diff --git a/internal/db/migrate.go b/internal/db/migrate.go
index f1fe5a0..913f243 100644
--- a/internal/db/migrate.go
+++ b/internal/db/migrate.go
@@ -247,6 +247,9 @@ var additiveMigrationStmts = []string{
 	// Section 9: buyer-specific requests
 	`ALTER TABLE diligence_requests ADD COLUMN is_buyer_specific INTEGER DEFAULT 0`,
 	`ALTER TABLE diligence_requests ADD COLUMN visible_to_buyer_group TEXT DEFAULT ''`,
+	// Section 13: analytics per-buyer
+	`ALTER TABLE deal_activity ADD COLUMN buyer_group TEXT DEFAULT ''`,
+	`ALTER TABLE deal_activity ADD COLUMN time_spent_seconds INTEGER DEFAULT 0`,
 }
 
 func seed(db *sql.DB) error {
diff --git a/internal/handler/analytics.go b/internal/handler/analytics.go
index fe285ce..ab319ea 100644
--- a/internal/handler/analytics.go
+++ b/internal/handler/analytics.go
@@ -1,6 +1,7 @@
 package handler
 
 import (
+	"fmt"
 	"net/http"
 
 	"dealroom/templates"
@@ -40,3 +41,60 @@ func (h *Handler) handleAnalytics(w http.ResponseWriter, r *http.Request) {
 
 	templates.AnalyticsPage(profile, stats, deals, dealID).Render(r.Context(), w)
 }
+
+func (h *Handler) handleAnalyticsBuyers(w http.ResponseWriter, r *http.Request) {
+	dealID := r.URL.Query().Get("deal_id")
+	if dealID == "" {
+		w.Write([]byte(`<p class="text-sm text-gray-500">Select a deal to see buyer activity.</p>`))
+		return
+	}
+
+	rows, err := h.db.Query(`
+		SELECT COALESCE(buyer_group, 'Unknown') as bg,
+			COUNT(CASE WHEN activity_type = 'download' THEN 1 END) as downloads,
+			MAX(created_at) as last_access,
+			SUM(COALESCE(time_spent_seconds, 0)) as total_time,
+			COUNT(CASE WHEN activity_type = 'view' THEN 1 END) as views
+		FROM deal_activity WHERE deal_id = ? AND COALESCE(buyer_group, '') != ''
+		GROUP BY COALESCE(buyer_group, 'Unknown')
+		ORDER BY last_access DESC`, dealID)
+	if err != nil {
+		http.Error(w, "Error", 500)
+		return
+	}
+	defer rows.Close()
+
+	w.Header().Set("Content-Type", "text/html")
+	html := `<table class="w-full"><thead><tr class="border-b border-gray-800">
+		<th class="text-left px-4 py-2 text-xs font-medium text-gray-500 uppercase">Buyer Group</th>
+		<th class="text-left px-4 py-2 text-xs font-medium text-gray-500 uppercase">Downloads</th>
+		<th class="text-left px-4 py-2 text-xs font-medium text-gray-500 uppercase">Last Accessed</th>
+		<th class="text-left px-4 py-2 text-xs font-medium text-gray-500 uppercase">Total Time</th>
+		<th class="text-left px-4 py-2 text-xs font-medium text-gray-500 uppercase">Files Viewed</th>
+	</tr></thead><tbody class="divide-y divide-gray-800/50">`
+
+	hasRows := false
+	for rows.Next() {
+		hasRows = true
+		var bg, lastAccess string
+		var downloads, totalTime, views int
+		rows.Scan(&bg, &downloads, &lastAccess, &totalTime, &views)
+		timeStr := fmt.Sprintf("%dm", totalTime/60)
+		if totalTime < 60 {
+			timeStr = fmt.Sprintf("%ds", totalTime)
+		}
+		html += fmt.Sprintf(`<tr class="hover:bg-gray-800/30">
+			<td class="px-4 py-2 text-sm font-medium text-teal-400">%s</td>
+			<td class="px-4 py-2 text-sm text-gray-400">%d</td>
+			<td class="px-4 py-2 text-xs text-gray-500">%s</td>
+			<td class="px-4 py-2 text-sm text-gray-400">%s</td>
+			<td class="px-4 py-2 text-sm text-gray-400">%d</td>
+		</tr>`, bg, downloads, lastAccess, timeStr, views)
+	}
+	if !hasRows {
+		html += `<tr><td colspan="5" class="px-4 py-4 text-center text-gray-600 text-sm">No buyer activity recorded yet.</td></tr>`
+	}
+
+	html += `</tbody></table>`
+	w.Write([]byte(html))
+}
diff --git a/internal/handler/handler.go b/internal/handler/handler.go
index 7515939..c05e433 100644
--- a/internal/handler/handler.go
+++ b/internal/handler/handler.go
@@ -88,6 +88,7 @@ mux.HandleFunc("/auth/logout", h.handleLogout)
 	mux.HandleFunc("/deals/files/download/", h.requireAuth(h.handleFileDownload))
 	mux.HandleFunc("/deals/files/comments/", h.requireAuth(h.handleFileComments))
 	mux.HandleFunc("/deals/search/", h.requireAuth(h.handleDealSearch))
+	mux.HandleFunc("/analytics/buyers", h.requireAuth(h.handleAnalyticsBuyers))
 
