diff --git a/x-pack/plugins/security_solution/public/detections/components/alerts_kpis/alerts_count_panel/alerts_count.test.tsx b/x-pack/plugins/security_solution/public/detections/components/alerts_kpis/alerts_count_panel/alerts_count.test.tsx
index 561126f3264ad..4fce0361d5d13 100644
--- a/x-pack/plugins/security_solution/public/detections/components/alerts_kpis/alerts_count_panel/alerts_count.test.tsx
+++ b/x-pack/plugins/security_solution/public/detections/components/alerts_kpis/alerts_count_panel/alerts_count.test.tsx
@@ -18,6 +18,11 @@ import { AlertsCountAggregation } from './types';
 jest.mock('../../../../common/lib/kibana');
 const mockDispatch = jest.fn();
 
+jest.mock('react-router-dom', () => {
+  const actual = jest.requireActual('react-router-dom');
+  return { ...actual, useLocation: jest.fn().mockReturnValue({ pathname: '' }) };
+});
+
 jest.mock('react-redux', () => {
   const original = jest.requireActual('react-redux');
   return {
diff --git a/x-pack/plugins/security_solution/public/detections/components/alerts_kpis/alerts_count_panel/helpers.tsx b/x-pack/plugins/security_solution/public/detections/components/alerts_kpis/alerts_count_panel/helpers.tsx
index bd747fb637cb8..cd407a125cdb6 100644
--- a/x-pack/plugins/security_solution/public/detections/components/alerts_kpis/alerts_count_panel/helpers.tsx
+++ b/x-pack/plugins/security_solution/public/detections/components/alerts_kpis/alerts_count_panel/helpers.tsx
@@ -6,10 +6,9 @@
  */
 
 import { DEFAULT_MAX_TABLE_QUERY_SIZE } from '../../../../../common/constants';
-import type { AlertsStackByField } from '../common/types';
 
 export const getAlertsCountQuery = (
-  stackByField: AlertsStackByField,
+  stackByField: string,
   from: string,
   to: string,
   additionalFilters: Array<{
diff --git a/x-pack/plugins/security_solution/public/detections/components/alerts_kpis/alerts_count_panel/index.test.tsx b/x-pack/plugins/security_solution/public/detections/components/alerts_kpis/alerts_count_panel/index.test.tsx
index 9660916d4f32c..d0b05587a4711 100644
--- a/x-pack/plugins/security_solution/public/detections/components/alerts_kpis/alerts_count_panel/index.test.tsx
+++ b/x-pack/plugins/security_solution/public/detections/components/alerts_kpis/alerts_count_panel/index.test.tsx
@@ -13,6 +13,11 @@ import { TestProviders } from '../../../../common/mock';
 
 import { AlertsCountPanel } from './index';
 
+jest.mock('react-router-dom', () => {
+  const actual = jest.requireActual('react-router-dom');
+  return { ...actual, useLocation: jest.fn().mockReturnValue({ pathname: '' }) };
+});
+
 describe('AlertsCountPanel', () => {
   const defaultProps = {
     signalIndexName: 'signalIndexName',
diff --git a/x-pack/plugins/security_solution/public/detections/components/alerts_kpis/alerts_count_panel/index.tsx b/x-pack/plugins/security_solution/public/detections/components/alerts_kpis/alerts_count_panel/index.tsx
index 94b09c4a5ea21..b69f4f1f498f9 100644
--- a/x-pack/plugins/security_solution/public/detections/components/alerts_kpis/alerts_count_panel/index.tsx
+++ b/x-pack/plugins/security_solution/public/detections/components/alerts_kpis/alerts_count_panel/index.tsx
@@ -21,8 +21,7 @@ import * as i18n from './translations';
 import { AlertsCount } from './alerts_count';
 import type { AlertsCountAggregation } from './types';
 import { DEFAULT_STACK_BY_FIELD } from '../common/config';
-import type { AlertsStackByField } from '../common/types';
-import { KpiPanel, StackBySelect } from '../common/components';
+import { KpiPanel, StackByComboBox } from '../common/components';
 import { useInspectButton } from '../common/hooks';
 
 export const DETECTIONS_ALERTS_COUNT_ID = 'detections-alerts-count';
@@ -39,8 +38,7 @@ export const AlertsCountPanel = memo<AlertsCountPanelProps>(
 
