diff --git a/constraint.go b/constraint.go
index edd6b36..6f29605 100644
--- a/constraint.go
+++ b/constraint.go
@@ -1,3 +1,5 @@
+// © 2019-present nextmv.io inc
+
 package mip
 
 import (
diff --git a/doc.go b/doc.go
index ffb3121..9a76774 100644
--- a/doc.go
+++ b/doc.go
@@ -1,3 +1,5 @@
+// © 2019-present nextmv.io inc
+
 /*
 Package mip provides a general interface for solving mixed integer linear
 optimization problems using a variety of back-end solvers. The base interface is
diff --git a/example_constraint_test.go b/example_constraint_test.go
index b6b769e..f03429b 100644
--- a/example_constraint_test.go
+++ b/example_constraint_test.go
@@ -1,3 +1,5 @@
+// © 2019-present nextmv.io inc
+
 package mip_test
 
 import (
diff --git a/example_model_test.go b/example_model_test.go
index b57e063..da2ba30 100644
--- a/example_model_test.go
+++ b/example_model_test.go
@@ -1,3 +1,5 @@
+// © 2019-present nextmv.io inc
+
 package mip_test
 
 import (
diff --git a/example_objective_test.go b/example_objective_test.go
index 0ff70e1..f3354f4 100644
--- a/example_objective_test.go
+++ b/example_objective_test.go
@@ -1,3 +1,5 @@
+// © 2019-present nextmv.io inc
+
 package mip_test
 
 import (
diff --git a/example_var_test.go b/example_var_test.go
index 837afc6..40d9e2c 100644
--- a/example_var_test.go
+++ b/example_var_test.go
@@ -1,3 +1,5 @@
+// © 2019-present nextmv.io inc
+
 package mip_test
 
 import (
diff --git a/model.go b/model.go
index 05a04d6..cd21e57 100644
--- a/model.go
+++ b/model.go
@@ -1,3 +1,5 @@
+// © 2019-present nextmv.io inc
+
 // Package mip holds the implementation of the sdk/mip package.
 package mip
 
diff --git a/model/multimap.go b/model/multimap.go
index 1a2e8c5..96c015c 100644
--- a/model/multimap.go
+++ b/model/multimap.go
@@ -1,3 +1,5 @@
+// © 2019-present nextmv.io inc
+
 // Package model contains modeling functionality.
 package model
 
diff --git a/model/multimap_test.go b/model/multimap_test.go
index 12dbeb5..7126fdf 100644
--- a/model/multimap_test.go
+++ b/model/multimap_test.go
@@ -1,3 +1,5 @@
+// © 2019-present nextmv.io inc
+
 package model_test
 
 import (
diff --git a/objective.go b/objective.go
index a6d538c..559cdac 100644
--- a/objective.go
+++ b/objective.go
@@ -1,3 +1,5 @@
+// © 2019-present nextmv.io inc
+
 package mip
 
 import (
diff --git a/options.go b/options.go
index 75b8c5a..7016287 100644
--- a/options.go
+++ b/options.go
@@ -1,3 +1,5 @@
+// © 2019-present nextmv.io inc
+
 package mip
 
 import (
diff --git a/options_test.go b/options_test.go
index 6091ef9..2fc527c 100644
--- a/options_test.go
+++ b/options_test.go
@@ -1,3 +1,5 @@
+// © 2019-present nextmv.io inc
+
 package mip_test
 
 import (
diff --git a/solution.go b/solution.go
index 7adc895..b8aa1fc 100644
--- a/solution.go
+++ b/solution.go
@@ -1,3 +1,5 @@
+// © 2019-present nextmv.io inc
+
 package mip
 
 import "time"
diff --git a/solution_format.go b/solution_format.go
index d2ba1ca..50a9c9c 100644
--- a/solution_format.go
+++ b/solution_format.go
@@ -1,3 +1,5 @@
+// © 2019-present nextmv.io inc
+
 package mip
 
 import (
diff --git a/solver.go b/solver.go
index f052d18..95ec7b4 100644
--- a/solver.go
+++ b/solver.go
@@ -1,3 +1,5 @@
+// © 2019-present nextmv.io inc
+
 package mip
 
 // Solver for a MIP problem.
diff --git a/term.go b/term.go
index b79c861..8c2a8e5 100644
--- a/term.go
+++ b/term.go
@@ -1,3 +1,5 @@
+// © 2019-present nextmv.io inc
+
 package mip
 
 import (
diff --git a/var.go b/var.go
index 536360e..8cb0efd 100644
--- a/var.go
+++ b/var.go
@@ -1,3 +1,5 @@
+// © 2019-present nextmv.io inc
+
 package mip
 
 import (