diff --git a/.github/dependabot.yaml b/.github/dependabot.yaml
index e45f1e0a4..16cbfb77c 100644
--- a/.github/dependabot.yaml
+++ b/.github/dependabot.yaml
@@ -1,4 +1,4 @@
-# Copyright (c) HashiCorp, Inc.
+# Copyright IBM Corp. 2013, 2025
 # SPDX-License-Identifier: MPL-2.0
 
 version: 2
diff --git a/.golangci.yml b/.golangci.yml
index ec71dad06..5d0a44121 100644
--- a/.golangci.yml
+++ b/.golangci.yml
@@ -1,4 +1,4 @@
-# Copyright (c) HashiCorp, Inc.
+# Copyright IBM Corp. 2013, 2025
 # SPDX-License-Identifier: MPL-2.0
 
 linters:
diff --git a/.release/release-metadata.hcl b/.release/release-metadata.hcl
index 34e5311ee..7e7003979 100644
--- a/.release/release-metadata.hcl
+++ b/.release/release-metadata.hcl
@@ -1,4 +1,4 @@
-# Copyright (c) HashiCorp, Inc.
+# Copyright IBM Corp. 2013, 2025
 # SPDX-License-Identifier: MPL-2.0
 
 url_license = "https://github.com/hashicorp/serf/blob/master/LICENSE"
diff --git a/LICENSE b/LICENSE
index c72625e4c..e3ff754c9 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,4 +1,4 @@
-Copyright (c) 2013 HashiCorp, Inc.
+Copyright IBM Corp. 2013, 2025
 
