diff --git a/src/components/Insights/common/insights/EndpointSlowdownSourceInsight/EndpointSlowdownSourceInsight.stories.tsx b/src/components/Insights/common/insights/EndpointSlowdownSourceInsight/EndpointSlowdownSourceInsight.stories.tsx
new file mode 100644
index 000000000..830a4fc7e
--- /dev/null
+++ b/src/components/Insights/common/insights/EndpointSlowdownSourceInsight/EndpointSlowdownSourceInsight.stories.tsx
@@ -0,0 +1,131 @@
+import { Meta, StoryObj } from "@storybook/react";
+import { EndpointSlowdownSourceInsight } from ".";
+import { InsightCategory, InsightScope, InsightType } from "../../../types";
+
+// More on how to set up stories at: https://storybook.js.org/docs/react/writing-stories/introduction
+const meta: Meta<typeof EndpointSlowdownSourceInsight> = {
+  title: "Insights/common/insights/EndpointSlowdownSourceInsight",
+  component: EndpointSlowdownSourceInsight,
+  parameters: {
+    // More on how to position stories at: https://storybook.js.org/docs/react/configure/story-layout
+    layout: "fullscreen"
+  }
+};
+
+export default meta;
+
+type Story = StoryObj<typeof meta>;
+
+export const WithEvaluatingChange: Story = {
+  args: {
+    insight: {
+      sourceSpanCodeObjectInsight: "sourceSpanCodeObjectInsightId",
+      id: "60b55792-8262-4c5d-9628-7cde7979ad6d",
+      firstDetected: "2023-12-05T17:25:47.010Z",
+      lastDetected: "2024-01-05T13:14:47.010Z",
+      criticality: 0,
+      firstCommitId: "b3f7b3f",
+      lastCommitId: "a1b2c3d",
+      deactivatedCommitId: null,
+      reopenCount: 0,
+      ticketLink: null,
+      impact: 0,
+      name: "Endpoint Slowdown Source",
+      type: InsightType.EndpointSlowdownSource,
+      category: InsightCategory.Performance,
+      specifity: 4,
+      importance: 2,
+      endpointSlowdownSources: [
+        {
+          percentile: "0.5",
+          spanInfo: {
+            name: "WaitForLock",
+            displayName: "WaitForLock",
+            instrumentationLibrary: "SampleInsightsController",
+            spanCodeObjectId: "span:SampleInsightsController$_$WaitForLock",
+            methodCodeObjectId: null,
+            kind: "Internal",
+            codeObjectId: null
+          },
+          level: 0,
+          previousDuration: {
+            value: 455.16,
+            unit: "ms",
+            raw: 455156000
+          },
+          currentDuration: {
+            value: 3.22,
+            unit: "sec",
+            raw: 3222871000
+          },
+          changeTime: "2023-06-30T11:09:55.000Z",
+          changeVerified: false
+        },
+        {
+          percentile: "0.95",
+          spanInfo: {
+            name: "WaitForLock",
+            displayName: "WaitForLock",
+            instrumentationLibrary: "SampleInsightsController",
+            spanCodeObjectId: "span:SampleInsightsController$_$WaitForLock",
+            methodCodeObjectId: null,
+            kind: "Internal",
+            codeObjectId: null
+          },
+          level: 0,
+          previousDuration: {
+            value: 1.6,
+            unit: "sec",
+            raw: 1604577000
+          },
+          currentDuration: {
+            value: 2.62,
+            unit: "sec",
+            raw: 2619854000
+          },
+          changeTime: "2023-06-30T11:09:54.000Z",
+          changeVerified: false
+        }
+      ],
+      decorators: [
+        {
+          title: "Endpoint Duration Slowdown Source",
+          description: "Some spans significantly slowdown this endpoint"
+        }
+      ],
+      scope: InsightScope.EntrySpan,
+      endpointSpan: "HTTP GET SampleInsights/lock/{milisec}",
+      spanCodeObjectId:
+        "span:OpenTelemetry.Instrumentation.AspNetCore$_$HTTP GET SampleInsights/lock/{milisec}",
+      route: "epHTTP:HTTP GET SampleInsights/lock/{milisec}",
+      serviceName: "Sample.MoneyTransfer.API",
+      spanInfo: {
+        name: "HTTP GET SampleInsights/lock/{milisec}",
+        displayName: "HTTP GET SampleInsights/lock/{milisec}",
+        instrumentationLibrary: "OpenTelemetry.Instrumentation.AspNetCore",
+        spanCodeObjectId:
+          "span:OpenTelemetry.Instrumentation.AspNetCore$_$HTTP GET SampleInsights/lock/{milisec}",
+        methodCodeObjectId:
+          "method:Sample.MoneyTransfer.API.Controllers.SampleInsightsController$_$Lock(Double)",
+        kind: "Server",
+        codeObjectId:
+          "Sample.MoneyTransfer.API.Controllers.SampleInsightsController$_$Lock(Double)"
+      },
+      shortDisplayInfo: {
+        title: "",
+        targetDisplayName: "",
+        subtitle: "",
+        description: ""
+      },
+      codeObjectId:
+        "Sample.MoneyTransfer.API.Controllers.SampleInsightsController$_$Lock(Double)",
+      environment: "BOB-LAPTOP[LOCAL]",
+      severity: 0,
+      isRecalculateEnabled: false,
+      prefixedCodeObjectId:
+        "method:Sample.MoneyTransfer.API.Controllers.SampleInsightsController$_$Lock(Double)",
+      customStartTime: null,
