 end="\d[<>]"me=e-2 end="#"me=e-1 contains=@shEchoList skipwhite nextgroup=shQuickComment
+endif
 if exists("b:is_kornshell") || exists("b:is_bash") || exists("b:is_posix")
  syn region shEchoDeref contained matchgroup=shStatement start="\<echo\>"  skip="\\$" matchgroup=shEchoDelim end="$" end="[<>;&|()`}]"me=e-1 end="\d[<>]"me=e-2 end="#"me=e-1 contains=@shEchoList skipwhite nextgroup=shQuickComment
  syn region shEchoDeref contained matchgroup=shStatement start="\<print\>" skip="\\$" matchgroup=shEchoDelim end="$" end="[<>;&|()`}]"me=e-1 end="\d[<>]"me=e-2 end="#"me=e-1 contains=@shEchoList skipwhite nextgroup=shQuickComment
@@ -336,6 +341,10 @@
 " an Error under /bin/sh.  By consensus of vimdev'ers!
 if exists("b:is_kornshell") || exists("b:is_bash") || exists("b:is_posix")
  syn region shCommandSub matchgroup=shCmdSubRegion start="\$(\ze[^(]"  skip='\\\\\|\\.' end=")"  contains=@shCommandSubList
+ if exists("b:is_kornshell")
+  syn region shSubshare matchgroup=shCmdSubRegion start="\${\ze[ \t\n<]"  skip='\\\\\|\\.' end="\zs[ \t\n;]}"  contains=@shCommandSubList
+  syn region shValsub matchgroup=shCmdSubRegion start="\${|"  skip='\\\\\|\\.' end="}"  contains=@shCommandSubList
+ endif
  syn region shArithmetic matchgroup=shArithRegion  start="\$((" skip='\\\\\|\\.' end="))" contains=@shArithList
  syn region shArithmetic matchgroup=shArithRegion  start="\$\[" skip='\\\\\|\\.' end="\]" contains=@shArithList
  syn match  shSkipInitWS contained	"^\s\+"
@@ -491,7 +500,11 @@
  syn match  shDerefWordError	"[^}$[~]"	contained
 endif
 syn match  shDerefSimple	"\$\%(\h\w*\|\d\)"	nextgroup=@shNoZSList
-syn region shDeref	matchgroup=PreProc start="\${" end="}"	contains=@shDerefList,shDerefVarArray nextgroup=shSpecialStart
+if exists("b:is_kornshell")
+ syn region shDeref	matchgroup=PreProc start="\${\ze[^ \t\n<|]" end="}"	contains=@shDerefList,shDerefVarArray nextgroup=shSpecialStart
+else
+ syn region shDeref	matchgroup=PreProc start="\${" end="}"			contains=@shDerefList,shDerefVarArray nextgroup=shSpecialStart
+endif
 syn match  shDerefSimple	"\$[-#*@!?]"	nextgroup=@shNoZSList
 syn match  shDerefSimple	"\$\$"	nextgroup=@shNoZSList
 syn match  shDerefSimple	"\${\d}"	nextgroup=@shNoZSList	nextgroup=shSpecialStart
@@ -754,6 +767,8 @@
  hi def link shSnglCase		Statement
  hi def link shCommandSub		Special
  hi def link shCommandSubBQ		shCommandSub
+ hi def link shSubshare		shCommandSub
+ hi def link shValsub		shCommandSub
  hi def link shComment		Comment
  hi def link shConditional		Conditional
  hi def link shCtrlSeq		Special
diff --git a/runtime/syntax/testdir/dumps/sh_10_00.dump b/runtime/syntax/testdir/dumps/sh_10_00.dump
new file mode 100644
index 0000000..b0c98ea
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/sh_10_00.dump
@@ -0,0 +1,20 @@
+>#+0#0000e05#ffffff0|!|/|b|i|n|/|k|s|h| +0#0000000&@64
+@75
