🕵️ Haymaker Acquisition Corp. 4 ($HYAC)
SEC insider & ownership activity, last 12 months · CIK 1970509 · every row links its SEC filing
Insiders were quiet over the last 12 months – no open-market buys or sells. Westchester Capital Management, LLC added 5.0% → 8.2%. No red-flag 8-Ks in the window.
Insider flow
0 buyers, $0 (0 lots) · 0 sellers, $0 (0 lots)
No open-market insider transactions in the last 12 months.
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| MM Asset Management Inc. | 8.8% | Class A | 13G | Sep 17, 2026 | filing ↗ |
| Mmcap International Inc. SPC | 8.8% | Class A | 13G | Sep 17, 2026 | filing ↗ |
| Westchester Capital Management, LLC | 8.2% | 13G | Sep 30, 2025 | filing ↗ | |
| Virtus Investment Advisers, LLC | 7.9% | 13G | Sep 30, 2025 | filing ↗ | |
| The Merger Fund | 7.6% | 13G | Sep 30, 2025 | filing ↗ | |
| Wolverine Trading Partners, Inc. | 6.2% | 13G | Sep 30, 2025 | filing ↗ | |
| Wolverine Holdings, L.P. | 6.2% | 13G | Sep 30, 2025 | filing ↗ | |
| Linden Advisors LP | 6.1% | Class A | 13G | Sep 22, 2026 | filing ↗ |
| Siu Min Wong | 6.1% | Class A | 13G | Sep 22, 2026 | filing ↗ |
| Linden GP LLC | 5.9% | Class A | 13G | Sep 22, 2026 | filing ↗ |
| Linden Capital L.P. | 5.9% | Class A | 13G | Sep 22, 2026 | filing ↗ |
| Millennium Group Management LLC | 5.5% | Class A | 13G | Sep 17, 2026 | filing ↗ |
| Israel A. Englander | 5.5% | Class A | 13G | Sep 17, 2026 | filing ↗ |
| Millennium Management LLC | 5.5% | Class A | 13G | Sep 17, 2026 | filing ↗ |
Planned insider sales (Form 144)
No sale notices filed in the last 12 months.
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Other events (8.01) | Sep 18, 2026 | filing ↗ |
| financial statements and exhibits (9.01) | Sep 18, 2026 | filing ↗ |
| Material agreement (1.01) | Sep 16, 2026 | filing ↗ |
| Unregistered equity sale (3.02) | Sep 16, 2026 | filing ↗ |
| Charter/bylaw changes (5.03) | Sep 16, 2026 | filing ↗ |
| Other events (8.01) | Sep 16, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Sep 16, 2026 | filing ↗ |
| Material agreement (1.01) | Apr 8, 2026 | filing ↗ |
| Acquisition or disposition (2.01) | Apr 8, 2026 | filing ↗ |
| Unregistered equity sale (3.02) | Apr 8, 2026 | filing ↗ |
| Material Modifications to Rights of Security Holders (3.03) | Apr 8, 2026 | filing ↗ |
| Auditor change (4.01) | Apr 8, 2026 | filing ↗ |
| Change of control (5.01) | Apr 8, 2026 | filing ↗ |
| Officer/director changes (5.02) | Apr 8, 2026 | filing ↗ |
| Charter/bylaw changes (5.03) | Apr 8, 2026 | filing ↗ |
| Amendments to the Registrant's Code of Ethics (5.05) | Apr 8, 2026 | filing ↗ |
| Change in Shell Company Status (5.06) | Apr 8, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 8, 2026 | filing ↗ |
| Material agreement (1.01) | Apr 1, 2026 | filing ↗ |
| Shareholder vote (5.07) | Apr 1, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Apr 1, 2026 | filing ↗ |
| Material agreement (1.01) | Mar 26, 2026 | filing ↗ |
| Unregistered equity sale (3.02) | Mar 26, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Mar 26, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 26, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Mar 26, 2026 | filing ↗ |
| Material agreement (1.01) | Mar 24, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 24, 2026 | filing ↗ |
| Unregistered equity sale (3.02) | Mar 3, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Mar 3, 2026 | filing ↗ |