diff --git a/src/server.ts b/src/server.ts
index 76917b2..adc708f 100644
--- a/src/server.ts
+++ b/src/server.ts
@@ -150,6 +150,7 @@ function parseResultFilters(
   const sellabilityStatus = filters.get("sellabilityStatus")?.trim();
   const minConfidence = filters.get("minConfidence")?.trim();
   const maxConfidence = filters.get("maxConfidence")?.trim();
+  const amazonIsSeller = filters.get("amazonIsSeller")?.trim();
 
   const conditions: string[] = ["run_id = ?"];
   const params: Array<string | number> = [runId];
@@ -174,6 +175,12 @@ function parseResultFilters(
     params.push(Number(maxConfidence));
   }
 
+  if (amazonIsSeller === "yes") {
+    conditions.push("amazon_is_seller = 1");
+  } else if (amazonIsSeller === "no") {
+    conditions.push("amazon_is_seller = 0");
+  }
+
   if (q) {
     const wildcard = `%${q}%`;
     if (processType === "lead_analysis") {
@@ -310,6 +317,7 @@ function getRuns(filters: URLSearchParams) {
 function getProductList(filters: URLSearchParams) {
   const q = filters.get("q")?.trim() || "";
   const verdict = filters.get("verdict")?.trim();
+  const amazonIsSeller = filters.get("amazonIsSeller")?.trim();
   const page = parseIntParam(filters.get("page"), 1);
   const pageSize = Math.min(
     parseIntParam(filters.get("pageSize"), DEFAULT_PAGE_SIZE),
@@ -325,6 +333,12 @@ function getProductList(filters: URLSearchParams) {
     params.push(verdict);
   }
 
+  if (amazonIsSeller === "yes") {
+    conditions.push("amazon_is_seller = 1");
+  } else if (amazonIsSeller === "no") {
+    conditions.push("amazon_is_seller = 0");
+  }
+
   if (q) {
     const wildcard = `%${q}%`;
     conditions.push(
diff --git a/src/web/frontend.tsx b/src/web/frontend.tsx
index e54d2e8..17a6df7 100644
--- a/src/web/frontend.tsx
+++ b/src/web/frontend.tsx
@@ -78,6 +78,7 @@ type ResultsResponse = {
 };
 
 type VerdictFilter = "" | "FBA" | "FBM" | "SKIP";
+type AmazonSellerFilter = "" | "yes" | "no";
 
 type ProductListItem = {
   processType: ProcessType;
@@ -429,6 +430,8 @@ function RunDetails({
   const [search, setSearch] = useState("");
   const [verdict, setVerdict] = useState("");
   const [sellabilityStatus, setSellabilityStatus] = useState("");
+  const [amazonSellerFilter, setAmazonSellerFilter] =
+    useState<AmazonSellerFilter>("");
   const [minConfidence, setMinConfidence] = useState("");
   const [maxConfidence, setMaxConfidence] = useState("");
   const [page, setPage] = useState(1);
@@ -469,6 +472,7 @@ function RunDetails({
       if (search) params.set("q", search);
       if (verdict) params.set("verdict", verdict);
       if (sellabilityStatus) params.set("sellabilityStatus", sellabilityStatus);
+      if (amazonSellerFilter) params.set("amazonIsSeller", amazonSellerFilter);
       if (minConfidence) params.set("minConfidence", minConfidence);
       if (maxConfidence) params.set("maxConfidence", maxConfidence);
 
@@ -484,7 +488,7 @@ function RunDetails({
     return () => {
       cancelled = true;
     };
-  }, [processType, runId, search, verdict, sellabilityStatus, minConfidence, maxConfidence, page, pageSize, sort, refreshTick]);
+  }, [processType, runId, search, verdict, sellabilityStatus, amazonSellerFilter, minConfidence, maxConfidence, page, pageSize, sort, refreshTick]);
 
