diff --git a/src/main/java/fr/inria/corese/core/next/query/impl/parser/SparqlListenerDispatcher.java b/src/main/java/fr/inria/corese/core/next/query/impl/parser/SparqlListenerDispatcher.java
index 8849fb3fb..b325eeb14 100644
--- a/src/main/java/fr/inria/corese/core/next/query/impl/parser/SparqlListenerDispatcher.java
+++ b/src/main/java/fr/inria/corese/core/next/query/impl/parser/SparqlListenerDispatcher.java
@@ -312,4 +312,14 @@ public void enterDrop(SparqlParser.DropContext ctx) {
     public void exitDrop(SparqlParser.DropContext ctx) {
         for (var d : delegates) d.exitDrop(ctx);
     }
+
+    @Override
+    public void enterAdd(SparqlParser.AddContext ctx) {
+        for (var d : delegates) d.enterAdd(ctx);
+    }
+
+    @Override
+    public void exitAdd(SparqlParser.AddContext ctx) {
+        for (var d : delegates) d.exitAdd(ctx);
+    }
 }
diff --git a/src/main/java/fr/inria/corese/core/next/query/impl/parser/SparqlQueryAnalyzer.java b/src/main/java/fr/inria/corese/core/next/query/impl/parser/SparqlQueryAnalyzer.java
index a4c845f75..99b6a1fff 100644
--- a/src/main/java/fr/inria/corese/core/next/query/impl/parser/SparqlQueryAnalyzer.java
+++ b/src/main/java/fr/inria/corese/core/next/query/impl/parser/SparqlQueryAnalyzer.java
@@ -162,6 +162,7 @@ private QueryAst buildAst(
                     new CreateUpdateAstListener(updateBuilder),
                     new DropUpdateAstListener(updateBuilder),
                     new LoadUpdateAstListener(updateBuilder),
+                    new AddUpdateAstListener(updateBuilder),
                     new BgpAstListener(updateBuilder),
                     new BindAstListener(updateBuilder),
                     new FilterAstListener(updateBuilder),
diff --git a/src/main/java/fr/inria/corese/core/next/query/impl/parser/SparqlUpdateAstBuilder.java b/src/main/java/fr/inria/corese/core/next/query/impl/parser/SparqlUpdateAstBuilder.java
index 4a77a2031..f3476dfa2 100644
--- a/src/main/java/fr/inria/corese/core/next/query/impl/parser/SparqlUpdateAstBuilder.java
+++ b/src/main/java/fr/inria/corese/core/next/query/impl/parser/SparqlUpdateAstBuilder.java
@@ -83,4 +83,11 @@ public CreateRequestAst createToAst(SparqlParser.CreateContext ctx) {
     public void addRequest(UpdateRequestUnitAst ast) {
         this.updateRequestAst.add(ast);
     }
+
+    public AddRequestAst addToAst(SparqlParser.AddContext ctx) {
+        return new AddRequestAst(
+                graphRefFromGraphOrDefault(ctx.graphOrDefault(0)),
+                graphRefFromGraphOrDefault(ctx.graphOrDefault(1)),
+                ctx.SILENT() != null);
+    }
 }
diff --git a/src/main/java/fr/inria/corese/core/next/query/impl/parser/listener/AddUpdateAstListener.java b/src/main/java/fr/inria/corese/core/next/query/impl/parser/listener/AddUpdateAstListener.java
new file mode 100644
index 000000000..1fbe132e9
--- /dev/null
+++ b/src/main/java/fr/inria/corese/core/next/query/impl/parser/listener/AddUpdateAstListener.java
@@ -0,0 +1,20 @@
+package fr.inria.corese.core.next.query.impl.parser.listener;
+
+import fr.inria.corese.core.next.impl.parser.antlr.SparqlParser;
+import fr.inria.corese.core.next.query.impl.parser.SparqlUpdateAstBuilder;
+import fr.inria.corese.core.next.query.impl.sparql.ast.AddRequestAst;
+
+/**
+ * AST feature listener for ADD SPARQL update query.
+ */
+public class AddUpdateAstListener extends AbstractSparqlUpdateAstListener {
+    public AddUpdateAstListener(SparqlUpdateAstBuilder builder) {
+        super(builder);
+    }
+
+    @Override
+    public void enterAdd(SparqlParser.AddContext ctx) {
+        AddRequestAst ast = this.updateBuilder().addToAst(ctx);
+        this.updateBuilder().addRequest(ast);
+    }
+}
diff --git a/src/main/java/fr/inria/corese/core/next/query/impl/sparql/ast/AddRequestAst.java b/src/main/java/fr/inria/corese/core/next/query/impl/sparql/ast/AddRequestAst.java
new file mode 100644
index 000000000..8e794130e
--- /dev/null
+++ b/src/main/java/fr/inria/corese/core/next/query/impl/sparql/ast/AddRequestAst.java
@@ -0,0 +1,27 @@
+package fr.inria.corese.core.next.query.impl.sparql.ast;
+
+import fr.inria.corese.core.next.query.impl.parser.semantic.support.AstVisitor;
+
+/**
+ * Represents the ADD operation as defined in the <a href="https://www.w3.org/TR/2013/REC-sparql11-update-20130321/#add">SPARQL 1.1 recommendation</a>.
