In Horizon 2020, the main rules applicable to the ownership of project results can be found in the model grant agreement. According to these rules, project results are owned by the beneficiary which generates them. Your organisation would therefore own the results which it has generated.
However, if two or more beneficiaries jointly generate results and it is not possible to establish the respective contribution of each beneficiary, or to separate the results for the purpose of applying for, obtaining or maintaining their protection, then the results will be held by these beneficiaries under a regime of joint ownership. In this case, the joint owners must agree in writing on the allocation and terms of exercise of their joint ownership, by way of a joint ownership agreement.
If joint owners have not yet concluded a joint ownership agreement, the default joint ownership regime set forth in the grant agreement will apply. According to this default regime, each joint owner may grant non-exclusive licences to third parties to exploit the jointly owned results, without any right to sub-license, as long as the joint owners are given at least 45 days advance notice and a fair and reasonable compensation.
Please note that joint ownership is not compulsory. Indeed, once joint results have been generated, the joint owners can agree in writing to apply another regime than joint ownership, such as for instance the transfer to a single owner and the grant of access rights (e.g. licences) to the others.