diff --git a/packages/react-native-renderer/src/ReactFabric.js b/packages/react-native-renderer/src/ReactFabric.js
index 428ffe20acd37..d874742cd4846 100644
--- a/packages/react-native-renderer/src/ReactFabric.js
+++ b/packages/react-native-renderer/src/ReactFabric.js
@@ -8,7 +8,7 @@
  */
 
 import type {HostComponent} from './ReactNativeTypes';
-import type {ReactNodeList} from 'shared/ReactTypes';
+import type {ReactPortal, ReactNodeList} from 'shared/ReactTypes';
 import type {ElementRef, Element, ElementType} from 'react';
 
 import './ReactFabricInjection';
@@ -249,7 +249,7 @@ function createPortal(
   children: ReactNodeList,
   containerTag: number,
   key: ?string = null,
-) {
+): ReactPortal {
   return createPortalImpl(children, containerTag, null, key);
 }
 
diff --git a/packages/react-native-renderer/src/ReactNativeBridgeEventPlugin.js b/packages/react-native-renderer/src/ReactNativeBridgeEventPlugin.js
index f3ce8a49c28f6..ecd531e3cdaf0 100644
--- a/packages/react-native-renderer/src/ReactNativeBridgeEventPlugin.js
+++ b/packages/react-native-renderer/src/ReactNativeBridgeEventPlugin.js
@@ -7,7 +7,10 @@
  * @flow
  */
 
-import type {AnyNativeEvent} from './legacy-events/PluginModuleType';
+import type {
+  AnyNativeEvent,
+  EventTypes,
+} from './legacy-events/PluginModuleType';
 import type {TopLevelType} from './legacy-events/TopLevelEventTypes';
 import SyntheticEvent from './legacy-events/SyntheticEvent';
 import type {PropagationPhases} from './legacy-events/PropagationPhases';
@@ -175,7 +178,7 @@ function accumulateDirectDispatches(events: ?(Array<Object> | Object)) {
 // End of inline
 
 const ReactNativeBridgeEventPlugin = {
-  eventTypes: {},
+  eventTypes: ({}: EventTypes),
 
   extractEvents: function(
     topLevelType: TopLevelType,
diff --git a/packages/react-native-renderer/src/ReactNativeFiberInspector.js b/packages/react-native-renderer/src/ReactNativeFiberInspector.js
index f0c6a8de2f566..874ac91d84734 100644
--- a/packages/react-native-renderer/src/ReactNativeFiberInspector.js
+++ b/packages/react-native-renderer/src/ReactNativeFiberInspector.js
@@ -30,7 +30,9 @@ let createHierarchy;
 let getHostNode;
 let getHostProps;
 let lastNonHostInstance;
-let getInspectorDataForInstance;
+let getInspectorDataForInstance: (
+  closestInstance: Fiber | null,
+) => InspectorData;
 let getOwnerHierarchy;
 let traverseOwnerTreeUp;
 
@@ -142,8 +144,14 @@ if (__DEV__ || enableGetInspectorDataForInstanceInProduction) {
   };
 }
 
-let getInspectorDataForViewTag;
-let getInspectorDataForViewAtPoint;
+let getInspectorDataForViewTag: (viewTag: number) => Object;
+let getInspectorDataForViewAtPoint: (
+  findNodeHandle: (componentOrHandle: any) => ?number,
+  inspectedView: Object,
+  locationX: number,
+  locationY: number,
+  callback: (viewData: TouchedViewDataAtPoint) => mixed,
+) => void;
 
 if (__DEV__) {
   getInspectorDataForViewTag = function(viewTag: number): Object {
diff --git a/packages/react-native-renderer/src/ReactNativeRenderer.js b/packages/react-native-renderer/src/ReactNativeRenderer.js
index 68241f8def7ac..b47baf0c9bb8c 100644
--- a/packages/react-native-renderer/src/ReactNativeRenderer.js
+++ b/packages/react-native-renderer/src/ReactNativeRenderer.js
@@ -8,7 +8,7 @@
  */
 
 import type {HostComponent} from './ReactNativeTypes';
-import type {ReactNodeList} from 'shared/ReactTypes';
+import type {ReactPortal, ReactNodeList} from 'shared/ReactTypes';
 import type {ElementRef, Element, ElementType} from 'react';
 