+ * @param source source graph ({@code GRAPH <iri>} or {@code DEFAULT})
+ * @param destination destination graph ({@code GRAPH <iri>} or {@code DEFAULT})
+ * @param silent Determine if the resolution of the query must be resolved silently or not.
+ */
+public record AddRequestAst(GraphRefAst source, GraphRefAst destination, boolean silent) implements UpdateRequestUnitAst {
+    /**
+     * Construct an ADD query with the silent flag set to false.
+     * @param source source graph
+     * @param destination destination graph
+     */
+    public AddRequestAst(GraphRefAst source, GraphRefAst destination) {
+        this(source, destination, false);
+    }
+
+    @Override
+    public void accept(AstVisitor visitor) {
+        visitor.visit(this);
+        this.source.accept(visitor);
+        this.destination.accept(visitor);
+    }
+}
diff --git a/src/main/java/fr/inria/corese/core/next/query/impl/sparql/ast/UpdateRequestUnitAst.java b/src/main/java/fr/inria/corese/core/next/query/impl/sparql/ast/UpdateRequestUnitAst.java
index 52dc6ca05..770afd6a7 100644
--- a/src/main/java/fr/inria/corese/core/next/query/impl/sparql/ast/UpdateRequestUnitAst.java
+++ b/src/main/java/fr/inria/corese/core/next/query/impl/sparql/ast/UpdateRequestUnitAst.java
@@ -5,5 +5,5 @@
 /**
  * Root interface for all operations related to the SPARQL Update operations listed in <a href="https://www.w3.org/TR/sparql11-update/">SPARQL 1.1 Update</a>.
  */
-public sealed interface UpdateRequestUnitAst extends VisitableAst permits LoadRequestAst, ClearRequestAst, CreateRequestAst, DropRequestAst {
+public sealed interface UpdateRequestUnitAst extends VisitableAst permits LoadRequestAst, ClearRequestAst, CreateRequestAst, DropRequestAst, AddRequestAst {
 }
diff --git a/src/test/java/fr/inria/corese/core/next/query/impl/parser/AddUpdateAstBuilderTest.java b/src/test/java/fr/inria/corese/core/next/query/impl/parser/AddUpdateAstBuilderTest.java
new file mode 100644
index 000000000..b962c8ebd
--- /dev/null
+++ b/src/test/java/fr/inria/corese/core/next/query/impl/parser/AddUpdateAstBuilderTest.java
@@ -0,0 +1,126 @@
+package fr.inria.corese.core.next.query.impl.parser;
+
+import fr.inria.corese.core.next.query.api.exception.QuerySyntaxException;
+import fr.inria.corese.core.next.query.impl.sparql.ast.AddRequestAst;
+import fr.inria.corese.core.next.query.impl.sparql.ast.QueryAst;
+import fr.inria.corese.core.next.query.impl.sparql.ast.UpdateRequestAst;
+import fr.inria.corese.core.next.query.impl.sparql.ast.UpdateRequestUnitAst;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class AddUpdateAstBuilderTest extends AbstractSparqlParserFeatureTest {
+
+    private UpdateRequestUnitAst parseUnit(String query) {
+        QueryAst ast = newParserDefault().parse(query);
+        UpdateRequestAst update = assertInstanceOf(UpdateRequestAst.class, ast);
+        assertEquals(1, update.operations().size(), "one update operation");
+        return update.operations().getFirst();
+    }
+
+    @Test
+    @DisplayName("ADD GRAPH <s> TO GRAPH <d>: source and destination named graphs, not silent")
+    void addGraphToGraph() {
+        AddRequestAst add = assertInstanceOf(AddRequestAst.class,
+                parseUnit("ADD GRAPH <http://example.org/s> TO GRAPH <http://example.org/d>"));
+        assertFalse(add.silent());
+        assertEquals("<http://example.org/s>", add.source().graph().raw());
+        assertEquals("<http://example.org/d>", add.destination().graph().raw());
+    }
+
+    @Test
+    @DisplayName("ADD accepts the SPARQL shorthand graph IRI form without GRAPH")
+    void addAcceptsGraphIriShorthand() {
+        AddRequestAst add = assertInstanceOf(AddRequestAst.class,
+                parseUnit("ADD <http://example.org/s> TO <http://example.org/d>"));
+        assertEquals("<http://example.org/s>", add.source().graph().raw());
+        assertEquals("<http://example.org/d>", add.destination().graph().raw());
