diff --git a/engines/dfc_provider/app/controllers/dfc_provider/affiliate_sales_data_controller.rb b/engines/dfc_provider/app/controllers/dfc_provider/affiliate_sales_data_controller.rb
new file mode 100644
index 0000000000..bff7447301
--- /dev/null
+++ b/engines/dfc_provider/app/controllers/dfc_provider/affiliate_sales_data_controller.rb
@@ -0,0 +1,29 @@
+# frozen_string_literal: true
+
+module DfcProvider
+  # Aggregates anonymised sales data for a research project.
+  class AffiliateSalesDataController < DfcProvider::ApplicationController
+    rescue_from Date::Error, with: -> { head :bad_request }
+
+    def show
+      person = AffiliateSalesDataBuilder.person(current_user, filter_params)
+
+      render json: DfcIo.export(person)
+    end
+
+    private
+
+    def filter_params
+      {
+        start_date: parse_date(params[:startDate]),
+        end_date: parse_date(params[:endDate]),
+      }
+    end
+
+    def parse_date(string)
+      return if string.blank?
+
+      Date.parse(string)
+    end
+  end
+end
diff --git a/engines/dfc_provider/app/services/affiliate_sales_data_builder.rb b/engines/dfc_provider/app/services/affiliate_sales_data_builder.rb
new file mode 100644
index 0000000000..26d11b3a98
--- /dev/null
+++ b/engines/dfc_provider/app/services/affiliate_sales_data_builder.rb
@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+class AffiliateSalesDataBuilder < DfcBuilder
+  class << self
+    def person(user, filters = {})
+      data = AffiliateSalesQuery.data(user.affiliate_enterprises, **filters)
+      suppliers = data.map do |row|
+        AffiliateSalesDataRowBuilder.new(row).build_supplier
+      end
+
+      DataFoodConsortium::Connector::Person.new(
+        urls.affiliate_sales_data_url,
+        affiliatedOrganizations: suppliers,
+      )
+    end
+  end
+end
diff --git a/engines/dfc_provider/app/services/affiliate_sales_data_row_builder.rb b/engines/dfc_provider/app/services/affiliate_sales_data_row_builder.rb
new file mode 100644
index 0000000000..073097a04f
--- /dev/null
+++ b/engines/dfc_provider/app/services/affiliate_sales_data_row_builder.rb
@@ -0,0 +1,98 @@
+# frozen_string_literal: true
+
+# Represents a single row of the aggregated sales data.
+class AffiliateSalesDataRowBuilder < DfcBuilder
+  attr_reader :item
+
+  def initialize(row)
+    super()
+    @item = AffiliateSalesQuery.label_row(row)
+  end
+
+  def build_supplier
+    DataFoodConsortium::Connector::Enterprise.new(
+      nil,
+      localizations: [build_address(item[:supplier_postcode])],
+      suppliedProducts: [build_product],
+    )
+  end
+
+  def build_distributor
+    DataFoodConsortium::Connector::Enterprise.new(
+      nil,
+      localizations: [build_address(item[:distributor_postcode])],
+    )
+  end
+
+  def build_product
+    DataFoodConsortium::Connector::SuppliedProduct.new(
+      nil,
+      name: item[:product_name],
+      quantity: build_product_quantity,
+    ).tap do |product|
+      product.registerSemanticProperty("dfc-b:concernedBy") {
+        build_order_line
+      }
+    end
+  end
+
+  def build_order_line
+    DataFoodConsortium::Connector::OrderLine.new(
+      nil,
+      quantity: build_line_quantity,
+      price: build_price,
+      order: build_order,
+    )
+  end
+
+  def build_order
+    DataFoodConsortium::Connector::Order.new(
+      nil,
+      saleSession: build_sale_session,
+    )
+  end
+
+  def build_sale_session
+    DataFoodConsortium::Connector::SaleSession.new(
+      nil,
+    ).tap do |session|
+      session.registerSemanticProperty("dfc-b:objectOf") {
+        build_coordination
+      }
+    end
+  end
+
+  def build_coordination
