diff --git a/src/grammar/functions.ts b/src/grammar/functions.ts
index 77da0f4..f40aa61 100644
--- a/src/grammar/functions.ts
+++ b/src/grammar/functions.ts
@@ -261,6 +261,10 @@ export const aggregateFunctions: string[] = [
   "min",
   "mode",
   "nsum",
+  "percentile_cont",
+  "percentile_disc",
+  "quantile_cont",
+  "quantile_disc",
   "regr_intercept",
   "regr_r2",
   "regr_slope",
diff --git a/tests/autocomplete.test.ts b/tests/autocomplete.test.ts
index 86d4117..cbf9439 100644
--- a/tests/autocomplete.test.ts
+++ b/tests/autocomplete.test.ts
@@ -4404,6 +4404,24 @@ describe("Position-typed suggestions — by statement type", () => {
       assertAtPosition("SELECT s", { hasFunction: ["sparkline"] })
     })
 
+    it("SELECT p| — percentile_cont/percentile_disc (aggregate) suggested in expression context", () => {
+      assertAtPosition("SELECT p", {
+        hasFunction: ["percentile_cont", "percentile_disc"],
+      })
+    })
+
+    it("SELECT q| — quantile_cont/quantile_disc (aggregate) suggested in expression context", () => {
+      assertAtPosition("SELECT q", {
+        hasFunction: ["quantile_cont", "quantile_disc"],
+      })
+    })
+
+    it("SELECT * FROM trades WHERE col = p| — percentile_* NOT suggested (aggregate)", () => {
+      assertAtPosition("SELECT * FROM trades WHERE price = p", {
+        noFunction: ["percentile_cont", "percentile_disc"],
+      })
+    })
+
     it("SELECT * FROM trades WHERE col = s| — sparkline NOT suggested (aggregate)", () => {
       assertAtPosition("SELECT * FROM trades WHERE price = s", {
         noFunction: ["sparkline"],