     // create a unique, but stable (across re-renders) query id
     const uniqueQueryId = useMemo(() => `${DETECTIONS_ALERTS_COUNT_ID}-${uuid.v4()}`, []);
-    const [selectedStackByOption, setSelectedStackByOption] =
-      useState<AlertsStackByField>(DEFAULT_STACK_BY_FIELD);
+    const [selectedStackByOption, setSelectedStackByOption] = useState(DEFAULT_STACK_BY_FIELD);
 
     // TODO: Once we are past experimental phase this code should be removed
     // const fetchMethod = useIsExperimentalFeatureEnabled('ruleRegistryEnabled')
@@ -99,7 +97,7 @@ export const AlertsCountPanel = memo<AlertsCountPanelProps>(
             titleSize="s"
             hideSubtitle
           >
-            <StackBySelect selected={selectedStackByOption} onSelect={setSelectedStackByOption} />
+            <StackByComboBox selected={selectedStackByOption} onSelect={setSelectedStackByOption} />
           </HeaderSection>
           <AlertsCount
             data={alertsData}
diff --git a/x-pack/plugins/security_solution/public/detections/components/alerts_kpis/alerts_histogram_panel/helpers.tsx b/x-pack/plugins/security_solution/public/detections/components/alerts_kpis/alerts_histogram_panel/helpers.tsx
index 5c3808843aae7..a4768ac3c4c8f 100644
--- a/x-pack/plugins/security_solution/public/detections/components/alerts_kpis/alerts_histogram_panel/helpers.tsx
+++ b/x-pack/plugins/security_solution/public/detections/components/alerts_kpis/alerts_histogram_panel/helpers.tsx
@@ -10,7 +10,6 @@ import moment from 'moment';
 
 import type { HistogramData, AlertsAggregation, AlertsBucket, AlertsGroupBucket } from './types';
 import type { AlertSearchResponse } from '../../../containers/detection_engine/alerts/types';
-import type { AlertsStackByField } from '../common/types';
 
 const EMPTY_ALERTS_DATA: HistogramData[] = [];
 
@@ -33,7 +32,7 @@ export const formatAlertsData = (alertsData: AlertSearchResponse<{}, AlertsAggre
 };
 
 export const getAlertsHistogramQuery = (
-  stackByField: AlertsStackByField,
+  stackByField: string,
   from: string,
   to: string,
   additionalFilters: Array<{
diff --git a/x-pack/plugins/security_solution/public/detections/components/alerts_kpis/alerts_histogram_panel/index.test.tsx b/x-pack/plugins/security_solution/public/detections/components/alerts_kpis/alerts_histogram_panel/index.test.tsx
index 09c184bb62bd5..eb06f85a0a76f 100644
--- a/x-pack/plugins/security_solution/public/detections/components/alerts_kpis/alerts_histogram_panel/index.test.tsx
+++ b/x-pack/plugins/security_solution/public/detections/components/alerts_kpis/alerts_histogram_panel/index.test.tsx
@@ -22,6 +22,7 @@ jest.mock('react-router-dom', () => {
     ...originalModule,
     createHref: jest.fn(),
     useHistory: jest.fn(),
+    useLocation: jest.fn().mockReturnValue({ pathname: '' }),
   };
 });
 
@@ -37,9 +38,21 @@ jest.mock('../../../../common/lib/kibana/kibana_react', () => {
           navigateToApp: mockNavigateToApp,
           getUrlForApp: jest.fn(),
         },
+        data: {
+          search: {
+            search: jest.fn(),
+          },
+        },
         uiSettings: {
           get: jest.fn(),
         },
+        notifications: {
+          toasts: {
+            addWarning: jest.fn(),
+            addError: jest.fn(),
+            addSuccess: jest.fn(),
+          },
+        },
       },
     }),
   };
diff --git a/x-pack/plugins/security_solution/public/detections/components/alerts_kpis/alerts_histogram_panel/index.tsx b/x-pack/plugins/security_solution/public/detections/components/alerts_kpis/alerts_histogram_panel/index.tsx
index 873b5d40184ef..11dbb4da863db 100644
--- a/x-pack/plugins/security_solution/public/detections/components/alerts_kpis/alerts_histogram_panel/index.tsx
+++ b/x-pack/plugins/security_solution/public/detections/components/alerts_kpis/alerts_histogram_panel/index.tsx
@@ -41,7 +41,7 @@ import { LinkButton } from '../../../../common/components/links';
 import { SecurityPageName } from '../../../../app/types';
 import { DEFAULT_STACK_BY_FIELD, PANEL_HEIGHT } from '../common/config';
 import type { AlertsStackByField } from '../common/types';
-import { KpiPanel, StackBySelect } from '../common/components';
+import { KpiPanel, StackByComboBox } from '../common/components';
 
 import { useInspectButton } from '../common/hooks';
 
