diff --git a/src/core/annotation.js b/src/core/annotation.js
index 985cf1c8a..4d817365d 100644
--- a/src/core/annotation.js
+++ b/src/core/annotation.js
@@ -16,8 +16,8 @@
 
 import {
   AnnotationBorderStyleType, AnnotationFieldFlag, AnnotationFlag,
-  AnnotationType, assert, isString, OPS, stringToBytes, stringToPDFString, Util,
-  warn
+  AnnotationReplyType, AnnotationType, assert, isString, OPS, stringToBytes,
+  stringToPDFString, Util, warn
 } from '../shared/util';
 import { Catalog, FileSpec, ObjectLoader } from './obj';
 import { Dict, isDict, isName, isRef, isStream } from './primitives';
@@ -643,16 +643,61 @@ class MarkupAnnotation extends Annotation {
     super(parameters);
 
     const dict = parameters.dict;
-    if (!dict.has('C')) {
-      // Fall back to the default background color.
-      this.data.color = null;
+
+    if (dict.has('IRT')) {
+      const rawIRT = dict.getRaw('IRT');
+      this.data.inReplyTo = isRef(rawIRT) ? rawIRT.toString() : null;
+
+      const rt = dict.get('RT');
+      this.data.replyType = isName(rt) ? rt.name : AnnotationReplyType.REPLY;
     }
 
-    this.setCreationDate(dict.get('CreationDate'));
-    this.data.creationDate = this.creationDate;
+    if (this.data.replyType === AnnotationReplyType.GROUP) {
+      // Subordinate annotations in a group should inherit
+      // the group attributes from the primary annotation.
+      const parent = dict.get('IRT');
 
-    this.data.hasPopup = dict.has('Popup');
-    this.data.title = stringToPDFString(dict.get('T') || '');
+      this.data.title = stringToPDFString(parent.get('T') || '');
+
+      this.setContents(parent.get('Contents'));
+      this.data.contents = this.contents;
+
+      if (!parent.has('CreationDate')) {
+        this.data.creationDate = null;
+      } else {
+        this.setCreationDate(parent.get('CreationDate'));
+        this.data.creationDate = this.creationDate;
+      }
+
+      if (!parent.has('M')) {
+        this.data.modificationDate = null;
+      } else {
+        this.setModificationDate(parent.get('M'));
+        this.data.modificationDate = this.modificationDate;
+      }
+
+      this.data.hasPopup = parent.has('Popup');
+
+      if (!parent.has('C')) {
+        // Fall back to the default background color.
+        this.data.color = null;
+      } else {
+        this.setColor(parent.getArray('C'));
+        this.data.color = this.color;
+      }
+    } else {
+      this.data.title = stringToPDFString(dict.get('T') || '');
+
+      this.setCreationDate(dict.get('CreationDate'));
+      this.data.creationDate = this.creationDate;
+
+      this.data.hasPopup = dict.has('Popup');
+
+      if (!dict.has('C')) {
+        // Fall back to the default background color.
+        this.data.color = null;
+      }
+    }
   }
 
   /**
@@ -969,6 +1014,7 @@ class TextAnnotation extends MarkupAnnotation {
 
     super(parameters);
 
+    const dict = parameters.dict;
     this.data.annotationType = AnnotationType.TEXT;
 
     if (this.data.hasAppearance) {
@@ -976,10 +1022,17 @@ class TextAnnotation extends MarkupAnnotation {
     } else {
       this.data.rect[1] = this.data.rect[3] - DEFAULT_ICON_SIZE;
       this.data.rect[2] = this.data.rect[0] + DEFAULT_ICON_SIZE;
-      this.data.name = parameters.dict.has('Name') ?
-                       parameters.dict.get('Name').name : 'Note';
+      this.data.name = dict.has('Name') ?
+                       dict.get('Name').name : 'Note';
     }
 
+    if (dict.has('State')) {
+      this.data.state = dict.get('State') || null;
+      this.data.stateModel = dict.get('StateModel') || null;
+    } else {
+      this.data.state = null;
+      this.data.stateModel = null;
+    }
   }
 }
 
