diff --git a/pkg/ottl/ottlfuncs/func_useragent.go b/pkg/ottl/ottlfuncs/func_useragent.go
index 0ba1d1d9f346..87b6c8581e22 100644
--- a/pkg/ottl/ottlfuncs/func_useragent.go
+++ b/pkg/ottl/ottlfuncs/func_useragent.go
@@ -38,10 +38,13 @@ func userAgent[K any](userAgentSource ottl.StringGetter[K]) ottl.ExprFunc[K] { /
 			return nil, err
 		}
 		parsedUserAgent := parser.ParseUserAgent(userAgentString)
+		parsedOS := parser.ParseOs(userAgentString)
 		return map[string]any{
 			semconv.AttributeUserAgentName:     parsedUserAgent.Family,
 			semconv.AttributeUserAgentOriginal: userAgentString,
 			semconv.AttributeUserAgentVersion:  parsedUserAgent.ToVersionString(),
+			semconv.AttributeOSName:            parsedOS.Family,
+			semconv.AttributeOSVersion:         parsedOS.ToVersionString(),
 		}, nil
 	}
 }
diff --git a/pkg/ottl/ottlfuncs/func_useragent_test.go b/pkg/ottl/ottlfuncs/func_useragent_test.go
index f5ce22b7a07a..e3b472513ed0 100644
--- a/pkg/ottl/ottlfuncs/func_useragent_test.go
+++ b/pkg/ottl/ottlfuncs/func_useragent_test.go
@@ -19,6 +19,17 @@ func TestUserAgentParser(t *testing.T) {
 		UAString    string
 		ExpectedMap map[string]any
 	}{
+		{
+			Name:     "Firefox-Android",
+			UAString: "Mozilla/5.0 (Linux; Android 4.1.1; SPH-L710 Build/JRO03L) AppleWebKit/535.19 (KHTML, like Gecko) Chrome/18.0.1025.166 Mobile Safari/535.19",
+			ExpectedMap: map[string]any{
+				semconv.AttributeUserAgentOriginal: "Mozilla/5.0 (Linux; Android 4.1.1; SPH-L710 Build/JRO03L) AppleWebKit/535.19 (KHTML, like Gecko) Chrome/18.0.1025.166 Mobile Safari/535.19",
+				semconv.AttributeUserAgentName:     "Chrome Mobile",
+				semconv.AttributeUserAgentVersion:  "18.0.1025",
+				semconv.AttributeOSName:            "Android",
+				semconv.AttributeOSVersion:         "4.1.1",
+			},
+		},
 		{
 			Name:     "Firefox",
 			UAString: "Mozilla/5.0 (X11; Linux x86_64; rv:126.0) Gecko/20100101 Firefox/126.0",
@@ -26,6 +37,8 @@ func TestUserAgentParser(t *testing.T) {
 				semconv.AttributeUserAgentOriginal: "Mozilla/5.0 (X11; Linux x86_64; rv:126.0) Gecko/20100101 Firefox/126.0",
 				semconv.AttributeUserAgentName:     "Firefox",
 				semconv.AttributeUserAgentVersion:  "126.0",
+				semconv.AttributeOSName:            "Linux",
+				semconv.AttributeOSVersion:         "",
 			},
 		},
 		{
@@ -35,6 +48,8 @@ func TestUserAgentParser(t *testing.T) {
 				semconv.AttributeUserAgentOriginal: "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.103 Safari/537.36",
 				semconv.AttributeUserAgentName:     "Chrome",
 				semconv.AttributeUserAgentVersion:  "51.0.2704",
+				semconv.AttributeOSName:            "Linux",
+				semconv.AttributeOSVersion:         "",
 			},
 		},
 		{
@@ -44,6 +59,8 @@ func TestUserAgentParser(t *testing.T) {
 				semconv.AttributeUserAgentOriginal: "Mozilla/5.0 (iPhone; CPU iPhone OS 13_5_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.1.1 Mobile/15E148 Safari/604.1",
 				semconv.AttributeUserAgentName:     "Mobile Safari",
 				semconv.AttributeUserAgentVersion:  "13.1.1",
