SCHEDULE 13G/A

SYNALLOY CORP

Common Stock · CUSIP: 871565107

Event date: 2026-09-30

Reporting persons may disclose overlapping interests. Their amounts are shown individually and are not added into a filing total.

Filing-level shares

Unavailable

Percent of class

Unavailable

• Mink Brook Partners LP

  Shares: 619,692.00 · Class: 6.9%

• Mink Brook Opportunity Fund LP

  Shares: 278,413.00 · Class: 3.1%

• Mink Brook Capital GP LLC

  Shares: 898,105.00 · Class: 9.9%

• William Mueller

  Shares: 898,105.00 · Class: 9.9%

• Mink Brook Asset Management LLC

  Shares: 898,105.00 · Class: 9.9%

Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.