diff --git a/docs/openttd.6 b/docs/openttd.6
index 0319f98cc8..9e8ff63b34 100644
--- a/docs/openttd.6
+++ b/docs/openttd.6
@@ -20,7 +20,6 @@
 .Op Fl M Ar musicset
 .Op Fl n Ar host Ns Oo : Ns Ar port Oc Ns Op # Ns Ar company
 .Op Fl p Ar password
-.Op Fl P Ar password
 .Op Fl q Ar savegame
 .Op Fl r Ar width Ns x Ns Ar height
 .Op Fl s Ar driver
@@ -100,10 +99,6 @@ play as.
 Password used to join server.
 Only useful with
 .Fl n .
-.It Fl P Ar password
-Password used to join company.
-Only useful with
-.Fl n .
 .It Fl q Ar savegame
 Write some information about the specified savegame and exit.
 .It Fl Q
diff --git a/src/network/network.cpp b/src/network/network.cpp
index 04e201ded2..adee472d6e 100644
--- a/src/network/network.cpp
+++ b/src/network/network.cpp
@@ -831,7 +831,7 @@ public:
 
 /**
  * Join a client to the server at with the given connection string.
- * The default for the passwords is \c nullptr. When the server or company needs a
+ * The default for the passwords is \c nullptr. When the server needs a
  * password and none is given, the user is asked to enter the password in the GUI.
  * This function will return false whenever some information required to join is not
  * correct such as the company number or the client's name, or when there is not
@@ -843,10 +843,9 @@ public:
  * @param connection_string     The IP address, port and company number to join as.
  * @param default_company       The company number to join as when none is given.
  * @param join_server_password  The password for the server.
- * @param join_company_password The password for the company.
  * @return Whether the join has started.
  */
-bool NetworkClientConnectGame(const std::string &connection_string, CompanyID default_company, const std::string &join_server_password, const std::string &join_company_password)
+bool NetworkClientConnectGame(const std::string &connection_string, CompanyID default_company, const std::string &join_server_password)
 {
 	Debug(net, 9, "NetworkClientConnectGame(): connection_string={}", connection_string);
 
@@ -859,7 +858,6 @@ bool NetworkClientConnectGame(const std::string &connection_string, CompanyID de
 	_network_join.connection_string = resolved_connection_string;
 	_network_join.company = join_as;
 	_network_join.server_password = join_server_password;
-	_network_join.company_password = join_company_password;
 
 	if (_game_mode == GM_MENU) {
 		/* From the menu we can immediately continue with the actual join. */
diff --git a/src/network/network_client.h b/src/network/network_client.h
index 0c2dda37eb..47fb81b3cd 100644
--- a/src/network/network_client.h
+++ b/src/network/network_client.h
@@ -112,7 +112,6 @@ struct NetworkJoinInfo {
 	std::string connection_string; ///< The address of the server to join.
 	CompanyID company;             ///< The company to join.
 	std::string server_password;   ///< The password of the server to join.
-	std::string company_password;  ///< The password of the company to join.
 };
 
 extern NetworkJoinInfo _network_join;
diff --git a/src/network/network_func.h b/src/network/network_func.h
index e4a43be710..485ecfcdb1 100644
--- a/src/network/network_func.h
+++ b/src/network/network_func.h
@@ -49,7 +49,7 @@ void NetworkPopulateCompanyStats(NetworkCompanyStats *stats);
 
 void NetworkUpdateClientInfo(ClientID client_id);
 void NetworkClientsToSpectators(CompanyID cid);
-bool NetworkClientConnectGame(const std::string &connection_string, CompanyID default_company, const std::string &join_server_password = "", const std::string &join_company_password = "");
+bool NetworkClientConnectGame(const std::string &connection_string, CompanyID default_company, const std::string &join_server_password = "");
 void NetworkClientJoinGame();
 void NetworkClientRequestMove(CompanyID company, const std::string &pass = "");
 void NetworkClientSendRcon(const std::string &password, const std::string &command);
diff --git a/src/openttd.cpp b/src/openttd.cpp
index 10f7e0727b..4d1c048922 100644
--- a/src/openttd.cpp
+++ b/src/openttd.cpp
@@ -168,7 +168,6 @@ static void ShowHelp()
 		"  -G seed             = Set random seed\n"
 		"  -n host[:port][#company]= Join network game\n"
 		"  -p password         = Password to join server\n"
-		"  -P password         = Password to join company\n"
 		"  -D [host][:port]    = Start dedicated server\n"
 #if !defined(_WIN32)
 		"  -f                  = Fork into the background (dedicated only)\n"
@@ -384,7 +383,6 @@ struct AfterNewGRFScan : NewGRFScanCallback {
 	uint16_t dedicated_port = 0;                  ///< Port for the dedicated server.
 	std::string connection_string;              ///< Information about the server to connect to
 	std::string join_server_password;           ///< The password to join the server with.
-	std::string join_company_password;          ///< The password to join the company with.
 	bool save_config = true;                    ///< The save config setting.
 
 	/**
@@ -448,7 +446,7 @@ struct AfterNewGRFScan : NewGRFScanCallback {
 			LoadIntroGame();
 			_switch_mode = SM_NONE;
 
-			NetworkClientConnectGame(connection_string, COMPANY_NEW_COMPANY, join_server_password, join_company_password);
+			NetworkClientConnectGame(connection_string, COMPANY_NEW_COMPANY, join_server_password);
 		}
 
 		/* After the scan we're not used anymore. */
@@ -485,7 +483,7 @@ static std::vector<OptionData> CreateOptions()
 {
 	std::vector<OptionData> options;
 	/* Options that require a parameter. */
-	for (char c : "GIMPSbcmnpqrstv") options.push_back({ .type = ODF_HAS_VALUE, .id = c, .shortname = c });
+	for (char c : "GIMSbcmnpqrstv") options.push_back({ .type = ODF_HAS_VALUE, .id = c, .shortname = c });
 #if !defined(_WIN32)
 	options.push_back({ .type = ODF_HAS_VALUE, .id = 'f', .shortname = 'f' });
 #endif
@@ -558,9 +556,6 @@ int openttd_main(std::span<char * const> arguments)
 		case 'p':
 			scanner->join_server_password = mgo.opt;
 			break;
-		case 'P':
-			scanner->join_company_password = mgo.opt;
-			break;
 		case 'r': ParseResolution(&resolution, mgo.opt); break;
 		case 't': scanner->startyear = atoi(mgo.opt); break;
 		case 'd': {