Comparable stake leader
MBG INVESTORS I, L.P.
SEC ownership of BYLINE BANCORP, INC.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001702750.
Disclosed value leader
Perochena Antonio del Valle
Comparable rows
50/50
Latest evidence
19 Aug 2026
- Public ticker
- BY on NYSE
- Parsed ownership sources
-
3/4/5, 13D/G, and 13F
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
MBG INVESTORS I, L.P.
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
MBG INVESTORS I, L.P.
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
19 Aug 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001702750
- Issuer location
- Chicago, IL
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of BYLINE BANCORP, INC. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
MBG INVESTORS I, L.P.
Disclosed value leader
Perochena Antonio del Valle
Comparable rows
50/50
Latest evidence
19 Aug 2026
3/4/5
13D/G
13F
Lead comparable stake: 26%
13D/G row: MBG INVESTORS I, L.P.
Showing 1-8 of 50 holder rows.
Quick read
MBG INVESTORS I, L.P. leads the comparable SEC ownership view at 26%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens MBG INVESTORS I, L.P.'s linked filing trail.
Comparable ownership
Top 5
MBG INVESTORS I, L.P.
26%
DIMENSIONAL FUND ADVISORS LP
5.1%
BlackRock, Inc.
5%
Estate of Daniel L. Goodwin
0.03%
Perochena Antonio del Valle
26%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| MBG INVESTORS I, L.P. |
3/4/5
13D/G
10%+ Owner · ANTONIO DEL VALLE PEROCHENA
|
26%
from 13D/G
|
$451,024,169
11,535,145 shares
|
-$11,730,000 | 07 Aug 2026 |
| DIMENSIONAL FUND ADVISORS LP |
13F
13D/G
Company
|
5.1%
from 13D/G
|
$91,319,164
2,424,824 shares
|
— | 30 Jun 2026 |
| BlackRock, Inc. |
13F
13D/G
Company
|
5%
from 13D/G
|
$132,220,327
3,510,896 shares
|
— | 30 Jun 2026 |
| Estate of Daniel L. Goodwin |
13D/G
|
0.03%
|
$368,232
13,613 shares
|
$0 | 30 Jun 2025 |
| Perochena Antonio del Valle |
3/4/5
Director, 10%+ Owner
|
26%
|
$452,560,998
11,575,953 shares
|
-$11,730,000 | 07 Aug 2026 |
| Roberto R. Herencia |
3/4/5
CHIEF EXECUTIVE OFFICER, Director
|
0.95%
|
$19,644,268
430,830 shares
mixed-class rows
|
-$774,307 | 13 Aug 2026 |
| Alberto J. Paracchini |
3/4/5
PRESIDENT, Director
|
0.43%
|
$6,436,363
194,276 shares
|
— | 22 Feb 2026 |
| Steven P. Kent |
3/4/5
Director
|
0.2%
|
$2,249,399
90,000 shares
|
— | 11 Jun 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$25,101,463.
Buys
$59,677
Insiders: 4
Sells
$25,161,140
Insiders: 6
Net
-$25,101,463
Shares: -650,295
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 1,784
Shares: 652,079
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 400 | 622,171 | $15,348 | $24,328,726 | -$24,313,377 |
| 3-6 | 400 | 0 | $12,446 | $0 | +$12,446 |
| 6-9 | 919 | 4,509 | $30,091 | $145,776 | -$115,684 |
| 9-12 | 65 | 25,399 | $1,791 | $686,638 | -$684,847 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 25 reporting-owner rows connected to BYLINE BANCORP, INC.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
25
Largest Forms 3/4/5 holder
Perochena Antonio del Valle
Net 12M change
-$25,101,464
Latest report
19 Aug 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Perochena Antonio del Valle | Director, 10%+ Owner | $452,560,998 | -$11,730,000 | -2.5% | Mixed | 07 Aug 2026 |
| MBG INVESTORS I, L.P. | 10%+ Owner | $451,024,169 | -$11,730,000 | -2.5% | Filing P/S | 07 Aug 2026 |
| Roberto R. Herencia | CHIEF EXECUTIVE OFFICER, Director | $19,644,268 | -$774,307 | -3.8% | Mixed | 13 Aug 2026 |
| Alberto J. Paracchini | PRESIDENT, Director | $6,436,363 | Mixed | 22 Feb 2026 | ||