+    DfcProvider::Coordination.new(
+      nil,
+      coordinator: build_distributor,
+    )
+  end
+
+  def build_product_quantity
+    DataFoodConsortium::Connector::QuantitativeValue.new(
+      unit: QuantitativeValueBuilder.unit(item[:unit_type]),
+      value: item[:units]&.to_f,
+    )
+  end
+
+  def build_line_quantity
+    DataFoodConsortium::Connector::QuantitativeValue.new(
+      unit: DfcLoader.connector.MEASURES.PIECE,
+      value: item[:quantity_sold]&.to_f,
+    )
+  end
+
+  def build_price
+    DataFoodConsortium::Connector::QuantitativeValue.new(
+      value: item[:price]&.to_f,
+    )
+  end
+
+  def build_address(postcode)
+    DataFoodConsortium::Connector::Address.new(
+      nil,
+      postalCode: postcode,
+    )
+  end
+end
diff --git a/engines/dfc_provider/app/services/affiliate_sales_query.rb b/engines/dfc_provider/app/services/affiliate_sales_query.rb
new file mode 100644
index 0000000000..3193ed5623
--- /dev/null
+++ b/engines/dfc_provider/app/services/affiliate_sales_query.rb
@@ -0,0 +1,90 @@
+# frozen_string_literal: true
+
+class AffiliateSalesQuery
+  class << self
+    def data(enterprises, start_date: nil, end_date: nil)
+      end_date = end_date&.end_of_day # Include the whole end date.
+
+      Spree::LineItem
+        .joins(tables)
+        .where(
+          spree_orders: {
+            state: "complete", distributor_id: enterprises,
+            completed_at: [start_date..end_date],
+          },
+        )
+        .group(key_fields)
+        .pluck(fields)
+    end
+
+    # Create a hash with labels for an array of data points:
+    #
+    #   { product_name: "Apple", ... }
+    def label_row(row)
+      labels.zip(row).to_h
+    end
+
+    private
+
+    # We want to collect a lot of data from only a few columns.
+    # It's more efficient with `pluck`. But therefore we need well named
+    # tables and columns, especially because we are going to join some tables
+    # twice for different columns. For example the distributer postcode and
+    # the supplier postcode. That's why we need SQL here instead of nice Rails
+    # associations.
+    def tables
+      <<~SQL.squish
+        JOIN spree_variants ON spree_variants.id = spree_line_items.variant_id
+        JOIN spree_products ON spree_products.id = spree_variants.product_id
+        JOIN enterprises AS suppliers ON suppliers.id = spree_variants.supplier_id
+        JOIN spree_addresses AS supplier_addresses ON supplier_addresses.id = suppliers.address_id
+        JOIN spree_orders ON spree_orders.id = spree_line_items.order_id
+        JOIN enterprises AS distributors ON distributors.id = spree_orders.distributor_id
+        JOIN spree_addresses AS distributor_addresses ON distributor_addresses.id = distributors.address_id
+      SQL
+    end
+
+    def fields
+      <<~SQL.squish
+        spree_products.name AS product_name,
+        spree_variants.display_name AS unit_name,
+        spree_products.variant_unit AS unit_type,
+        spree_variants.unit_value AS units,
+        spree_variants.unit_presentation,
+        spree_line_items.price,
+        distributor_addresses.zipcode AS distributor_postcode,
+        supplier_addresses.zipcode AS supplier_postcode,
+
+        SUM(spree_line_items.quantity) AS quantity_sold
+      SQL
+    end
+
+    def key_fields
+      <<~SQL.squish
+        product_name,
+        unit_name,
+        unit_type,
+        units,
+        spree_variants.unit_presentation,
+        spree_line_items.price,
+        distributor_postcode,
+        supplier_postcode
+      SQL
+    end
+
+    # A list of column names as symbols to be used as hash keys.
