diff --git a/Library/Homebrew/cmd/list.rb b/Library/Homebrew/cmd/list.rb
index 619bc49feb..b55cfb10f9 100644
--- a/Library/Homebrew/cmd/list.rb
+++ b/Library/Homebrew/cmd/list.rb
@@ -7,6 +7,7 @@ require "formula"
 require "cli/parser"
 require "cask/list"
 require "system_command"
+require "tab"
 
 module Homebrew
   module Cmd
@@ -36,6 +37,11 @@ module Homebrew
         switch "--pinned",
                description: "List only pinned formulae, or only the specified (pinned) " \
                             "formulae if <formula> are provided. See also `pin`, `unpin`."
+        switch "--installed-on-request",
+               description: "List the formulae installed on request."
+        switch "--installed-as-dependency",
+               description: "List the formulae installed as dependencies."
+
         # passed through to ls
         switch "-1",
                description: "Force output to be one entry per line. " \
@@ -54,11 +60,18 @@ module Homebrew
         conflicts "--pinned", "--cask"
         conflicts "--multiple", "--cask"
         conflicts "--pinned", "--multiple"
+        ["--installed-on-request", "--installed-as-dependency"].each do |flag|
+          conflicts "--cask", flag
+          conflicts "--versions", flag
+          conflicts "--pinned", flag
+        end
         ["-1", "-l", "-r", "-t"].each do |flag|
           conflicts "--versions", flag
           conflicts "--pinned", flag
         end
-        ["--versions", "--pinned", "-l", "-r", "-t"].each do |flag|
+        ["--versions", "--pinned",
+         "---installed-on-request", "--installed-as-dependency",
+         "-l", "-r", "-t"].each do |flag|
           conflicts "--full-name", flag
         end
 
@@ -91,6 +104,28 @@ module Homebrew
         elsif args.versions?
           filtered_list unless args.cask?
           list_casks if args.cask? || (!args.formula? && !args.multiple? && args.no_named?)
+        elsif args.installed_on_request? || args.installed_as_dependency?
+          unless args.no_named?
+            raise UsageError,
+                  "Cannot use `--installed-on-request` or " \
+                  "`--installed-as-dependency` with formula arguments."
+          end
+
+          Formula.installed.sort.each do |formula|
+            tab = Tab.for_formula(formula)
+
+            if args.installed_on_request? && args.installed_as_dependency?
+              statuses = []
+              statuses << "installed on request" if tab.installed_on_request
+              statuses << "installed as dependency" if tab.installed_as_dependency
+              next if statuses.empty?
+
+              puts "#{formula.name}: #{statuses.join(", ")}"
+            elsif (args.installed_on_request? && tab.installed_on_request) ||
+                  (args.installed_as_dependency? && tab.installed_as_dependency)
+              puts formula.name
+            end
+          end
         elsif args.no_named?
           ENV["CLICOLOR"] = nil
 
diff --git a/Library/Homebrew/sorbet/rbi/dsl/homebrew/cmd/list.rbi b/Library/Homebrew/sorbet/rbi/dsl/homebrew/cmd/list.rbi
index 30f707efbb..5e9ea56337 100644
--- a/Library/Homebrew/sorbet/rbi/dsl/homebrew/cmd/list.rbi
+++ b/Library/Homebrew/sorbet/rbi/dsl/homebrew/cmd/list.rbi
@@ -25,6 +25,12 @@ class Homebrew::Cmd::List::Args < Homebrew::CLI::Args
   sig { returns(T::Boolean) }
   def full_name?; end
 
+  sig { returns(T::Boolean) }
+  def installed_as_dependency?; end
+
+  sig { returns(T::Boolean) }
+  def installed_on_request?; end
+
   sig { returns(T::Boolean) }
   def l?; end
 
diff --git a/Library/Homebrew/test/sorbet/tapioca/compilers/args_spec.rb b/Library/Homebrew/test/sorbet/tapioca/compilers/args_spec.rb
index e12cadbb49..c160203735 100644
--- a/Library/Homebrew/test/sorbet/tapioca/compilers/args_spec.rb
+++ b/Library/Homebrew/test/sorbet/tapioca/compilers/args_spec.rb
@@ -19,8 +19,10 @@ RSpec.describe Tapioca::Compilers::Args do
   describe "#args_table" do
     it "returns a mapping of list args to default values" do
       expect(compiler.args_table(list_parser).keys).to contain_exactly(
-        :"1?", :cask?, :casks?, :d?, :debug?, :formula?, :formulae?, :full_name?, :h?, :help?, :l?, :multiple?,
-        :pinned?, :q?, :quiet?, :r?, :t?, :v?, :verbose?, :versions?
+        :"1?", :cask?, :casks?, :d?, :debug?, :formula?, :formulae?,
+        :full_name?, :h?, :help?, :installed_as_dependency?,
+        :installed_on_request?, :l?, :multiple?, :pinned?,
+        :q?, :quiet?, :r?, :t?, :v?, :verbose?, :versions?
       )
     end
 