 	// HTMX partials
 	mux.HandleFunc("/htmx/request-comment", h.requireAuth(h.handleUpdateComment))
diff --git a/internal/model/models.go b/internal/model/models.go
index 179611e..a06db6c 100644
--- a/internal/model/models.go
+++ b/internal/model/models.go
@@ -130,8 +130,10 @@ type DealActivity struct {
 	ResourceType string
 	ResourceName string
 	ResourceID   string
-	Details      string
-	CreatedAt    time.Time
+	Details          string
+	BuyerGroup       string
+	TimeSpentSeconds int
+	CreatedAt        time.Time
 	// Computed
 	UserName string
 	DealName string
diff --git a/templates/analytics.templ b/templates/analytics.templ
index ef18d30..df9c36a 100644
--- a/templates/analytics.templ
+++ b/templates/analytics.templ
@@ -10,6 +10,10 @@ type AnalyticsStats struct {
 	CompletionPct int
 }
 
+func completionWidth(pct int) templ.Attributes {
+	return templ.Attributes{"style": fmt.Sprintf("width: %d%%", pct)}
+}
+
 templ AnalyticsPage(profile *model.Profile, stats *AnalyticsStats, deals []*model.Deal, selectedDealID string) {
 	@Layout(profile, "analytics") {
 		<div class="space-y-5">
@@ -45,11 +49,21 @@ templ AnalyticsPage(profile *model.Profile, stats *AnalyticsStats, deals []*mode
 					<div class="text-xs text-gray-500 uppercase tracking-wider mb-2">Request Completion</div>
 					<div class="text-3xl font-bold text-green-400">{ fmt.Sprintf("%d%%", stats.CompletionPct) }</div>
 					<div class="mt-3 w-full bg-gray-800 rounded-full h-2">
-						<div class="bg-green-500 h-2 rounded-full" style="width: 50%"> </div>
+						<div class="bg-green-500 h-2 rounded-full" { completionWidth(stats.CompletionPct)... }> </div>
 					</div>
 				</div>
 			</div>
 
+			<!-- Buyer Activity -->
+			if selectedDealID != "" {
+				<div class="bg-gray-900 rounded-lg border border-gray-800 p-6">
+					<h2 class="text-sm font-semibold mb-4">Buyer Activity</h2>
+					<div hx-get={ fmt.Sprintf("/analytics/buyers?deal_id=%s", selectedDealID) } hx-trigger="load" hx-swap="innerHTML">
+						<p class="text-sm text-gray-500">Loading buyer activity...</p>
+					</div>
+				</div>
+			}
+
 			<!-- Completion by Status -->
 			<div class="bg-gray-900 rounded-lg border border-gray-800 p-6">
 				<h2 class="text-sm font-semibold mb-4">Request Status Breakdown</h2>