diff --git a/dev-ml/angstrom/Manifest b/dev-ml/angstrom/Manifest
new file mode 100644
index 0000000000000..13125c259fb98
--- /dev/null
+++ b/dev-ml/angstrom/Manifest
@@ -0,0 +1 @@
+DIST angstrom-0.16.1.tar.gz 117544 BLAKE2B e09bea0e44d391aa9aa2dc0592bf0c40a62f5d0e9b9fd3b9247ca558c59ab1bd30c820c07a29543b87bbea9636a847135abe1a4fd196baa62ee7679484ce77cc SHA512 754089f10e4836fc6379a508662853885ceec985367a9b4bc2915ce5f45e5878aba31523149710b5040e4e373a0a27a6315231dfbc690ff4718c4c3d7df33732
diff --git a/dev-ml/angstrom/angstrom-0.16.1.ebuild b/dev-ml/angstrom/angstrom-0.16.1.ebuild
new file mode 100644
index 0000000000000..c72a2733752be
--- /dev/null
+++ b/dev-ml/angstrom/angstrom-0.16.1.ebuild
@@ -0,0 +1,24 @@
+# Copyright 2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+inherit dune
+
+DESCRIPTION="Parser combinators built for speed and memory-efficiency"
+HOMEPAGE="https://github.com/inhabitedtype/angstrom"
+SRC_URI="https://github.com/inhabitedtype/${PN}/archive/${PV}.tar.gz
+	-> ${P}.tar.gz"
+
+LICENSE="BSD"
+SLOT="0"
+KEYWORDS="~amd64"
+IUSE="+ocamlopt test"
+RESTRICT="!test? ( test )"
+
+RDEPEND="
+	dev-ml/async:=[ocamlopt?]
+	dev-ml/bigstringaf:=[ocamlopt?]
+	dev-ml/lwt:=[ocamlopt?]
+"
+DEPEND="${RDEPEND}"
+BDEPEND="test? ( dev-ml/alcotest )"
diff --git a/dev-ml/angstrom/metadata.xml b/dev-ml/angstrom/metadata.xml
new file mode 100644
index 0000000000000..839cf055a5fc8
--- /dev/null
+++ b/dev-ml/angstrom/metadata.xml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+	<maintainer type="project">
+		<email>ml@gentoo.org</email>
+		<name>ML</name>
+	</maintainer>
+	<upstream>
+		<remote-id type="github">inhabitedtype/angstrom</remote-id>
+	</upstream>
+</pkgmetadata>