Byline Bancorp, Inc.
Byline Bancorp, Inc. (BY) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · BY · as of Mar 31, 2025
Ownership Breakdown
149
Institutional Holders
▲ 8 vs Q4
$528.14M
Total Inst. Value
▼ $52.74M vs Q4
45.41M
Shares Outstanding
freeFloat 71.01%
20.20M
13F Shares Held
▲ 160,560 vs Q4
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
BY largest shareholders · institutional ownership
Q1 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
BLACKROCK, INC. state commercial banks | 2.81M | 6.41% | 6.41% | $73.48B | May 2, 2025 | ▼ 2.9K |
DIMENSIONAL FUND ADVISORS LP state commercial banks | 2.20M | 5.03% | 5.03% | $57.65B | May 13, 2025 | ▲ 74.7K |
VANGUARD GROUP INC state commercial banks | 1.56M | 3.56% | 3.56% | $40.74B | May 9, 2025 | ▼ 6.3K |
FMR LLC state commercial banks | 1.06M | 2.43% | 2.43% | $27.82B | May 12, 2025 | ▲ 15.9K |
ARISTOTLE CAPITAL BOSTON, LLC state commercial banks | 944.4K | 2.16% | 2.16% | $24.70B | May 15, 2025 | ▼ 161.3K |
STATE STREET CORP state commercial banks | 815.6K | 1.86% | 1.86% | $21.34B | May 15, 2025 | ▼ 98.2K |
ARARAT CAPITAL MANAGEMENT LP state commercial banks | 806.5K | 1.84% | 1.84% | $21.10B | May 15, 2025 | ▲ 4.6K |
BOSTON PARTNERS state commercial banks | 718.6K | 1.64% | 1.64% | $18.64B | May 13, 2025 | ▼ 3.6K |
AMERICAN CENTURY COMPANIES INC state commercial banks | 690.3K | 1.58% | 1.58% | $18.06B | May 13, 2025 | ▲ 55.9K |
GEODE CAPITAL MANAGEMENT, LLC state commercial banks | 655.3K | 1.50% | 1.50% | $17.15B | May 13, 2025 | ▲ 13.9K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q1 2025 vs prior quarter
Q1 2025
21
Increased
+609.0K shares2
New Positions
first time holders24
Decreased
−771.4K shares0
Sold Out
fully exitedNet shares change (top 50)
162.4K
+609.0K / −771.4K
Net new holders
-1
2 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
BY insider trading · insider activity
Source: SEC Form 4
Insiders have been net buyers of shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
2
Buy transactions
0
Sell transactions
0.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
KISTNER WILLIAM G director | May 4, 2026 | Purchase | 100 | $31.97 | $3.2K | 14.2K | Form 4 ↗ |
ABRAHAM THOMAS PRESIDENT, SBC | Apr 16, 2026 | Award | 2,406 | — | — | 45.5K | Form 4 ↗ |
HERSETH MARY JO S. director | Mar 16, 2026 | Purchase | 300 | $30.83 | $9.2K | 18.8K | Form 4 ↗ |
Barkidjija John HEAD OF CRE & SPECIALTY FIN | Feb 26, 2026 | Sale | 4,509 | $32.33 | $145.8K | 19.2K | Form 4 ↗ |
Mando Nicolas CHIEF TECHNOLOGY & OPERATIONS | Feb 22, 2026 | Award | 1,704 | — | — | 16.2K | Form 4 ↗ |
Mando Nicolas CHIEF TECHNOLOGY & OPERATIONS | Feb 22, 2026 | Tax Withhold | 636 | $33.13 | $21.1K | 15.6K | Form 4 ↗ |
Mando Nicolas CHIEF TECHNOLOGY & OPERATIONS | Feb 22, 2026 | Award | 2,231 | — | — | 15.3K | Form 4 ↗ |
Mando Nicolas CHIEF TECHNOLOGY & OPERATIONS | Feb 22, 2026 | Tax Withhold | 772 | $33.13 | $25.6K | 14.5K | Form 4 ↗ |
Fucinato Mark CHIEF CREDIT OFFICER | Feb 22, 2026 | Award | 2,293 | — | — | 25.6K | Form 4 ↗ |
Fucinato Mark CHIEF CREDIT OFFICER | Feb 22, 2026 | Award | 3,948 | — | — | 24.7K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Byline Bancorp, Inc. (BY) is primarily owned by institutional investors, who hold approximately 44.5% of total shares outstanding. Company insiders own approximately 28.99%, while retail and public investors account for the remaining 26.53%.
The largest institutional shareholder of Byline Bancorp, Inc. is BLACKROCK, INC., holding approximately 2.81 million shares — equal to 6.41% of outstanding shares — as of March 31, 2025.
A total of 149 institutional investors currently hold BY stock, with a combined institutional value of approximately $528,142,885 as of the most recent 13F filing period.
Frequently asked questions
BY ownershipByline Bancorp, Inc. (BY) is primarily owned by institutional investors, who hold approximately 44.5% of shares. The largest shareholder is BLACKROCK, INC. with a 6.41% stake. Company insiders hold 28.99%. Data sourced from SEC Form 13F as of March 31, 2025.