@@ -1012,9 +1065,15 @@ class PopupAnnotation extends Annotation {
 
     let parentSubtype = parentItem.get('Subtype');
     this.data.parentType = isName(parentSubtype) ? parentSubtype.name : null;
-    this.data.parentId = dict.getRaw('Parent').toString();
-    this.data.title = stringToPDFString(parentItem.get('T') || '');
-    this.data.contents = stringToPDFString(parentItem.get('Contents') || '');
+    const rawParent = dict.getRaw('Parent');
+    this.data.parentId = isRef(rawParent) ? rawParent.toString() : null;
+
+    const rt = parentItem.get('RT');
+    if (isName(rt, AnnotationReplyType.GROUP)) {
+      // Subordinate annotations in a group should inherit
+      // the group attributes from the primary annotation.
+      parentItem = parentItem.get('IRT');
+    }
 
     if (!parentItem.has('M')) {
       this.data.modificationDate = null;
@@ -1040,6 +1099,9 @@ class PopupAnnotation extends Annotation {
         this.setFlags(parentFlags);
       }
     }
+
+    this.data.title = stringToPDFString(parentItem.get('T') || '');
+    this.data.contents = stringToPDFString(parentItem.get('Contents') || '');
   }
 }
 
diff --git a/src/shared/util.js b/src/shared/util.js
index 35685921f..d83550a35 100644
--- a/src/shared/util.js
+++ b/src/shared/util.js
@@ -86,6 +86,29 @@ const AnnotationType = {
   REDACT: 26,
 };
 
+const AnnotationStateModelType = {
+  MARKED: 'Marked',
+  REVIEW: 'Review',
+};
+
+const AnnotationMarkedState = {
+  MARKED: 'Marked',
+  UNMARKED: 'Unmarked',
+};
+
+const AnnotationReviewState = {
+  ACCEPTED: 'Accepted',
+  REJECTED: 'Rejected',
+  CANCELLED: 'Cancelled',
+  COMPLETED: 'Completed',
+  NONE: 'None',
+};
+
+const AnnotationReplyType = {
+  GROUP: 'Group',
+  REPLY: 'R',
+};
+
 const AnnotationFlag = {
   INVISIBLE: 0x01,
   HIDDEN: 0x02,
@@ -910,6 +933,10 @@ export {
   AnnotationBorderStyleType,
   AnnotationFieldFlag,
   AnnotationFlag,
+  AnnotationMarkedState,
+  AnnotationReplyType,
+  AnnotationReviewState,
+  AnnotationStateModelType,
   AnnotationType,
   FontType,
   ImageKind,
diff --git a/test/unit/annotation_spec.js b/test/unit/annotation_spec.js
index 8c17cf6fd..4b634632c 100644
--- a/test/unit/annotation_spec.js
+++ b/test/unit/annotation_spec.js
@@ -343,6 +343,220 @@ describe('annotation', function() {
 
