 WeissLaw LLP is investigating possible breaches of fiduciary duty and other violations of law by the board of directors of Principia Biopharma Inc. PRNB or the Company NASDAQ: PRNB in connection with the proposed acquisition of the Company by French pharmaceutical company, Sanofi. Under the terms of the acquisition agreement, which is structured like a tender offer, PRNB shareholders will receive 100.00 in cash for each share of PRNB common stock that they own. 