 Mozilla Public License, version 2.0
 
diff --git a/client/const.go b/client/const.go
index a7b092e9f..b7118e0c4 100644
--- a/client/const.go
+++ b/client/const.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package client
diff --git a/client/rpc_client.go b/client/rpc_client.go
index a1c242ad0..5db1a0e45 100644
--- a/client/rpc_client.go
+++ b/client/rpc_client.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package client
diff --git a/cmd/serf/command/agent/agent.go b/cmd/serf/command/agent/agent.go
index e9c319b0f..d97c61da0 100644
--- a/cmd/serf/command/agent/agent.go
+++ b/cmd/serf/command/agent/agent.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package agent
diff --git a/cmd/serf/command/agent/agent_test.go b/cmd/serf/command/agent/agent_test.go
index cf871e06d..29f348dee 100644
--- a/cmd/serf/command/agent/agent_test.go
+++ b/cmd/serf/command/agent/agent_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package agent
diff --git a/cmd/serf/command/agent/command.go b/cmd/serf/command/agent/command.go
index 13a1357ff..49aea953c 100644
--- a/cmd/serf/command/agent/command.go
+++ b/cmd/serf/command/agent/command.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package agent
diff --git a/cmd/serf/command/agent/command_test.go b/cmd/serf/command/agent/command_test.go
index ee098b754..8317f28f1 100644
--- a/cmd/serf/command/agent/command_test.go
+++ b/cmd/serf/command/agent/command_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package agent
diff --git a/cmd/serf/command/agent/config.go b/cmd/serf/command/agent/config.go
index 47e1a637d..3045974bf 100644
--- a/cmd/serf/command/agent/config.go
+++ b/cmd/serf/command/agent/config.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package agent
diff --git a/cmd/serf/command/agent/config_test.go b/cmd/serf/command/agent/config_test.go
index add6717ce..86018623e 100644
--- a/cmd/serf/command/agent/config_test.go
+++ b/cmd/serf/command/agent/config_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package agent
diff --git a/cmd/serf/command/agent/event_handler.go b/cmd/serf/command/agent/event_handler.go
index bbbff31de..fe05fecfd 100644
--- a/cmd/serf/command/agent/event_handler.go
+++ b/cmd/serf/command/agent/event_handler.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package agent
diff --git a/cmd/serf/command/agent/event_handler_mock.go b/cmd/serf/command/agent/event_handler_mock.go
index 5d533a362..1cc675c93 100644
--- a/cmd/serf/command/agent/event_handler_mock.go
+++ b/cmd/serf/command/agent/event_handler_mock.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package agent
diff --git a/cmd/serf/command/agent/event_handler_test.go b/cmd/serf/command/agent/event_handler_test.go
index faefc04a2..1afa9e05b 100644
--- a/cmd/serf/command/agent/event_handler_test.go
+++ b/cmd/serf/command/agent/event_handler_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package agent
diff --git a/cmd/serf/command/agent/flag_slice_value.go b/cmd/serf/command/agent/flag_slice_value.go
index 0ac053da7..b474f5655 100644
--- a/cmd/serf/command/agent/flag_slice_value.go
+++ b/cmd/serf/command/agent/flag_slice_value.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package agent
diff --git a/cmd/serf/command/agent/flag_slice_value_test.go b/cmd/serf/command/agent/flag_slice_value_test.go
index 905997198..e4cdb8116 100644
--- a/cmd/serf/command/agent/flag_slice_value_test.go
+++ b/cmd/serf/command/agent/flag_slice_value_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package agent
diff --git a/cmd/serf/command/agent/gated_writer.go b/cmd/serf/command/agent/gated_writer.go
index ab72c1b4d..6cb7df1bb 100644
--- a/cmd/serf/command/agent/gated_writer.go
+++ b/cmd/serf/command/agent/gated_writer.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package agent
diff --git a/cmd/serf/command/agent/gated_writer_test.go b/cmd/serf/command/agent/gated_writer_test.go
index 5eb8aa75d..d640dc80b 100644
--- a/cmd/serf/command/agent/gated_writer_test.go
+++ b/cmd/serf/command/agent/gated_writer_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package agent
diff --git a/cmd/serf/command/agent/invoke.go b/cmd/serf/command/agent/invoke.go
index 55fd1cf16..a47948a20 100644
--- a/cmd/serf/command/agent/invoke.go
+++ b/cmd/serf/command/agent/invoke.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package agent
diff --git a/cmd/serf/command/agent/ipc.go b/cmd/serf/command/agent/ipc.go
index 0d4b71afa..7df1cb7b5 100644
--- a/cmd/serf/command/agent/ipc.go
+++ b/cmd/serf/command/agent/ipc.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package agent
