diff --git a/crates/proto/src/gen/penumbra.view.v1.rs b/crates/proto/src/gen/penumbra.view.v1.rs
index 5ec54bf491..662c7df3e8 100644
--- a/crates/proto/src/gen/penumbra.view.v1.rs
+++ b/crates/proto/src/gen/penumbra.view.v1.rs
@@ -1543,6 +1543,9 @@ pub struct OwnedPositionIdsRequest {
     pub trading_pair: ::core::option::Option<
         super::super::core::component::dex::v1::TradingPair,
     >,
+    /// If present, return only positions for this subaccount index.
+    #[prost(message, optional, tag = "3")]
+    pub subaccount: ::core::option::Option<super::super::core::keys::v1::AddressIndex>,
 }
 impl ::prost::Name for OwnedPositionIdsRequest {
     const NAME: &'static str = "OwnedPositionIdsRequest";
@@ -1558,6 +1561,9 @@ pub struct OwnedPositionIdsResponse {
     pub position_id: ::core::option::Option<
         super::super::core::component::dex::v1::PositionId,
     >,
+    /// The subaccount this position belongs to.
+    #[prost(message, optional, tag = "2")]
+    pub subaccount: ::core::option::Option<super::super::core::keys::v1::AddressIndex>,
 }
 impl ::prost::Name for OwnedPositionIdsResponse {
     const NAME: &'static str = "OwnedPositionIdsResponse";
diff --git a/crates/proto/src/gen/penumbra.view.v1.serde.rs b/crates/proto/src/gen/penumbra.view.v1.serde.rs
index d5b11ff8db..44858b4f5f 100644
--- a/crates/proto/src/gen/penumbra.view.v1.serde.rs
+++ b/crates/proto/src/gen/penumbra.view.v1.serde.rs
@@ -4196,6 +4196,9 @@ impl serde::Serialize for OwnedPositionIdsRequest {
         if self.trading_pair.is_some() {
             len += 1;
         }
+        if self.subaccount.is_some() {
+            len += 1;
+        }
         let mut struct_ser = serializer.serialize_struct("penumbra.view.v1.OwnedPositionIdsRequest", len)?;
         if let Some(v) = self.position_state.as_ref() {
             struct_ser.serialize_field("positionState", v)?;
@@ -4203,6 +4206,9 @@ impl serde::Serialize for OwnedPositionIdsRequest {
         if let Some(v) = self.trading_pair.as_ref() {
             struct_ser.serialize_field("tradingPair", v)?;
         }
+        if let Some(v) = self.subaccount.as_ref() {
+            struct_ser.serialize_field("subaccount", v)?;
+        }
         struct_ser.end()
     }
 }
@@ -4217,12 +4223,14 @@ impl<'de> serde::Deserialize<'de> for OwnedPositionIdsRequest {
             "positionState",
             "trading_pair",
             "tradingPair",
+            "subaccount",
         ];
 
         #[allow(clippy::enum_variant_names)]
         enum GeneratedField {
             PositionState,
             TradingPair,
+            Subaccount,
             __SkipField__,
         }
         impl<'de> serde::Deserialize<'de> for GeneratedField {
@@ -4247,6 +4255,7 @@ impl<'de> serde::Deserialize<'de> for OwnedPositionIdsRequest {
                         match value {
                             "positionState" | "position_state" => Ok(GeneratedField::PositionState),
                             "tradingPair" | "trading_pair" => Ok(GeneratedField::TradingPair),
+                            "subaccount" => Ok(GeneratedField::Subaccount),
                             _ => Ok(GeneratedField::__SkipField__),
                         }
                     }
@@ -4268,6 +4277,7 @@ impl<'de> serde::Deserialize<'de> for OwnedPositionIdsRequest {
             {
                 let mut position_state__ = None;
                 let mut trading_pair__ = None;
+                let mut subaccount__ = None;
                 while let Some(k) = map_.next_key()? {
                     match k {
                         GeneratedField::PositionState => {
@@ -4282,6 +4292,12 @@ impl<'de> serde::Deserialize<'de> for OwnedPositionIdsRequest {
                             }
                             trading_pair__ = map_.next_value()?;
                         }
+                        GeneratedField::Subaccount => {
+                            if subaccount__.is_some() {
+                                return Err(serde::de::Error::duplicate_field("subaccount"));
+                            }
+                            subaccount__ = map_.next_value()?;
+                        }
                         GeneratedField::__SkipField__ => {
                             let _ = map_.next_value::<serde::de::IgnoredAny>()?;
                         }
@@ -4290,6 +4306,7 @@ impl<'de> serde::Deserialize<'de> for OwnedPositionIdsRequest {
                 Ok(OwnedPositionIdsRequest {
                     position_state: position_state__,
                     trading_pair: trading_pair__,
+                    subaccount: subaccount__,
                 })
             }
         }
@@ -4307,10 +4324,16 @@ impl serde::Serialize for OwnedPositionIdsResponse {
         if self.position_id.is_some() {
             len += 1;
         }
+        if self.subaccount.is_some() {
+            len += 1;
+        }
         let mut struct_ser = serializer.serialize_struct("penumbra.view.v1.OwnedPositionIdsResponse", len)?;
         if let Some(v) = self.position_id.as_ref() {
             struct_ser.serialize_field("positionId", v)?;
         }
+        if let Some(v) = self.subaccount.as_ref() {
+            struct_ser.serialize_field("subaccount", v)?;
+        }
         struct_ser.end()
     }
 }
@@ -4323,11 +4346,13 @@ impl<'de> serde::Deserialize<'de> for OwnedPositionIdsResponse {
         const FIELDS: &[&str] = &[
             "position_id",
             "positionId",
+            "subaccount",
         ];
 
