diff --git a/ReactCommon/fabric/core/layout/LayoutMetrics.h b/ReactCommon/fabric/core/layout/LayoutMetrics.h
index 5c915310a..567c9177a 100644
--- a/ReactCommon/fabric/core/layout/LayoutMetrics.h
+++ b/ReactCommon/fabric/core/layout/LayoutMetrics.h
@@ -42,5 +42,10 @@ struct LayoutMetrics {
   }
 };
 
+/*
+ * Represents some undefined, not-yet-computed or meaningless value of `LayoutMetrics` type.
+ */
+static const LayoutMetrics EmptyLayoutMetrics = {.frame = { .size = {-1, -1}}};
+
 } // namespace react
 } // namespace facebook
diff --git a/ReactCommon/fabric/uimanager/ShadowView.cpp b/ReactCommon/fabric/uimanager/ShadowView.cpp
new file mode 100644
index 000000000..0da676a6f
--- /dev/null
+++ b/ReactCommon/fabric/uimanager/ShadowView.cpp
@@ -0,0 +1,46 @@
+// Copyright (c) 2004-present, Facebook, Inc.
+
+// This source code is licensed under the MIT license found in the
+// LICENSE file in the root directory of this source tree.
+
+#include "ShadowView.h"
+
+#include <fabric/core/LayoutableShadowNode.h>
+
+namespace facebook {
+namespace react {
+
+static LayoutMetrics layoutMetricsFromShadowNode(const ShadowNode &shadowNode) {
+  auto layoutableShadowNode = dynamic_cast<const LayoutableShadowNode *>(&shadowNode);
+  return layoutableShadowNode ? layoutableShadowNode->getLayoutMetrics() : EmptyLayoutMetrics;
+}
+
+ShadowView::ShadowView(const ShadowNode &shadowNode):
+  componentName(shadowNode.getComponentName()),
+  componentHandle(shadowNode.getComponentHandle()),
+  tag(shadowNode.getTag()),
+  props(shadowNode.getProps()),
+  eventEmitter(shadowNode.getEventEmitter()),
+  layoutMetrics(layoutMetricsFromShadowNode(shadowNode)),
+  localData(shadowNode.getLocalData()) {}
+
+bool ShadowView::operator==(const ShadowView &rhs) const {
+  return
+    std::tie(this->tag, this->componentName, this->props, this->eventEmitter, this->layoutMetrics, this->localData) ==
+    std::tie(rhs.tag, rhs.componentName, rhs.props, rhs.eventEmitter, rhs.layoutMetrics, rhs.localData);
+}
+
+bool ShadowView::operator!=(const ShadowView &rhs) const {
+  return !(*this == rhs);
+}
+
+bool ShadowViewNodePair::operator==(const ShadowViewNodePair &rhs) const {
+  return &this->shadowNode == &rhs.shadowNode;
+}
+
+bool ShadowViewNodePair::operator!=(const ShadowViewNodePair &rhs) const {
+  return !(*this == rhs);
+}
+
+} // namespace react
+} // namespace facebook
diff --git a/ReactCommon/fabric/uimanager/ShadowView.h b/ReactCommon/fabric/uimanager/ShadowView.h
new file mode 100644
index 000000000..8c737db0e
--- /dev/null
+++ b/ReactCommon/fabric/uimanager/ShadowView.h
@@ -0,0 +1,61 @@
+// Copyright (c) 2004-present, Facebook, Inc.
+
+// This source code is licensed under the MIT license found in the
+// LICENSE file in the root directory of this source tree.
+
+#pragma once
+
+#include <fabric/core/LayoutMetrics.h>
+#include <fabric/core/LocalData.h>
+#include <fabric/core/Props.h>
+#include <fabric/core/ReactPrimitives.h>
+#include <fabric/core/ShadowNode.h>
+#include <fabric/events/EventEmitter.h>
+
+namespace facebook {
+namespace react {
+
+/*
+ * Describes a view that can be mounted.
+ */
+struct ShadowView final {
+  ShadowView() = default;
+  ShadowView(const ShadowView &shadowView) = default;
+
+  /*
+   * Constructs a `ShadowView` from given `ShadowNode`.
+   */
+  explicit ShadowView(const ShadowNode &shadowNode);
+
+  ShadowView &operator=(const ShadowView &other) = default;
+
+  bool operator==(const ShadowView &rhs) const;
+  bool operator!=(const ShadowView &rhs) const;
+
+  ComponentName componentName = "";
+  ComponentHandle componentHandle = 0;
+  Tag tag = -1;
+  SharedProps props = {};
+  SharedEventEmitter eventEmitter = {};
+  LayoutMetrics layoutMetrics = EmptyLayoutMetrics;
+  SharedLocalData localData = {};
+};
+
+/*
+ * Describes pair of a `ShadowView` and a `ShadowNode`.
+ */
+struct ShadowViewNodePair final {
+  const ShadowView shadowView;
+  const ShadowNode &shadowNode;
+
+  /*
+   * The stored pointer to `ShadowNode` represents an indentity of the pair.