diff --git a/cmd/serf/command/agent/ipc_event_stream.go b/cmd/serf/command/agent/ipc_event_stream.go
index ad18c4e32..b2d09f162 100644
--- a/cmd/serf/command/agent/ipc_event_stream.go
+++ b/cmd/serf/command/agent/ipc_event_stream.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package agent
diff --git a/cmd/serf/command/agent/ipc_event_stream_test.go b/cmd/serf/command/agent/ipc_event_stream_test.go
index 6def913ed..04e8b4ba4 100644
--- a/cmd/serf/command/agent/ipc_event_stream_test.go
+++ b/cmd/serf/command/agent/ipc_event_stream_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package agent
diff --git a/cmd/serf/command/agent/ipc_log_stream.go b/cmd/serf/command/agent/ipc_log_stream.go
index ce32bfaee..1d5797af1 100644
--- a/cmd/serf/command/agent/ipc_log_stream.go
+++ b/cmd/serf/command/agent/ipc_log_stream.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package agent
diff --git a/cmd/serf/command/agent/ipc_log_stream_test.go b/cmd/serf/command/agent/ipc_log_stream_test.go
index 47b6b0830..80007d219 100644
--- a/cmd/serf/command/agent/ipc_log_stream_test.go
+++ b/cmd/serf/command/agent/ipc_log_stream_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package agent
diff --git a/cmd/serf/command/agent/ipc_query_response_stream.go b/cmd/serf/command/agent/ipc_query_response_stream.go
index 5a062bfbf..d2f6780eb 100644
--- a/cmd/serf/command/agent/ipc_query_response_stream.go
+++ b/cmd/serf/command/agent/ipc_query_response_stream.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package agent
diff --git a/cmd/serf/command/agent/log_levels.go b/cmd/serf/command/agent/log_levels.go
index 98468b48f..89efbd7fe 100644
--- a/cmd/serf/command/agent/log_levels.go
+++ b/cmd/serf/command/agent/log_levels.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package agent
diff --git a/cmd/serf/command/agent/log_writer.go b/cmd/serf/command/agent/log_writer.go
index fc58a5710..5d4ea2702 100644
--- a/cmd/serf/command/agent/log_writer.go
+++ b/cmd/serf/command/agent/log_writer.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package agent
diff --git a/cmd/serf/command/agent/log_writer_test.go b/cmd/serf/command/agent/log_writer_test.go
index 5b7b6b9a3..bac086660 100644
--- a/cmd/serf/command/agent/log_writer_test.go
+++ b/cmd/serf/command/agent/log_writer_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package agent
diff --git a/cmd/serf/command/agent/mdns.go b/cmd/serf/command/agent/mdns.go
index 57407500f..7bc9aaecf 100644
--- a/cmd/serf/command/agent/mdns.go
+++ b/cmd/serf/command/agent/mdns.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package agent
diff --git a/cmd/serf/command/agent/rpc_client_test.go b/cmd/serf/command/agent/rpc_client_test.go
index 2de3dd305..8d0020b06 100644
--- a/cmd/serf/command/agent/rpc_client_test.go
+++ b/cmd/serf/command/agent/rpc_client_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package agent
diff --git a/cmd/serf/command/agent/syslog.go b/cmd/serf/command/agent/syslog.go
index 85dd6f588..c5d98b046 100644
--- a/cmd/serf/command/agent/syslog.go
+++ b/cmd/serf/command/agent/syslog.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package agent
diff --git a/cmd/serf/command/agent/syslog_test.go b/cmd/serf/command/agent/syslog_test.go
index 16e771be5..4eb3973aa 100644
--- a/cmd/serf/command/agent/syslog_test.go
+++ b/cmd/serf/command/agent/syslog_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package agent
diff --git a/cmd/serf/command/agent/util.go b/cmd/serf/command/agent/util.go
index 5d640089a..f2fed8d0c 100644
--- a/cmd/serf/command/agent/util.go
+++ b/cmd/serf/command/agent/util.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package agent
diff --git a/cmd/serf/command/agent/util_test.go b/cmd/serf/command/agent/util_test.go
index a8ac88295..ac16af262 100644
--- a/cmd/serf/command/agent/util_test.go
+++ b/cmd/serf/command/agent/util_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package agent
diff --git a/cmd/serf/command/event.go b/cmd/serf/command/event.go
index 797bf820e..dcbeee107 100644
--- a/cmd/serf/command/event.go
+++ b/cmd/serf/command/event.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package command
diff --git a/cmd/serf/command/event_test.go b/cmd/serf/command/event_test.go
index 4a76a0481..b5e7f3c70 100644
--- a/cmd/serf/command/event_test.go
+++ b/cmd/serf/command/event_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package command
diff --git a/cmd/serf/command/force_leave.go b/cmd/serf/command/force_leave.go
index dc6bdc5ac..4e2bd7cfe 100644
--- a/cmd/serf/command/force_leave.go
