... I Need Half of Her Organization!!! 

Kristin Cavallari and Jay Cutler appeared to be moving along pleasantly with their separation, however it's slowing down ... what's more, we're advised this is on the grounds that he needs a piece of her organization. 

Sources near the ex-couple tell TMZ ... the explanation it's requiring a significant stretch of time to finish their separation is on the grounds that Jay's looking for 50% responsibility for James, Kristin's stylish gems and clothing line. 

We're revealed to Cutler's demanding he ought to get a stake in UJ on the grounds that Kristin dispatched it while they were hitched ... furthermore, a long time before he sought legal separation in April, 2020. 

Our sources say Kristin doesn't feel she owes him anything from Unprecedented James, be that as it may, in light of the fact that she says Jay didn't place any of his own cash into the organization. She asserts she financed it ... also, is pushing back hard. 

Regardless of whether that is valid, we do realize Cutler was at the kickoff of Cavallari's Chicago area for help ... since it was highlighted on her unscripted TV drama. 

As we've revealed ... after the separation recording a year ago, things got combative among Kristin and Jay for some time, however they apparently worked everything out, consenting to 50/50 guardianship of their 3 children. They even indicated they were drawing near again in January. 

Sure appears as though a portion of that combativeness is back on. We connected with Kristin and Jay's reps for input ... up until this point, no word back.