BY · Byline Bancorp, Inc. · Shareholders & Ownership
Every disclosed holder of BY in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.
Who Owns BY
13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positionsNo chart: the summed disclosures exceed shares outstanding, so they are not parts of one whole.
| Holder group | Shares | % Out |
|---|---|---|
| Institutional (13F) | 24,986,238 | 55.30% |
| Insiders (Forms 3, 4, 5) | 24,141,452 | 53.43% |
| 13D/G-only blocks | 2,052,304 | 4.54% |
| Remaining | 5,993,574 | -13.26% |
| Registered funds (N-PORT, not summed) | 12,093,192 | 26.76% |
Shares outstanding: 45,186,420, the issuer's latest cover-page count restated onto today's split basis.
Remaining is negative: the summed disclosures exceed shares outstanding, as when filings are dated at different times or holders that do not disclose their links count the same shares. It is flagged, not clipped.
13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.
Holders of BY
| # | Holder | Shares | As of | Notes |
|---|---|---|---|---|
| 1 |
|
11,575,953 | ||
| 2 |
MBG Investors I, L.P.
13G
CIK 1710094 · Unknown · Aug 7, 2026
Rule 13d-1(d), exempt investor, not summed
|
11,575,953 | ||
| 2.1 |
|
11,535,145 | ||
| 3 |
BlackRock, Inc.
13F
CIK 2012383 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
3,510,896 | ||
| 3.1 |
iShares Russell 2000 ETF
Fund
S000004344 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
885,786 | ||
| 3.2 |
iShares Russell 2000 Value ETF
Fund
S000004342 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
308,290 | ||
| 3.3 |
BlackRock Advantage Small Cap Core Fund
Fund
S000039982 · Registered fund · May 29, 2026
BlackRock Funds, not summed
|
212,766 | ||
| 3.4 |
iShares Micro-Cap ETF
Fund
S000004439 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
103,912 | ||
| 3.5 |
Master Small Cap Index Series
Fund
S000002716 · Registered fund · Jun 30, 2026
Quantitative Master Series LLC, not summed
|
57,992 | ||
| 4 |
DIMENSIONAL FUND ADVISORS LP
13F
CIK 354204 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
2,424,824 | ||
| 4.1 |
U.S. SMALL CAP VALUE PORTFOLIO
Fund
S000000987 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
521,748 | ||
| 4.2 |
U.S. Targeted Value Portfolio
Fund
S000000970 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
279,801 | ||
| 4.3 |
Dimensional U.S. Targeted Value ETF
Fund
S000070901 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
|
262,513 | ||
| 4.4 |
Dimensional US Small Cap Value ETF
Fund
S000075151 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
|
233,913 | ||
| 4.5 |
U.S. SMALL CAP PORTFOLIO
Fund
S000000971 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
|
195,341 | ||
| 5 |
|
2,038,691 | ||
| 6 |
T. Rowe Price Investment Management, Inc.
13F
CIK 1897612 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,495,588 | ||
| 7 |
VANGUARD CAPITAL MANAGEMENT LLC
13F
CIK 2100119 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,191,625 | ||
| 8 |
|
1,089,293 | ||
| 8.1 |
State Street(R) SPDR(R) S&P(R) Regional Banking ETF
Fund
S000012325 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
|
256,327 | ||
| 8.2 |
State Street(R) SPDR(R) US Small Cap Low Volatility Index ETF
Fund
S000039795 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
|
23,130 | ||
| 8.3 |
STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO
Fund
S000050332 · Registered fund · Jun 30, 2026
STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
|
10,800 | ||
| 8.4 |
State Street Total Return V.I.S. Fund
Fund
S000001637 · Registered fund · Jun 30, 2026
STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed
|
783 | ||
| 8.5 |
State Street Balanced Index Fund
Fund
S000082802 · Registered fund · Jun 30, 2026
STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
|
131 | ||
| 9 |
AMERICAN CENTURY COMPANIES INC
13F
CIK 748054 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
1,009,951 | ||
| 9.1 |
Small Company Fund
Fund
S000005981 · Registered fund · Jun 30, 2026
American Century Quantitative Equity Funds, Inc., not summed
|
13,513 | ||
| 10 |
Boston Partners
13F
CIK 1386060 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
883,689 | ||
| 11 |
FEDERATED HERMES, INC.