   useEffect(() => {
     const interval = window.setInterval(() => {
@@ -555,6 +559,17 @@ function RunDetails({
             <option value="not_available">not_available</option>
             <option value="unknown">unknown</option>
           </select>
+          <select
+            value={amazonSellerFilter}
+            onChange={(e) => {
+              setPage(1);
+              setAmazonSellerFilter(e.target.value as AmazonSellerFilter);
+            }}
+          >
+            <option value="">Amazon seller: all</option>
+            <option value="yes">Amazon seller: yes</option>
+            <option value="no">Amazon seller: no</option>
+          </select>
           <input value={minConfidence} onChange={(e) => { setPage(1); setMinConfidence(e.target.value); }} placeholder="Min confidence" />
           <input value={maxConfidence} onChange={(e) => { setPage(1); setMaxConfidence(e.target.value); }} placeholder="Max confidence" />
           <select value={String(pageSize)} onChange={(e) => { setPage(1); setPageSize(Number(e.target.value)); }}>
@@ -565,7 +580,7 @@ function RunDetails({
         </div>
         <div style={{ marginTop: 10 }}>
           <a
-            href={`/api/runs/${processType}/${runId}/export.csv?q=${encodeURIComponent(search)}&verdict=${encodeURIComponent(verdict)}&sellabilityStatus=${encodeURIComponent(sellabilityStatus)}&minConfidence=${encodeURIComponent(minConfidence)}&maxConfidence=${encodeURIComponent(maxConfidence)}&sort=${encodeURIComponent(buildSortValue(sort))}`}
+            href={`/api/runs/${processType}/${runId}/export.csv?q=${encodeURIComponent(search)}&verdict=${encodeURIComponent(verdict)}&sellabilityStatus=${encodeURIComponent(sellabilityStatus)}&amazonIsSeller=${encodeURIComponent(amazonSellerFilter)}&minConfidence=${encodeURIComponent(minConfidence)}&maxConfidence=${encodeURIComponent(maxConfidence)}&sort=${encodeURIComponent(buildSortValue(sort))}`}
           >
             <button>Export filtered CSV</button>
           </a>
@@ -665,6 +680,8 @@ function ProductList({ verdict, onBack }: { verdict: VerdictFilter; onBack: () =
   const [loading, setLoading] = useState(false);
   const [search, setSearch] = useState("");
   const [activeVerdict, setActiveVerdict] = useState<VerdictFilter>(verdict);
+  const [amazonSellerFilter, setAmazonSellerFilter] =
+    useState<AmazonSellerFilter>("");
   const [page, setPage] = useState(1);
   const [pageSize, setPageSize] = useState(25);
   const [sort, setSort] = useState<SortState>({ field: "monthly_sold", direction: "DESC" });
@@ -683,6 +700,7 @@ function ProductList({ verdict, onBack }: { verdict: VerdictFilter; onBack: () =
       params.set("sort", buildSortValue(sort));
       if (search) params.set("q", search);
       if (activeVerdict) params.set("verdict", activeVerdict);
+      if (amazonSellerFilter) params.set("amazonIsSeller", amazonSellerFilter);
       const res = await fetch(`/api/products?${params.toString()}`);
       const payload = (await res.json()) as ProductListResponse;
       if (!cancelled) {
@@ -695,7 +713,7 @@ function ProductList({ verdict, onBack }: { verdict: VerdictFilter; onBack: () =
     return () => {
       cancelled = true;
     };
-  }, [search, activeVerdict, page, pageSize, sort]);
+  }, [search, activeVerdict, amazonSellerFilter, page, pageSize, sort]);
 
   async function reanalyzeAsin(item: ProductListItem) {
     const key = `${item.processType}:${item.runId}:${item.asin}`;
@@ -715,6 +733,7 @@ function ProductList({ verdict, onBack }: { verdict: VerdictFilter; onBack: () =
       params.set("sort", buildSortValue(sort));
       if (search) params.set("q", search);
       if (activeVerdict) params.set("verdict", activeVerdict);
+      if (amazonSellerFilter) params.set("amazonIsSeller", amazonSellerFilter);
       const res = await fetch(`/api/products?${params.toString()}`);
       const payload = (await res.json()) as ProductListResponse;
       setItems(payload);
@@ -740,6 +759,17 @@ function ProductList({ verdict, onBack }: { verdict: VerdictFilter; onBack: () =
             <option value="FBM">FBM</option>
             <option value="SKIP">SKIP</option>
           </select>
+          <select
+            value={amazonSellerFilter}
+            onChange={(e) => {
+              setPage(1);
+              setAmazonSellerFilter(e.target.value as AmazonSellerFilter);
+            }}
+          >
+            <option value="">Amazon seller: all</option>
+            <option value="yes">Amazon seller: yes</option>
+            <option value="no">Amazon seller: no</option>
+          </select>
           <select value={String(pageSize)} onChange={(e) => { setPage(1); setPageSize(Number(e.target.value)); }}>
             <option value="25">25 / page</option>
             <option value="50">50 / page</option>