+      actualStartTime: "2023-06-16T11:10:21.334Z"
+    }
+  }
+};
diff --git a/src/components/Insights/common/insights/EndpointSlowdownSourceInsight/index.tsx b/src/components/Insights/common/insights/EndpointSlowdownSourceInsight/index.tsx
new file mode 100644
index 000000000..3794e3945
--- /dev/null
+++ b/src/components/Insights/common/insights/EndpointSlowdownSourceInsight/index.tsx
@@ -0,0 +1,79 @@
+import { Tooltip } from "../../../../common/v3/Tooltip";
+import { EndpointSlowdownSource } from "../../../types";
+import { DurationChange } from "../../DurationChange";
+import { InsightCard } from "../../InsightCard";
+import { ListItem } from "../../InsightCard/ListItem";
+import { ContentContainer, Description } from "../styles";
+import * as s from "./styles";
+import { EndpointSlowdownSourceInsightProps } from "./types";
+
+export const EndpointSlowdownSourceInsight = (
+  props: EndpointSlowdownSourceInsightProps
+) => {
+  const handleSpanLinkClick = (spanCodeObjectId: string) => {
+    props.onAssetLinkClick(spanCodeObjectId, props.insight.type);
+  };
+
+  const p50Sources = props.insight.endpointSlowdownSources?.filter(
+    (x) => x.percentile === "0.5"
+  );
+
+  const p95Sources = props.insight.endpointSlowdownSources?.filter(
+    (x) => x.percentile === "0.95"
+  );
+
+  const renderSourceList = (sources: EndpointSlowdownSource[]) => (
+    <s.SourceList>
+      {sources.map((x) => {
+        const spanName = x.spanInfo.displayName;
+        const spanCodeObjectId = x.spanInfo.spanCodeObjectId;
+
+        return (
+          <s.Source key={spanCodeObjectId}>
+            <Tooltip title={spanName}>
+              <ListItem
+                onClick={() => handleSpanLinkClick(spanCodeObjectId)}
+                name={spanName}
+                buttons={[
+                  <DurationChange
+                    key={"duration"}
+                    currentDuration={x.currentDuration}
+                    previousDuration={x.previousDuration}
+                    changeTime={x.changeTime}
+                  />
+                ]}
+              />
+            </Tooltip>
+          </s.Source>
+        );
+      })}
+    </s.SourceList>
+  );
+
+  return (
+    <InsightCard
+      insight={props.insight}
+      content={
+        <ContentContainer>
+          <s.InsightDescription>
+            Found spans slowing the endpoint
+          </s.InsightDescription>
+          {p50Sources?.length && (
+            <>
+              <Description>Affecting most requests:</Description>
+              {renderSourceList(p50Sources)}
+            </>
+          )}
+          {p95Sources?.length && (
+            <>
+              <Description>Affecting ~5% of requests:</Description>
+              {renderSourceList(p95Sources)}
+            </>
+          )}
+        </ContentContainer>
+      }
+      onRecalculate={props.onRecalculate}
+      onRefresh={props.onRefresh}
+    />
+  );
+};
diff --git a/src/components/Insights/common/insights/EndpointSlowdownSourceInsight/styles.ts b/src/components/Insights/common/insights/EndpointSlowdownSourceInsight/styles.ts
new file mode 100644
index 000000000..38f6813fd
--- /dev/null
+++ b/src/components/Insights/common/insights/EndpointSlowdownSourceInsight/styles.ts
@@ -0,0 +1,17 @@
+import styled from "styled-components";
+import { subscriptRegularTypography } from "../../../../common/App/typographies";
+
+export const SourceList = styled.div`
+  display: flex;
+  flex-direction: column;
+  gap: 4px;
+`;
+
+export const Source = styled.span`
+  gap: 8px;
+`;
+
+export const InsightDescription = styled.span`
+  padding-bottom: 8px;
+  ${subscriptRegularTypography}
+`;
diff --git a/src/components/Insights/common/insights/EndpointSlowdownSourceInsight/types.ts b/src/components/Insights/common/insights/EndpointSlowdownSourceInsight/types.ts
new file mode 100644
index 000000000..6ad58b90f
--- /dev/null
+++ b/src/components/Insights/common/insights/EndpointSlowdownSourceInsight/types.ts
@@ -0,0 +1,13 @@
+import {
+  EndpointSlowdownSourceInsight,
+  InsightProps,
+  InsightType
+} from "../../../types";
+
+export interface EndpointSlowdownSourceInsightProps extends InsightProps {
+  insight: EndpointSlowdownSourceInsight;
+  onAssetLinkClick: (
+    spanCodeObjectId: string,
+    insightType: InsightType
+  ) => void;
+}
diff --git a/src/components/Insights/common/insights/SpanNexusInsight/styles.ts b/src/components/Insights/common/insights/SpanNexusInsight/styles.ts
index 72891baa0..caaa456ff 100644
--- a/src/components/Insights/common/insights/SpanNexusInsight/styles.ts
+++ b/src/components/Insights/common/insights/SpanNexusInsight/styles.ts
@@ -1,8 +1,9 @@
 import styled from "styled-components";
+import { subscriptRegularTypography } from "../../../../common/App/typographies";
 
 export const Description = styled.div`
   display: flex;
   gap: 8px;
-  font-size: 13px;
+  ${subscriptRegularTypography}
   color: ${({ theme }) => theme.colors.v3.text.primary};
 `;