+   */
+  bool operator==(const ShadowViewNodePair &rhs) const;
+  bool operator!=(const ShadowViewNodePair &rhs) const;
+};
+
+using ShadowViewNodePairList = std::vector<ShadowViewNodePair>;
+
+} // namespace react
+} // namespace facebook
diff --git a/ReactCommon/fabric/uimanager/ShadowViewMutation.cpp b/ReactCommon/fabric/uimanager/ShadowViewMutation.cpp
new file mode 100644
index 000000000..5dd5f1cac
--- /dev/null
+++ b/ReactCommon/fabric/uimanager/ShadowViewMutation.cpp
@@ -0,0 +1,75 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#include "ShadowViewMutation.h"
+
+namespace facebook {
+namespace react {
+
+ShadowViewMutation ShadowViewMutation::CreateMutation(
+  ShadowView shadowView
+) {
+  return ShadowViewMutation {
+    .type = Create,
+    .newChildShadowView = shadowView,
+    .index = -1
+  };
+}
+
+ShadowViewMutation ShadowViewMutation::DeleteMutation(
+  ShadowView shadowView
+) {
+  return {
+    .type = Delete,
+    .oldChildShadowView = shadowView,
+    .index = -1
+  };
+}
+
+ShadowViewMutation ShadowViewMutation::InsertMutation(
+  ShadowView parentShadowView,
+  ShadowView childShadowView,
+  int index
+) {
+  return {
+    .type = Insert,
+    .parentShadowView = parentShadowView,
+    .newChildShadowView = childShadowView,
+    .index = index
+  };
+}
+
+ShadowViewMutation ShadowViewMutation::RemoveMutation(
+  ShadowView parentShadowView,
+  ShadowView childShadowView,
+  int index
+) {
+  return {
+    .type = Remove,
+    .parentShadowView = parentShadowView,
+    .oldChildShadowView = childShadowView,
+    .index = index
+  };
+}
+
+ShadowViewMutation ShadowViewMutation::UpdateMutation(
+  ShadowView parentShadowView,
+  ShadowView oldChildShadowView,
+  ShadowView newChildShadowView,
+  int index
+) {
+  return {
+    .type = Update,
+    .parentShadowView = parentShadowView,
+    .oldChildShadowView = oldChildShadowView,
+    .newChildShadowView = newChildShadowView,
+    .index = index
+  };
+}
+
+} // namespace react
+} // namespace facebook
diff --git a/ReactCommon/fabric/uimanager/ShadowViewMutation.h b/ReactCommon/fabric/uimanager/ShadowViewMutation.h
new file mode 100644
index 000000000..2ba76d3f7
--- /dev/null
+++ b/ReactCommon/fabric/uimanager/ShadowViewMutation.h
@@ -0,0 +1,91 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#pragma once
+
+#include <vector>
+
+#include <fabric/uimanager/ShadowView.h>
+
+namespace facebook {
+namespace react {
+
+/*
+ * Describes a single native view tree mutation instruction which may contain
+ * pointers to an old shadow view, a new shadow view, a parent shadow view and
+ * final index of inserted or updated view.
+ * Use static methods to instantiate mutations of different types.
+ */
+struct ShadowViewMutation final {
+
+#pragma mark - Designated Initializers
+
+  /*
+   * Creates and returns an `Create` mutation instruction.
+   */
+  static ShadowViewMutation CreateMutation(
+    ShadowView shadowView
+  );
+
+  /*
+   * Creates and returns an `Delete` mutation instruction.
+   */
+  static ShadowViewMutation DeleteMutation(
+    ShadowView shadowView
+  );
+
+  /*
+   * Creates and returns an `Insert` mutation instruction.
+   */
+  static ShadowViewMutation InsertMutation(
+    ShadowView parentShadowView,
+    ShadowView childShadowView,
+    int index
+  );
+
+  /*
+   * Creates and returns a `Remove` mutation instruction.
+   */
+  static ShadowViewMutation RemoveMutation(
+    ShadowView parentShadowView,
+    ShadowView childShadowView,
+    int index
+  );
+  
+  /*
+   * Creates and returns an `Update` mutation instruction.
+   */
+  static ShadowViewMutation UpdateMutation(
+    ShadowView parentShadowView,
+    ShadowView oldChildShadowView,
+    ShadowView newChildShadowView,
+    int index
+  );
+
+#pragma mark - Type
+
+  enum Type {
+    Create,
+    Delete,
+    Insert,
+    Remove,
+    Update
+  };
+
+#pragma mark - Fields
+
+  Type type = {Create};
+  ShadowView parentShadowView = {};
+  ShadowView oldChildShadowView = {};
+  ShadowView newChildShadowView = {};
+  int index = {};
+};
+
+using ShadowViewMutationList = std::vector<ShadowViewMutation>;
+
+} // namespace react
+} // namespace facebook