+++ b/cmd/serf/command/force_leave.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package command
diff --git a/cmd/serf/command/force_leave_test.go b/cmd/serf/command/force_leave_test.go
index f1e7bfdf2..071d71639 100644
--- a/cmd/serf/command/force_leave_test.go
+++ b/cmd/serf/command/force_leave_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package command
diff --git a/cmd/serf/command/info.go b/cmd/serf/command/info.go
index bccbb76bc..98841345e 100644
--- a/cmd/serf/command/info.go
+++ b/cmd/serf/command/info.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package command
diff --git a/cmd/serf/command/info_test.go b/cmd/serf/command/info_test.go
index e17d2868e..f5255e177 100644
--- a/cmd/serf/command/info_test.go
+++ b/cmd/serf/command/info_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package command
diff --git a/cmd/serf/command/join.go b/cmd/serf/command/join.go
index cfb6274e5..2d4df754b 100644
--- a/cmd/serf/command/join.go
+++ b/cmd/serf/command/join.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package command
diff --git a/cmd/serf/command/join_test.go b/cmd/serf/command/join_test.go
index 0389da8af..c180a6d52 100644
--- a/cmd/serf/command/join_test.go
+++ b/cmd/serf/command/join_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package command
diff --git a/cmd/serf/command/keygen.go b/cmd/serf/command/keygen.go
index 06d4099a4..8dc68ea72 100644
--- a/cmd/serf/command/keygen.go
+++ b/cmd/serf/command/keygen.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package command
diff --git a/cmd/serf/command/keygen_test.go b/cmd/serf/command/keygen_test.go
index 1c4f5f42a..b10232d5c 100644
--- a/cmd/serf/command/keygen_test.go
+++ b/cmd/serf/command/keygen_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package command
diff --git a/cmd/serf/command/keys.go b/cmd/serf/command/keys.go
index cc957c53c..ff7985a5a 100644
--- a/cmd/serf/command/keys.go
+++ b/cmd/serf/command/keys.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package command
diff --git a/cmd/serf/command/keys_test.go b/cmd/serf/command/keys_test.go
index 1b35df649..db83c240d 100644
--- a/cmd/serf/command/keys_test.go
+++ b/cmd/serf/command/keys_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package command
diff --git a/cmd/serf/command/leave.go b/cmd/serf/command/leave.go
index c39d78eaf..82144408d 100644
--- a/cmd/serf/command/leave.go
+++ b/cmd/serf/command/leave.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package command
diff --git a/cmd/serf/command/leave_test.go b/cmd/serf/command/leave_test.go
index d2f6ffd1c..1df44758f 100644
--- a/cmd/serf/command/leave_test.go
+++ b/cmd/serf/command/leave_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package command
diff --git a/cmd/serf/command/members.go b/cmd/serf/command/members.go
index 5f0d27f28..ce43ad066 100644
--- a/cmd/serf/command/members.go
+++ b/cmd/serf/command/members.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package command
diff --git a/cmd/serf/command/members_test.go b/cmd/serf/command/members_test.go
index b8afb423f..fc0866159 100644
--- a/cmd/serf/command/members_test.go
+++ b/cmd/serf/command/members_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package command
diff --git a/cmd/serf/command/monitor.go b/cmd/serf/command/monitor.go
index a7861139d..d7c4b6c4d 100644
--- a/cmd/serf/command/monitor.go
+++ b/cmd/serf/command/monitor.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package command
diff --git a/cmd/serf/command/output.go b/cmd/serf/command/output.go
index 46ade3247..22a91a876 100644
--- a/cmd/serf/command/output.go
+++ b/cmd/serf/command/output.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package command
diff --git a/cmd/serf/command/output_test.go b/cmd/serf/command/output_test.go
index 11edcd0ce..6719a5846 100644
--- a/cmd/serf/command/output_test.go
+++ b/cmd/serf/command/output_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package command
diff --git a/cmd/serf/command/query.go b/cmd/serf/command/query.go
index 1a621791a..c7cf665e8 100644
--- a/cmd/serf/command/query.go
+++ b/cmd/serf/command/query.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package command
diff --git a/cmd/serf/command/query_test.go b/cmd/serf/command/query_test.go
index 619c57d40..06b91e602 100644
--- a/cmd/serf/command/query_test.go
+++ b/cmd/serf/command/query_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package command
diff --git a/cmd/serf/command/reachability.go b/cmd/serf/command/reachability.go
index bfd62abb5..c025facbc 100644
--- a/cmd/serf/command/reachability.go