diff --git a/completions/bash/brew b/completions/bash/brew
index a49d1553e8..967363f593 100644
--- a/completions/bash/brew
+++ b/completions/bash/brew
@@ -1422,6 +1422,8 @@ _brew_list() {
       --formula
       --full-name
       --help
+      --installed-as-dependency
+      --installed-on-request
       --multiple
       --pinned
       --quiet
@@ -1524,6 +1526,8 @@ _brew_ls() {
       --formula
       --full-name
       --help
+      --installed-as-dependency
+      --installed-on-request
       --multiple
       --pinned
       --quiet
diff --git a/completions/fish/brew.fish b/completions/fish/brew.fish
index 50517e001f..e8ab276a78 100644
--- a/completions/fish/brew.fish
+++ b/completions/fish/brew.fish
@@ -997,6 +997,8 @@ __fish_brew_complete_arg 'list' -l debug -d 'Display any debugging information'
 __fish_brew_complete_arg 'list' -l formula -d 'List only formulae, or treat all named arguments as formulae'
 __fish_brew_complete_arg 'list' -l full-name -d 'Print formulae with fully-qualified names. Unless `--full-name`, `--versions` or `--pinned` are passed, other options (i.e. `-1`, `-l`, `-r` and `-t`) are passed to `ls`(1) which produces the actual output'
 __fish_brew_complete_arg 'list' -l help -d 'Show this message'
+__fish_brew_complete_arg 'list' -l installed-as-dependency -d 'List the formulae installed as dependencies'
+__fish_brew_complete_arg 'list' -l installed-on-request -d 'List the formulae installed on request'
 __fish_brew_complete_arg 'list' -l multiple -d 'Only show formulae with multiple versions installed'
 __fish_brew_complete_arg 'list' -l pinned -d 'List only pinned formulae, or only the specified (pinned) formulae if formula are provided. See also `pin`, `unpin`'
 __fish_brew_complete_arg 'list' -l quiet -d 'Make some output more quiet'
@@ -1063,6 +1065,8 @@ __fish_brew_complete_arg 'ls' -l debug -d 'Display any debugging information'
 __fish_brew_complete_arg 'ls' -l formula -d 'List only formulae, or treat all named arguments as formulae'
 __fish_brew_complete_arg 'ls' -l full-name -d 'Print formulae with fully-qualified names. Unless `--full-name`, `--versions` or `--pinned` are passed, other options (i.e. `-1`, `-l`, `-r` and `-t`) are passed to `ls`(1) which produces the actual output'
 __fish_brew_complete_arg 'ls' -l help -d 'Show this message'
+__fish_brew_complete_arg 'ls' -l installed-as-dependency -d 'List the formulae installed as dependencies'
+__fish_brew_complete_arg 'ls' -l installed-on-request -d 'List the formulae installed on request'
 __fish_brew_complete_arg 'ls' -l multiple -d 'Only show formulae with multiple versions installed'
 __fish_brew_complete_arg 'ls' -l pinned -d 'List only pinned formulae, or only the specified (pinned) formulae if formula are provided. See also `pin`, `unpin`'
 __fish_brew_complete_arg 'ls' -l quiet -d 'Make some output more quiet'
diff --git a/completions/zsh/_brew b/completions/zsh/_brew
index 754ca3f7d2..1253d2becb 100644
--- a/completions/zsh/_brew
+++ b/completions/zsh/_brew
@@ -1234,13 +1234,15 @@ _brew_linkage() {
 _brew_list() {
   _arguments \
     '--debug[Display any debugging information]' \
-    '(--versions --pinned --l --r --t)--full-name[Print formulae with fully-qualified names. Unless `--full-name`, `--versions` or `--pinned` are passed, other options (i.e. `-1`, `-l`, `-r` and `-t`) are passed to `ls`(1) which produces the actual output]' \
+    '(--versions --pinned ---installed-on-request --installed-as-dependency --l --r --t)--full-name[Print formulae with fully-qualified names. Unless `--full-name`, `--versions` or `--pinned` are passed, other options (i.e. `-1`, `-l`, `-r` and `-t`) are passed to `ls`(1) which produces the actual output]' \
     '--help[Show this message]' \
+    '(--cask --versions --pinned --full-name)--installed-as-dependency[List the formulae installed as dependencies]' \
+    '(--cask --versions --pinned)--installed-on-request[List the formulae installed on request]' \
     '(--cask --pinned)--multiple[Only show formulae with multiple versions installed]' \
-    '(--cask --multiple --1 --l --r --t --full-name)--pinned[List only pinned formulae, or only the specified (pinned) formulae if formula are provided. See also `pin`, `unpin`]' \
+    '(--cask --multiple --installed-on-request --installed-as-dependency --1 --l --r --t --full-name)--pinned[List only pinned formulae, or only the specified (pinned) formulae if formula are provided. See also `pin`, `unpin`]' \
     '--quiet[Make some output more quiet]' \
     '--verbose[Make some output more verbose]' \
-    '(--1 --l --r --t --full-name)--versions[Show the version number for installed formulae, or only the specified formulae if formula are provided]' \
+    '(--installed-on-request --installed-as-dependency --1 --l --r --t --full-name)--versions[Show the version number for installed formulae, or only the specified formulae if formula are provided]' \
     '-1[Force output to be one entry per line. This is the default when output is not to a terminal]' \
     '-l[List formulae and/or casks in long format. Has no effect when a formula or cask name is passed as an argument]' \
     '-r[Reverse the order of the formulae and/or casks sort to list the oldest entries first. Has no effect when a formula or cask name is passed as an argument]' \
@@ -1249,7 +1251,7 @@ _brew_list() {
     '(--cask)--formula[List only formulae, or treat all named arguments as formulae]' \
     '*::installed_formula:__brew_installed_formulae' \
     - installed_cask \
-    '(--formula --pinned --multiple)--cask[List only casks, or treat all named arguments as casks]' \
+    '(--formula --pinned --multiple --installed-on-request --installed-as-dependency)--cask[List only casks, or treat all named arguments as casks]' \
     '*::installed_cask:__brew_installed_casks'
 }
 