       expect(markupAnnotation.creationDate).toEqual(null);
     });
+
+    it('should not parse IRT/RT when not defined', function (done) {
+      dict.set('Type', Name.get('Annot'));
+      dict.set('Subtype', Name.get('Text'));
+
+      const xref = new XRefMock([
+        { ref, data: dict, },
+      ]);
+
+      AnnotationFactory.create(xref, ref, pdfManagerMock,
+          idFactoryMock).then(({ data, }) => {
+        expect(data.inReplyTo).toBeUndefined();
+        expect(data.replyType).toBeUndefined();
+        done();
+      }, done.fail);
+    });
+
+    it('should parse IRT and set default RT when not defined.',
+        function (done) {
+      const annotationRef = new Ref(819, 0);
+      const annotationDict = new Dict();
+      annotationDict.set('Type', Name.get('Annot'));
+      annotationDict.set('Subtype', Name.get('Text'));
+
+      const replyRef = new Ref(820, 0);
+      const replyDict = new Dict();
+      replyDict.set('Type', Name.get('Annot'));
+      replyDict.set('Subtype', Name.get('Text'));
+      replyDict.set('IRT', annotationRef);
+
+      const xref = new XRefMock([
+        { ref: annotationRef, data: annotationDict, },
+        { ref: replyRef, data: replyDict, }
+      ]);
+      annotationDict.assignXref(xref);
+      replyDict.assignXref(xref);
+
+      AnnotationFactory.create(xref, replyRef, pdfManagerMock,
+          idFactoryMock).then(({ data, }) => {
+        expect(data.inReplyTo).toEqual(annotationRef.toString());
+        expect(data.replyType).toEqual('R');
+        done();
+      }, done.fail);
+    });
+
+    it('should parse IRT/RT for a group type', function (done) {
+      const annotationRef = new Ref(819, 0);
+      const annotationDict = new Dict();
+      annotationDict.set('Type', Name.get('Annot'));
+      annotationDict.set('Subtype', Name.get('Text'));
+      annotationDict.set('T', 'ParentTitle');
+      annotationDict.set('Contents', 'ParentText');
+      annotationDict.set('CreationDate', 'D:20180423');
+      annotationDict.set('M', 'D:20190423');
+      annotationDict.set('C', [0, 0, 1]);
+
+      const popupRef = new Ref(820, 0);
+      const popupDict = new Dict();
+      popupDict.set('Type', Name.get('Annot'));
+      popupDict.set('Subtype', Name.get('Popup'));
+      popupDict.set('Parent', annotationRef);
+      annotationDict.set('Popup', popupRef);
+
+      const replyRef = new Ref(821, 0);
+      const replyDict = new Dict();
+      replyDict.set('Type', Name.get('Annot'));
+      replyDict.set('Subtype', Name.get('Text'));
+      replyDict.set('IRT', annotationRef);
+      replyDict.set('RT', Name.get('Group'));
+      replyDict.set('T', 'ReplyTitle');
+      replyDict.set('Contents', 'ReplyText');
+      replyDict.set('CreationDate', 'D:20180523');
+      replyDict.set('M', 'D:20190523');
+      replyDict.set('C', [0.4]);
+
+      const xref = new XRefMock([
+        { ref: annotationRef, data: annotationDict, },
+        { ref: popupRef, data: popupDict, },
+        { ref: replyRef, data: replyDict, }
+      ]);
+      annotationDict.assignXref(xref);
+      popupDict.assignXref(xref);
+      replyDict.assignXref(xref);
+
+      AnnotationFactory.create(xref, replyRef, pdfManagerMock,
+          idFactoryMock).then(({ data, }) => {
+        expect(data.inReplyTo).toEqual(annotationRef.toString());
+        expect(data.replyType).toEqual('Group');
+        expect(data.title).toEqual('ParentTitle');
+        expect(data.contents).toEqual('ParentText');
+        expect(data.creationDate).toEqual('D:20180423');
+        expect(data.modificationDate).toEqual('D:20190423');
+        expect(data.color).toEqual(new Uint8ClampedArray([0, 0, 255]));
+        expect(data.hasPopup).toEqual(true);
+        done();
+      }, done.fail);
+    });
+
+    it('should parse IRT/RT for a reply type', function (done) {
+      const annotationRef = new Ref(819, 0);
+      const annotationDict = new Dict();
+      annotationDict.set('Type', Name.get('Annot'));
+      annotationDict.set('Subtype', Name.get('Text'));
+      annotationDict.set('T', 'ParentTitle');
+      annotationDict.set('Contents', 'ParentText');
+      annotationDict.set('CreationDate', 'D:20180423');
+      annotationDict.set('M', 'D:20190423');
+      annotationDict.set('C', [0, 0, 1]);
+
+      const popupRef = new Ref(820, 0);
+      const popupDict = new Dict();
+      popupDict.set('Type', Name.get('Annot'));
+      popupDict.set('Subtype', Name.get('Popup'));
+      popupDict.set('Parent', annotationRef);
+      annotationDict.set('Popup', popupRef);
+
+      const replyRef = new Ref(821, 0);
+      const replyDict = new Dict();
+      replyDict.set('Type', Name.get('Annot'));
+      replyDict.set('Subtype', Name.get('Text'));
+      replyDict.set('IRT', annotationRef);
+      replyDict.set('RT', Name.get('R'));
+      replyDict.set('T', 'ReplyTitle');
+      replyDict.set('Contents', 'ReplyText');
+      replyDict.set('CreationDate', 'D:20180523');
+      replyDict.set('M', 'D:20190523');
+      replyDict.set('C', [0.4]);
+
+      const xref = new XRefMock([
+        { ref: annotationRef, data: annotationDict, },
+        { ref: popupRef, data: popupDict, },
+        { ref: replyRef, data: replyDict, }
+      ]);
+      annotationDict.assignXref(xref);
+      popupDict.assignXref(xref);
+      replyDict.assignXref(xref);
+
+      AnnotationFactory.create(xref, replyRef, pdfManagerMock,
+          idFactoryMock).then(({ data, }) => {
+        expect(data.inReplyTo).toEqual(annotationRef.toString());
+        expect(data.replyType).toEqual('R');
+        expect(data.title).toEqual('ReplyTitle');
+        expect(data.contents).toEqual('ReplyText');
+        expect(data.creationDate).toEqual('D:20180523');
+        expect(data.modificationDate).toEqual('D:20190523');
+        expect(data.color).toEqual(new Uint8ClampedArray([102, 102, 102]));
+        expect(data.hasPopup).toEqual(false);
+        done();
+      }, done.fail);
+    });
+  });
+
+  describe('TextAnnotation', function() {
+    it('should not parse state model and state when not defined',
+        function (done) {
+      const annotationRef = new Ref(819, 0);
+      const annotationDict = new Dict();
+      annotationDict.set('Type', Name.get('Annot'));
+      annotationDict.set('Subtype', Name.get('Text'));
+      annotationDict.set('Contents', 'TestText');
+
+      const replyRef = new Ref(820, 0);
+      const replyDict = new Dict();
+      replyDict.set('Type', Name.get('Annot'));
+      replyDict.set('Subtype', Name.get('Text'));
+      replyDict.set('IRT', annotationRef);
+      replyDict.set('RT', Name.get('R'));
+      replyDict.set('Contents', 'ReplyText');
+
+      const xref = new XRefMock([
+        { ref: annotationRef, data: annotationDict, },
+        { ref: replyRef, data: replyDict, }
+      ]);
+      annotationDict.assignXref(xref);
+      replyDict.assignXref(xref);
+
+      AnnotationFactory.create(xref, replyRef, pdfManagerMock,
+          idFactoryMock).then(({ data, }) => {
+        expect(data.stateModel).toBeNull();
+        expect(data.state).toBeNull();
+        done();
+      }, done.fail);
+    });
+
+    it('should correctly parse state model and state when defined',
+        function (done) {
+      const annotationRef = new Ref(819, 0);
+      const annotationDict = new Dict();
+      annotationDict.set('Type', Name.get('Annot'));
+      annotationDict.set('Subtype', Name.get('Text'));
+
+      const replyRef = new Ref(820, 0);
+      const replyDict = new Dict();
+      replyDict.set('Type', Name.get('Annot'));
+      replyDict.set('Subtype', Name.get('Text'));
+      replyDict.set('IRT', annotationRef);
+      replyDict.set('RT', Name.get('R'));
+      replyDict.set('StateModel', 'Review');
+      replyDict.set('State', 'Rejected');
+
+      const xref = new XRefMock([
+        { ref: annotationRef, data: annotationDict, },
+        { ref: replyRef, data: replyDict, }
+      ]);
+      annotationDict.assignXref(xref);
+      replyDict.assignXref(xref);
+
+      AnnotationFactory.create(xref, replyRef, pdfManagerMock,
+          idFactoryMock).then(({ data, }) => {
+        expect(data.stateModel).toEqual('Review');
+        expect(data.state).toEqual('Rejected');
+        done();
+      }, done.fail);
+    });
   });
 