+    def labels
+      %i[
+        product_name
+        unit_name
+        unit_type
+        units
+        unit_presentation
+        price
+        distributor_postcode
+        supplier_postcode
+        quantity_sold
+      ]
+    end
+  end
+end
diff --git a/engines/dfc_provider/app/services/quantitative_value_builder.rb b/engines/dfc_provider/app/services/quantitative_value_builder.rb
index 6baac1eecf..ecbc0f4c59 100644
--- a/engines/dfc_provider/app/services/quantitative_value_builder.rb
+++ b/engines/dfc_provider/app/services/quantitative_value_builder.rb
@@ -11,13 +11,13 @@
 class QuantitativeValueBuilder < DfcBuilder
   def self.quantity(variant)
     DataFoodConsortium::Connector::QuantitativeValue.new(
-      unit: unit(variant),
+      unit: unit(variant.product.variant_unit),
       value: variant.unit_value,
     )
   end
 
-  def self.unit(variant)
-    case variant.product.variant_unit
+  def self.unit(unit_name)
+    case unit_name
     when "volume"
       DfcLoader.connector.MEASURES.LITRE
     when "weight"
diff --git a/engines/dfc_provider/config/routes.rb b/engines/dfc_provider/config/routes.rb
index 5bde8f23ba..8fc0850729 100644
--- a/engines/dfc_provider/config/routes.rb
+++ b/engines/dfc_provider/config/routes.rb
@@ -12,4 +12,6 @@ DfcProvider::Engine.routes.draw do
     resources :affiliated_by, only: [:create, :destroy], module: 'enterprise_groups'
   end
   resources :persons, only: [:show]
+
+  resource :affiliate_sales_data, only: [:show]
 end
diff --git a/engines/dfc_provider/lib/dfc_provider.rb b/engines/dfc_provider/lib/dfc_provider.rb
index 526cceb9c3..51f3ec2ef4 100644
--- a/engines/dfc_provider/lib/dfc_provider.rb
+++ b/engines/dfc_provider/lib/dfc_provider.rb
@@ -9,6 +9,7 @@ require "dfc_provider/engine"
 # Custom data types
 require "dfc_provider/supplied_product"
 require "dfc_provider/address"
+require "dfc_provider/coordination"
 
 module DfcProvider
   DataFoodConsortium::Connector::Importer.register_type(SuppliedProduct)
diff --git a/engines/dfc_provider/lib/dfc_provider/coordination.rb b/engines/dfc_provider/lib/dfc_provider/coordination.rb
new file mode 100644
index 0000000000..49b16aa97a
--- /dev/null
+++ b/engines/dfc_provider/lib/dfc_provider/coordination.rb
@@ -0,0 +1,28 @@
+# frozen_string_literal: true
+
+if defined? DataFoodConsortium::Connector::Coordination
+  ActiveSupport::Deprecation.warn <<~TEXT
+    DataFoodConsortium::Connector::Coordination is now available.
+    Please replace your own implementation with the official class.