+				semconv.AttributeOSName:            "iOS",
+				semconv.AttributeOSVersion:         "13.5.1",
 			},
 		},
 		{
@@ -53,6 +70,8 @@ func TestUserAgentParser(t *testing.T) {
 				semconv.AttributeUserAgentOriginal: "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36 Edg/91.0.864.59",
 				semconv.AttributeUserAgentName:     "Edge",
 				semconv.AttributeUserAgentVersion:  "91.0.864",
+				semconv.AttributeOSName:            "Windows",
+				semconv.AttributeOSVersion:         "10",
 			},
 		},
 		{
@@ -62,6 +81,8 @@ func TestUserAgentParser(t *testing.T) {
 				semconv.AttributeUserAgentOriginal: "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.106 Safari/537.36 OPR/38.0.2220.41",
 				semconv.AttributeUserAgentName:     "Opera",
 				semconv.AttributeUserAgentVersion:  "38.0.2220",
+				semconv.AttributeOSName:            "Linux",
+				semconv.AttributeOSVersion:         "",
 			},
 		},
 		{
@@ -71,6 +92,8 @@ func TestUserAgentParser(t *testing.T) {
 				semconv.AttributeUserAgentOriginal: "curl/7.81.0",
 				semconv.AttributeUserAgentName:     "curl",
 				semconv.AttributeUserAgentVersion:  "7.81.0",
+				semconv.AttributeOSName:            "Other",
+				semconv.AttributeOSVersion:         "",
 			},
 		},
 		{
@@ -80,6 +103,8 @@ func TestUserAgentParser(t *testing.T) {
 				semconv.AttributeUserAgentOriginal: "foobar/1.2.3 (foo; bar baz)",
 				semconv.AttributeUserAgentName:     "Other",
 				semconv.AttributeUserAgentVersion:  "",
+				semconv.AttributeOSName:            "Other",
+				semconv.AttributeOSVersion:         "",
 			},
 		},
 		{
@@ -89,6 +114,30 @@ func TestUserAgentParser(t *testing.T) {
 				semconv.AttributeUserAgentOriginal: "OpenTelemetry Collector Contrib/0.106.1 (linux/amd64)",
 				semconv.AttributeUserAgentName:     "Other",
 				semconv.AttributeUserAgentVersion:  "",
+				semconv.AttributeOSName:            "Linux",
+				semconv.AttributeOSVersion:         "",
+			},
+		},
+		{
+			Name:     "ViaFree iOS",
+			UAString: "ViaFree-DK/3.8.3 (com.MTGx.ViaFree.dk; build:7383; iOS 12.1.0) Alamofire/4.7.0",
+			ExpectedMap: map[string]any{
+				semconv.AttributeUserAgentOriginal: "ViaFree-DK/3.8.3 (com.MTGx.ViaFree.dk; build:7383; iOS 12.1.0) Alamofire/4.7.0",
+				semconv.AttributeUserAgentName:     "ViaFree",
+				semconv.AttributeUserAgentVersion:  "3.8.3",
+				semconv.AttributeOSName:            "iOS",
+				semconv.AttributeOSVersion:         "12.1.0",
+			},
+		},
+		{
+			Name:     "Java SDK Linux",
+			UAString: "ibm-cos-sdk-java/2.3.0 Linux/4.9.0-8-amd64 Java_HotSpot(TM)_64-Bit_Server_VM/9.0.4+11/9.0.4'",
+			ExpectedMap: map[string]any{
+				semconv.AttributeUserAgentOriginal: "ibm-cos-sdk-java/2.3.0 Linux/4.9.0-8-amd64 Java_HotSpot(TM)_64-Bit_Server_VM/9.0.4+11/9.0.4'",
+				semconv.AttributeUserAgentName:     "ibm-cos-sdk-java",
+				semconv.AttributeUserAgentVersion:  "2.3.0",
+				semconv.AttributeOSName:            "Linux",
+				semconv.AttributeOSVersion:         "4.9.0",
 			},
 		},
 	}