RBB Bancorp (RBB) Ownership
RBB ownership summary
as of October 18, 2026- Institutions
- 60.4% of shares outstanding
- Insiders
- 6.37% of shares outstanding
- Shares outstanding
- 16.9M
- Float
- 15.8M shares available to trade
- Short interest
- 3.35% 530K shares short
- Days to cover
- 5.43 short interest down 10.0% vs prior month
- Institutions 60.37%
- Insiders 6.37%
- Other investors 33.27%
RBB top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 7.64% | 1.3M | $33.3M | +150,787 (+13.2%) | June 30, 2026 |
| 2 | Dimensional Fund Advisors, Inc. | 5.33% | 902K | $23.2M | +72,076 (+8.7%) | June 30, 2026 |
| 3 | Vanguard Capital Management, LLC | 3.79% | 641K | $16.5M | −18,721 (−2.8%) | June 30, 2026 |
| 4 | American Century Companies Inc | 3.17% | 536K | $13.8M | +68,758 (+14.7%) | June 30, 2026 |
| 5 | Acadian Asset Management LLC | 2.37% | 400K | $10.3M | +302,866 (+310.4%) | June 30, 2026 |
| 6 | Geode Capital Management, LLC | 2.19% | 371K | $9.5M | +23,223 (+6.7%) | June 30, 2026 |
| 7 | State Street Corp | 2.00% | 338K | $8.7M | +12,799 (+3.9%) | June 30, 2026 |
| 8 | Hillsdale Investment Management Inc. | 1.93% | 327K | $8.4M | +105,769 (+47.8%) | June 30, 2026 |
| 9 | Arrowstreet Capital Limited Partnership | 1.32% | 224K | $5.8M | +24,142 (+12.1%) | June 30, 2026 |
| 10 | Morgan Stanley - Brokerage Accounts | 1.22% | 207K | $5.3M | +73,971 (+55.8%) | June 30, 2026 |
| 11 | Qube Research & Technologies | 1.16% | 196K | $5.0M | +136,611 (+231.7%) | June 30, 2026 |
| 12 | LSV Asset Management | 1.13% | 191K | $4.9M | +2,200 (+1.2%) | June 30, 2026 |
| 13 | Hotchkis & Wiley Capital Management LLC | 1.09% | 185K | $4.8M | +1,080 (+0.6%) | June 30, 2026 |
| 14 | Rhino Investment Partners, Inc. | 1.05% | 178K | $4.6M | −160,422 (−47.3%) | June 30, 2026 |
| 15 | Bridgeway Capital Management, LLC | 1.02% | 173K | $4.4M | +6,732 (+4.1%) | June 30, 2026 |
| 16 | Algert Global LLC | 0.92% | 156K | $4.0M | +156,224 (0.0%) | June 30, 2026 |
| 17 | AllianceBernstein L.P. | 0.84% | 143K | $3.7M | −239,434 (−62.6%) | June 30, 2026 |
| 18 | Vanguard Portfolio Management, LLC | 0.81% | 136K | $3.5M | +15,311 (+12.7%) | June 30, 2026 |
| 19 | Northern Trust Corp | 0.74% | 126K | $3.2M | +9,404 (+8.1%) | June 30, 2026 |
| 20 | Two Sigma Investments LLC | 0.70% | 118K | $3.0M | +57,535 (+95.4%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 17 holders added 1.2M shares and 3 cut 419K.