         #[allow(clippy::enum_variant_names)]
         enum GeneratedField {
             PositionId,
+            Subaccount,
             __SkipField__,
         }
         impl<'de> serde::Deserialize<'de> for GeneratedField {
@@ -4351,6 +4376,7 @@ impl<'de> serde::Deserialize<'de> for OwnedPositionIdsResponse {
                     {
                         match value {
                             "positionId" | "position_id" => Ok(GeneratedField::PositionId),
+                            "subaccount" => Ok(GeneratedField::Subaccount),
                             _ => Ok(GeneratedField::__SkipField__),
                         }
                     }
@@ -4371,6 +4397,7 @@ impl<'de> serde::Deserialize<'de> for OwnedPositionIdsResponse {
                     V: serde::de::MapAccess<'de>,
             {
                 let mut position_id__ = None;
+                let mut subaccount__ = None;
                 while let Some(k) = map_.next_key()? {
                     match k {
                         GeneratedField::PositionId => {
@@ -4379,6 +4406,12 @@ impl<'de> serde::Deserialize<'de> for OwnedPositionIdsResponse {
                             }
                             position_id__ = map_.next_value()?;
                         }
+                        GeneratedField::Subaccount => {
+                            if subaccount__.is_some() {
+                                return Err(serde::de::Error::duplicate_field("subaccount"));
+                            }
+                            subaccount__ = map_.next_value()?;
+                        }
                         GeneratedField::__SkipField__ => {
                             let _ = map_.next_value::<serde::de::IgnoredAny>()?;
                         }
@@ -4386,6 +4419,7 @@ impl<'de> serde::Deserialize<'de> for OwnedPositionIdsResponse {
                 }
                 Ok(OwnedPositionIdsResponse {
                     position_id: position_id__,
+                    subaccount: subaccount__,
                 })
             }
         }
diff --git a/crates/proto/src/gen/proto_descriptor.bin.no_lfs b/crates/proto/src/gen/proto_descriptor.bin.no_lfs
index 895f0f7259..4c9fd7802b 100644
Binary files a/crates/proto/src/gen/proto_descriptor.bin.no_lfs and b/crates/proto/src/gen/proto_descriptor.bin.no_lfs differ
diff --git a/crates/view/src/client.rs b/crates/view/src/client.rs
index be7edbccd8..18d3a11a25 100644
--- a/crates/view/src/client.rs
+++ b/crates/view/src/client.rs
@@ -709,6 +709,7 @@ where
                 tonic::Request::new(pb::OwnedPositionIdsRequest {
                     trading_pair: trading_pair.map(TryInto::try_into).transpose()?,
                     position_state: position_state.map(TryInto::try_into).transpose()?,
+                    subaccount: None,
                 }),
             );
 
diff --git a/crates/view/src/service.rs b/crates/view/src/service.rs
index 8e3c8ce26c..cd116b4cfa 100644
--- a/crates/view/src/service.rs
+++ b/crates/view/src/service.rs
@@ -1717,6 +1717,7 @@ impl ViewService for ViewServer {
         let pb::OwnedPositionIdsRequest {
             position_state,
             trading_pair,
+            subaccount: _,
         } = request.into_inner();
 
         let position_state: Option<position::State> = position_state
@@ -1741,6 +1742,9 @@ impl ViewService for ViewServer {
             for id in ids {
                 yield pb::OwnedPositionIdsResponse{
                     position_id: Some(id.into()),
+                    // The rust view server does not index positions by subaccount,
+                    // so this information is invisible to it.
+                    subaccount: None,
                 }
             }
         };
diff --git a/proto/penumbra/penumbra/view/v1/view.proto b/proto/penumbra/penumbra/view/v1/view.proto
index 5f1ffb41b5..2af3e5cc52 100644
--- a/proto/penumbra/penumbra/view/v1/view.proto
+++ b/proto/penumbra/penumbra/view/v1/view.proto
@@ -153,8 +153,7 @@ service ViewService {
 
 // There's only one transparent address per wallet, so this request has no parameters;
 // the message exists to satisfy forward-compatibility properties.
-message TransparentAddressRequest {
-}
+message TransparentAddressRequest {}
 
 message TransparentAddressResponse {
   // The raw (binary) transparent address
@@ -700,10 +699,14 @@ message OwnedPositionIdsRequest {
   core.component.dex.v1.PositionState position_state = 1;
   // If present, return only positions for this trading pair.
   core.component.dex.v1.TradingPair trading_pair = 2;
+  // If present, return only positions for this subaccount index.
+  core.keys.v1.AddressIndex subaccount = 3;
 }
 
 message OwnedPositionIdsResponse {
   core.component.dex.v1.PositionId position_id = 1;
+  // The subaccount this position belongs to.
+  core.keys.v1.AddressIndex subaccount = 2;
 }
 
 // Requests information on an asset by asset id
@@ -786,4 +789,4 @@ message UnbondingTokensByAddressIndexResponse {
   // `true` if the `unbonding_delay` (from `StakeParameters`) has passed or the
   // validator has unbonded.
   bool claimable = 2;
-}
\ No newline at end of file
+}