diff --git a/src/company_func.h b/src/company_func.h
new file mode 100644
--- /dev/null
+++ b/src/company_func.h
@@ -0,0 +1,49 @@
+/* $Id$ */
+
+/** @file company_func.h Functions related to companies. */
+
+#ifndef COMPANY_FUNC_H
+#define COMPANY_FUNC_H
+
+#include "core/math_func.hpp"
+#include "company_type.h"
+#include "tile_type.h"
+#include "strings_type.h"
+
+void ChangeOwnershipOfCompanyItems(Owner old_owner, Owner new_owner);
+void GetNameOfOwner(Owner owner, TileIndex tile);
+void SetLocalCompany(CompanyID new_company);
+
+extern CompanyByte _local_company;
+extern CompanyByte _current_company;
+
+extern byte _company_colours[MAX_COMPANIES];     ///< NOSAVE: can be determined from company structs
+extern CompanyManagerFace _company_manager_face; ///< for company manager face storage in openttd.cfg
+
+bool IsHumanCompany(CompanyID company);
+
+static inline bool IsLocalCompany()
+{
+	return _local_company == _current_company;
+}
+
+static inline bool IsInteractiveCompany(CompanyID company)
+{
+	return company == _local_company;
+}
+
+
+
+struct HighScore {
+	char company[100];
+	StringID title; ///< NOSAVE, has troubles with changing string-numbers.
+	uint16 score;   ///< do NOT change type, will break hs.dat
+};
+
+extern HighScore _highscore_table[5][5]; // 4 difficulty-settings (+ network); top 5
+void SaveToHighScore();
+void LoadFromHighScore();
+int8 SaveHighScoreValue(const Company *p);
+int8 SaveHighScoreValueNetwork();
+
+#endif /* COMPANY_FUNC_H */