 import './ReactNativeInjection';
@@ -248,7 +248,7 @@ function createPortal(
   children: ReactNodeList,
   containerTag: number,
   key: ?string = null,
-) {
+): ReactPortal {
   return createPortalImpl(children, containerTag, null, key);
 }
 
diff --git a/packages/react-native-renderer/src/legacy-events/EventPluginRegistry.js b/packages/react-native-renderer/src/legacy-events/EventPluginRegistry.js
index 3737d2c073b61..a1fe155e1eaaa 100644
--- a/packages/react-native-renderer/src/legacy-events/EventPluginRegistry.js
+++ b/packages/react-native-renderer/src/legacy-events/EventPluginRegistry.js
@@ -13,10 +13,10 @@ import type {
   PluginName,
   LegacyPluginModule,
 } from './PluginModuleType';
+import type {TopLevelType} from './TopLevelEventTypes';
 
 type NamesToPlugins = {
   [key: PluginName]: LegacyPluginModule<AnyNativeEvent>,
-  ...,
 };
 type EventPluginOrder = null | Array<PluginName>;
 
@@ -166,22 +166,28 @@ function publishRegistrationName(
 /**
  * Ordered list of injected plugins.
  */
-export const plugins = [];
+export const plugins: Array<LegacyPluginModule<AnyNativeEvent>> = [];
 
 /**
  * Mapping from event name to dispatch config
  */
-export const eventNameDispatchConfigs = {};
+export const eventNameDispatchConfigs: {
+  [eventName: string]: DispatchConfig,
+} = {};
 
 /**
  * Mapping from registration name to plugin module
  */
-export const registrationNameModules = {};
+export const registrationNameModules: {
+  [registrationName: string]: LegacyPluginModule<AnyNativeEvent>,
+} = {};
 
 /**
  * Mapping from registration name to event name
  */
-export const registrationNameDependencies = {};
+export const registrationNameDependencies: {
+  [registrationName: string]: Array<TopLevelType> | void,
+} = {};
 
 /**
  * Mapping from lowercase registration names to the properly cased version,
@@ -189,7 +195,9 @@ export const registrationNameDependencies = {};
  * only in __DEV__.
  * @type {Object}
  */
-export const possibleRegistrationNames = __DEV__ ? {} : (null: any);
+export const possibleRegistrationNames: {
+  [lowerCasedName: string]: string,
+} = __DEV__ ? {} : (null: any);
 // Trust the developer to only use possibleRegistrationNames in __DEV__
 
 /**
diff --git a/packages/react-native-renderer/src/legacy-events/PluginModuleType.js b/packages/react-native-renderer/src/legacy-events/PluginModuleType.js
index 9488629dca6dd..fcd8ea3ebb870 100644
--- a/packages/react-native-renderer/src/legacy-events/PluginModuleType.js
+++ b/packages/react-native-renderer/src/legacy-events/PluginModuleType.js
@@ -14,7 +14,7 @@ import type {
 } from './ReactSyntheticEventType';
 import type {TopLevelType} from './TopLevelEventTypes';
 
-export type EventTypes = {[key: string]: DispatchConfig, ...};
+export type EventTypes = {[key: string]: DispatchConfig};
 
 export type AnyNativeEvent = Event | KeyboardEvent | MouseEvent | TouchEvent;
 
diff --git a/scripts/flow/config/flowconfig b/scripts/flow/config/flowconfig
index adc89ba407667..404ac2d8b315e 100644
--- a/scripts/flow/config/flowconfig
+++ b/scripts/flow/config/flowconfig
@@ -70,7 +70,7 @@ well_formed_exports.includes=<PROJECT_ROOT>/packages/react-fetch
 well_formed_exports.includes=<PROJECT_ROOT>/packages/react-fs
 well_formed_exports.includes=<PROJECT_ROOT>/packages/react-interactions
 well_formed_exports.includes=<PROJECT_ROOT>/packages/react-is
-; well_formed_exports.includes=<PROJECT_ROOT>/packages/react-native-renderer
+well_formed_exports.includes=<PROJECT_ROOT>/packages/react-native-renderer
 well_formed_exports.includes=<PROJECT_ROOT>/packages/react-noop-renderer
 well_formed_exports.includes=<PROJECT_ROOT>/packages/react-pg
 well_formed_exports.includes=<PROJECT_ROOT>/packages/react-reconciler