diff --git a/src/main/java/org/prebid/server/bidder/boldwin/BoldwinBidder.java b/src/main/java/org/prebid/server/bidder/boldwin/BoldwinBidder.java
index f89aae35222..d0c702d42bf 100644
--- a/src/main/java/org/prebid/server/bidder/boldwin/BoldwinBidder.java
+++ b/src/main/java/org/prebid/server/bidder/boldwin/BoldwinBidder.java
@@ -4,6 +4,7 @@
 import com.fasterxml.jackson.databind.node.ObjectNode;
 import com.iab.openrtb.request.BidRequest;
 import com.iab.openrtb.request.Imp;
+import com.iab.openrtb.response.Bid;
 import com.iab.openrtb.response.BidResponse;
 import com.iab.openrtb.response.SeatBid;
 import org.apache.commons.collections4.CollectionUtils;
@@ -106,13 +107,13 @@ private HttpRequest<BidRequest> createSingleRequest(Imp imp, BidRequest request)
     public Result<List<BidderBid>> makeBids(BidderCall<BidRequest> httpCall, BidRequest bidRequest) {
         try {
             final BidResponse bidResponse = mapper.decodeValue(httpCall.getResponse().getBody(), BidResponse.class);
-            return Result.withValues(extractBids(httpCall.getRequest().getPayload(), bidResponse));
+            return Result.withValues(extractBids(bidResponse));
         } catch (DecodeException | PreBidException e) {
             return Result.withError(BidderError.badServerResponse(e.getMessage()));
         }
     }
 
-    private static List<BidderBid> extractBids(BidRequest bidRequest, BidResponse bidResponse) {
+    private static List<BidderBid> extractBids(BidResponse bidResponse) {
         if (bidResponse == null || CollectionUtils.isEmpty(bidResponse.getSeatbid())) {
             return Collections.emptyList();
         }
@@ -123,23 +124,19 @@ private static List<BidderBid> extractBids(BidRequest bidRequest, BidResponse bi
                 .filter(Objects::nonNull)
                 .flatMap(Collection::stream)
                 .filter(Objects::nonNull)
-                .map(bid -> BidderBid.of(bid, getBidType(bid.getImpid(), bidRequest.getImp()), bidResponse.getCur()))
+                .map(bid -> BidderBid.of(bid, getBidType(bid), bidResponse.getCur()))
                 .toList();
     }
 
-    private static BidType getBidType(String impId, List<Imp> imps) {
-        for (Imp imp : imps) {
-            if (imp.getId().equals(impId)) {
-                if (imp.getBanner() != null) {
-                    return BidType.banner;
-                } else if (imp.getVideo() != null) {
-                    return BidType.video;
-                } else if (imp.getXNative() != null) {
-                    return BidType.xNative;
-                }
-            }
-        }
-
-        throw new PreBidException("Failed to find impression for ID: '%s'".formatted(impId));
+    private static BidType getBidType(Bid bid) {
+        final Integer mType = bid.getMtype() != null ? bid.getMtype() : 999;
+        return switch (mType) {
+            case 1 -> BidType.banner;
+            case 2 -> BidType.video;
+            case 4 -> BidType.xNative;
+            default -> throw new PreBidException(
+                    "Unable to fetch mediaType in multi-format: %s".formatted(bid.getImpid())
+            );
+        };
     }
 }
diff --git a/src/test/java/org/prebid/server/bidder/boldwin/BoldwinBidderTest.java b/src/test/java/org/prebid/server/bidder/boldwin/BoldwinBidderTest.java
index 6e9b1748cf2..7a02369a396 100644
--- a/src/test/java/org/prebid/server/bidder/boldwin/BoldwinBidderTest.java
+++ b/src/test/java/org/prebid/server/bidder/boldwin/BoldwinBidderTest.java
@@ -157,7 +157,7 @@ public void makeBidsShouldReturnxNativeBid() throws JsonProcessingException {
                         .imp(singletonList(Imp.builder().id("123").xNative(Native.builder().build()).build()))
                         .build(),
                 mapper.writeValueAsString(
-                        givenBidResponse(bidBuilder -> bidBuilder.impid("123"))));
+                        givenBidResponse(bidBuilder -> bidBuilder.mtype(4).impid("123"))));
 
         // when
         final Result<List<BidderBid>> result = target.makeBids(httpCall, null);
@@ -165,7 +165,7 @@ public void makeBidsShouldReturnxNativeBid() throws JsonProcessingException {
         // then
         assertThat(result.getErrors()).isEmpty();
         assertThat(result.getValue())
-                .containsExactly(BidderBid.of(Bid.builder().impid("123").build(), xNative, "USD"));
+                .containsExactly(BidderBid.of(Bid.builder().impid("123").mtype(4).build(), xNative, "USD"));
     }
 
