diff --git a/plugins/inputs/whois/README.md b/plugins/inputs/whois/README.md
index befdc1548a122..5b852ab3d681e 100644
--- a/plugins/inputs/whois/README.md
+++ b/plugins/inputs/whois/README.md
@@ -42,13 +42,14 @@ See the [CONFIGURATION.md][CONFIGURATION.md] for more details.
     - expiry (int, seconds) - Time when the domain will expire, in seconds
       since the Unix epoch. `SELECT (expiry / 60 / 60 / 24) as "expiry_in_days"`
     - registrar (string)
+    - registrant (string)
     - status (int, 0 = error, 1 = ok) - WHOIS scraping or parser status
     - updated_timestamp (int, seconds)
 
 ## Example Output
 
 ```text
-whois,domain=example.com creation_timestamp=808372800i,dnssec_enabled=1i,domain_status="LOCKED",expiration_timestamp=1755057600i,expiry=15655393i,name_servers="a.iana-servers.net,b.iana-servers.net",registrar="RESERVED-Internet Assigned Numbers Authority",status=1i,updated_timestamp=1723618894i 1739402208000000000
-whois,domain=influxdata.com creation_timestamp=1403603283i,dnssec_enabled=0i,domain_status="LOCKED",expiration_timestamp=1750758483i,expiry=11356276i,name_servers="ns-1200.awsdns-22.org,ns-127.awsdns-15.com,ns-2037.awsdns-62.co.uk,ns-820.awsdns-38.net",registrar="NameCheap, Inc.",status=1i,updated_timestamp=1716620263i 1739402215000000000
-whois,domain=influxdata1245.com,domain_status=UNKNOWN status=0i 1739402216000000000
+whois,domain=example.com creation_timestamp=808372800i,dnssec_enabled=1i,domain_status="LOCKED",expiration_timestamp=1755057600i,expiry=15600773i,name_servers="a.iana-servers.net,b.iana-servers.net",registrant="",registrar="RESERVED-Internet Assigned Numbers Authority",status=1i,updated_timestamp=1723618894i 1739456828000000000
+whois,domain=influxdata.com creation_timestamp=1403603283i,dnssec_enabled=0i,domain_status="LOCKED",expiration_timestamp=1750758483i,expiry=11301656i,name_servers="ns-1200.awsdns-22.org,ns-127.awsdns-15.com,ns-2037.awsdns-62.co.uk,ns-820.awsdns-38.net",registrant="Redacted for Privacy",registrar="NameCheap, Inc.",status=1i,updated_timestamp=1716620263i 1739456829000000000
+whois,domain=influxdata1245.com,domain_status=UNKNOWN status=0i 1739456829000000000
 ```
diff --git a/plugins/inputs/whois/whois.go b/plugins/inputs/whois/whois.go
index 793661e663a5b..9a76a1c64a8a4 100644
--- a/plugins/inputs/whois/whois.go
+++ b/plugins/inputs/whois/whois.go
@@ -127,6 +127,12 @@ func (w *Whois) Gather(acc telegraf.Accumulator) error {
 			registrar = parsedWhois.Registrar.Name
 		}
 
+		// Extract registrant name (handle nil)
+		registrant := ""
+		if parsedWhois.Registrant != nil {
+			registrant = parsedWhois.Registrant.Name
+		}
+
 		// Extract status (handle nil)
 		domainStatus := "UNKNOWN"
 		if parsedWhois.Domain.Status != nil {
@@ -144,6 +150,7 @@ func (w *Whois) Gather(acc telegraf.Accumulator) error {
 			"expiry":               expiry,
 			"updated_timestamp":    updated.Unix(),
 			"registrar":            registrar,
+			"registrant":           registrant,
 			"domain_status":        domainStatus,
 			"status":               1,
 			"name_servers":         strings.Join(nameServers, ","),