RBB top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Avantis US Small Cap Value ETF | 2.99% | 505K | $13.0M | +432 (+0.1%) | September 30, 2026 |
| 2 | Vanguard MStar Total Stk Mkt Idx Invest | 2.88% | 488K | $12.6M | — | August 31, 2026 |
| 3 | iShares Russell 2000 ETF | 2.67% | 451K | $11.6M | −5,184 (−1.1%) | September 30, 2026 |
| 4 | DFA US Small Cap Value I | 1.28% | 217K | $5.6M | +23,538 (+12.2%) | August 31, 2026 |
| 5 | Fidelity Small Cap Index | 1.06% | 179K | $4.6M | +994 (+0.6%) | July 31, 2026 |
| 6 | iShares Russell 2000 Value ETF | 0.95% | 161K | $4.1M | +244 (+0.2%) | September 30, 2026 |
| 7 | DFA US Targeted Value I | 0.71% | 120K | $3.1M | — | August 31, 2026 |
| 8 | EA Bridgeway Omni Small-Cap Value ETF | 0.63% | 107K | $2.7M | — | September 30, 2026 |
| 9 | Dimensional US Targeted Value ETF | 0.61% | 104K | $2.7M | +20 (+0.0%) | September 30, 2026 |
| 10 | Hotchkis & Wiley Sm Cp Divers Val I | 0.60% | 102K | $2.6M | +71,890 (+236.6%) | August 31, 2026 |
| 11 | Dimensional US Small Cap Value ETF | 0.58% | 98K | $2.5M | — | September 24, 2026 |
| 12 | Fidelity Enhanced Small Cap Core ETF | 0.58% | 98K | $2.5M | +204 (+0.2%) | September 30, 2026 |
| 13 | Vanguard Russell 2000 ETF | 0.56% | 95K | $2.5M | +1,011 (+1.1%) | September 30, 2026 |
| 14 | PGIM Quant Solutions Small-Cap Val Z | 0.51% | 86K | $2.2M | — | September 30, 2026 |
| 15 | First Trust Dow Jones Sel MicroCap ETF | 0.40% | 68K | $1.8M | — | September 30, 2026 |
| 16 | Principal SmallCap Value II Instl | 0.40% | 67K | $1.7M | −166 (−0.2%) | September 30, 2026 |
| 17 | Bridgeway Omni Small-Cap Value N | 0.39% | 66K | $1.7M | — | June 30, 2026 |
| 18 | Fidelity Extended Market Index | 0.37% | 63K | $1.6M | −337 (−0.5%) | August 31, 2026 |
| 19 | Scotia Wealth Quant Glbl Sm Cp Eq Pl KM | 0.37% | 62K | $1.6M | −33,000 (−34.8%) | August 31, 2026 |
| 20 | DFA US Small Cap I | 0.36% | 61K | $1.6M | — | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
RBB insider transactions
latest 1| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2025-06-05 | Gary Fan | Sell | $16.73 | 1,451 | $24,275 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
RBB shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns RBB
Institutional investors own 60.4% of RBB Bancorp's shares and insiders 6.37%. The largest holder is BlackRock Inc with 7.64% of the shares (1.3M), as of June 30, 2026. Among the top 20 institutions, 17 added shares and 3 reduced their stake in the latest filings. Short interest is 3.35% of the float, or 5.43 days of average trading volume. The share count rose 33.5% since 2014.
Related: RBB analyst forecast, RBB key metrics, RBB dividend history. See the RBB stock overview for the latest quote and news.
RBB ownership FAQ
Who owns the most RBB Bancorp stock?
The largest shareholders of RBB Bancorp are BlackRock Inc (7.64%), Dimensional Fund Advisors, Inc. (5.33%), Vanguard Capital Management, LLC (3.79%), American Century Companies Inc (3.17%), Acadian Asset Management LLC (2.37%).
What percentage of RBB Bancorp is owned by institutions?
Institutions hold 60.4% of RBB Bancorp's shares outstanding; insiders hold 6.37%.
Which funds own RBB Bancorp?
The largest fund holders of RBB Bancorp are Avantis US Small Cap Value ETF (2.99%), Vanguard MStar Total Stk Mkt Idx Invest (2.88%), iShares Russell 2000 ETF (2.67%), DFA US Small Cap Value I (1.28%), Fidelity Small Cap Index (1.06%).
What is RBB Bancorp's short interest?
530K shares of RBB Bancorp were sold short, 3.35% of the float; at the average daily volume it would take 5.43 days to cover.
Are insiders buying or selling RBB Bancorp?
Of the latest 1 reported insider transactions in RBB Bancorp (since June 5, 2025), 0 were purchases and 1 were sales.
How many shares of RBB Bancorp are outstanding?
RBB Bancorp has 16.9M shares outstanding, of which 15.8M are in the public float.