Costco’s Cookie Policy provides more detail about how we use cookies and similar technologies to collect information when you visit our website and the choices you have regarding the use of cookies. Listed below are the cookies and similar tracking technologies we deploy on Costco.co.uk. For more information on how we collect and process personal data about you, please see our Privacy Policy.
| Analytics | |||||
| Cookie Name | Provider | Domain | Purpose | Data Gathered | Retention |
| IDE | Doubleclick | .doubleclick.net | Analytics | N/A | 2 hours |
| _dc_gtm_<ID> | Google Analytics | www.costco.co.uk | N/A | N/A | N/A |
| _ga | Google Analytics | .costco.co.uk | Used to distinguish users - services.costco.co.uk & costco.is | Clicks and page views | 2 years |
| _gat | Google Analytics | .costco.co.uk | Used to distinguish users - services.costco.co.uk | Clicks and page views | 1 minute |
| _gat_gtag_UA_<CAMPAIGN_ID>_<CAMPAIGN_VER> | Google Analytics | .costco.co.uk | Contains campaign related information for the user - warehouses.costco.co.uk & services.costco.co.uk | Clicks and page views | 90 days |
| _gcl_au | Google Analytics | .costco.co.uk | Used by Google AdSense for experimenting with advertisement efficiency across websites using their services | N/A | 75 days (End of year?) |
| _gid | Google Analytics | .costco.co.uk | Used to throttle request rate - services.costco.co.uk | Clicks and page views | 24 hours |
| utm_campaign | Google Analytics | www.costco.co.uk | N/A | N/A | 24 hours |
| utm_content | Google Analytics | www.costco.co.uk | N/A | N/A | 24 hours |
| utm_medium | Google Analytics | www.costco.co.uk | N/A | N/A | 24 hours |
| utm_source | Google Analytics | www.costco.co.uk | N/A | N/A | 24 hours |
| utm_term | Google Analytics | www.costco.co.uk | N/A | N/A | 24 hours |
| Functional | |||||
| Cookie Name | Provider | Domain | Purpose | Data Gathered | Retention |
| BVID | Bazaarvoice | .network-eu.bazaarvoice.com | This cookie allows internal Bazaarvoice web analytics to be correlated to the same user for interactions across the Bazaarvoice network. | N/A | 1 year |
| BVSID | Bazaarvoice | .network-eu.bazaarvoice.com | This cookie allows internal Bazaarvoice web analytics to be correlated to the same user browsing session for interactions across the Bazaarvoice network. | N/A | 2 hours |
| BVImplMain_site | Bazaarvoice | www.costco.co.uk | N/A | Session | |
| BVBrandID | Bazaarvoice | .costco.co.uk | This cookie allows internal Bazaarvoice web analytics to be correlated to the same user for interactions within a particular client domain. | N/A | 1 year |
| BVBrandSID | Bazaarvoice | .costco.co.uk | This cookie allows internal Bazaarvoice web analytics to be correlated to the same user for interactions within a particular client domain. | N/A | 30 days from set/update |
| _fbp | .costco.co.uk | Used by Facebook to deliver a series of advertisement products such as real time bidding from third party advertisers | N/A | 90 days | |
| <BLANK> | facebook.com | N/A | N/A | End of browser session | |
| fr | facebook.com | Facebook tracks opted-out Facebook users with a cookie (fr) that is used for advertising purposes | N/A | 90 days | |
| Operational | |||||
| Cookie Name | Provider | Domain | Purpose | Data Gathered | Retention |
| ak_bmsc | Akamai | .costco.co.uk | N/A | N/A | 2 hours |
| bm_mi | Akamai | .costco.co.uk | N/A | N/A | 2 hours |
| bm_sv | Akamai | .costco.co.uk | N/A | N/A | 2 hours |
| GCLB | Google Cloud | www.costco.co.uk | This cookie contains the specific Google Cloud Load Balancer the browser has been routed to for the current domain/session | N/A | End of browser session |
| CSRFToken | Hybris | www.costco.co.uk | This cookie enables the application to validate the request is coming for the proper user. | N/A | Session |
| JSESSIONID | Hybris | www.costco.co.uk | Session tracking cookie for membership sign up on costco.is and co.uk | Items in cart | End of browser session |
| RouteID | Hybris | www.costco.co.uk | This cookie enables the routing the request routing to the appropriate server for the session. | N/A | End of browser session |
| SF_SESSION_ID | Hybris | www.costco.co.uk | Storefront session id, used to track user operations | Clicks and page views | End of browser session |
| UserPreferences | Hybris | www.costco.co.uk | This cookie saves user preferences on the website. | Clicks and page views | 30 days from set/update |
| Performance | |||||
| Cookie Name | Provider | Domain | Purpose | Data Gathered | Retention |
| __CT_DATA | Clicktale | .costco.co.uk | N/A | N/A | 1 year |
| _cs_c | Clicktale | .costco.co.uk | N/A | N/A | 1 year |
| _cs_id | Clicktale | .costco.co.uk | N/A | N/A | 1 year |
