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BY · Byline Bancorp, Inc. · Shareholders & Ownership

Track BY — free
$37.62 +0.54 (+1.46%) At close · Oct 20
Market Cap
$1.70B
Shares
45.19M
Volume · Oct 20 188.84K Avg daily vol (3M) 259.79K

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 positions

No 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
1
DEL VALLE PEROCHENA ANTONIO
Insider CIK 1709907 · Aug 7, 2026
Director, 10% Owner, issuer-wide
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
MBG INVESTORS I, L.P.
Insider CIK 1710094 · Aug 7, 2026
10% Owner, issuer-wide
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
Eugenio Santiago Clariond Reyes
13G CIK 1190388 · Mar 19, 2024
Rule 13d-1(c), passive investor
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
STATE STREET CORP
13F CIK 93751 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
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
Nuveen, LLC
13F CIK 1871926 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
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
HERENCIA ROBERTO R
Insider CIK 1214993 · Aug 13, 2026
Director, issuer-wide
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
Paracchini Alberto J
Insider CIK 1482596 · Feb 22, 2026
Director, PRESIDENT, issuer-wide
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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Key facts CIK 1702750 CUSIP 124411109 13F (30d) 25 filings 25 filers Visit website Investor relations