+++ b/cmd/serf/command/reachability.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package command
diff --git a/cmd/serf/command/reachability_test.go b/cmd/serf/command/reachability_test.go
index 780614675..f0dfb2493 100644
--- a/cmd/serf/command/reachability_test.go
+++ b/cmd/serf/command/reachability_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package command
diff --git a/cmd/serf/command/rpc.go b/cmd/serf/command/rpc.go
index c4f082467..d6cb48e25 100644
--- a/cmd/serf/command/rpc.go
+++ b/cmd/serf/command/rpc.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package command
diff --git a/cmd/serf/command/rtt.go b/cmd/serf/command/rtt.go
index f8aed8ae4..dfd34c94a 100644
--- a/cmd/serf/command/rtt.go
+++ b/cmd/serf/command/rtt.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package command
diff --git a/cmd/serf/command/rtt_test.go b/cmd/serf/command/rtt_test.go
index eed0c25cc..9173b5297 100644
--- a/cmd/serf/command/rtt_test.go
+++ b/cmd/serf/command/rtt_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package command
diff --git a/cmd/serf/command/tags.go b/cmd/serf/command/tags.go
index 9abfe4418..8402a02bc 100644
--- a/cmd/serf/command/tags.go
+++ b/cmd/serf/command/tags.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package command
diff --git a/cmd/serf/command/tags_test.go b/cmd/serf/command/tags_test.go
index cfbca9da1..20a367e06 100644
--- a/cmd/serf/command/tags_test.go
+++ b/cmd/serf/command/tags_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package command
diff --git a/cmd/serf/command/util_test.go b/cmd/serf/command/util_test.go
index 4502fe1bf..3b977d345 100644
--- a/cmd/serf/command/util_test.go
+++ b/cmd/serf/command/util_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package command
diff --git a/cmd/serf/command/version.go b/cmd/serf/command/version.go
index e3c095a7d..903eee627 100644
--- a/cmd/serf/command/version.go
+++ b/cmd/serf/command/version.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package command
diff --git a/cmd/serf/commands.go b/cmd/serf/commands.go
index 552b8f8cc..31877c06b 100644
--- a/cmd/serf/commands.go
+++ b/cmd/serf/commands.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package main
diff --git a/cmd/serf/main.go b/cmd/serf/main.go
index 69cafd5ec..804067086 100644
--- a/cmd/serf/main.go
+++ b/cmd/serf/main.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package main
diff --git a/coordinate/client.go b/coordinate/client.go
index 6ba96bbdc..a51735070 100644
--- a/coordinate/client.go
+++ b/coordinate/client.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package coordinate
diff --git a/coordinate/client_test.go b/coordinate/client_test.go
index 7d3a13a82..af03f05e6 100644
--- a/coordinate/client_test.go
+++ b/coordinate/client_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package coordinate
diff --git a/coordinate/config.go b/coordinate/config.go
index f520f24fb..0e8cafa22 100644
--- a/coordinate/config.go
+++ b/coordinate/config.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package coordinate
diff --git a/coordinate/coordinate.go b/coordinate/coordinate.go
index 4ae103e74..8da09d0fc 100644
--- a/coordinate/coordinate.go
+++ b/coordinate/coordinate.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package coordinate
diff --git a/coordinate/coordinate_test.go b/coordinate/coordinate_test.go
index ee08be6e9..cedb9cec3 100644
--- a/coordinate/coordinate_test.go
+++ b/coordinate/coordinate_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package coordinate
diff --git a/coordinate/performance_test.go b/coordinate/performance_test.go
index 44201b2a7..cfdf0cce5 100644
--- a/coordinate/performance_test.go
+++ b/coordinate/performance_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package coordinate
diff --git a/coordinate/phantom.go b/coordinate/phantom.go
index 589896a2b..54a6aeea2 100644
--- a/coordinate/phantom.go
+++ b/coordinate/phantom.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package coordinate
diff --git a/coordinate/util_test.go b/coordinate/util_test.go
index 377fce710..618229cb4 100644
--- a/coordinate/util_test.go
+++ b/coordinate/util_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package coordinate
diff --git a/demo/web-load-balancer/setup_load_balancer.sh b/demo/web-load-balancer/setup_load_balancer.sh
index d7ca01765..6a2c311b4 100755
--- a/demo/web-load-balancer/setup_load_balancer.sh
+++ b/demo/web-load-balancer/setup_load_balancer.sh
@@ -1,5 +1,5 @@
 #!/bin/sh
-# Copyright (c) HashiCorp, Inc.
+# Copyright IBM Corp. 2013, 2025
 # SPDX-License-Identifier: MPL-2.0
 