| _cs_s | Clicktale | .costco.co.uk | N/A | N/A | 30 mins from set/update |
| _CT_RS_ | Clicktale | www.costco.co.uk | N/A | N/A | 2 hours |
| ctm | Clicktale | .costco.co.uk | This cookie contains a unique ID that references the current session on the website. This is the same cookie, with the same function, as ASP.NET_SessionId, that has been renamed. | N/A | 1 year |
| WRIgnore | Clicktale | .costco.co.uk | N/A | N/A | 24 hours |
| WRUID | Clicktale | .costco.co.uk | N/A | N/A | 1 year |
| sc.InTg | Session Cam | www.costco.co.uk | N/A | N/A | Session |
| sc.Status | Session Cam | www.costco.co.uk | This cookie is set by SessionCam to store information regarding mouse behavior while on the site, as well as interactions with any forms that may be available. This information is then used for statistical reporting to improve the website. | N/A | End of browser session |
| sc.ASPNET_SESSIONID | Session Cam | www.costco.co.uk | N/A | N/A | End of browser session |
| Third Party | |||||
| Cookie Name | Provider | Domain | Purpose | Data Gathered | Retention |
| TLTSID | Alamo | assests.alamo.com | Used for TeaLeaf analytics - alamo.com | Clicks and page views | End of browser session |
| TLTUID | Alamo | assests.alamo.com | Used for TeaLeaf analytics - alamo.com | Clicks and page views | 600 days |
| Rental-alamo_com | Alamo | assests.alamo.com | Load balancer cookies for routing user requests | N/A | End of browser session |
| _ga | Costco Compare | .costcocompare.co.uk | N/A | N/A | 2 years |
| _gat | Costco Compare | .costcocompare.co.uk | N/A< | N/A | 1 minute |
| _gid | Costco Compare | .costcocompare.co.uk | N/A | N/A | 24 hours |
| _hjid | Costco Compare | www.costcocompare.co.uk | N/A | N/A | 1 year |
| _hjIncludedInSample | Costco Compare | www.costcocompare.co.uk | N/A | N/A | Session |
| hasZDEDebuggerPresent_js | Costco Services | services.costco.co.uk | This cookie is essential to track and debug error conditions within the website. | Error tracking | End of browser session |
| PHPSESSID | Costco Services | services.costco.co.uk | Session tracking cookie for cake / deli orders | Order | End of browser session |
| _ga | Costco Travel | .costcotravel.co.uk | Used for google analytics - costcotravel.co.uk | Clicks and page views | 2 years |
| _gat | Costco Travel | .costcotravel.co.uk | Used for google analytics - costcotravel.co.uk | Clicks and page views | 1 minute |
| _gid | Costco Travel | .costcotravel.co.uk | Used to throttle request rate - costcotravel.co.uk | Clicks and page views | 24 hours |
| BIGipServerpool-prod-<application> | Costco Travel | .costcotravel.co.uk | Akamai cookie | N/A | End of browser session |
| closedBanner | Costco Travel | www.costcotravel.co.uk | N/A | N/A | 360 days |
| complianceCookie | Costco Travel | www.costcotravel.co.uk | N/A | N/A | 360 days |
| Csrf-Token | Costco Travel | .costcotravel.co.uk | Session tracking cookie to set action call header | Csrf-token | End of browser session |
| JSESSIONID | Costco Travel | .costcotravel.co.uk | Session tracking cookie for member browse costcotravel.co.uk | car selected for booking | End of browser session |
| __utma | Costco Warehouses | warehouses.costco.co.uk | Used to distinguish users and sessions - on warehouses.costco.co.uk | Clicks and page views | 2 years from set/update |
| __utmb | Costco Warehouses | warehouses.costco.co.uk | Used to determine new sessions/visits. - on warehouses.costco.co.uk | Clicks and page views | 30 mins from set/update |
| __utmc | Costco Warehouses | warehouses.costco.co.uk | operated in conjunction with the __utmb cookie to determine whether the user was in a new session/visit - on warehouses.costco.co.uk | Clicks and page views | End of browser session |
| __utmt | Costco Warehouses | warehouses.costco.co.uk | Used to throttle request rate - on warehouses.costco.co.uk | Clicks and page views | 10 minutes |
| __utmv | Costco Warehouses | warehouses.costco.co.uk | Used to store visitor-level custom variable data - on warehouses.costco.co.uk | Clicks and page views | 2 years from set/update |
| __utmz | Costco Warehouses | warehouses.costco.co.uk | Stores the traffic source or campaign that explains how the user reached your site - on warehouses.costco.co.uk | Clicks and page views | 6 months from set/update |
| TLTSID | Enterprise | assests.enterprise.com | Used for TeaLeaf analytics - enterprise.com | Clicks and page views | End of browser session |
| TLTUID | Enterprise | assests.enterprise.com | Used for TeaLeaf analytics - enterprise.com | Clicks and page views | 600 days |
| Rental-c_enterprise_com | Enterprise | assests.enterprise.com | Load balancer cookies for routing user requests | N/A | End of browser session |