| Brogan Ptacin | Head Of Commercial Banking | $2,285,008 | Mixed | 03 Aug 2026 | ||
| Steven P. Kent | Director | $2,249,399 | Mixed | 11 Jun 2025 | ||
| Thomas J. Bell III | Evp Chief Financial Officer | $1,900,800 | Mixed | 22 Feb 2026 | ||
| Carlos Ruiz Sacristan | Director | $1,463,710 | Mixed | 08 Jun 2026 | ||
| Thomas Abraham | President, Sbc | $1,428,996 | -$629,147 | -31% | Mixed | 16 Apr 2026 |
| Lindsay Y. Corby | EVP and CFO | $1,258,190 | Mixed | 08 Jun 2022 | ||
| Megan Biggam | Evp Head Of Community Banking | $1,147,556 | Mixed | 22 Feb 2026 | ||
| Mark Fucinato | Chief Credit Officer | $817,946 | Mixed | 22 Feb 2026 | ||
| Mary Jo S. Herseth | Director | $733,344 | +$20,767 | +2.9% | Filing P/S | 19 Aug 2026 |
| John Barkidjija | Head Of Cre & Specialty Fin | $622,126 | -$145,776 | -19% | Filing P/S | 26 Feb 2026 |
| Maria Sherylle A. Olano | Svp, Chief Accounting Officer | $621,783 | Mixed | 22 Feb 2026 | ||
| Phillip R. Cabrera | Director | $590,761 | +$5,244 | +0.9% | Mixed | 28 Jan 2026 |
| William G. Kistner | Director | $586,283 | +$8,818 | +1.5% | Mixed | 19 Aug 2026 |
| Nicolas Mando | Chief Technology & Operations | $516,596 | Mixed | 22 Feb 2026 | ||
| Dana Rose | Chief Human Resources Officer | $452,595 | -$151,910 | -25% | Filing P/S | 12 Aug 2026 |
| Michelle Lynn Johnson | Chief Risk Officer | $366,351 | Mixed | 22 Feb 2026 |
Recent insider transactions for BYLINE BANCORP, INC.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| William G. Kistner | BY | Common stock | Purchase | 0.7% | $3,830 | $38.30 | 100 | 14,289 | 19 Aug 2026 | William G. Kistner Trust Date June 22, 1973 |
| Mary Jo S. Herseth | BY | Common stock | Purchase | 1.6% | $11,518 | $38.40 | 300 | 19,100 | 19 Aug 2026 | The Herseth Family Revocable Trust Dated 12/02/25 |
| Roberto R. Herencia | BY | Common stock | Sale | -4.58% | $774,307 | $39.21 | -19,750 | 411,643 | 13 Aug 2026 | Direct |
| Dana Rose | BY | Common stock | Sale | -17.3% | $94,419 | $39.00 | -2,421 | 11,605 | 12 Aug 2026 | Direct |
| MBG INVESTORS I, L.P. | BY | Common stock | Sale | -2.53% | $11,730,000 | $39.10 | -300,000 | 11,535,145 | 07 Aug 2026 | Direct |
| Perochena Antonio del Valle | BY | Common stock | Sale | -2.53% | $11,730,000 | $39.10 | -300,000 | 11,535,145 | 07 Aug 2026 | By MBG Investors I, L.P. |
| Brogan Ptacin | BY | Common stock | Disposed to Issuer | -26.8% | -9,450 | 25,859 | 03 Aug 2026 | Direct | ||
| Brogan Ptacin | BY | Common stock | Award | 36.5% | 9,450 | 35,309 | 03 Aug 2026 | Direct | ||
| Brogan Ptacin | BY | Common Stock | Options Exercise | -100% | -9,450 | 0 | 03 Aug 2026 | Direct | ||
| Carlos Ruiz Sacristan | BY | Common Stock | Award | 12.8% | 1,533 | 13,533 | 08 Jun 2026 | Direct | ||
| Velez Margarita Hugues | BY | Common Stock | Award | 21.3% | 1,533 | 8,722 | 08 Jun 2026 | Direct | ||
| Velez Margarita Hugues | BY | Common Stock | Tax liability | -6.87% | -530 | 7,189 | 02 Jun 2026 | Direct | ||
| William G. Kistner | BY | Common stock | Purchase | 0.71% | $3,197 | $31.97 | 100 | 14,189 | 04 May 2026 | William G. Kistner Trust Date June 22, 1973 |
| Thomas Abraham | BY | Comon stock | Award | 5.58% | 2,406 | 45,539 | 16 Apr 2026 | Direct | ||
| Mary Jo S. Herseth | BY | Common stock | Purchase | 1.62% | $9,249 | $30.83 | 300 | 18,800 | 16 Mar 2026 | The Herseth Family Revocable Trust Dated 12/02/25 |
| John Barkidjija | BY | Common stock | Sale | -19% | $145,776 | $32.33 | -4,509 | 19,243 | 26 Feb 2026 | Direct |
