BY · Insider trading · 13F holders · Congress trades
Byline Bancorp, Inc. (BY)
Who is buying and selling BY: company insiders on SEC Form 4, hedge funds and superinvestors on Form 13F, and members of Congress under the STOCK Act. Every figure links to the filing or page it comes from.
- 13F filers holding
- 8
- Insider buys, 90 days
- $60K
- Insider sales, 90 days
- $24.3M
- Congress trades, 12 months
- 0
BY at a glance
- Between Aug 1, 2026 and Oct 29, 2026, 7 BY insiders filed 3 open-market purchases worth $60K and 4 sales worth $24.3M on SEC Form 4.
- 8 13F filers hold BY among their 50 largest positions, worth $131.0M combined. The biggest bets by portfolio weight are Ararat Capital Management LP (8.7%), GFS Advisors, LLC (8.1%) and Endeavour Capital Advisors Inc (1.8%). In their latest 13Fs, 0 managers opened a new position and 1 added to one.
- No member of Congress has disclosed a trade in BY.
- BY last closed at $38.96 on Oct 29, 2026.
BY insider trading
Between Aug 1, 2026 and Oct 29, 2026, 7 BY insiders filed 3 open-market purchases worth $60K and 4 sales worth $24.3M on SEC Form 4.
| Filed | Insider | Role | Trade | Shares | Price | Value | Form 4 |
|---|---|---|---|---|---|---|---|
| Oct 26, 2026 | Stewart Pamela C | Director | Buy | 1,160 | $38.61 | $45K | SEC |
| Aug 20, 2026 | Herseth Mary Jo S. | Director | Buy | 300 | $38.40 | $12K | SEC |
| Aug 20, 2026 | Kistner William G | Director | Buy | 100 | $38.30 | $4K | SEC |
| Aug 14, 2026 | Herencia Roberto R | CHIEF EXECUTIVE OFFICER, Director | Sale | 19,750 | $39.21 | $774K | SEC |
| Aug 12, 2026 | Rose Dana | CHIEF HUMAN RESOURCES OFFICER | Sale | 2,421 | $39.00 | $94K | SEC |
| Aug 11, 2026 | Mbg Investors I, L.P. | 10% Owner | Sale | 300,000 | $39.10 | $11.7M | SEC |
| Aug 11, 2026 | Del Valle Perochena Antonio | Director, 10% Owner | Sale | 300,000 | $39.10 | $11.7M | SEC |
Who owns BY? Hedge funds and superinvestors
8 13F filers hold BY among their 50 largest positions, worth $131.0M combined. The biggest bets by portfolio weight are Ararat Capital Management LP (8.7%), GFS Advisors, LLC (8.1%) and Endeavour Capital Advisors Inc (1.8%). In their latest 13Fs, 0 managers opened a new position and 1 added to one.
| Manager | % of portfolio | Value | Shares | Last quarter | 13F |
|---|---|---|---|---|---|
| GFS Advisors, LLCAsset manager | 8.1% | $76.8M | 55 | — | Q2 2026 |
| Ararat Capital Management LPHedge fund | 8.7% | $18.5M | 490,609 | -21.3% shares | Q2 2026 |
| Endeavour Capital Advisors IncHedge fund | 1.8% | $9.0M | 238,671 | +32.1% shares | Q2 2026 |
| Denali Advisors LLCInstitutional asset manager | 0.7% | $7.0M | 185,516 | — | Q2 2026 |
| Detalus Advisors, LLCInstitutional asset manager | 1.2% | $6.0M | 163,050 | -16.8% shares | Q3 2026 |
| Maltese Capital Management LLCHedge fund | 0.9% | $4.9M | 130,000 | -41.1% shares | Q2 2026 |
| Mendon Capital Advisors CorpMutual fund manager | 1.7% | $4.7M | 125,000 | +0.0% shares | Q2 2026 |
| Fiducient Advisors LLCInstitutional asset manager | 0.6% | $4.2M | 110,850 | -3.0% shares | Q2 2026 |
Each manager counts with its latest 13F (Q3 2026: 1, Q2 2026: 7). Screen BY in the grand portfolio →
BY stock trades by members of Congress
No member of Congress has disclosed a trade in BY.
BY questions and answers
Are insiders buying BY stock?
Between Aug 1, 2026 and Oct 29, 2026, 7 BY insiders filed 3 open-market purchases worth $60K and 4 sales worth $24.3M on SEC Form 4.
Which hedge funds own BY?
8 13F filers hold BY among their 50 largest positions, worth $131.0M combined. The biggest bets by portfolio weight are Ararat Capital Management LP (8.7%), GFS Advisors, LLC (8.1%) and Endeavour Capital Advisors Inc (1.8%). In their latest 13Fs, 0 managers opened a new position and 1 added to one.
Has Congress traded BY?
No member of Congress has disclosed a trade in BY.
Who is the largest holder of BY?
Among 13F filers, GFS Advisors, LLC reports the largest BY position, $76.8M (55 shares) in its Q2 2026 13F. The biggest bet by portfolio weight is Ararat Capital Management LP's: 8.7% of its portfolio.
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