+  TEXT
+end
+
+module DfcProvider
+  class Coordination
+    include VirtualAssembly::Semantizer::SemanticObject
+
+    SEMANTIC_TYPE = "dfc-b:Coordination"
+
+    attr_accessor :coordinator
+
+    def initialize(semantic_id, coordinator: nil)
+      super(semantic_id)
+
+      self.semanticType = SEMANTIC_TYPE
+
+      @coordinator = coordinator
+      registerSemanticProperty("dfc-b:coordinatedBy", &method("coordinator"))
+        .valueSetter = method("coordinator=")
+    end
+  end
+end
diff --git a/engines/dfc_provider/spec/requests/affiliate_sales_data_spec.rb b/engines/dfc_provider/spec/requests/affiliate_sales_data_spec.rb
new file mode 100644
index 0000000000..3199fc4a22
--- /dev/null
+++ b/engines/dfc_provider/spec/requests/affiliate_sales_data_spec.rb
@@ -0,0 +1,61 @@
+# frozen_string_literal: true
+
+require_relative "../swagger_helper"
+
+RSpec.describe "AffiliateSalesData", swagger_doc: "dfc.yaml", rswag_autodoc: true do
+  let(:user) { create(:oidc_user) }
+
+  before { login_as user }
+
+  path "/api/dfc/affiliate_sales_data" do
+    parameter name: :startDate, in: :query, type: :string
+    parameter name: :endDate, in: :query, type: :string
+
+    get "Show sales data of person's affiliate enterprises" do
+      produces "application/json"
+
+      response "200", "successful", feature: :affiliate_sales_data do
+        let(:startDate) { Date.yesterday }
+        let(:endDate) { Time.zone.today }
+
+        before do
+          order = create(:order_with_totals_and_distribution, :completed)
+          ConnectedApps::AffiliateSalesData.new(
+            enterprise: order.distributor
+          ).connect({})
+        end
+
+        context "with date filters" do
+          let(:startDate) { Date.tomorrow }
+          let(:endDate) { Date.tomorrow }
+
+          run_test! do
+            expect(json_response).to include(
+              "@id" => "http://test.host/api/dfc/affiliate_sales_data",
+              "@type" => "dfc-b:Person",
+            )
+
+            expect(json_response["dfc-b:affiliates"]).to eq nil
+          end
+        end
+
+        context "not filtered" do
+          run_test! do
+            expect(json_response).to include(
+              "@id" => "http://test.host/api/dfc/affiliate_sales_data",
+              "@type" => "dfc-b:Person",
+            )
+            expect(json_response["dfc-b:affiliates"]).to be_present
+          end
+        end
+      end
+
+      response "400", "bad request" do
+        let(:startDate) { "yesterday" }
+        let(:endDate) { "tomorrow" }
+
+        run_test!
+      end
+    end
+  end
+end
diff --git a/engines/dfc_provider/spec/services/affiliate_sales_data_builder_spec.rb b/engines/dfc_provider/spec/services/affiliate_sales_data_builder_spec.rb
new file mode 100644
index 0000000000..9673b70045
--- /dev/null
+++ b/engines/dfc_provider/spec/services/affiliate_sales_data_builder_spec.rb
@@ -0,0 +1,80 @@
+# frozen_string_literal: true
+
+require_relative "../spec_helper"
+
+RSpec.describe AffiliateSalesDataBuilder do
+  let(:user) { build(:user) }
+
+  describe ".person" do
+    let(:person) { described_class.person(user) }
+
+    it "returns data as Person" do
+      expect(person).to be_a DataFoodConsortium::Connector::Person
+      expect(person.semanticId).to eq "http://test.host/api/dfc/affiliate_sales_data"
+    end
+
+    describe "with sales data" do
+      before do
+        supplier = create(
+          :supplier_enterprise,
+          owner: user,
+          users: [user],
+          address: create(:address, zipcode: "5555"),
+        )
+        product = create(
+          :product,
+          name: "Pomme",
+          supplier_id: supplier.id,
+          variant_unit: "item",
+        )
+        variant = product.variants.first
+        distributor = create(
+          :distributor_enterprise,
+          owner: user,
+          address: create(:address, zipcode: "6666"),
+        )
+        ConnectedApps::AffiliateSalesData.new(enterprise: distributor).connect({})
+        line_item = build(
+          :line_item,
+          variant:,
+          quantity: 2,