 #
diff --git a/demo/web-load-balancer/setup_serf.sh b/demo/web-load-balancer/setup_serf.sh
index d8eceb3a5..2619c8859 100755
--- a/demo/web-load-balancer/setup_serf.sh
+++ b/demo/web-load-balancer/setup_serf.sh
@@ -1,5 +1,5 @@
 #!/bin/sh
-# Copyright (c) HashiCorp, Inc.
+# Copyright IBM Corp. 2013, 2025
 # SPDX-License-Identifier: MPL-2.0
 
 #
diff --git a/demo/web-load-balancer/setup_web_server.sh b/demo/web-load-balancer/setup_web_server.sh
index b36ac2ee8..b80a1c436 100755
--- a/demo/web-load-balancer/setup_web_server.sh
+++ b/demo/web-load-balancer/setup_web_server.sh
@@ -1,5 +1,5 @@
 #!/bin/sh
-# Copyright (c) HashiCorp, Inc.
+# Copyright IBM Corp. 2013, 2025
 # SPDX-License-Identifier: MPL-2.0
 
 #
diff --git a/demo/web-load-balancer/user_data/dump_user_data.py b/demo/web-load-balancer/user_data/dump_user_data.py
index a535e07e8..de69c3f70 100755
--- a/demo/web-load-balancer/user_data/dump_user_data.py
+++ b/demo/web-load-balancer/user_data/dump_user_data.py
@@ -1,5 +1,5 @@
 #!/usr/bin/env python
-# Copyright (c) HashiCorp, Inc.
+# Copyright IBM Corp. 2013, 2025
 # SPDX-License-Identifier: MPL-2.0
 
 import base64
diff --git a/demo/web-load-balancer/user_data/load_balancer_user_data.sh b/demo/web-load-balancer/user_data/load_balancer_user_data.sh
index 43f385c77..1aaaac309 100755
--- a/demo/web-load-balancer/user_data/load_balancer_user_data.sh
+++ b/demo/web-load-balancer/user_data/load_balancer_user_data.sh
@@ -1,5 +1,5 @@
 #!/bin/bash
-# Copyright (c) HashiCorp, Inc.
+# Copyright IBM Corp. 2013, 2025
 # SPDX-License-Identifier: MPL-2.0
 
 NODE_SETUP_URL="https://raw.github.com/hashicorp/serf/master/demo/web-load-balancer/setup_load_balancer.sh"
diff --git a/demo/web-load-balancer/user_data/web_user_data.sh b/demo/web-load-balancer/user_data/web_user_data.sh
index 676755a50..b474a76d6 100755
--- a/demo/web-load-balancer/user_data/web_user_data.sh
+++ b/demo/web-load-balancer/user_data/web_user_data.sh
@@ -1,5 +1,5 @@
 #!/bin/bash
-# Copyright (c) HashiCorp, Inc.
+# Copyright IBM Corp. 2013, 2025
 # SPDX-License-Identifier: MPL-2.0
 
 NODE_SETUP_URL="https://raw.github.com/hashicorp/serf/master/demo/web-load-balancer/setup_web_server.sh"
diff --git a/scripts/build.sh b/scripts/build.sh
index dfc56f8a0..0350160d5 100755
--- a/scripts/build.sh
+++ b/scripts/build.sh
@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
-# Copyright (c) HashiCorp, Inc.
+# Copyright IBM Corp. 2013, 2025
 # SPDX-License-Identifier: MPL-2.0
 
 #
diff --git a/scripts/dist.sh b/scripts/dist.sh
index f281013b3..bd4047f82 100755
--- a/scripts/dist.sh
+++ b/scripts/dist.sh
@@ -1,5 +1,5 @@
 #!/bin/bash
-# Copyright (c) HashiCorp, Inc.
+# Copyright IBM Corp. 2013, 2025
 # SPDX-License-Identifier: MPL-2.0
 
 set -e
diff --git a/scripts/dist_build.sh b/scripts/dist_build.sh
index 38c18ec25..dfacfecd7 100755
--- a/scripts/dist_build.sh
+++ b/scripts/dist_build.sh
@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
-# Copyright (c) HashiCorp, Inc.
+# Copyright IBM Corp. 2013, 2025
 # SPDX-License-Identifier: MPL-2.0
 
 set -e
diff --git a/scripts/serf-builder/Dockerfile b/scripts/serf-builder/Dockerfile
index 5ec83e366..492dd5bcd 100644
--- a/scripts/serf-builder/Dockerfile
+++ b/scripts/serf-builder/Dockerfile
@@ -1,4 +1,4 @@
-# Copyright (c) HashiCorp, Inc.
+# Copyright IBM Corp. 2013, 2025
 # SPDX-License-Identifier: MPL-2.0
 
 FROM docker.mirror.hashicorp.services/debian:stable
diff --git a/scripts/setup_test_subnet.sh b/scripts/setup_test_subnet.sh
index c1f48d714..a50128158 100755
--- a/scripts/setup_test_subnet.sh
+++ b/scripts/setup_test_subnet.sh
@@ -1,5 +1,5 @@
 #!/bin/bash
-# Copyright (c) HashiCorp, Inc.
+# Copyright IBM Corp. 2013, 2025
 # SPDX-License-Identifier: MPL-2.0
 
 #
diff --git a/scripts/start_cluster.sh b/scripts/start_cluster.sh
index 4cce9555a..8b2175952 100755
--- a/scripts/start_cluster.sh
+++ b/scripts/start_cluster.sh
@@ -1,5 +1,5 @@
 #!/bin/bash
-# Copyright (c) HashiCorp, Inc.
+# Copyright IBM Corp. 2013, 2025
 # SPDX-License-Identifier: MPL-2.0
 