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+|#+0#0000e05&| |c|o|m@1|a|n|d| |s|u|b|s|t|i|t|u|t|i|o|n|s| |(|s|u|b|s|h|a|r|e|s|)| |a|n|d| |m|k|s|h| |v|a|l|u|e| +0#0000000&@24
+|#+0#0000e05&| |s|u|b|s|t|i|t|u|t|i|o|n|s| |(|v|a|l|s|u|b|s|)|.| +0#0000000&@48
+@75
+|#+0#0000e05&| |=@5| +0#0000000&@66
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+|}+0#e000e06&| +0#0000000&@73
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+|i|s|_|k|o|r|n|s|h|e|l@1|:| |1|,| @40|1|,|1| @10|T|o|p| 
diff --git a/runtime/syntax/testdir/dumps/sh_10_01.dump b/runtime/syntax/testdir/dumps/sh_10_01.dump
new file mode 100644
index 0000000..c1d3531
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/sh_10_01.dump
@@ -0,0 +1,20 @@
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+|#+0#0000e05&| |s|u|p@1|o|r|t|e|d| |b|y| |m|k|s|h|,| |n|o|t| |k|s|h|9|3|.| +0#0000000&@43
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+@8|u+0#00e0e07&|n|l|u|c|k|y|=+0#0000000&|$+0#e000e06&|{|||v|a|l|s|u|b|f|u|n|c| |t|h|i|r|t|e@1|n| +0#0000000&@36
+@57|1|9|,|1| @9|4|3|%| 
diff --git a/runtime/syntax/testdir/dumps/sh_10_02.dump b/runtime/syntax/testdir/dumps/sh_10_02.dump
new file mode 100644
index 0000000..e03c3f8
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/sh_10_02.dump
@@ -0,0 +1,20 @@
+| +0&#ffffff0@7|u+0#00e0e07&|n|l|u|c|k|y|=+0#0000000&|$+0#e000e06&|{|||v|a|l|s|u|b|f|u|n|c| |t|h|i|r|t|e@1|n| +0#0000000&@36
+|}+0#e000e06&| +0#0000000&@73
+@8|t+0#af5f00255&|y|p|e|s|e|t| +0#0000000&|n+0#00e0e07&|o|t|a|f|l|o|a|t|=+0#0000000&|$+0#e000e06&|{|||v|a|l|s|u|b|f|u|n|c| |n|o|t|a|n|u|m|b|e|r| @5|}| +0#0000000&@17
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+@8|$+0#e000e06&|{|||e+0#af5f00255&|c|h|o| +0#e000002&|f|o@1|}+0#e000e06&| +0#0000000&@54
+@8>$+0#e000e06&|{|||e+0#af5f00255&|c|h|o| +0#e000002&|b|a|r| +0#0000000&@55
+|}+0#e000e06&| +0#0000000&@73
+|f+0#af5f00255&|i| +0#0000000&@72
+@75
+|#+0#0000e05&| |=@5| +0#0000000&@66
+|#+0#0000e05&| |S|h|a|r|e|d|-|s|t|a|t|e| |c|o|m@1|a|n|d| |s|u|b|s|t|i|t|u|t|i|o|n|s| |u|s|i|n|g| |t|h|e| |s|y|n|t|a|x| |$|{|<|f|i|l|e|;|}| +0#0000000&@11
+|#+0#0000e05&| |a|r|e| |o|n|l|y| |s|u|p@1|o|r|t|e|d| |b|y| |k|s|h|9|3|,| |n|o|t| |m|k|s|h|.| +0#0000000&@34
+|e+0#af5f00255&|c|h|o| +0#e000002&|$+0#e000e06&|{| +0#0000000&@67
+| +0#e000e06&@7|p+0#af5f00255&|r|i|n|t|f| +0#e000e06&|%|s| |s|t|r| +0#0000000&@53
+|}+0#e000e06&| +0#e000002&|>+0#af5f00255&| +0#0000000&|/|t|m|p|/|s|t|r|f|i|l|e| @58
+|e+0#af5f00255&|c|h|o| +0#e000002&|$+0#e000e06&|{|<+0#af5f00255&|/+0#e000e06&|t|m|p|/|s|t|r|f|i|l|e|;|}| +0#0000000&@52
+@75
+|e+0#af5f00255&|x|i|t| +0#0000000&|0+0#e000002&| +0#0000000&@68
+|~+0#4040ff13&| @73
+| +0#0000000&@56|3|7|,|2|-|9| @7|B|o|t| 
diff --git a/runtime/syntax/testdir/dumps/sh_10_99.dump b/runtime/syntax/testdir/dumps/sh_10_99.dump
new file mode 100644
index 0000000..f97ea32
--- /dev/null
+++ b/runtime/syntax/testdir/dumps/sh_10_99.dump
@@ -0,0 +1,20 @@
