$BY

$38.68 +$0.28 (0.73%) Close

$BY Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 45.2M shares outstanding

Who owns BY?

By type of holder

Institutions 55.1% Insiders 44.9% Everyone else 0.0%

Concentration Top 10 holders own 103.4%

Del Valle Perochena Antonio 51.1% · MBG Investors I, L.P. 25.5%

Institutional ownership

55.1%

-0.3 pts vs last qtr

Institutional holders

206

+18 vs last qtr

Net shares bought

−132.3K

by institutions in Q2 2026

New / sold out

35 / 17

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

T. Rowe Price Investment Management, Inc. +880.9K
Federated Hermes, Inc. +233.4K

Biggest sellers in Q2 2026

Aristotle Capital Boston, LLC SOLD OUT −674.8K
FMR LLC −643.7K

Who is planning to sell?

Notices of proposed sale, last 12 months

$1.41M

4 notices from 4 people

Shares covered

36.5K

0.08% of the company

Arranged in advance

of the value is under a 10b5-1 plan

Under a 10b5-1 plan No plan

Largest proposed sellers

Roberto Herencia Director $785K
Brogan Ptacin Director $375K

Every notice on Red Flags →

A Form 144 is notice of a planned sale, not the sale itself. What insiders actually sold is on Insider Transactions.

Is your stake being diluted?

Diluted share count, FY2016–FY2025

+120.6%

+9.19% a year

Each share's claim on the business

−54.7%

shrank without buying or selling a share

Spent on buybacks vs paid in stock

$71.5M vs $41.4M

over 10 fiscal years

Diluted shares, split-adjusted

Buybacks Stock-based comp

How patient are the owners?

Institutional shares by how long they've been held

5+ years68% 3–5 years7% 1–3 years18% Under 1 year7%

Quarterly turnover

12.7%

of institutional shares changed hands

Top 10 managers, median time held

5 years

Super Investors

Investment managers reporting BY on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
B BlackRock, Inc.	3.5M	7.77%	+216.0K (+6.6%)	≤2021	0.0%
Shares held by quarter Peak holding3.5M (Q2'26) Change over 8 quarters+617.2K Share of the company7.770% BlackRock, Inc.'s full portfolio →
DF Dimensional Fund Advisors LP	2.4M	5.37%	+58.2K (+2.5%)	≤2021	0.0%
Shares held by quarter Peak holding2.4M (Q2'26) Change over 8 quarters+390.5K Share of the company5.370% Dimensional Fund Advisors LP's full portfolio →

BlackRock, Inc.

3.5M

% of company

7.77%

Change vs last qtr

+216.0K (+6.6%)

Held since

≤2021

Dimensional Fund Advisors LP

2.4M

% of company

5.37%

Change vs last qtr

+58.2K (+2.5%)

Held since

≤2021

28 more super investors behind a free account

See every manager holding Byline Bancorp Inc, how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting BY on Form N-PORT; together they hold 27.5% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
IR iShares Russell 2000 ETF iShares Trust	$33.4M	885.8K	1.96%	0.04%	June 30, 2026
VT Vanguard Total Stock Market Index Fund Vanguard Index Funds	$29.8M	790.4K	1.75%	0.00%	June 30, 2026

iShares Russell 2000 ETF

iShares Trust

Position value

$33.4M

% of company

1.96%

% of the fund

0.04%

As of

June 30, 2026

Vanguard Total Stock Market Index Fund

Vanguard Index Funds

Position value

$29.8M

% of company

1.75%

% of the fund

0.00%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding Byline Bancorp Inc and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
DV Del Valle Perochena Antonio Insider	23.1M	51.09%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company51.090% Del Valle Perochena Antonio's insider activity →
MI MBG Investors I, L.P. Insider	11.5M	25.53%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company25.530% MBG Investors I, L.P.'s insider activity →

Del Valle Perochena Antonio

Insider

23.1M

% of company

51.09%

Change vs last qtr

—

Held since

—

MBG Investors I, L.P.

Insider

11.5M

% of company

25.53%

Change vs last qtr

—

Held since

—

20 more holders behind a free account

See every insider and 5%+ holder of Byline Bancorp Inc.

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