Jim Simons acquired 623 Thousand Atara Biotherapeutics shares worth $436 Thousand. That's 0.00% of their equity portfolio (2677th largest holding). The first Atara Biotherapeutics trade was made in Q2 2019. Since then Jim Simons bought shares eight more times and sold shares on eight occasions. The investor's estimated purchase price is $3.37 Million, resulting in a loss of 87%.