+    }
+
+    @Test
+    @DisplayName("ADD SILENT DEFAULT TO GRAPH <d>: silent, source is DEFAULT")
+    void addSilentDefaultToGraph() {
+        AddRequestAst add = assertInstanceOf(AddRequestAst.class,
+                parseUnit("ADD SILENT DEFAULT TO GRAPH <http://example.org/d>"));
+        assertTrue(add.silent());
+        assertTrue(add.source().defaultGraph());
+        assertEquals("<http://example.org/d>", add.destination().graph().raw());
+    }
+
+    @Test
+    @DisplayName("ADD GRAPH <s> TO DEFAULT: destination is DEFAULT")
+    void addGraphToDefault() {
+        AddRequestAst add = assertInstanceOf(AddRequestAst.class,
+                parseUnit("ADD GRAPH <http://example.org/s> TO DEFAULT"));
+        assertFalse(add.silent());
+        assertEquals("<http://example.org/s>", add.source().graph().raw());
+        assertTrue(add.destination().defaultGraph());
+    }
+
+    @Test
+    @DisplayName("ADD DEFAULT TO DEFAULT: both source and destination are DEFAULT")
+    void addDefaultToDefault() {
+        AddRequestAst add = assertInstanceOf(AddRequestAst.class,
+                parseUnit("ADD DEFAULT TO DEFAULT"));
+        assertFalse(add.silent());
+        assertTrue(add.source().defaultGraph());
+        assertTrue(add.destination().defaultGraph());
+    }
+
+    @Test
+    @DisplayName("ADD SILENT DEFAULT TO DEFAULT: silent with both DEFAULT")
+    void addSilentDefaultToDefault() {
+        AddRequestAst add = assertInstanceOf(AddRequestAst.class,
+                parseUnit("ADD SILENT DEFAULT TO DEFAULT"));
+        assertTrue(add.silent());
+        assertTrue(add.source().defaultGraph());
+        assertTrue(add.destination().defaultGraph());
+    }
+
+    @Test
+    @DisplayName("chained ADD operations separated by ';' produce two update operations")
+    void chainedAddProducesTwoOperations() {
+        QueryAst ast = newParserDefault().parse(
+                "ADD GRAPH <http://example.org/s> TO GRAPH <http://example.org/d> ; " +
+                "ADD SILENT DEFAULT TO GRAPH <http://example.org/d2>");
+        UpdateRequestAst update = assertInstanceOf(UpdateRequestAst.class, ast);
+        assertEquals(2, update.operations().size());
+
+        AddRequestAst first = assertInstanceOf(AddRequestAst.class, update.operations().get(0));
+        assertEquals("<http://example.org/s>", first.source().graph().raw());
+        assertEquals("<http://example.org/d>", first.destination().graph().raw());
+        assertFalse(first.silent());
+
+        AddRequestAst second = assertInstanceOf(AddRequestAst.class, update.operations().get(1));
+        assertTrue(second.source().defaultGraph());
+        assertEquals("<http://example.org/d2>", second.destination().graph().raw());
+        assertTrue(second.silent());
+    }
+
+    @Test
+    @DisplayName("PREFIX declaration is preserved in the prologue of an ADD query")
+    void addMustKeepItsPrologue() {
+        QueryAst ast = newParserDefault().parse(
+                "PREFIX ex: <http://example.org/> ADD GRAPH ex:s TO GRAPH ex:d");
+        UpdateRequestAst update = assertInstanceOf(UpdateRequestAst.class, ast);
+        assertEquals(1, update.operations().size());
+        assertInstanceOf(AddRequestAst.class, update.operations().getFirst());
+        assertNotNull(update.prologue());
+        assertEquals(1, update.prologue().prefixDeclarations().size());
+    }
+
+    @Test
+    @DisplayName("ADD without TO keyword should throw a syntax exception")
+    void addMissingToShouldFail() {
+        assertThrows(QuerySyntaxException.class,
+                () -> newParserDefault().parse("ADD GRAPH <http://example.org/s>"));
+    }
+
+    @Test
+    @DisplayName("ADD without source should throw a syntax exception")
+    void addMissingSourceShouldFail() {
+        assertThrows(QuerySyntaxException.class,
+                () -> newParserDefault().parse("ADD TO GRAPH <http://example.org/d>"));
+    }
+}