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BY SCHEDULE 13G/A: SEC filing

MBG Investors I, L.P. and Antonio del Valle Perochena

Filed with the SEC on · accession 0001710094-26-000004

BY filed a SCHEDULE 13G/A (schedule 13g/a) with the SEC on Aug 17, 2026. A report the company filed with the SEC (the US market regulator). The stock moved -0.3% by the first close after the filing.

Summary of the filing

MBG Investors I, L.P. and Antonio del Valle Perochena filed a joint filing agreement as an exhibit to an amended Schedule 13G regarding their beneficial ownership of Byline Bancorp, Inc. common stock.

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Key details

Reporting person / beneficial ownerMBG Investors I, L.P.
Issuer of common stockByline Bancorp, Inc.
General partner of mbg investors i, l.p.Antonio del Valle Perochena

How BY stock reacted

Close before

$39.27

Aug 14, 2026

First close after

-0.31%

$39.15

5 trading days

-2.60%

$38.25

Since filing

-2.93%

$38.12

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Frequently asked questions

What did BY file with the SEC on Aug 17, 2026?

BY filed a SCHEDULE 13G/A (SEC filing). MBG Investors I, L.P. and Antonio del Valle Perochena filed a joint filing agreement as an exhibit to an amended Schedule 13G regarding their beneficial ownership of Byline Bancorp, Inc. common stock.

How do I read a SCHEDULE 13G/A?

A report the company filed with the SEC (the US market regulator). Start with the summary, then the key amounts and names. Compare it with the company’s earlier filings.

Why are SEC filings important?

Public companies must tell the SEC about anything that can change their value — results, leadership changes, big deals, new shares, bankruptcy. Filings are the official source, often before the news. A SCHEDULE 13G/A (schedule 13g/a): A report the company filed with the SEC (the US market regulator).

How did BY stock react to this filing?

BY closed at $39.27 before the filing and $39.15 on Aug 17, 2026 (-0.31%). Five trading days later: $38.25 (-2.60%).

Other BY SEC filings

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