diff --git a/defaults/clade_display_names.yml b/defaults/clade_display_names.yml
index 8806974a7..26c79ec7d 100644
--- a/defaults/clade_display_names.yml
+++ b/defaults/clade_display_names.yml
@@ -43,3 +43,4 @@
 24C: 24C (KP.3)
 24D: 24D (XDV.1)
 24E: 24E (KP.3.1.1)
+24F: 24F (XEC)
diff --git a/defaults/clade_emergence_dates.tsv b/defaults/clade_emergence_dates.tsv
index d55128dcf..efb1a44ee 100644
--- a/defaults/clade_emergence_dates.tsv
+++ b/defaults/clade_emergence_dates.tsv
@@ -44,4 +44,5 @@ Nextstrain_clade	first_sequence
 24B	2023-11-01
 24C	2023-12-01
 24D	2024-01-01
-24E	2023-12-01
\ No newline at end of file
+24E	2023-12-01
+24F	2024-06-01
diff --git a/defaults/clade_hierarchy.tsv b/defaults/clade_hierarchy.tsv
index 3b36a11f4..a52af6ad5 100644
--- a/defaults/clade_hierarchy.tsv
+++ b/defaults/clade_hierarchy.tsv
@@ -43,3 +43,4 @@ clade	parent	WHO
 24C	24B	Omicron
 24D	21L	Omicron
 24E	24C	Omicron
+24F	24C	Omicron
diff --git a/defaults/clades.tsv b/defaults/clades.tsv
index 31a32b40f..68b54b367 100644
--- a/defaults/clades.tsv
+++ b/defaults/clades.tsv
@@ -244,3 +244,7 @@ clade	gene	site	alt
 24E	nuc	13121	T
 24E	nuc	15372	T
 24E	nuc	19722	G
+
+24F	clade	24C
+24F	nuc	2060	A
+
diff --git a/defaults/color_ordering.tsv b/defaults/color_ordering.tsv
index 5c11dd2bf..897b2bbe4 100644
--- a/defaults/color_ordering.tsv
+++ b/defaults/color_ordering.tsv
@@ -34043,6 +34043,7 @@ clade_membership	24B (JN.1.11.1)
 clade_membership	24C (KP.3)
 clade_membership	24D (XDV.1)
 clade_membership	24E (KP.3.1.1)
+clade_membership	24F (XEC)
 
 ################