diff --git a/sec-keys/openpgp-keys-mathieudesnoyers/Manifest b/sec-keys/openpgp-keys-mathieudesnoyers/Manifest
new file mode 100644
index 000000000000..1e74e6cdfc1a
--- /dev/null
+++ b/sec-keys/openpgp-keys-mathieudesnoyers/Manifest
@@ -0,0 +1,2 @@
+DIST openpgp-keys-mathieudesnoyers-openpgp-20250909.asc 4583 BLAKE2B 66d58d88bc76b636129dbf48f04c32a924389b71f10a49a6b190d4fd6350c542b1fd65e6c1d09a2df64377791d44dad595ac10c9c8f29799334d5beb8c167f87 SHA512 b4041feb4d272e078dc703fc71dcc901b1a8cdc7a3eba474741a508b2e36f483a5605d8d9e7fabd9ac615f883b41dacf13e070c1f0f8340e192c8dec8af78870
+DIST openpgp-keys-mathieudesnoyers-ubuntu-20250909.asc 14793 BLAKE2B 6dc21350f0b56db0e1104454c9fb2d087b67fea159e194b137b4479e6ec11fa3f3c36d947c2c909fa558af213b098db89e257c4744f2f4299db66b35f79147c2 SHA512 4797575e551e33f9b6bbe0be69373a039818b8bbda81ff8d72acb8b927f488f2599e2b2f43485ba27cbc3fb0eadd5c1cd4c68c949462d5094bf4a605ce54f514
diff --git a/sec-keys/openpgp-keys-mathieudesnoyers/metadata.xml b/sec-keys/openpgp-keys-mathieudesnoyers/metadata.xml
new file mode 100644
index 000000000000..115e9d64a669
--- /dev/null
+++ b/sec-keys/openpgp-keys-mathieudesnoyers/metadata.xml
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+	<!-- maintainer-needed -->
+</pkgmetadata>
diff --git a/sec-keys/openpgp-keys-mathieudesnoyers/openpgp-keys-mathieudesnoyers-20250909.ebuild b/sec-keys/openpgp-keys-mathieudesnoyers/openpgp-keys-mathieudesnoyers-20250909.ebuild
new file mode 100644
index 000000000000..332964855cc4
--- /dev/null
+++ b/sec-keys/openpgp-keys-mathieudesnoyers/openpgp-keys-mathieudesnoyers-20250909.ebuild
@@ -0,0 +1,15 @@
+# Copyright 2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+SEC_KEYS_VALIDPGPKEYS=(
+	"2A0B4ED915F2D3FA45F5B16217280A9781186ACF:mathieudesnoyers:openpgp,ubuntu"
+)
+
+inherit sec-keys
+
+DESCRIPTION="OpenPGP keys used by Mathieu Desnoyers"
+HOMEPAGE="https://github.com/compudj"
+
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~loong ~mips ~ppc ~ppc64 ~riscv ~sparc ~x86"