+          price: 3,
+        )
+        order_cycle = create(
+          :order_cycle,
+          suppliers: [supplier],
+          distributors: [distributor],
+        )
+        order_cycle.exchanges.incoming.first.variants << variant
+        order_cycle.exchanges.outgoing.first.variants << variant
+        create(
+          :order,
+          state: "complete",
+          order_cycle:,
+          distributor:,
+          line_items: [line_item],
+        )
+      end
+
+      it "returns required sales data", feature: :affiliate_sales_data do
+        supplier = person.affiliatedOrganizations[0]
+        product = supplier.suppliedProducts[0]
+        line = product.semanticPropertyValue("dfc-b:concernedBy")
+        session = line.order.saleSession
+        coordination = session.semanticPropertyValue("dfc-b:objectOf")
+        distributor = coordination.coordinator
+
+        expect(supplier.localizations[0].postalCode).to eq "5555"
+        expect(distributor.localizations[0].postalCode).to eq "6666"
+
+        expect(product.name).to eq "Pomme"
+        expect(product.quantity.unit).to eq DfcLoader.connector.MEASURES.PIECE
+        expect(product.quantity.value).to eq 1
+
+        expect(line.quantity.unit).to eq DfcLoader.connector.MEASURES.PIECE
+        expect(line.quantity.value).to eq 2
+        expect(line.price.value).to eq 3
+      end
+    end
+  end
+end
diff --git a/engines/dfc_provider/spec/services/affiliate_sales_query_spec.rb b/engines/dfc_provider/spec/services/affiliate_sales_query_spec.rb
new file mode 100644
index 0000000000..f1ab830977
--- /dev/null
+++ b/engines/dfc_provider/spec/services/affiliate_sales_query_spec.rb
@@ -0,0 +1,69 @@
+# frozen_string_literal: true
+
+require_relative "../spec_helper"
+
+RSpec.describe AffiliateSalesQuery do
+  subject(:query) { described_class }
+
+  describe ".data" do
+    let(:order) { create(:order_with_totals_and_distribution, :completed) }
+    let(:today) { Time.zone.today }
+    let(:yesterday) { Time.zone.yesterday }
+    let(:tomorrow) { Time.zone.tomorrow }
+
+    it "returns data" do
+      # Test data creation takes time.
+      # So I'm executing more tests in one `it` block here.
+      # And make it simpler to call the subject many times:
+      count_rows = lambda do |**args|
+        query.data(order.distributor, **args).count
+      end
+
+      # Without any filters:
+      expect(count_rows.call).to eq 1
+
+      # From today:
+      expect(count_rows.call(start_date: today)).to eq 1
+
+      # Until today:
+      expect(count_rows.call(end_date: today)).to eq 1
+
+      # Just today:
+      expect(count_rows.call(start_date: today, end_date: today)).to eq 1
+
+      # Yesterday:
+      expect(count_rows.call(start_date: yesterday, end_date: yesterday)).to eq 0
+
+      # Until yesterday:
+      expect(count_rows.call(end_date: yesterday)).to eq 0
+
+      # From tomorrow:
+      expect(count_rows.call(start_date: tomorrow)).to eq 0
+    end
+  end
+
+  describe ".label_row" do
+    it "converts an array to a hash" do
+      row = [
+        "Apples",
+        "item", "item", nil, nil,
+        15.50,
+        "3210", "3211",
+        3,
+      ]
+      expect(query.label_row(row)).to eq(
+        {
+          product_name: "Apples",
+          unit_name: "item",
+          unit_type: "item",
+          units: nil,
+          unit_presentation: nil,
+          price: 15.50,
+          distributor_postcode: "3210",
+          supplier_postcode: "3211",
+          quantity_sold: 3,
+        }
+      )
+    end
+  end
+end
diff --git a/lib/open_food_network/feature_toggle.rb b/lib/open_food_network/feature_toggle.rb
index aedef176fb..a3b1d8b253 100644
--- a/lib/open_food_network/feature_toggle.rb
+++ b/lib/open_food_network/feature_toggle.rb
@@ -44,6 +44,10 @@ module OpenFoodNetwork
         Enterprise data can be shared with another app.
         The first example is the Australian Discover Regenerative Portal.
       DESC
+      "affiliate_sales_data" => <<~DESC,
+        Activated for a user.
+        The user (INRAE researcher) has access to anonymised sales.
