The laser powder bed fusion of polymers (PBF-LB/P), offers a high freedom of design and parts with excellent mechanical properties. The process employs polymer microparticles, which are selectively fused by a laser, so that parts are built layer-wise from the powder bed. However, the choice of appropriate plastic feedstock powders is rather scarce. To open up new fields of application for PBF-manufactured parts, either powders based on different types of polymers or functionalized polyamide-based powders are needed. In this contribution, the functionalization of polyamide 11 powders manufactured via precipitation is addressed. The precipitation process, also known as solution-dissolution process, offers the possibility to easily introduce fillers and additives, which are incorporated into the particles during the manufacturing process. The functionalization with thermal stabilizers, nanoparticles and glass fibers is investigated. The produced particles are characterized in regard to their PBF-processability and functionalization, e.g. size and morphology, thermal properties and filler concentration. Furthermore, test specimens are manufactured and analyzed to assess the functionalization, especially concerning discoloration and mechanical properties.