@@ -1315,13 +1317,15 @@ _brew_log() {
 _brew_ls() {
   _arguments \
     '--debug[Display any debugging information]' \
-    '(--versions --pinned --l --r --t)--full-name[Print formulae with fully-qualified names. Unless `--full-name`, `--versions` or `--pinned` are passed, other options (i.e. `-1`, `-l`, `-r` and `-t`) are passed to `ls`(1) which produces the actual output]' \
+    '(--versions --pinned ---installed-on-request --installed-as-dependency --l --r --t)--full-name[Print formulae with fully-qualified names. Unless `--full-name`, `--versions` or `--pinned` are passed, other options (i.e. `-1`, `-l`, `-r` and `-t`) are passed to `ls`(1) which produces the actual output]' \
     '--help[Show this message]' \
+    '(--cask --versions --pinned --full-name)--installed-as-dependency[List the formulae installed as dependencies]' \
+    '(--cask --versions --pinned)--installed-on-request[List the formulae installed on request]' \
     '(--cask --pinned)--multiple[Only show formulae with multiple versions installed]' \
-    '(--cask --multiple --1 --l --r --t --full-name)--pinned[List only pinned formulae, or only the specified (pinned) formulae if formula are provided. See also `pin`, `unpin`]' \
+    '(--cask --multiple --installed-on-request --installed-as-dependency --1 --l --r --t --full-name)--pinned[List only pinned formulae, or only the specified (pinned) formulae if formula are provided. See also `pin`, `unpin`]' \
     '--quiet[Make some output more quiet]' \
     '--verbose[Make some output more verbose]' \
-    '(--1 --l --r --t --full-name)--versions[Show the version number for installed formulae, or only the specified formulae if formula are provided]' \
+    '(--installed-on-request --installed-as-dependency --1 --l --r --t --full-name)--versions[Show the version number for installed formulae, or only the specified formulae if formula are provided]' \
     '-1[Force output to be one entry per line. This is the default when output is not to a terminal]' \
     '-l[List formulae and/or casks in long format. Has no effect when a formula or cask name is passed as an argument]' \
     '-r[Reverse the order of the formulae and/or casks sort to list the oldest entries first. Has no effect when a formula or cask name is passed as an argument]' \
@@ -1330,7 +1334,7 @@ _brew_ls() {
     '(--cask)--formula[List only formulae, or treat all named arguments as formulae]' \
     '*::installed_formula:__brew_installed_formulae' \
     - installed_cask \
-    '(--formula --pinned --multiple)--cask[List only casks, or treat all named arguments as casks]' \
+    '(--formula --pinned --multiple --installed-on-request --installed-as-dependency)--cask[List only casks, or treat all named arguments as casks]' \
     '*::installed_cask:__brew_installed_casks'
 }
 
diff --git a/docs/Manpage.md b/docs/Manpage.md
index 7978b22cf6..dedea4a587 100644
--- a/docs/Manpage.md
+++ b/docs/Manpage.md
@@ -749,6 +749,14 @@ paths within its current keg. If *`cask`* is provided, list its artifacts.
 : List only pinned formulae, or only the specified (pinned) formulae if
   *`formula`* are provided. See also `pin`, `unpin`.
 
+`--installed-on-request`
+
+: List the formulae installed on request.
+
+`--installed-as-dependency`
+
+: List the formulae installed as dependencies.
+
 `-1`
 
 : Force output to be one entry per line. This is the default when output is not
diff --git a/manpages/brew.1 b/manpages/brew.1
index 6cd41fcf67..c4fbadc865 100644
--- a/manpages/brew.1
+++ b/manpages/brew.1
@@ -470,6 +470,12 @@ Only show formulae with multiple versions installed\.
 \fB\-\-pinned\fP
 List only pinned formulae, or only the specified (pinned) formulae if \fIformula\fP are provided\. See also \fBpin\fP, \fBunpin\fP\&\.
 .TP
+\fB\-\-installed\-on\-request\fP
+List the formulae installed on request\.
+.TP
+\fB\-\-installed\-as\-dependency\fP
+List the formulae installed as dependencies\.
+.TP
 \fB\-1\fP
 Force output to be one entry per line\. This is the default when output is not to a terminal\.
 .TP