RBB Bancorp RBB Institutional Ownership

Updated Oct 11, 2026

RBB Bancorp (NASDAQ:RBB) was held by 142 institutional investors that filed 13F reports for the quarter ended June 30, 2026.

• Collectively, these holders controlled 57.10% of RBB Bancorp's outstanding shares in Q2 2026, up from 54.97% in Q1 2026.
• Total holdings of RBB Bancorp shares rose 3.49% from Q1 2026, and the number of holders rose 56.04% from Q2 2025.
• Of the 142 holders, 99 added to their positions, 21 reduced their stakes and 22 left their positions unchanged in Q2 2026.
• Combined, institutional investors held 9.71Mn shares of RBB as of Q2 2026, up 328.04K from the prior quarter and up 1.36Mn from a year earlier.
• BlackRock, Inc. was the top holder of RBB Bancorp as of June 30, 2026, with 1.29Mn shares, or 7.60% of shares outstanding.
• Holders that added the most shares of RBB Bancorp in Q2 2026 were Acadian Asset Management LLC (+302.87K shares), BlackRock, Inc. (+150.79K shares), Qube Research & Technologies Ltd (+136.61K shares), Hillsdale Investment Management Inc. (+105.77K shares) and Los Angeles Capital Management LLC (+76.88K shares).
• The largest position reductions in RBB for Q2 2026 were by AllianceBernstein L.P. (-239.43K shares), Rhino Investment Partners, Inc (-160.42K shares), Vanguard Capital Management LLC (-18.72K shares), Invesco Ltd. (-8.39K shares) and SEI Investments Co (-5.63K shares).
• According to Business Quant data, the leading holders of RBB for Q2 2026 were BlackRock, Inc. (1.29Mn shares), Dimensional Fund Advisors LP (902.29K shares), Vanguard Capital Management LLC (641.3K shares), American Century Companies Inc (536.44K shares), Acadian Asset Management LLC (400.45K shares), Geode Capital Management, LLC (370.55K shares), State Street Corp (337.62K shares), Hillsdale Investment Management Inc. (327.17K shares), Arrowstreet Capital, Limited Partnership (223.88K shares) and Morgan Stanley (206.55K shares).