Jim Simons acquired 37.1 Thousand Middlefield Banc shares worth $1.14 Million. That's 0.00% of their equity portfolio (2207th largest holding). The first Middlefield Banc trade was made in Q1 2018. Since then Jim Simons bought shares twelve more times and sold shares on sixteen occasions. The stake costed the investor $856 Thousand, netting the investor a gain of 34% so far.