diff --git a/modules/permutiveRtdProvider.js b/modules/permutiveRtdProvider.js
index a2cd7847564..c11d1c12436 100644
--- a/modules/permutiveRtdProvider.js
+++ b/modules/permutiveRtdProvider.js
@@ -238,7 +238,8 @@ function getDefaultBidderFn (bidder) {
         deepSetValue(bid, 'params.visitor.p_standard', data.ac)
       }
       if (data.rubicon && data.rubicon.length) {
-        deepSetValue(bid, 'params.visitor.permutive', data.rubicon)
+        const rubiconCohorts = deepAccess(bid, 'params.video') ? data.rubicon.map(String) : data.rubicon
+        deepSetValue(bid, 'params.visitor.permutive', rubiconCohorts)
       }
 
       return bid
diff --git a/modules/permutiveRtdProvider.md b/modules/permutiveRtdProvider.md
index f99389f82cc..7d8f073357c 100644
--- a/modules/permutiveRtdProvider.md
+++ b/modules/permutiveRtdProvider.md
@@ -45,17 +45,52 @@ as well as enabling settings for specific use cases mentioned above (e.g. acbidd
 | params.acBidders       | String[] | An array of bidders which should receive AC cohorts.                                          | `[]`    |
 | params.maxSegs         | Integer  | Maximum number of cohorts to be included in either the `permutive` or `p_standard` key-value. | `500`   |
 | params.transformations | Object[] | An array of configurations for ORTB2 user data transformations                                |         |
+| params.overwrites      | Object   | An object specifying functions for custom targeting logic for bidders.                        | -       |
 
 ##### The `transformations` parameter
 
 This array contains configurations for transformations we'll apply to the Permutive object in the ORTB2 `user.data` array. The results of these transformations will be appended to the `user.data` array that's attached to ORTB2 bid requests.
 
-##### Supported transformations
+###### Supported transformations
 
 | Name           | ID  | Config structure                                  | Description                                                                          |
 |----------------|-----|---------------------------------------------------|--------------------------------------------------------------------------------------|
 | IAB taxonomies | iab | { segtax: number, iabIds: Object<number, number>} | Transform segment IDs from Permutive to IAB (note: alpha version, subject to change) |
 
+##### The `overwrites` parameter
+
+The keys for this object should match a bidder (e.g. `rubicon`), which then can define a function to overwrite the customer targeting logic.
+
+```javascript
+{
+  params: {
+    overwrites: {
+      rubicon: function customTargeting(bid, data, acEnabled, utils, defaultFn) {
+        if (defaultFn) {
+          bid = defaultFn(bid, data, acEnabled)
+        }
+        if (data.gam && data.gam.length) {
+          utils.deepSetValue(bid, 'params.visitor.permutive', data.gam)
+        }
+      } 
+    }
+  }
+}
+```
+
+###### `customTargeting` function parameters
+
+| Name         | Description                                                                    |
+|--------------|--------------------------------------------------------------------------------|
+| `bid`        | The bid request object.                                                        |
+| `data`       | Permutive's targeting data read from localStorage.                             |
+| `acEnabled`  | Boolean stating whether Audience Connect is enabled via `acBidders`.           |
+| `utils`      | An object of helpful utilities. `(deepSetValue, deepAccess, isFn, mergeDeep)`. |
+| `defaultFn`  | The default targeting function.                                                |
+
+
+
+
 #### Context
 
 Permutive is not listed as a TCF vendor as all data collection is on behalf of the publisher and based on consent the publisher has received from the user.
diff --git a/test/spec/modules/permutiveRtdProvider_spec.js b/test/spec/modules/permutiveRtdProvider_spec.js
index 9282ec3ac24..3f104ee1e2e 100644
--- a/test/spec/modules/permutiveRtdProvider_spec.js
+++ b/test/spec/modules/permutiveRtdProvider_spec.js
@@ -13,13 +13,13 @@ import { deepAccess, deepSetValue, mergeDeep } from '../../../src/utils.js'
 import { config } from 'src/config.js'
 
 describe('permutiveRtdProvider', function () {
-  before(function () {
+  beforeEach(function () {
     const data = getTargetingData()
     setLocalStorage(data)
     config.resetConfig()
   })
 
-  after(function () {
+  afterEach(function () {
     const data = getTargetingData()
     removeLocalStorage(data)
     config.resetConfig()
@@ -317,6 +317,7 @@ describe('permutiveRtdProvider', function () {
         })
       }
     })
+
     it('sets segment targeting for Magnite', function () {
       const data = transformedTargeting()
       const adUnits = getAdUnits()
@@ -337,6 +338,38 @@ describe('permutiveRtdProvider', function () {
         })
       }
     })
+
+    it('sets segment targeting for Magnite video', function () {
+      const targetingData = getTargetingData()
+      targetingData._prubicons.push(321)
+
+      setLocalStorage(targetingData)
+
+      const data = transformedTargeting(targetingData)
+      const config = getConfig()
+
+      const adUnits = getAdUnits().filter(adUnit => adUnit.mediaTypes.video)
+      expect(adUnits).to.have.lengthOf(1)
+
+      initSegments({ adUnits }, callback, config)
+
+      function callback() {
+        adUnits.forEach(adUnit => {
+          adUnit.bids.forEach(bid => {
+            const { bidder, params } = bid
+
+            if (bidder === 'rubicon') {
+              expect(
+                deepAccess(params, 'visitor.permutive'),
+                'Should map all targeting values to a string',
+              ).to.eql(data.rubicon.map(String))
+              expect(deepAccess(params, 'visitor.p_standard')).to.eql(data.ac)
+            }
+          })
+        })
+      }
+    })
+
     it('sets segment targeting for Ozone', function () {
       const data = transformedTargeting()
       const adUnits = getAdUnits()
@@ -516,9 +549,7 @@ function getConfig () {
   }
 }
 
-function transformedTargeting () {
-  const data = getTargetingData()
-
+function transformedTargeting (data = getTargetingData()) {
   return {
     ac: [...data._pcrprs, ...data._ppam, ...data._psegs.filter(seg => seg >= 1000000)],
     appnexus: data._papns,
@@ -640,6 +671,34 @@ function getAdUnits () {
           }
         }
       ]
+    },
+    {
+      code: 'myVideoAdUnit',
+      mediaTypes: {
+        video: {
+          context: 'instream',
+          playerSize: [640, 480],
+          mimes: ['video/mp4', 'video/x-ms-wmv'],
+          protocols: [2, 3, 5, 6],
+          api: [2],
+          maxduration: 30,
+          linearity: 1
+        }
+      },
+      bids: [{
+        bidder: 'rubicon',
+        params: {
+          accountId: '9840',
+          siteId: '123564',
+          zoneId: '583584',
+          video: {
+            language: 'en'
+          },
+          visitor: {
+            test_kv: ['true']
+          }
+        }
+      }]
     }
   ]
 }