Byline Bancorp, Inc. (BY) Ownership
BY ownership summary
as of October 18, 2026- Institutions
- 56.7% of shares outstanding
- Insiders
- 27.75% of shares outstanding
- Shares outstanding
- 45.2M
- Float
- 32.4M shares available to trade
- Short interest
- 7.06% 1.4M shares short
- Days to cover
- 4.86 short interest up 43.7% vs prior month
- Institutions 56.74%
- Insiders 27.75%
- Other investors 15.51%
BY top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 7.77% | 3.5M | $130.9M | +215,973 (+6.6%) | June 30, 2026 |
| 2 | Dimensional Fund Advisors, Inc. | 5.37% | 2.4M | $90.4M | +58,224 (+2.5%) | June 30, 2026 |
| 3 | T. Rowe Price Investment Management,Inc. | 3.31% | 1.5M | $55.8M | +880,879 (+143.3%) | June 30, 2026 |
| 4 | Vanguard Capital Management, LLC | 2.64% | 1.2M | $44.4M | −66,974 (−5.3%) | June 30, 2026 |
| 5 | State Street Corp | 2.41% | 1.1M | $40.6M | +58,231 (+5.6%) | June 30, 2026 |
| 6 | American Century Companies Inc | 2.24% | 1.0M | $37.7M | +104,762 (+11.6%) | June 30, 2026 |
| 7 | Boston Partners Global Investors, Inc | 1.96% | 884K | $32.9M | −34,760 (−3.8%) | June 30, 2026 |
| 8 | Federated Hermes Inc | 1.90% | 858K | $32.0M | +233,404 (+37.4%) | June 30, 2026 |
| 9 | AQR Capital Management LLC | 1.80% | 814K | $30.3M | +148,469 (+22.3%) | June 30, 2026 |
| 10 | Geode Capital Management, LLC | 1.79% | 810K | $30.2M | +22,175 (+2.8%) | June 30, 2026 |
| 11 | JPMorgan Chase & Co | 1.12% | 508K | $18.9M | +48,235 (+10.5%) | June 30, 2026 |
| 12 | Ararat Capital Management, LP | 1.09% | 491K | $18.3M | −133,163 (−21.3%) | June 30, 2026 |
| 13 | Wellington Management Company LLP | 1.08% | 488K | $18.2M | −535,488 (−52.3%) | June 30, 2026 |
| 14 | Nuveen, LLC | 0.97% | 437K | $16.3M | +12,435 (+2.9%) | June 30, 2026 |
| 15 | Bridgeway Capital Management, LLC | 0.94% | 424K | $15.8M | +728 (+0.2%) | June 30, 2026 |
| 16 | Vanguard Portfolio Management, LLC | 0.80% | 363K | $13.5M | +26,844 (+8.0%) | June 30, 2026 |
| 17 | Two Sigma Investments LLC | 0.77% | 350K | $13.1M | +143,127 (+69.2%) | June 30, 2026 |
| 18 | Morgan Stanley - Brokerage Accounts | 0.67% | 301K | $11.2M | +19,103 (+6.8%) | June 30, 2026 |
| 19 | Northern Trust Corp | 0.65% | 296K | $11.0M | +29,488 (+11.1%) | June 30, 2026 |
| 20 | Charles Schwab Investment Management Inc | 0.60% | 269K | $10.0M | +620 (+0.2%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 16 holders added 2.0M shares and 4 cut 770K.
