Company · BY · CIK 1702750

Byline Bancorp, Inc. (BY) SEC filings and CIK.

BY’s SEC Central Index Key (CIK) is 0001702750, or 1702750 without leading zeros. The SEC’s ticker file lists it as BYLINE BANCORP, INC..

Ticker: BY
CIK: 0001702750
Other tickers: None
Insider transactions, Q3 2026: 8

Insider trading

In Q3 2026, insiders at Byline Bancorp, Inc. reported 8 non-derivative transactions on 7 Forms 3, 4 and 5, including 2 open-market purchases and 4 sales. See every BY insider transaction →

Recent filings we observed

No filings for this CIK appear in our current observation window. The full history is available from the filings endpoint below and on SEC.gov.

Get BY SEC data through the API

Filing history

curl "https://sec-api.dev/api/v1/filings?cik=1702750&limit=10" \
  -H "Authorization: Bearer $SEC_API_KEY"

Company profile

curl "https://sec-api.dev/api/v1/companies/1702750" \
  -H "Authorization: Bearer $SEC_API_KEY"

Reported XBRL facts

curl "https://sec-api.dev/api/v1/facts/1702750?taxonomy=us-gaap&concept=Revenues&limit=10" \
  -H "Authorization: Bearer $SEC_API_KEY"

Ticker to CIK API · SEC filings API · Byline Bancorp, Inc. on SEC.gov

Questions

What is BY’s CIK number?

BY’s SEC Central Index Key (CIK) is 0001702750, or 1702750 without leading zeros. The SEC’s ticker file lists it as BYLINE BANCORP, INC..

How do I find Byline Bancorp, Inc.’s 10-K?

Request /api/v1/filings?cik=1702750&form=10-K, or open the company’s EDGAR page and filter by 10-K. Foreign issuers file 20-F or 40-F instead.

Ticker and CIK: SEC company_tickers.json, cached 2026-11-02. Tickers can move between entities; the CIK identifies the filer.

Plain-text version for agents and LLMs: /companies/by.md

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