 SERF="./bin/serf"
diff --git a/serf/broadcast.go b/serf/broadcast.go
index e70e2205d..c7d625afc 100644
--- a/serf/broadcast.go
+++ b/serf/broadcast.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package serf
diff --git a/serf/broadcast_test.go b/serf/broadcast_test.go
index 747828f24..f0258deae 100644
--- a/serf/broadcast_test.go
+++ b/serf/broadcast_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package serf
diff --git a/serf/coalesce.go b/serf/coalesce.go
index 9310e53e6..d581c67c0 100644
--- a/serf/coalesce.go
+++ b/serf/coalesce.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package serf
diff --git a/serf/coalesce_member.go b/serf/coalesce_member.go
index b966393be..7e6ed20e3 100644
--- a/serf/coalesce_member.go
+++ b/serf/coalesce_member.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package serf
diff --git a/serf/coalesce_member_test.go b/serf/coalesce_member_test.go
index 83fdbcf61..eedfca3b5 100644
--- a/serf/coalesce_member_test.go
+++ b/serf/coalesce_member_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package serf
diff --git a/serf/coalesce_test.go b/serf/coalesce_test.go
index 62ae7dc6f..9d9cda463 100644
--- a/serf/coalesce_test.go
+++ b/serf/coalesce_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package serf
diff --git a/serf/coalesce_user.go b/serf/coalesce_user.go
index 69499c805..55e88e746 100644
--- a/serf/coalesce_user.go
+++ b/serf/coalesce_user.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package serf
diff --git a/serf/coalesce_user_test.go b/serf/coalesce_user_test.go
index a250c76f1..8d161d6cd 100644
--- a/serf/coalesce_user_test.go
+++ b/serf/coalesce_user_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package serf
diff --git a/serf/config.go b/serf/config.go
index 4ac132abe..6211cfee8 100644
--- a/serf/config.go
+++ b/serf/config.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package serf
diff --git a/serf/config_test.go b/serf/config_test.go
index 669cf9ddb..a5b2c5842 100644
--- a/serf/config_test.go
+++ b/serf/config_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package serf
diff --git a/serf/conflict_delegate.go b/serf/conflict_delegate.go
index 8d30872ab..0275faecb 100644
--- a/serf/conflict_delegate.go
+++ b/serf/conflict_delegate.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package serf
diff --git a/serf/delegate.go b/serf/delegate.go
index 37c86acb0..11eb7cdf7 100644
--- a/serf/delegate.go
+++ b/serf/delegate.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package serf
diff --git a/serf/delegate_test.go b/serf/delegate_test.go
index a45677a52..6ab936ce4 100644
--- a/serf/delegate_test.go
+++ b/serf/delegate_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package serf
diff --git a/serf/event.go b/serf/event.go
index 45cd378cb..4d3989d3c 100644
--- a/serf/event.go
+++ b/serf/event.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package serf
diff --git a/serf/event_delegate.go b/serf/event_delegate.go
index 8ad3d0dd6..53b00efe4 100644
--- a/serf/event_delegate.go
+++ b/serf/event_delegate.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package serf
diff --git a/serf/event_test.go b/serf/event_test.go
index e3bd5a31f..d60e47bcc 100644
--- a/serf/event_test.go
+++ b/serf/event_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package serf
diff --git a/serf/internal/race/race_disabled.go b/serf/internal/race/race_disabled.go
index c54ff3975..ebe643467 100644
--- a/serf/internal/race/race_disabled.go
+++ b/serf/internal/race/race_disabled.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 //go:build !race
diff --git a/serf/internal/race/race_enabled.go b/serf/internal/race/race_enabled.go
index 1e3907936..e7480dca1 100644
--- a/serf/internal/race/race_enabled.go
+++ b/serf/internal/race/race_enabled.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 //go:build race
diff --git a/serf/internal_query.go b/serf/internal_query.go
index 23988c335..347071fb8 100644
--- a/serf/internal_query.go
+++ b/serf/internal_query.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package serf
diff --git a/serf/internal_query_test.go b/serf/internal_query_test.go
index e4a7552ae..60d619314 100644
--- a/serf/internal_query_test.go
+++ b/serf/internal_query_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package serf
diff --git a/serf/keymanager.go b/serf/keymanager.go
index 5ea5e8798..79728c24d 100644
--- a/serf/keymanager.go
+++ b/serf/keymanager.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package serf
diff --git a/serf/keymanager_test.go b/serf/keymanager_test.go