@@ -109,7 +109,7 @@ export const AlertsHistogramPanel = memo<AlertsHistogramPanelProps>(
     const [isInspectDisabled, setIsInspectDisabled] = useState(false);
     const [defaultNumberFormat] = useUiSetting$<string>(DEFAULT_NUMBER_FORMAT);
     const [totalAlertsObj, setTotalAlertsObj] = useState<AlertsTotal>(defaultTotalAlertsObj);
-    const [selectedStackByOption, setSelectedStackByOption] = useState<AlertsStackByField>(
+    const [selectedStackByOption, setSelectedStackByOption] = useState<string>(
       onlyField == null ? defaultStackByOption : onlyField
     );
 
@@ -276,10 +276,12 @@ export const AlertsHistogramPanel = memo<AlertsHistogramPanelProps>(
             <EuiFlexGroup alignItems="center" gutterSize="none">
               <EuiFlexItem grow={false}>
                 {showStackBy && (
-                  <StackBySelect
-                    selected={selectedStackByOption}
-                    onSelect={setSelectedStackByOption}
-                  />
+                  <>
+                    <StackByComboBox
+                      selected={selectedStackByOption}
+                      onSelect={setSelectedStackByOption}
+                    />
+                  </>
                 )}
                 {headerChildren != null && headerChildren}
               </EuiFlexItem>
diff --git a/x-pack/plugins/security_solution/public/detections/components/alerts_kpis/common/components.tsx b/x-pack/plugins/security_solution/public/detections/components/alerts_kpis/common/components.tsx
index 53d41835d6bb9..6a56f7bc220ac 100644
--- a/x-pack/plugins/security_solution/public/detections/components/alerts_kpis/common/components.tsx
+++ b/x-pack/plugins/security_solution/public/detections/components/alerts_kpis/common/components.tsx
@@ -5,11 +5,11 @@
  * 2.0.
  */
 
-import { EuiPanel, EuiSelect } from '@elastic/eui';
+import { EuiPanel, EuiComboBox } from '@elastic/eui';
 import styled from 'styled-components';
-import React, { useCallback } from 'react';
-import { PANEL_HEIGHT, MOBILE_PANEL_HEIGHT, alertsStackByOptions } from './config';
-import type { AlertsStackByField } from './types';
+import React, { useCallback, useMemo } from 'react';
+import { PANEL_HEIGHT, MOBILE_PANEL_HEIGHT } from './config';
+import { useStackByFields } from './hooks';
 import * as i18n from './translations';
 
 export const KpiPanel = styled(EuiPanel)<{ height?: number }>`
@@ -25,24 +25,45 @@ export const KpiPanel = styled(EuiPanel)<{ height?: number }>`
   }
 `;
 interface StackedBySelectProps {
-  selected: AlertsStackByField;
-  onSelect: (selected: AlertsStackByField) => void;
+  selected: string;
+  onSelect: (selected: string) => void;
 }
 