13F
CIK 1056288 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
857,825 | ||
| 12 |
AQR CAPITAL MANAGEMENT LLC
13F
CIK 1167557 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
813,855 | ||
| 13 |
GEODE CAPITAL MANAGEMENT, LLC
13F
CIK 1214717 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
810,208 | ||
| 14 |
Avantis U.S. Small Cap Value ETF
Fund
S000066459 · Registered fund · May 31, 2026
American Century ETF Trust, not summed
|
793,112 | ||
| 15 |
VANGUARD TOTAL STOCK MARKET INDEX FUND
Fund
S000002848 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
790,432 | ||
| 16 |
Federated Hermes MDT Small Cap Core Fund
Fund
S000012972 · Registered fund · Jul 31, 2026
Federated Hermes MDT Series, not summed
|
682,710 | ||
| 17 |
JPMORGAN CHASE & CO
13F
CIK 19617 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
507,652 | ||
| 18 |
Ararat Capital Management LP
13F
CIK 1768757 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
490,609 | ||
| 19 |
WELLINGTON MANAGEMENT GROUP LLP
13F
CIK 902219 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
488,460 | ||
| 20 |
|
437,302 | ||
| 20.1 |
College Retirement Equities Fund - Total Global Stock Account
Fund
S000005080 · Registered fund · Jun 30, 2026
College Retirement Equities Fund, not summed
|
346,474 | ||
| 20.2 |
Nuveen Small Cap Blend Index Fund
Fund
S000005367 · Registered fund · Jul 31, 2026
TIAA-CREF Funds, not summed
|
40,750 | ||
| 20.3 |
Nuveen Equity Index Fund
Fund
S000005360 · Registered fund · Jul 31, 2026
TIAA-CREF Funds, not summed
|
26,244 | ||
| 20.4 |
TIAA Separate Account VA-1 - Stock Index Account
Fund
S000005098 · Registered fund · Jun 30, 2026
TIAA Separate Account VA-1, not summed
|
241 | ||
| 20.5 |
Nuveen Life Stock Index Fund
Fund
S000005094 · Registered fund · Jun 30, 2026
TIAA-CREF Life Funds, not summed
|
231 | ||
| 21 |
BRIDGEWAY CAPITAL MANAGEMENT, LLC
13F
CIK 1107261 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
424,253 | ||
| 21.1 |
Omni Small-Cap Value Fund
Fund
S000033567 · Registered fund · Jun 30, 2026
Bridgeway Funds, Inc., not summed
|
129,800 | ||
| 21.2 |
Small-Cap Value Fund
Fund
S000004427 · Registered fund · Jun 30, 2026
Bridgeway Funds, Inc., not summed
|
81,200 | ||
| 22 |
|
414,218 | ||
| 23 |
VANGUARD EXTENDED MARKET INDEX FUND
Fund
S000002841 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
374,758 | ||
| 24 |
VANGUARD PORTFOLIO MANAGEMENT LLC
13F
CIK 2100121 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
362,683 | ||
| 25 |
TWO SIGMA INVESTMENTS, LP
13F
CIK 1179392 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
350,081 | ||
| 26 |
MORGAN STANLEY
13F
CIK 895421 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
301,094 | ||
| 26.1 |
E*TRADE No Fee Total Market Index Fund
Fund
S000090722 · Registered fund · Jul 31, 2026
E Trade Trust, not summed
|
87 | ||
| 27 |
NORTHERN TRUST CORP
13F
CIK 73124 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
295,900 | ||
| 27.1 |
Small Cap Index Fund
Fund
S000001245 · Registered fund · Jun 30, 2026
Northern Funds, not summed
|
15,680 | ||
| 27.2 |
FlexShares Morningstar US Market Factor Tilt Index Fund
Fund
S000033312 · Registered fund · Jul 31, 2026
FlexShares Trust, not summed
|
7,504 | ||
| 27.3 |
Small Cap Core Fund
Fund
S000001244 · Registered fund · Jun 30, 2026
Northern Funds, not summed
|
4,219 | ||
| 28 |
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
13F
CIK 884546 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
269,067 | ||
| 28.1 |
Schwab U.S. Small-Cap ETF
Fund
S000026636 · Registered fund · May 31, 2026
SCHWAB STRATEGIC TRUST, not summed
|
157,389 | ||
| 28.2 |
Schwab Small-Cap Index Fund
Fund
S000005912 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
|
74,865 | ||
| 28.3 |
Schwab Total Stock Market Index Fund
Fund
S000005913 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
|
21,660 | ||
| 28.4 |
Schwab U.S. Broad Market ETF
Fund
S000026631 · Registered fund · May 31, 2026
SCHWAB STRATEGIC TRUST, not summed
|
19,636 | ||
| 29 |
MILLENNIUM MANAGEMENT LLC
13F
CIK 1273087 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
250,593 | ||
| 30 |
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
13F
CIK 1164508 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
245,280 | ||
| 31 |
ENDEAVOUR CAPITAL ADVISORS INC
13F
CIK 1218749 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
238,671 | ||
| 32 |
Qube Research & Technologies Ltd
13F
CIK 1729829 · Exempt reporting adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
219,168 | ||
| 33 |
Empowered Funds, LLC
13F
CIK 1592828 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
213,253 | ||
| 33.1 |
EA Bridgeway Omni Small-Cap Value ETF