+| +0&#ffffff0@7|p+0#af5f00255&|r|i|n|t|f| +0#0000000&|'+0#af5f00255&|%+0#e000002&|s|'+0#af5f00255&| +0#0000000&|"+0#af5f00255&|$+0#e000e06&|{|||v|a|l|s|u|b|f|u|n|c| |t|w|e|l|v|e| @6|}|"+0#af5f00255&| +0#0000000&@24
+@8|u+0#00e0e07&|n|l|u|c|k|y|=+0#0000000&|$+0#e000e06&|{|||v|a|l|s|u|b|f|u|n|c| |t|h|i|r|t|e@1|n| +0#0000000&@36
+|}+0#e000e06&| +0#0000000&@73
+@8|t+0#af5f00255&|y|p|e|s|e|t| +0#0000000&|n+0#00e0e07&|o|t|a|f|l|o|a|t|=+0#0000000&|$+0#e000e06&|{|||v|a|l|s|u|b|f|u|n|c| |n|o|t|a|n|u|m|b|e|r| @5|}| +0#0000000&@17
+@8|p+0#af5f00255&|r|i|n|t| +0#e000002&|$+0#e000e06&|u|n|l|u|c|k|y| +0#e000002&|$+0#e000e06&|n|o|t|a|n|u|m|b|e|r| +0#0000000&@40
+@8|$+0#e000e06&|{|||e+0#af5f00255&|c|h|o| +0#e000002&|f|o@1|}+0#e000e06&| +0#0000000&@54
+@8|$+0#e000e06&|{|||e+0#af5f00255&|c|h|o| +0#e000002&|b|a|r| +0#0000000&@55
+|}+0#e000e06&| +0#0000000&@73
+|f+0#af5f00255&|i| +0#0000000&@72
+@75
+|#+0#0000e05&| |=@5| +0#0000000&@66
+|#+0#0000e05&| |S|h|a|r|e|d|-|s|t|a|t|e| |c|o|m@1|a|n|d| |s|u|b|s|t|i|t|u|t|i|o|n|s| |u|s|i|n|g| |t|h|e| |s|y|n|t|a|x| |$|{|<|f|i|l|e|;|}| +0#0000000&@11
+|#+0#0000e05&| |a|r|e| |o|n|l|y| |s|u|p@1|o|r|t|e|d| |b|y| |k|s|h|9|3|,| |n|o|t| |m|k|s|h|.| +0#0000000&@34
+|e+0#af5f00255&|c|h|o| +0#e000002&|$+0#e000e06&|{| +0#0000000&@67
+| +0#e000e06&@7|p+0#af5f00255&|r|i|n|t|f| +0#e000e06&|%|s| |s|t|r| +0#0000000&@53
+|}+0#e000e06&| +0#e000002&|>+0#af5f00255&| +0#0000000&|/|t|m|p|/|s|t|r|f|i|l|e| @58
+|e+0#af5f00255&|c|h|o| +0#e000002&|$+0#e000e06&|{|<+0#af5f00255&|/+0#e000e06&|t|m|p|/|s|t|r|f|i|l|e|;|}| +0#0000000&@52
+@75
+>e+0#af5f00255&|x|i|t| +0#0000000&|0+0#e000002&| +0#0000000&@68
+@57|4|9|,|1| @9|B|o|t| 
diff --git a/runtime/syntax/testdir/input/sh_10.sh b/runtime/syntax/testdir/input/sh_10.sh
new file mode 100644
index 0000000..be463c3
--- /dev/null
+++ b/runtime/syntax/testdir/input/sh_10.sh
@@ -0,0 +1,49 @@
+#!/bin/ksh
+
+# This script is a test file for ksh93 shared-state
+# command substitutions (subshares) and mksh value
+# substitutions (valsubs).
+
+# ======
+# Below is subshare syntax supported by both ksh93 and mksh.
+print ${ echo one }
+print ${	echo two
+}
+print ${
+echo three	}
+print ${ echo 'four'; }
+print ${ echo 'five' ;}
+print ${ echo 'six'
+}
+print ${	echo 'seven'	}
+echo ${ print 'eight'	}
+typeset nine=${ pwd; }
+
+# ======
+# Value substitutions of the form ${|command} are only
+# supported by mksh, not ksh93.
+if ! command eval '((.sh.version >= 20070703))' 2>/dev/null; then
+	valsubfunc() {
+		REPLY=$1
+	}
+	echo ${|valsubfunc ten}
+	print "${|valsubfunc eleven;}"
+	printf '%s' "${|valsubfunc twelve	}"
+	unlucky=${|valsubfunc thirteen
+}
+	typeset notafloat=${|valsubfunc notanumber	}
+	print $unlucky $notanumber
+	${|echo foo}
+	${|echo bar
+}
+fi
+
+# ======
+# Shared-state command substitutions using the syntax ${<file;}
+# are only supported by ksh93, not mksh.
+echo ${
+	printf %s str
+} > /tmp/strfile
+echo ${</tmp/strfile;}
+
+exit 0