-export const StackBySelect: React.FC<StackedBySelectProps> = ({ selected, onSelect }) => {
-  const setSelectedOptionCallback = useCallback(
-    (event: React.ChangeEvent<HTMLSelectElement>) => {
-      onSelect(event.target.value as AlertsStackByField);
+export const StackByComboBoxWrapper = styled.div`
+  width: 400px;
+`;
+
+export const StackByComboBox: React.FC<StackedBySelectProps> = ({ selected, onSelect }) => {
+  const onChange = useCallback(
+    (options) => {
+      if (options && options.length > 0) {
+        onSelect(options[0].value);
+      } else {
+        onSelect('');
+      }
     },
     [onSelect]
   );
-
+  const selectedOptions = useMemo(() => {
+    return [{ label: selected, value: selected }];
+  }, [selected]);
+  const stackOptions = useStackByFields();
+  const singleSelection = useMemo(() => {
+    return { asPlainText: true };
+  }, []);
   return (
-    <EuiSelect
-      onChange={setSelectedOptionCallback}
-      options={alertsStackByOptions}
-      prepend={i18n.STACK_BY_LABEL}
-      value={selected}
-    />
+    <StackByComboBoxWrapper>
+      <EuiComboBox
+        aria-label={i18n.STACK_BY_ARIA_LABEL}
+        placeholder={i18n.STACK_BY_PLACEHOLDER}
+        prepend={i18n.STACK_BY_LABEL}
+        singleSelection={singleSelection}
+        sortMatchesBy="startsWith"
+        options={stackOptions}
+        selectedOptions={selectedOptions}
+        compressed
+        onChange={onChange}
+      />
+    </StackByComboBoxWrapper>
   );
 };
diff --git a/x-pack/plugins/security_solution/public/detections/components/alerts_kpis/common/hooks.test.tsx b/x-pack/plugins/security_solution/public/detections/components/alerts_kpis/common/hooks.test.tsx
index ad0fc1fa7ac61..d68c5c303cfd7 100644
--- a/x-pack/plugins/security_solution/public/detections/components/alerts_kpis/common/hooks.test.tsx
+++ b/x-pack/plugins/security_solution/public/detections/components/alerts_kpis/common/hooks.test.tsx
@@ -5,8 +5,16 @@
  * 2.0.
  */
 
+import React from 'react';
 import { renderHook } from '@testing-library/react-hooks';
-import { useInspectButton, UseInspectButtonParams } from './hooks';
+import { useInspectButton, UseInspectButtonParams, useStackByFields } from './hooks';
+import { mockBrowserFields } from '../../../../common/containers/source/mock';
+import { TestProviders } from '../../../../common/mock';
+
+jest.mock('react-router-dom', () => {
+  const actual = jest.requireActual('react-router-dom');
+  return { ...actual, useLocation: jest.fn().mockReturnValue({ pathname: '' }) };
+});
 
 describe('hooks', () => {
   describe('useInspectButton', () => {
@@ -43,4 +51,22 @@ describe('hooks', () => {
       expect(mockDeleteQuery).toHaveBeenCalledWith({ id: defaultParams.uniqueQueryId });
     });
   });
+
+  describe('useStackByFields', () => {
+    jest.mock('../../../../common/containers/sourcerer', () => ({
+      useSourcererDataView: jest.fn().mockReturnValue({ browserFields: mockBrowserFields }),
+    }));
+    it('returns only aggregateable fields', () => {
+      const wrapper = ({ children }: { children: JSX.Element }) => (
+        <TestProviders>{children}</TestProviders>
+      );
+      const { result, unmount } = renderHook(() => useStackByFields(), { wrapper });
+      const aggregateableFields = result.current;
+      unmount();
+      expect(aggregateableFields?.find((field) => field.label === 'agent.id')).toBeTruthy();
+      expect(
+        aggregateableFields?.find((field) => field.label === 'nestedField.firstAttributes')
+      ).toBe(undefined);
+    });
+  });
 });
diff --git a/x-pack/plugins/security_solution/public/detections/components/alerts_kpis/common/hooks.ts b/x-pack/plugins/security_solution/public/detections/components/alerts_kpis/common/hooks.ts
index 6375e2b0c27fb..65b87670810b0 100644
--- a/x-pack/plugins/security_solution/public/detections/components/alerts_kpis/common/hooks.ts
+++ b/x-pack/plugins/security_solution/public/detections/components/alerts_kpis/common/hooks.ts
@@ -5,8 +5,13 @@
  * 2.0.
  */
 
-import { useEffect } from 'react';
+import { useEffect, useState, useMemo } from 'react';
+import { useLocation } from 'react-router-dom';
+import type { EuiComboBoxOptionOption } from '@elastic/eui';
+import type { BrowserField } from '../../../../../../timelines/common';
 import type { GlobalTimeArgs } from '../../../../common/containers/use_global_time';
+import { getScopeFromPath, useSourcererDataView } from '../../../../common/containers/sourcerer';
+import { getAllFieldsByName } from '../../../../common/containers/source';
 