| Nicolas Mando | BY | Common stock | Tax liability | -8.84% | -1,408 | 14,525 | 22 Feb 2026 | Direct | ||
| Nicolas Mando | BY | Common stock | Award | 32% | 3,935 | 16,229 | 22 Feb 2026 | Direct | ||
| Mark Fucinato | BY | Common stock | Tax liability | -9.16% | -2,353 | 23,330 | 22 Feb 2026 | Direct | ||
| Mark Fucinato | BY | Common stock | Award | 32.2% | 6,241 | 25,623 | 22 Feb 2026 | Direct | ||
| Alberto J. Paracchini | BY | Common stock | Tax liability | -3.16% | -6,158 | 188,990 | 22 Feb 2026 | Direct | ||
| Alberto J. Paracchini | BY | Common stock | Award | 10.9% | 19,332 | 197,019 | 22 Feb 2026 | Direct | ||
| Roberto R. Herencia | BY | Common stock | Tax liability | -4.01% | -17,187 | 411,421 | 22 Feb 2026 | Direct | ||
| Roberto R. Herencia | BY | Common stock | Award | 14.1% | 54,679 | 441,291 | 22 Feb 2026 | Direct | ||
| Dana Rose | BY | Common stock | Tax liability | -13.9% | -1,994 | 12,344 | 22 Feb 2026 | Direct | ||
| Dana Rose | BY | Common stock | Award | 64.4% | 5,828 | 14,881 | 22 Feb 2026 | Direct | ||
| Michelle Lynn Johnson | BY | Common stock | Tax liability | -12.2% | -1,339 | 9,630 | 22 Feb 2026 | Direct | ||
| Michelle Lynn Johnson | BY | Common stock | Award | 61% | 4,432 | 11,695 | 22 Feb 2026 | Direct | ||
| Megan Biggam | BY | Common stock | Tax liability | -4.16% | -1,450 | 33,400 | 22 Feb 2026 | Direct | ||
| Megan Biggam | BY | Common stock | Award | 13.3% | 4,147 | 35,316 | 22 Feb 2026 | Direct | ||
| John Barkidjija | BY | Common stock | Tax liability | -8.77% | -2,149 | 22,356 | 22 Feb 2026 | Direct | ||
| John Barkidjija | BY | Common stock | Award | 32.4% | 6,023 | 24,590 | 22 Feb 2026 | Direct | ||
| Brogan Ptacin | BY | Common stock | Tax liability | -8.29% | -2,196 | 24,302 | 22 Feb 2026 | Direct | ||
| Brogan Ptacin | BY | Common stock | Award | 30.7% | 6,281 | 26,717 | 22 Feb 2026 | Direct | ||
| Thomas J. Bell III | BY | Common stock | Tax liability | -8.54% | -5,059 | 54,155 | 22 Feb 2026 | Direct | ||
| Thomas J. Bell III | BY | Common stock | Award | 23.6% | 11,396 | 59,702 | 22 Feb 2026 | Direct | ||
| Brian F. Doran | BY | Common Stock | Award | 237.7% | 1,783 | 2,533 | 22 Feb 2026 | Direct | ||
| Maria Sherylle A. Olano | BY | Common stock | Tax liability | -5.21% | -1,032 | 18,768 | 22 Feb 2026 | Direct | ||
| Maria Sherylle A. Olano | BY | Common stock | Award | 13.6% | 2,378 | 19,800 | 22 Feb 2026 | Direct | ||
| Thomas Abraham | BY | Comon stock | Tax liability | -6.18% | -2,843 | 43,133 | 22 Feb 2026 | Direct | ||
| Thomas Abraham | BY | Comon stock | Award | 18.2% | 7,094 | 45,976 | 22 Feb 2026 | Direct | ||
| Brian F. Doran | BY | Common Stock | Purchase | $24,847 | $33.13 | 750 | 750 | 17 Feb 2026 | Direct | |
| Phillip R. Cabrera | BY | Common Stock | Purchase | 4.27% | $5,244 | $31.03 | 169 | 4,129 | 28 Jan 2026 | By Phillip R. Cabrera Revocable Trust |
| Mary Jo S. Herseth | BY | Common stock | Other | 18,500 | 18,500 | 10 Dec 2025 | The Herseth Family Revocable Trust Dated 12/02/25 | |||
| Mary Jo S. Herseth | BY | Common stock | Other | -100% | -18,500 | 0 | 10 Dec 2025 | Direct | ||
| Thomas Abraham | BY | Comon stock | Sale | -37.6% | $629,147 | $26.89 | -23,400 | 38,882 | 28 Oct 2025 | Direct |
| William G. Kistner | BY | Common stock | Purchase | 0.46% | $1,791 | $27.56 | 65 | 14,089 | 28 Oct 2025 | William G. Kistner Trust Date June 22, 1973 |
| Dana Rose | BY | Common stock | Sale | -16.4% | $57,491 | $28.76 | -1,999 | 10,192 | 12 Sep 2025 | Direct |
* marks a reported price that did not pass the local price check.