diff --git a/modules/adagioAnalyticsAdapter.js b/modules/adagioAnalyticsAdapter.js
index c64535f74b5..2f015f07c31 100644
--- a/modules/adagioAnalyticsAdapter.js
+++ b/modules/adagioAnalyticsAdapter.js
@@ -3,7 +3,7 @@
  */
 
 import { _ADAGIO, getBestWindowForAdagio } from '../libraries/adagioUtils/adagioUtils.js';
-import { deepAccess, logError, logInfo, logWarn } from '../src/utils.js';
+import { deepAccess, logError, logInfo, logWarn, isPlainObject } from '../src/utils.js';
 import { BANNER } from '../src/mediaTypes.js';
 import { EVENTS } from '../src/constants.js';
 import adapter from '../libraries/analyticsAdapter/AnalyticsAdapter.js';
@@ -378,6 +378,33 @@ function handlerAdRender(event, isSuccess) {
   sendNewBeacon(auctionId, adUnitCode);
 };
 
+/**
+ * handlerPbsAnalytics add to the cache data coming from Adagio PBS AdResponse.
+ * The data is retrieved from an AnalyticsTag (set by a custom PBS module named `adg-pba`),
+ * located in the AdResponse at `response.ext.prebid.analytics.tags[].pba`.
+ */
+function handlerPbsAnalytics(event) {
+  const pbaByAdUnit = event.atag.find(e => {
+    return e.module === 'adg-pba'
+  })?.pba;
+
+  if (!pbaByAdUnit) {
+    return;
+  }
+
+  const adUnitCodes = cache.getAllAdUnitCodes(event.auctionId);
+
+  adUnitCodes.forEach(adUnitCode => {
+    const pba = pbaByAdUnit[adUnitCode]
+
+    if (isPlainObject(pba)) {
+      cache.updateAuction(event.auctionId, adUnitCode, {
+        ...addKeyPrefix(pba, 'e_')
+      });
+    }
+  })
+}
+
 /**
  * END HANDLERS
  */
@@ -405,6 +432,9 @@ let adagioAdapter = Object.assign(adapter({ emptyUrl, analyticsType }), {
         case EVENTS.AD_RENDER_FAILED:
           handlerAdRender(args, eventType === EVENTS.AD_RENDER_SUCCEEDED);
           break;
+        case EVENTS.PBS_ANALYTICS:
+          handlerPbsAnalytics(args);
+          break;
       }
     } catch (error) {
       logError('Error on Adagio Analytics Adapter', error);
diff --git a/test/spec/modules/adagioAnalyticsAdapter_spec.js b/test/spec/modules/adagioAnalyticsAdapter_spec.js
index 7cb0e6c58be..fd899a1c864 100644
--- a/test/spec/modules/adagioAnalyticsAdapter_spec.js
+++ b/test/spec/modules/adagioAnalyticsAdapter_spec.js
@@ -612,6 +612,22 @@ const AUCTION_END_ANOTHER_NOBID = Object.assign({}, AUCTION_INIT_ANOTHER, {
   bidsReceived: []
 });
 
+const PBS_ANALYTICS_ANOTHER = {
+  atag: [
+    {
+      stage: 'auction-response',
+      module: 'adg-pba',
+      pba: {
+        '/19968336/header-bid-tag-1': {
+          st_id: '53',
+          splt_cs_id: '731'
+        }
+      }
+    }
+  ],
+  auctionId: AUCTION_ID,
+}
+
 const MOCK = {
   SET_TARGETING: {
     [BID_ADAGIO.adUnitCode]: BID_ADAGIO.adserverTargeting,
@@ -972,5 +988,59 @@ describe('adagio analytics adapter', () => {
         expect(search.bdrs_cpm).to.equal('1.42,,,');
       }
     });
+
+    it('set adg-pbs aTags in beacon', () => {
+      events.emit(EVENTS.AUCTION_INIT, MOCK.AUCTION_INIT.another);
+      events.emit(EVENTS.BID_RESPONSE, MOCK.BID_RESPONSE.another);
+      events.emit(EVENTS.PBS_ANALYTICS, PBS_ANALYTICS_ANOTHER);
+      events.emit(EVENTS.AUCTION_END, MOCK.AUCTION_END.another);
+
+      expect(server.requests.length).to.equal(4, 'requests count');
+
+      // server.requests[0] -> AUCTION_INIT - AdUnit header-bid-tag-1
+      {
+        const { search } = utils.parseUrl(server.requests[0].url);
+
+        expect(search.adu_code).to.equal('/19968336/header-bid-tag-1');
+        expect(search.v).to.equal('1');
+
+        expect(search.e_st_id).to.be.undefined;
+        expect(search.e_splt_cs_id).to.be.undefined;
+      }
+
+      // server.requests[1] -> AUCTION_INIT - AdUnit footer-bid-tag-1
+      {
+        const { search } = utils.parseUrl(server.requests[1].url);
+
+        expect(search.adu_code).to.equal('/19968336/footer-bid-tag-1');
+        expect(search.v).to.equal('1');
+
+        expect(search.e_st_id).to.be.undefined;
+        expect(search.e_splt_cs_id).to.be.undefined;
+      }
+
+      // server.requests[2] -> AUCTION_END - AdUnit header-bid-tag-1
+      {
+        const { search } = utils.parseUrl(server.requests[2].url);
+
+        expect(search.adu_code).to.equal('/19968336/header-bid-tag-1');
+        expect(search.v).to.equal('2');
+
+        // The adg-pbs aTags fields are set in the beacon !
+        expect(search.e_st_id).to.equal('53');
+        expect(search.e_splt_cs_id).to.equal('731');
+      }
+
+      // server.requests[3] -> AUCTION_END - AdUnit footer-bid-tag-1
+      {
+        const { search } = utils.parseUrl(server.requests[3].url);
+
+        expect(search.adu_code).to.equal('/19968336/footer-bid-tag-1');
+        expect(search.v).to.equal('2');
+
+        expect(search.e_st_id).to.be.undefined;
+        expect(search.e_splt_cs_id).to.be.undefined;
+      }
+    });
   });
 });