X0206 3 2017-06-23 0 0001325670 Southern National Bancorp of Virginia Inc SONA 0001459707 CASTLE CREEK CAPITAL PARTNERS IV, LP C/O CASTLE CREEK CAPITAL LLC 6051 EL TORDO, PO BOX 1329 RANCHO SANTA FE CA 92067 0 0 1 0 0001569797 Castle Creek Capital IV LLC C/O CASTLE CREEK CAPITAL LLC 6051 EL TORDO, PO BOX 1329 RANCHO SANTA FE CA 92067 0 0 1 0 0001197257 EGGEMEYER JOHN M III C/O CASTLE CREEK CAPITAL LLC 6051 EL TORDO, PO BOX 1329 RANCHO SANTA FE CA 92067 0 0 1 0 0001242722 THOMAS J MIKESELL C/O CASTLE CREEK CAPITAL LLC 6051 EL TORDO, PO BOX 1329 RANCHO SANTA FE CA 92067 0 0 1 0 0001332829 MERLO MARK G C/O CASTLE CREEK CAPITAL LLC 6051 EL TORDO, PO BOX 1329 RANCHO SANTA FE CA 92067 0 0 1 0 0001481798 Pietrzak John C/O CASTLE CREEK CAPITAL LLC 6051 EL TORDO, PO BOX 1329 RANCHO SANTA FE CA 92067 0 0 1 0 Southern National Bancorp of Virginia Common Stock 3225876 D These securities are directly held by Castle Creek Capital Partners IV, LP ("Fund IV"). Mr. Eggemeyer, Mr. Thomas, Mr. Merlo, and Mr. Pietrzak are managing principals of Castle Creek Capital IV LLC, the sole general partner of Fund IV. Castle Creek Capital IV LLC, Mr. Eggemeyer, Mr. Thomas, Mr. Merlo, and Mr. Pietrzak each disclaim beneficial ownership of such shares of Common Stock, except to the extent of their respective pecuniary interest therein, and this report shall not be deemed an admission that Castle Creek Capital IV LLC, Mr. Eggemeyer, Mr. Thomas, Mr. Merlo, or Mr. Pietrzak is the beneficial owner of such shares of Common Stock for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose. CASTLE CREEK CAPITAL PARTNERS IV, LP, By: /s/ John M. Eggemeyer, Name: John M. Eggemeyer, Title: President 2017-06-26 CASTLE CREEK CAPITAL IV LLC, By: /s/ John M. Eggemeyer, Name: John M. Eggemeyer, Title: President 2017-06-26 JOHN M. EGGEMEYER, By: /s/ John M. Eggemeyer, Name: John M. Eggemeyer 2017-06-26 J. MIKESELL THOMAS, By: /s/ J. Mikesell Thomas, Name: J. Mikesell Thomas 2017-06-26 MARK G. MERLO, By: /s/ Mark G. Merlo, Name: Mark G. Merlo 2017-06-26 JOHN T. PIETRZAK, By: /s/ John T. Pietrzak, Name: John T. Pietrzak 2017-06-26