The Emperor’s Decree: Marcus Aurelius Has Some Thoughts Abou Yesterday, the coalition of activist short sellers who have been nipping at the ankles of medical devices company Penumbra got some help from Marcus Aurelius Value, who did the legwork to connect various individuals involved with Penumbra and Penumbra’s clinical trials to rival thrombectomy device maker ev3, which was fined in 2018 for encouraging off-label use of its Onyx liquid embolization system.