+      DESC
     }.freeze
 
     # Features you would like to be enabled to start with.
diff --git a/swagger/dfc.yaml b/swagger/dfc.yaml
index cc6fa07771..68e1524b1f 100644
--- a/swagger/dfc.yaml
+++ b/swagger/dfc.yaml
@@ -69,6 +69,99 @@ paths:
                     dfc-b:region: Victoria
         '404':
           description: not found
+  "/api/dfc/affiliate_sales_data":
+    parameters:
+    - name: startDate
+      in: query
+      schema:
+        type: string
+    - name: endDate
+      in: query
+      schema:
+        type: string
+    get:
+      summary: Show sales data of person's affiliate enterprises
+      tags:
+      - AffiliateSalesData
+      responses:
+        '200':
+          description: successful
+          content:
+            application/json:
+              examples:
+                test_example:
+                  value:
+                    "@context": https://www.datafoodconsortium.org
+                    "@id": http://test.host/api/dfc/affiliate_sales_data
+                    "@type": dfc-b:Person
+                    dfc-b:logo: ''
+                    dfc-b:firstName: ''
+                    dfc-b:familyName: ''
+                    dfc-b:affiliates:
+                      "@type": dfc-b:Enterprise
+                      dfc-b:hasAddress:
+                        "@type": dfc-b:Address
+                        dfc-b:hasStreet: ''
+                        dfc-b:hasPostalCode: '20170'
+                        dfc-b:hasCity: ''
+                        dfc-b:hasCountry: ''
+                        dfc-b:latitude: 0.0
+                        dfc-b:longitude: 0.0
+                        dfc-b:region: ''
+                      dfc-b:logo: ''
+                      dfc-b:name: ''
+                      dfc-b:hasDescription: ''
+                      dfc-b:VATnumber: ''
+                      dfc-b:supplies:
+                        "@type": dfc-b:SuppliedProduct
+                        dfc-b:name: 'Product #3 - 7198'
+                        dfc-b:description: ''
+                        dfc-b:hasQuantity:
+                          "@type": dfc-b:QuantitativeValue
+                          dfc-b:hasUnit: dfc-m:Gram
+                          dfc-b:value: 1.0
+                        dfc-b:alcoholPercentage: 0.0
+                        dfc-b:lifetime: ''
+                        dfc-b:usageOrStorageCondition: ''
+                        dfc-b:totalTheoreticalStock: 0.0
+                        dfc-b:concernedBy:
+                          "@type": dfc-b:OrderLine
+                          dfc-b:description: ''
+                          dfc-b:quantity:
+                            "@type": dfc-b:QuantitativeValue
+                            dfc-b:hasUnit: dfc-m:Piece
+                            dfc-b:value: 1.0
+                          dfc-b:hasPrice:
+                            "@type": dfc-b:QuantitativeValue
+                            dfc-b:value: 10.0
+                          dfc-b:partOf:
+                            "@type": dfc-b:Order
+                            dfc-b:orderNumber: ''
+                            dfc-b:date: ''
+                            dfc-b:belongsTo:
+                              "@type": dfc-b:SaleSession
+                              dfc-b:beginDate: ''
+                              dfc-b:endDate: ''
+                              dfc-b:quantity: 0.0
+                              dfc-b:objectOf:
+                                "@type": dfc-b:Coordination
+                                dfc-b:coordinatedBy:
+                                  "@type": dfc-b:Enterprise
+                                  dfc-b:hasAddress:
+                                    "@type": dfc-b:Address
+                                    dfc-b:hasStreet: ''
+                                    dfc-b:hasPostalCode: '20170'
+                                    dfc-b:hasCity: ''
+                                    dfc-b:hasCountry: ''
+                                    dfc-b:latitude: 0.0
+                                    dfc-b:longitude: 0.0
+                                    dfc-b:region: ''
+                                  dfc-b:logo: ''
+                                  dfc-b:name: ''
+                                  dfc-b:hasDescription: ''
+                                  dfc-b:VATnumber: ''
+        '400':
+          description: bad request
   "/api/dfc/enterprises/{enterprise_id}/catalog_items":
     parameters:
     - name: enterprise_id