index b16fb76ab..cae596236 100644
--- a/serf/keymanager_test.go
+++ b/serf/keymanager_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package serf
diff --git a/serf/lamport.go b/serf/lamport.go
index 0ba8ed05b..c06779d68 100644
--- a/serf/lamport.go
+++ b/serf/lamport.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package serf
diff --git a/serf/lamport_test.go b/serf/lamport_test.go
index 268e90709..128c66c29 100644
--- a/serf/lamport_test.go
+++ b/serf/lamport_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package serf
diff --git a/serf/merge_delegate.go b/serf/merge_delegate.go
index 2c8e07c0b..34e7f71f3 100644
--- a/serf/merge_delegate.go
+++ b/serf/merge_delegate.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package serf
diff --git a/serf/merge_delegate_test.go b/serf/merge_delegate_test.go
index 96d509bab..8c695ffba 100644
--- a/serf/merge_delegate_test.go
+++ b/serf/merge_delegate_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package serf
diff --git a/serf/messages.go b/serf/messages.go
index f7d2cd8a0..9312b1c12 100644
--- a/serf/messages.go
+++ b/serf/messages.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package serf
diff --git a/serf/messages_test.go b/serf/messages_test.go
index 44dff0804..152b7e23e 100644
--- a/serf/messages_test.go
+++ b/serf/messages_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package serf
diff --git a/serf/ping_delegate.go b/serf/ping_delegate.go
index 704d25c3a..c088aa765 100644
--- a/serf/ping_delegate.go
+++ b/serf/ping_delegate.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package serf
diff --git a/serf/query.go b/serf/query.go
index 2c04a9078..073af5226 100644
--- a/serf/query.go
+++ b/serf/query.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package serf
diff --git a/serf/query_test.go b/serf/query_test.go
index 5735be53a..a4710677e 100644
--- a/serf/query_test.go
+++ b/serf/query_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package serf
diff --git a/serf/serf.go b/serf/serf.go
index 92a0515c7..6b3c7dcd5 100644
--- a/serf/serf.go
+++ b/serf/serf.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package serf
diff --git a/serf/serf_internals_test.go b/serf/serf_internals_test.go
index 9470500af..e6b3b9d8c 100644
--- a/serf/serf_internals_test.go
+++ b/serf/serf_internals_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package serf
diff --git a/serf/serf_test.go b/serf/serf_test.go
index 8bc66262f..414dc4b96 100644
--- a/serf/serf_test.go
+++ b/serf/serf_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package serf
diff --git a/serf/snapshot.go b/serf/snapshot.go
index 5bc02bc19..635bc492d 100644
--- a/serf/snapshot.go
+++ b/serf/snapshot.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package serf
diff --git a/serf/snapshot_test.go b/serf/snapshot_test.go
index bab5bc76e..5e0d78e63 100644
--- a/serf/snapshot_test.go
+++ b/serf/snapshot_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package serf
diff --git a/testutil/addr.go b/testutil/addr.go
index e6c7da6cf..fb1178959 100644
--- a/testutil/addr.go
+++ b/testutil/addr.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package testutil
diff --git a/testutil/retry/retry.go b/testutil/retry/retry.go
index 2914b6ade..ba27f7e8e 100644
--- a/testutil/retry/retry.go
+++ b/testutil/retry/retry.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 // Package retry provides support for repeating operations in tests.
diff --git a/testutil/retry/retry_test.go b/testutil/retry/retry_test.go
index 19e93e353..1ef63fce5 100644
--- a/testutil/retry/retry_test.go
+++ b/testutil/retry/retry_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package retry
diff --git a/testutil/testlog.go b/testutil/testlog.go
index f0e8f10ec..d477631f9 100644
--- a/testutil/testlog.go
+++ b/testutil/testlog.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package testutil
diff --git a/testutil/testutil_test.go b/testutil/testutil_test.go
index 8736fdd2f..10b9440ac 100644
--- a/testutil/testutil_test.go
+++ b/testutil/testutil_test.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package testutil
diff --git a/testutil/yield.go b/testutil/yield.go
index ba523f2d6..e8aeee67b 100644
--- a/testutil/yield.go
+++ b/testutil/yield.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package testutil
diff --git a/version/version.go b/version/version.go
index fa2b9a87f..101854f41 100644
--- a/version/version.go
+++ b/version/version.go
@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2013, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package version