siebert financial corp shares were up 8 to 390 after the company said it would buy 24 of the outstanding membership interests in tigress financial partners in exchange tigress would receive 24 of the outstanding membership interests in sieberts wps prime services subsidiary and shares of siebert common stock cynthia dibartolo the founder and chief executive of tigress would join sieberts management team at the close of the transaction the transaction has been approved by the boards of both companies and is expected to close by the third quarter of 2021 volume for the stock was 11 million shares at 1240 pm et compared to its 65day average volume 255000 shares the stock hit its 52week high of 1850 on jan 29