diff --git a/modules/equativBidAdapter.d.ts b/modules/equativBidAdapter.d.ts
index a080d96b2ca..cae82d03c72 100644
--- a/modules/equativBidAdapter.d.ts
+++ b/modules/equativBidAdapter.d.ts
@@ -6,8 +6,7 @@ export interface EquativBidderParams {
   networkId?: number;
   /**
    * Placement identifier used to source inventory.
-   * Forwarded as `imp.ext.bidder.plcmtuuid`. When provided, it takes precedence
-   * over the deprecated `siteId`, `pageId` and `formatId` parameters.
+   * Forwarded as `imp.ext.bidder.plcmtuuid`.
    */
   placementuuid?: string;
   /**
diff --git a/modules/equativBidAdapter.js b/modules/equativBidAdapter.js
index 7bfaff4c301..e78c551e81a 100644
--- a/modules/equativBidAdapter.js
+++ b/modules/equativBidAdapter.js
@@ -207,13 +207,17 @@ export const converter = ortbConverter({
       mergeDeep(imp, { rwdd: bidRequest.mediaTypes.video.ext.rewarded });
     }
 
-    // `placementuuid` is the preferred way to identify inventory. When it is
-    // provided it takes precedence over the <deprecated> `siteId`, `pageId` and
-    // `formatId` </deprecated> parameters, which are kept only to support the ramp-up period.
-    // SSB expects this value in the OpenRTB extension as `plcmtuuid`.
-    const bidder = placementuuid
-      ? { plcmtuuid: placementuuid }
-      : { ...(siteId && { siteId }), ...(pageId && { pageId }), ...(formatId && { formatId }) };
+    // `placementuuid` is the preferred way to identify inventory. The
+    // <deprecated> `siteId`, `pageId` and `formatId` </deprecated> parameters
+    // are kept only to support the ramp-up period. Forward all provided fields
+    // and let the downstream receiver decide which to use.
+    // SSB expects the `placementuuid` value in the OpenRTB extension as `plcmtuuid`.
+    const bidder = {
+      ...(placementuuid && { plcmtuuid: placementuuid }),
+      ...(siteId && { siteId }),
+      ...(pageId && { pageId }),
+      ...(formatId && { formatId })
+    };
     if (Object.keys(bidder).length) {
       mergeDeep(imp.ext, { bidder });
     }
diff --git a/modules/equativBidAdapter.md b/modules/equativBidAdapter.md
index 526f4e4722d..aef75d6f60d 100644
--- a/modules/equativBidAdapter.md
+++ b/modules/equativBidAdapter.md
@@ -45,7 +45,7 @@ var adUnits = [
 | Name            | Scope    | Description                                                                                          | Type     |
 |-----------------|----------|------------------------------------------------------------------------------------------------------|----------|
 | `networkId`     | optional | Equativ network id. Mandatory unless `ortb2.(site\|app\|dooh).publisher.id` is set.                   | `number` |
-| `placementuuid` | optional | Placement identifier used to source inventory. Preferred way to identify inventory; forwarded as `imp.ext.bidder.plcmtuuid` and takes precedence over `siteId`/`pageId`/`formatId` when both are provided. | `string` |
+| `placementuuid` | optional | Placement identifier used to source inventory. Preferred way to identify inventory; forwarded as `imp.ext.bidder.plcmtuuid`. When legacy params are also supplied, all fields are forwarded and the downstream receiver decides which to use. | `string` |
 | `siteId`        | optional | **Deprecated.** Equativ site id. Use `placementuuid` instead. Kept only to support the ramp-up.      | `number` |
 | `pageId`        | optional | **Deprecated.** Equativ page id. Use `placementuuid` instead. Kept only to support the ramp-up.      | `number` |
 | `formatId`      | optional | **Deprecated.** Equativ format id. Use `placementuuid` instead. Kept only to support the ramp-up.    | `number` |
diff --git a/test/spec/modules/equativBidAdapter_spec.js b/test/spec/modules/equativBidAdapter_spec.js
index 1b0825366fe..3f851e69c56 100644
--- a/test/spec/modules/equativBidAdapter_spec.js
+++ b/test/spec/modules/equativBidAdapter_spec.js
@@ -303,7 +303,7 @@ describe('Equativ bid adapter tests', () => {
       });
     });
 
-    it('should let placementuuid take precedence over siteId, pageId, formatId when both are provided', () => {
+    it('should forward plcmtuuid alongside deprecated params when all inventory params are provided', () => {
       const bidRequests = [
         {
           ...DEFAULT_BANNER_BID_REQUESTS[0],
@@ -314,6 +314,9 @@ describe('Equativ bid adapter tests', () => {
       const request = spec.buildRequests(bidRequests, bidderRequest)[0];
       expect(request.data.imp[0].ext.bidder).to.deep.equal({
         plcmtuuid: 'abc-123',
+        siteId: 123,
+        pageId: 456,
+        formatId: 789,
       });
     });