Rusty Williams, Walking Fish CEO

Five Prime founder Rusty Williams sets out to test the lim­its of cell ther­a­py with ax­olotl-in­spired biotech

Eigh­teen years af­ter launch­ing Five Prime Ther­a­peu­tics, se­r­i­al en­tre­pre­neur Lewis “Rusty” Williams was itch­ing to start some­thing new again. So he as­sem­bled the “best of the best” of his old col­leagues at a bar and grill near Five Prime’s head­quar­ters and got to work on bio­phar­ma’s lat­est puz­zle: us­ing B cells to break the bound­aries of cell ther­a­py.

A cou­ple years lat­er, the group has up­grad­ed their cor­ner ta­ble to of­fice space in the Bay Area — and on Mon­day, the com­pa­ny they found­ed, Walk­ing Fish, un­veiled a $50 mil­lion Se­ries A round to fund a push to­ward the clin­ic.

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