 export interface UseInspectButtonParams extends Pick<GlobalTimeArgs, 'setQuery' | 'deleteQuery'> {
   response: string;
@@ -15,6 +20,7 @@ export interface UseInspectButtonParams extends Pick<GlobalTimeArgs, 'setQuery'
   uniqueQueryId: string;
   loading: boolean;
 }
+
 /**
  * * Add query to inspect button utility.
  * * Delete query from inspect button utility when component unmounts
@@ -48,3 +54,30 @@ export const useInspectButton = ({
     };
   }, [setQuery, loading, response, request, refetch, uniqueQueryId, deleteQuery]);
 };
+
+function getAggregatableFields(fields: { [fieldName: string]: Partial<BrowserField> }) {
+  return Object.entries(fields).reduce<EuiComboBoxOptionOption[]>(
+    (filteredOptions: EuiComboBoxOptionOption[], [key, field]) => {
+      if (field.aggregatable === true) {
+        return [...filteredOptions, { label: key, value: key }];
+      } else {
+        return filteredOptions;
+      }
+    },
+    []
+  );
+}
+
+export const useStackByFields = () => {
+  const { pathname } = useLocation();
+
+  const { browserFields } = useSourcererDataView(getScopeFromPath(pathname));
+  const allFields = useMemo(() => getAllFieldsByName(browserFields), [browserFields]);
+  const [stackByFieldOptions, setStackByFieldOptions] = useState(() =>
+    getAggregatableFields(allFields)
+  );
+  useEffect(() => {
+    setStackByFieldOptions(getAggregatableFields(allFields));
+  }, [allFields]);
+  return useMemo(() => stackByFieldOptions, [stackByFieldOptions]);
+};
diff --git a/x-pack/plugins/security_solution/public/detections/components/alerts_kpis/common/translations.ts b/x-pack/plugins/security_solution/public/detections/components/alerts_kpis/common/translations.ts
index d99e1d4744ae7..d45563675154e 100644
--- a/x-pack/plugins/security_solution/public/detections/components/alerts_kpis/common/translations.ts
+++ b/x-pack/plugins/security_solution/public/detections/components/alerts_kpis/common/translations.ts
@@ -13,3 +13,17 @@ export const STACK_BY_LABEL = i18n.translate(
     defaultMessage: 'Stack by',
   }
 );
+
+export const STACK_BY_PLACEHOLDER = i18n.translate(
+  'xpack.securitySolution.detectionEngine.alerts.histogram.stackByOptions.stackByPlaceholder',
+  {
+    defaultMessage: 'Select a field to stack by',
+  }
+);
+
+export const STACK_BY_ARIA_LABEL = i18n.translate(
+  'xpack.securitySolution.detectionEngine.alerts.histogram.stackByOptions.stackByAriaLabel',
+  {
+    defaultMessage: 'Stack the alerts histogram by a field value',
+  }
+);
diff --git a/x-pack/plugins/security_solution/public/detections/pages/detection_engine/detection_engine.test.tsx b/x-pack/plugins/security_solution/public/detections/pages/detection_engine/detection_engine.test.tsx
index eeb22a2aa071c..c5d053c57fc97 100644
--- a/x-pack/plugins/security_solution/public/detections/pages/detection_engine/detection_engine.test.tsx
+++ b/x-pack/plugins/security_solution/public/detections/pages/detection_engine/detection_engine.test.tsx
@@ -23,6 +23,7 @@ import { useSourcererDataView } from '../../../common/containers/sourcerer';
 import { createStore, State } from '../../../common/store';
 import { mockHistory, Router } from '../../../common/mock/router';
 import { mockTimelines } from '../../../common/mock/mock_timelines_plugin';
+import { mockBrowserFields } from '../../../common/containers/source/mock';
 
 // Test will fail because we will to need to mock some core services to make the test work
 // For now let's forget about SiemSearchBar and QueryBar
@@ -71,6 +72,9 @@ jest.mock('../../../common/lib/kibana', () => {
             siem: { crud_alerts: true, read_alerts: true },
           },
         },
+        uiSettings: {
+          get: jest.fn(),
+        },
         timelines: { ...mockTimelines },
         data: {
           query: {
@@ -113,6 +117,7 @@ describe('DetectionEnginePageComponent', () => {
     (useSourcererDataView as jest.Mock).mockReturnValue({
       indicesExist: true,
       indexPattern: {},
+      browserFields: mockBrowserFields,
     });
   });