Fund
S000078089 · Registered fund · Jun 30, 2026
EA Series Trust, not summed
|
213,253 | ||
| 34 |
GOLDMAN SACHS GROUP INC
13F
CIK 886982 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
212,551 | ||
| 34.1 |
Multi-Manager U.S. Small Cap Equity Fund
Fund
S000051363 · Registered fund · Apr 30, 2026
Goldman Sachs Trust II, not summed
|
14,990 | ||
| 34.2 |
Goldman Sachs ActiveBeta(R) U.S. Small Cap Equity ETF
Fund
S000048296 · Registered fund · May 31, 2026
Goldman Sachs ETF Trust, not summed
|
10,059 | ||
| 34.3 |
Goldman Sachs Multi-Manager Global Equity Fund
Fund
S000049146 · Registered fund · Jul 31, 2026
Goldman Sachs Trust II, not summed
|
9,662 | ||
| 34.4 |
Goldman Sachs Absolute Return Tracker Fund
Fund
S000020314 · Registered fund · Jun 30, 2026
GOLDMAN SACHS TRUST, not summed
|
5,519 | ||
| 35 |
VANGUARD FIDUCIARY TRUST CO
13F
CIK 933478 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
210,966 | ||
| 36 |
|
194,276 | ||
| 37 |
DENALI ADVISORS LLC
13F
CIK 1142941 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
185,516 | ||
| 38 |
FMR LLC
13F
CIK 315066 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
182,355 | ||
| 38.1 |
Fidelity Small Cap Index Fund
Fund
S000033638 · Registered fund · Jul 31, 2026
Fidelity Salem Street Trust, not summed
|
333,771 | ||
| 38.2 |
Fidelity Extended Market Index Fund
Fund
S000006021 · Registered fund · May 31, 2026
Fidelity Concord Street Trust, not summed
|
169,215 | ||
| 38.3 |
Fidelity Enhanced Small Cap Core ETF
Fund
S000081807 · Registered fund · Jun 30, 2026
Fidelity Covington Trust, not summed
|
141,137 | ||
| 38.4 |
Fidelity SAI Small-Mid Cap Momentum Index Fund
Fund
S000050321 · Registered fund · Jul 31, 2026
Fidelity Salem Street Trust, not summed
|
100,186 | ||
| 38.5 |
Fidelity Total Market Index Fund
Fund
S000006026 · Registered fund · May 31, 2026
Fidelity Concord Street Trust, not summed
|
64,674 | ||
| 39 |
Boston Partners Small Cap Value Fund II
Fund
S000001094 · Registered fund · May 31, 2026
RBB Fund, Inc., not summed
|
176,721 | ||
| 40 |
Bank of New York Mellon Corp
13F
CIK 1390777 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
167,130 | ||
| 41 |
Creative Planning
13F
CIK 1540235 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
163,467 | ||
| 42 |
Detalus Advisors, LLC
13F
CIK 1799677 · Registered investment adviser · Sep 30, 2026
|
163,050 | ||
| 43 |
VANGUARD RUSSELL 2000 INDEX FUND
Fund
S000030003 · Registered fund · May 31, 2026
VANGUARD SCOTTSDALE FUNDS, not summed
|
158,831 | ||
| 44 |
Thrivent Financial for Lutherans
13F
CIK 314984 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
157,091 | ||
| 44.1 |
THRIVENT MODERATELY AGGRESSIVE ALLOCATION PORTFOLIO
Fund
S000001427 · Registered fund · Jun 30, 2026
Thrivent Series Fund, Inc., not summed
|
30,183 | ||
| 44.2 |
THRIVENT MODERATE ALLOCATION PORTFOLIO
Fund
S000001438 · Registered fund · Jun 30, 2026
Thrivent Series Fund, Inc., not summed
|
29,804 | ||
| 44.3 |
THRIVENT MODERATELY AGGRESSIVE ALLOCATION FUND
Fund
S000001347 · Registered fund · Jul 31, 2026
Thrivent Mutual Funds, not summed
|
21,211 | ||
| 44.4 |
THRIVENT MODERATE ALLOCATION FUND
Fund
S000001346 · Registered fund · Jul 31, 2026
Thrivent Mutual Funds, not summed
|
14,532 | ||
| 44.5 |
THRIVENT AGGRESSIVE ALLOCATION FUND
Fund
S000000700 · Registered fund · Jul 31, 2026
Thrivent Mutual Funds, not summed
|
14,080 | ||
| 45 |
BANK OF AMERICA CORP /DE/
13F
CIK 70858 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
151,407 | ||
| 46 |
Curi Capital, LLC
13F
CIK 1332905 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
143,042 | ||
| 46.1 |
RMB Mendon Financial Services Fund
Fund
S000002998 · Registered fund · Jun 30, 2026
RMB Investors Trust, not summed
|
125,000 | ||
| 47 |
ZACKS INVESTMENT MANAGEMENT
13F
CIK 1086483 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
139,641 | ||
| 47.1 |
Zacks Small/Mid Cap ETF
Fund
S000081958 · Registered fund · May 31, 2026
Zacks Trust, not summed
|
52,453 | ||
| 47.2 |
Zacks Small-Cap Core Fund
Fund
S000081341 · Registered fund · May 31, 2026
Zacks Trust, not summed
|
2,312 | ||
| 48 |
Mariner, LLC
13F
CIK 1373442 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
137,192 | ||
| 49 |
BARTLETT & CO. WEALTH MANAGEMENT LLC
13F
CIK 2010186 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
134,158 | ||
| 50 |
MALTESE CAPITAL MANAGEMENT LLC
13F
CIK 1040762 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
130,000 |
48 more nested rows are not shown here; Every filing lists them all.
Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.
Showing 1–50 of 346 holders
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