   describe('LinkAnnotation', function() {
@@ -1540,6 +1754,58 @@ describe('annotation', function() {
         done();
       }, done.fail);
     });
+
+    it('should correctly inherit Contents from group-master annotation ' +
+       'if parent has ReplyType == Group', function (done) {
+      const annotationRef = new Ref(819, 0);
+      const annotationDict = new Dict();
+      annotationDict.set('Type', Name.get('Annot'));
+      annotationDict.set('Subtype', Name.get('Text'));
+      annotationDict.set('T', 'Correct Title');
+      annotationDict.set('Contents', 'Correct Text');
+      annotationDict.set('M', 'D:20190423');
+      annotationDict.set('C', [0, 0, 1]);
+
+      const replyRef = new Ref(820, 0);
+      const replyDict = new Dict();
+      replyDict.set('Type', Name.get('Annot'));
+      replyDict.set('Subtype', Name.get('Text'));
+      replyDict.set('IRT', annotationRef);
+      replyDict.set('RT', Name.get('Group'));
+      replyDict.set('T', 'Reply Title');
+      replyDict.set('Contents', 'Reply Text');
+      replyDict.set('M', 'D:20190523');
+      replyDict.set('C', [0.4]);
+
+      const popupRef = new Ref(821, 0);
+      const popupDict = new Dict();
+      popupDict.set('Type', Name.get('Annot'));
+      popupDict.set('Subtype', Name.get('Popup'));
+      popupDict.set('T', 'Wrong Title');
+      popupDict.set('Contents', 'Wrong Text');
+      popupDict.set('Parent', replyRef);
+      popupDict.set('M', 'D:20190623');
+      popupDict.set('C', [0.8]);
+      replyDict.set('Popup', popupRef);
+
+      const xref = new XRefMock([
+        { ref: annotationRef, data: annotationDict, },
+        { ref: replyRef, data: replyDict, },
+        { ref: popupRef, data: popupDict, }
+      ]);
+      annotationDict.assignXref(xref);
+      popupDict.assignXref(xref);
+      replyDict.assignXref(xref);
+
+      AnnotationFactory.create(xref, popupRef, pdfManagerMock,
+          idFactoryMock).then(({ data, }) => {
+        expect(data.title).toEqual('Correct Title');
+        expect(data.contents).toEqual('Correct Text');
+        expect(data.modificationDate).toEqual('D:20190423');
+        expect(data.color).toEqual(new Uint8ClampedArray([0, 0, 255]));
+        done();
+      }, done.fail);
+    });
   });
 
   describe('InkAnnotation', function() {