     @Test
@@ -176,7 +176,7 @@ public void makeBidsShouldReturnBannerBid() throws JsonProcessingException {
                         .imp(singletonList(Imp.builder().id("123").banner(Banner.builder().build()).build()))
                         .build(),
                 mapper.writeValueAsString(
-                        givenBidResponse(bidBuilder -> bidBuilder.impid("123"))));
+                        givenBidResponse(bidBuilder -> bidBuilder.mtype(1).impid("123"))));
 
         // when
         final Result<List<BidderBid>> result = target.makeBids(httpCall, null);
@@ -184,7 +184,7 @@ public void makeBidsShouldReturnBannerBid() throws JsonProcessingException {
         // then
         assertThat(result.getErrors()).isEmpty();
         assertThat(result.getValue())
-                .containsExactly(BidderBid.of(Bid.builder().impid("123").build(), banner, "USD"));
+                .containsExactly(BidderBid.of(Bid.builder().mtype(1).impid("123").build(), banner, "USD"));
     }
 
     @Test
@@ -195,7 +195,7 @@ public void makeBidsShouldReturnVideoBid() throws JsonProcessingException {
                         .imp(singletonList(Imp.builder().id("123").video(Video.builder().build()).build()))
                         .build(),
                 mapper.writeValueAsString(
-                        givenBidResponse(bidBuilder -> bidBuilder.impid("123"))));
+                        givenBidResponse(bidBuilder -> bidBuilder.mtype(2).impid("123"))));
 
         // when
         final Result<List<BidderBid>> result = target.makeBids(httpCall, null);
@@ -203,11 +203,11 @@ public void makeBidsShouldReturnVideoBid() throws JsonProcessingException {
         // then
         assertThat(result.getErrors()).isEmpty();
         assertThat(result.getValue())
-                .containsExactly(BidderBid.of(Bid.builder().impid("123").build(), video, "USD"));
+                .containsExactly(BidderBid.of(Bid.builder().mtype(2).impid("123").build(), video, "USD"));
     }
 
     @Test
-    public void makeBidsShouldThrowErrorFailedToFindImpression() throws JsonProcessingException {
+    public void makeBidsShouldThrowErrorUnableToFetchMediaType() throws JsonProcessingException {
         // given
         final BidderCall<BidRequest> httpCall = givenHttpCall(
                 BidRequest.builder()
@@ -223,7 +223,7 @@ public void makeBidsShouldThrowErrorFailedToFindImpression() throws JsonProcessi
         assertThat(result.getValue()).isEmpty();
         assertThat(result.getErrors()).hasSize(1)
                 .allSatisfy(error -> {
-                    assertThat(error.getMessage()).startsWith("Failed to find impression for ID: '123'");
+                    assertThat(error.getMessage()).startsWith("Unable to fetch mediaType in multi-format: 123");
                     assertThat(error.getType()).isEqualTo(BidderError.Type.bad_server_response);
                 });
     }
diff --git a/src/test/resources/org/prebid/server/it/openrtb2/boldwin/test-auction-boldwin-response.json b/src/test/resources/org/prebid/server/it/openrtb2/boldwin/test-auction-boldwin-response.json
index 709556a1d6e..e9242e76699 100644
--- a/src/test/resources/org/prebid/server/it/openrtb2/boldwin/test-auction-boldwin-response.json
+++ b/src/test/resources/org/prebid/server/it/openrtb2/boldwin/test-auction-boldwin-response.json
@@ -16,7 +16,8 @@
               "type": "video"
             },
             "origbidcpm": 1.25
-          }
+          },
+          "mtype": 2
         }
       ],
       "seat": "boldwin",
diff --git a/src/test/resources/org/prebid/server/it/openrtb2/boldwin/test-boldwin-bid-response.json b/src/test/resources/org/prebid/server/it/openrtb2/boldwin/test-boldwin-bid-response.json
index e5865de2093..b00165a1652 100644
--- a/src/test/resources/org/prebid/server/it/openrtb2/boldwin/test-boldwin-bid-response.json
+++ b/src/test/resources/org/prebid/server/it/openrtb2/boldwin/test-boldwin-bid-response.json
@@ -10,7 +10,8 @@
           "crid": "crid",
           "adm": "adm001",
           "h": 600,
-          "w": 800
+          "w": 800,
+          "mtype": 2
         }
       ]
     }