diff --git a/zipline/gens/tradesimulation.py b/zipline/gens/tradesimulation.py
index 6400a5e6..819b21d6 100644
--- a/zipline/gens/tradesimulation.py
+++ b/zipline/gens/tradesimulation.py
@@ -1,3 +1,19 @@
+#
+# Copyright 2012 Quantopian, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
 from logbook import Logger, Processor
 
 from datetime import datetime
diff --git a/zipline/gens/transform.py b/zipline/gens/transform.py
index ae355e7e..c9e455a5 100644
--- a/zipline/gens/transform.py
+++ b/zipline/gens/transform.py
@@ -1,3 +1,19 @@
+#
+# Copyright 2012 Quantopian, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
 """
 Generator versions of transforms.
 """
diff --git a/zipline/gens/utils.py b/zipline/gens/utils.py
index 7dc44c57..63aa8197 100644
--- a/zipline/gens/utils.py
+++ b/zipline/gens/utils.py
@@ -1,3 +1,19 @@
+#
+# Copyright 2012 Quantopian, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
 import pytz
 import numbers
 
diff --git a/zipline/gens/vwap.py b/zipline/gens/vwap.py
index 9d908b46..bf8bad9e 100644
--- a/zipline/gens/vwap.py
+++ b/zipline/gens/vwap.py
@@ -1,3 +1,19 @@
+#
+# Copyright 2012 Quantopian, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
 from numbers import Number
 from collections import defaultdict
 
diff --git a/zipline/optimize/__init__.py b/zipline/optimize/__init__.py
index cb12f8fe..38f8d1ea 100644
--- a/zipline/optimize/__init__.py
+++ b/zipline/optimize/__init__.py
@@ -1,3 +1,19 @@
+#
+# Copyright 2012 Quantopian, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
 """
 Thomas's parameter optimization library.
 """
diff --git a/zipline/optimize/algorithms.py b/zipline/optimize/algorithms.py
index 5eee6ecd..3f2efe40 100644
--- a/zipline/optimize/algorithms.py
+++ b/zipline/optimize/algorithms.py
@@ -1,3 +1,19 @@
+#
+# Copyright 2012 Quantopian, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
 from logbook import Logger
 from zipline.algorithm import TradingAlgorithm
 
diff --git a/zipline/optimize/example.py b/zipline/optimize/example.py
index b1aa5e41..cfc9d67d 100644
--- a/zipline/optimize/example.py
+++ b/zipline/optimize/example.py
@@ -1,3 +1,19 @@
+#
+# Copyright 2012 Quantopian, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
 # WARNING: This file is still work in progress and contains rather
 # random code snippets.
 
diff --git a/zipline/optimize/factory.py b/zipline/optimize/factory.py
index 90d65a17..f8aee5e3 100644
--- a/zipline/optimize/factory.py
+++ b/zipline/optimize/factory.py
@@ -1,3 +1,19 @@
+#
+# Copyright 2012 Quantopian, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
 """
 Factory functions to prepare useful data for optimize tests.
 
diff --git a/zipline/protocol.py b/zipline/protocol.py
index 1e9a7cb3..562a18bb 100644
--- a/zipline/protocol.py
+++ b/zipline/protocol.py
@@ -1,3 +1,19 @@
+#
+# Copyright 2012 Quantopian, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
 from utils.protocol_utils import Enum, ndict, namelookup
 
 # Datasource type should completely determine the other fields of a
diff --git a/zipline/test_algorithms.py b/zipline/test_algorithms.py
index cb49a1ad..5d79499b 100644
--- a/zipline/test_algorithms.py
+++ b/zipline/test_algorithms.py
@@ -1,3 +1,19 @@
+#
+# Copyright 2012 Quantopian, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
 """
 Algorithm Protocol
 ===================
diff --git a/zipline/utils/date_utils.py b/zipline/utils/date_utils.py
index 4f8e1e13..50545b0c 100644
--- a/zipline/utils/date_utils.py
+++ b/zipline/utils/date_utils.py
@@ -1,3 +1,19 @@
+#
+# Copyright 2012 Quantopian, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
 from collections import namedtuple
 
 import time
diff --git a/zipline/utils/factory.py b/zipline/utils/factory.py
index 8b97127f..c446501a 100644
--- a/zipline/utils/factory.py
+++ b/zipline/utils/factory.py
@@ -1,3 +1,19 @@
+#
+# Copyright 2012 Quantopian, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
 """
 Factory functions to prepare useful data for tests.
 """
diff --git a/zipline/utils/log_utils.py b/zipline/utils/log_utils.py
index 102c9a7b..f143cfbc 100644
--- a/zipline/utils/log_utils.py
+++ b/zipline/utils/log_utils.py
@@ -1,3 +1,19 @@
+#
+# Copyright 2012 Quantopian, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
 import logbook
 from contextlib import contextmanager
 
diff --git a/zipline/utils/tradingcalendar.py b/zipline/utils/tradingcalendar.py
index da58a3bc..ac2c2638 100644
--- a/zipline/utils/tradingcalendar.py
+++ b/zipline/utils/tradingcalendar.py
@@ -1,3 +1,19 @@
+#
+# Copyright 2012 Quantopian, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
 import pytz
 
 from datetime import datetime
diff --git a/zipline/version.py b/zipline/version.py
index 0244a256..80ee42dc 100644
--- a/zipline/version.py
+++ b/zipline/version.py
@@ -1,3 +1,19 @@
+#
+# Copyright 2012 Quantopian, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
 BANNER = """
 Zipline {version}
 Released under BSD3