BY top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Avantis US Small Cap Value ETF | 2.03% | 917K | $34.2M | +792 (+0.1%) | September 30, 2026 |
| 2 | iShares Russell 2000 ETF | 1.86% | 842K | $31.4M | +18,958 (+2.3%) | September 30, 2026 |
| 3 | Vanguard MStar Total Stk Mkt Idx Invest | 1.75% | 790K | $29.5M | — | August 31, 2026 |
| 4 | T. Rowe Price Small-Cap Value | 1.52% | 686K | $25.6M | — | September 30, 2026 |
| 5 | Federated Hermes MDT Small Cap Core IS | 1.43% | 646K | $24.1M | +187,993 (+41.1%) | June 30, 2026 |
| 6 | DFA US Small Cap Value I | 1.22% | 551K | $20.5M | +29,267 (+5.6%) | August 31, 2026 |
| 7 | T. Rowe Price Small-Cap Stock | 0.94% | 426K | $15.9M | +174,876 (+69.6%) | September 30, 2026 |
| 8 | State Street® SPDR® S&PRgnllBkgETF | 0.86% | 388K | $14.5M | +11,584 (+3.1%) | September 30, 2026 |
| 9 | Fidelity Small Cap Index | 0.74% | 334K | $12.4M | +2,579 (+0.8%) | July 31, 2026 |
| 10 | CREF Total Global Stock Account R3 | 0.68% | 309K | $11.5M | −44,247 (−12.5%) | August 31, 2026 |
| 11 | iShares Russell 2000 Value ETF | 0.66% | 298K | $11.1M | +452 (+0.2%) | September 30, 2026 |
| 12 | DFA US Targeted Value I | 0.62% | 280K | $10.4M | — | August 31, 2026 |
| 13 | Dimensional US Targeted Value ETF | 0.58% | 263K | $9.8M | +33 (+0.0%) | September 30, 2026 |
| 14 | BlackRock Advantage Small Cap Core Instl | 0.57% | 256K | $9.5M | −360 (−0.1%) | August 31, 2026 |
| 15 | Dimensional US Small Cap Value ETF | 0.55% | 248K | $9.2M | +164 (+0.1%) | September 24, 2026 |
| 16 | T. Rowe Price Instl Small-Cap Stock | 0.52% | 235K | $8.8M | +97,338 (+70.8%) | September 30, 2026 |
| 17 | EA Bridgeway Omni Small-Cap Value ETF | 0.45% | 203K | $7.6M | −2,928 (−1.4%) | September 30, 2026 |
| 18 | DFA US Small Cap I | 0.43% | 195K | $7.3M | — | August 31, 2026 |
| 19 | Vanguard Russell 2000 ETF | 0.40% | 180K | $6.7M | +1,777 (+1.0%) | September 30, 2026 |
| 20 | Schwab US Small-Cap ETF™ | 0.38% | 170K | $6.3M | +108 (+0.1%) | September 30, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
BY insider transactions
latest 10| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-03-16 | Mary Jo S Herseth | Buy | $30.83 | 300 | $9,249 |
| 2026-01-28 | Phillip R Cabrera | Buy | $31.03 | 169 | $5,244 |
| 2025-10-28 | Thomas Abraham | Sell | $26.89 | 23,400 | $629,226 |
| 2025-10-28 | William G Kistner | Buy | $27.56 | 65 | $1,791 |
| 2025-09-12 | Dana Rose | Sell | $28.76 | 1,999 | $57,491 |
| 2025-08-08 | William G Kistner | Buy | $25.70 | 60 | $1,542 |
| 2025-06-13 | William G Kistner | Buy | $25.29 | 164 | $4,148 |
| 2025-06-11 | Phillip R Cabrera | Buy | $24.75 | 2,360 | $58,410 |
| 2025-06-10 | Megan Biggam | Sell | $26.75 | 3,611 | $96,594 |
| 2025-06-09 | Megan Biggam | Sell | $26.75 | 8,576 | $229,408 |
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.
BY shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns BY
Institutional investors own 56.7% of Byline Bancorp's shares and insiders 27.75%. The largest holder is BlackRock Inc with 7.77% of the shares (3.5M), as of June 30, 2026. Among the top 20 institutions, 16 added shares and 4 reduced their stake in the latest filings. Short interest is 7.06% of the float, or 4.86 days of average trading volume. The share count rose 167.2% since 2015.
Related: BY analyst forecast, BY key metrics, BY dividend history. See the BY stock overview for the latest quote and news.
BY ownership FAQ
Who owns the most Byline Bancorp stock?
The largest shareholders of Byline Bancorp are BlackRock Inc (7.77%), Dimensional Fund Advisors, Inc. (5.37%), T. Rowe Price Investment Management,Inc. (3.31%), Vanguard Capital Management, LLC (2.64%), State Street Corp (2.41%).
What percentage of Byline Bancorp is owned by institutions?
Institutions hold 56.7% of Byline Bancorp's shares outstanding; insiders hold 27.75%.
Which funds own Byline Bancorp?
The largest fund holders of Byline Bancorp are Avantis US Small Cap Value ETF (2.03%), iShares Russell 2000 ETF (1.86%), Vanguard MStar Total Stk Mkt Idx Invest (1.75%), T. Rowe Price Small-Cap Value (1.52%), Federated Hermes MDT Small Cap Core IS (1.43%).
What is Byline Bancorp's short interest?
1.4M shares of Byline Bancorp were sold short, 7.06% of the float; at the average daily volume it would take 4.86 days to cover.
Are insiders buying or selling Byline Bancorp?
Of the latest 10 reported insider transactions in Byline Bancorp (since June 9, 2025), 6 were purchases and 4 were sales.
How many shares of Byline Bancorp are outstanding?
Byline Bancorp has 45.2M shares outstanding, of which 32.4M are in the public float.