Insider Transactions Reported by 13 Insiders of Haymaker Acquisition Corp. 4

Symbol: HYAC, HYAC-UN, HYAC-WT on NYSE
Location: New York, NY

Quick Takeaways

HYAC - Haymaker Acquisition Corp. 4 has 13 insiders with reported activity on this page.
No net insider buy/sell flow is currently reported for the last year.
Recent transaction rows are available for direct filing-level review.

What Changed

No meaningful buy/sell imbalance is currently visible in the one-year window.
Activity will update as new Forms 3/4/5 are filed.

Why This Matters

This page gives a plain-language issuer insider context before you inspect transaction-level evidence.
Use the filing links below to verify timestamps, codes, and ownership impacts directly from SEC forms.

Official SEC Source

Filed on Form 4

Issuer insider activity is sourced from SEC Forms 3, 4, and 5.

See Original Filing

Insider trading overview

Last 12 months

Insider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 09 Apr 2025.

Buys

Shares: 0

Insiders: 0

Sells

Shares: 0

Insiders: 0

Net

Shares: 0

Insiders: 0

Window (months)	Buy $	Sell $	Net $
0-3	$0	$0	$0
3-6	$0	$0	$0
6-9	$0	$0	$0
9-12	$0	$0	$0

Haymaker Acquisition Corp. 4 executives and other stock owners filed with the SEC include:

Name	Relationship	Holdings Value	Valuation	Report Date
Frederick Vincent Fortmiller Jr.	10%+ Owner	$55,796,014	Median	08 Apr 2026
Harraden Circle Investors GP, LLC	10%+ Owner	$55,796,014	Median	08 Apr 2026
Harraden Circle Investors, LP	10%+ Owner	$55,796,014	Median	08 Apr 2026
Harraden Circle Special Opportunities, LP	10%+ Owner	$55,796,014	Median	08 Apr 2026
Harraden Circle Strategic Investments, LP	10%+ Owner	$55,796,014	Median	08 Apr 2026
Harraden Circle Concentrated, LP	10%+ Owner	$55,796,014	Median	08 Apr 2026
Harraden Circle Investments, LLC	10%+ Owner	$55,796,014	Median	08 Apr 2026
Harraden Circle Investors GP, LP	10%+ Owner	$55,796,014	Median	08 Apr 2026
Roger Meltzer	Director		Mixed	25 Jul 2023
Walter Field McLallen	Director		Mixed	25 Jul 2023
Christopher Bradley	Chief Financial Officer		Mixed	25 Jul 2023
Brian Shimko	Director		Mixed	25 Jul 2023
Haymaker Sponsor IV LLC	10%+ Owner		Mixed	25 Jul 2023

Top shareholders of Haymaker Acquisition Corp. 4 (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.

Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Holder	Source	Role / Reporting	Ownership %	Shares	Holdings Value	12M Net Δ	As of	Details
Harraden Circle Investments, LLC	13D/G 3/4/5 13F	10%+ Owner · Company	21%	4,902,989	$56,335,344	+$32,955,044	08 Apr 2026	13D/G 3/4/5 13F
Frederick Vincent Fortmiller Jr.	3/4/5	10%+ Owner	21%	4,902,989	$55,796,014	—	08 Apr 2026	3/4/5
Harraden Circle Concentrated, LP	3/4/5	10%+ Owner	21%	4,902,989	$55,796,014	—	08 Apr 2026	3/4/5
Harraden Circle Investors GP, LLC	3/4/5	10%+ Owner	21%	4,902,989	$55,796,014	—	08 Apr 2026	3/4/5
Harraden Circle Investors GP, LP	3/4/5	10%+ Owner	21%	4,902,989	$55,796,014	—	08 Apr 2026	3/4/5
Harraden Circle Investors, LP	3/4/5	10%+ Owner	21%	4,902,989	$55,796,014	—	08 Apr 2026	3/4/5
Harraden Circle Special Opportunities, LP	3/4/5	10%+ Owner	21%	4,902,989	$55,796,014	—	08 Apr 2026	3/4/5
Harraden Circle Strategic Investments, LP	3/4/5	10%+ Owner	21%	4,902,989	$55,796,014	—	08 Apr 2026	3/4/5
AMERICAN CENTURY INVESTMENT MANAGEMENT INC	13D/G	—	12%	2,707,667	$31,111,094	$0	31 Mar 2026	13D/G
Fort Baker Capital Management LP	13F 13D/G	Company	9% from 13D/G	2,337,220	$26,597,564	—	31 Dec 2025	13F 13D/G
BERKLEY W R CORP	13F 13D/G	Company · W. R. Berkley Corporation	8.4% from 13D/G	1,964,207	$22,352,676	—	31 Dec 2025	13F 13D/G
Westchester Capital Management, LLC	13F 13D/G	Company	8.2% from 13D/G	1,939,028	$22,066,139	—	31 Dec 2025	13F 13D/G
Wealthspring Capital LLC	13F	Company	7.1%	1,657,453	$18,861,815	—	31 Dec 2025	13F
First Trust Capital Management L.P.	13D/G 13F	Company	6.3%	1,477,308	$16,752,673	$0	30 Sep 2025	13D/G 13F
WOLVERINE ASSET MANAGEMENT LLC	13F 13D/G	Company	6.2% from 13D/G	1,459,677	$16,611,124	—	31 Dec 2025	13F 13D/G
MIZUHO FINANCIAL GROUP INC	13D/G	—	5.3%	1,249,126	$14,215,054	$0	31 Dec 2025	13D/G
MIZUHO SECURITIES USA LLC	13F	Company	5.3%	1,249,126	$14,069,455	—	31 Dec 2025	13F
LINDEN ADVISORS LP	13F	Company	3.8%	900,000	$10,242,000	—	31 Dec 2025	13F
MMCAP International Inc. SPC	13F	Company	3.8%	900,000	$10,242,000	—	31 Dec 2025	13F
GLAZER CAPITAL, LLC	13F	Company	3.1%	724,700	$8,247,000	—	31 Dec 2025	13F
AQR Arbitrage LLC	13F	Company	2.9%	686,006	$7,806,748	—	31 Dec 2025	13F
D. E. Shaw & Co., Inc.	13F	Company	2.6%	603,700	$6,870,106	—	31 Dec 2025	13F
METEORA CAPITAL, LLC	13F	Company	2.5%	580,867	$6,610,266	—	31 Dec 2025	13F
WEXFORD CAPITAL LP	13F	Company	2.1%	500,000	$5,690,000	—	31 Dec 2025	13F
Polar Asset Management Partners Inc.	13F	Company	1.9%	435,000	$4,950,300	—	31 Dec 2025	13F
Alberta Investment Management Corp	13F	Company	1.7%	400,000	$4,552,000	—	31 Dec 2025	13F
Sandia Investment Management LP	13F	Company	1.5%	349,987	$3,982,852	—	31 Dec 2025	13F
HSBC HOLDINGS PLC	13F	Company	1.4%	330,900	$3,782,187	—	31 Dec 2025	13F
MOORE CAPITAL MANAGEMENT, LP	13F	Company	1.3%	300,000	$3,414,000	—	31 Dec 2025	13F
Quarry LP	13F	Company	1.3%	298,232	$3,393,880	—	31 Dec 2025	13F
ARISTEIA CAPITAL, L.L.C.	13F	Company	1.2%	292,506	$3,328,718	—	31 Dec 2025	13F
Shaolin Capital Management LLC	13F	Company	1.1%	250,000	$2,845,000	—	31 Dec 2025	13F
K2 PRINCIPAL FUND, L.P.	13F	Company	0.97%	226,442	$2,576,910	—	31 Dec 2025	13F
PERISCOPE CAPITAL INC.	13F	Company	0.88%	206,700	$2,352,246	—	31 Dec 2025	13F
DLD Asset Management, LP	13F	Company	0.87%	204,028	$2,321,839	—	31 Dec 2025	13F
DEUTSCHE BANK AG\	13F	Company	0.81%	190,000	$2,162,200	—	31 Dec 2025	13F
Mint Tower Capital Management B.V.	13F	Company	0.64%	150,000	$1,707,000	—	31 Dec 2025	13F
SUSQUEHANNA INTERNATIONAL GROUP, LLP	13F	Company	0.62%	144,159	$1,640,529	—	31 Dec 2025	13F
HEIGHTS CAPITAL MANAGEMENT, INC	13F	Company	0.52%	121,772	$1,385,765	—	31 Dec 2025	13F
Clear Street Group Inc.	13F	Company	0.49%	115,010	$1,308,814	—	31 Dec 2025	13F
TORONTO DOMINION BANK	13F	Company	0.44%	103,697	$1,180,072	—	31 Dec 2025	13F
Calamos Advisors LLC	13F	Company	0.43%	100,000	$1,138,000	—	31 Dec 2025	13F
JPMORGAN CHASE & CO	13F	Company	0.43%	100,000	$1,138,000	—	31 Dec 2025	13F
OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC)	13F	Company	0.43%	100,248	$1,135,810	—	31 Dec 2025	13F
Radcliffe Capital Management, L.P.	13F	Company	0.33%	76,631	$872,061	—	31 Dec 2025	13F
Hudson Bay Capital Management LP	13F	Company	0.32%	75,000	$853,500	—	31 Dec 2025	13F
RIVERNORTH CAPITAL MANAGEMENT, LLC	13F	Company	0.22%	50,684	$576,784	—	31 Dec 2025	13F
DELTEC ASSET MANAGEMENT LLC	13F	Company	0.21%	50,000	$569,000	—	31 Dec 2025	13F
LMR Partners LLP	13F	Company	0.21%	50,000	$569,000	—	31 Dec 2025	13F
GABELLI & Co INVESTMENT ADVISERS, INC.	13F	Company	0.17%	38,800	$441,544	—	31 Dec 2025	13F

Recent Insider Transactions by Companies or Individuals for Haymaker Acquisition Corp. 4

Showing up to 300 most recent insider transactions from the last 12 months.

Insider	Symbol	Class	Shares Owned	Date	Ownership
Harraden Circle Investments, LLC	HYAC	Class A	4,902,989	08 Apr 2026	See Remarks
Harraden Circle Investments, LLC	HYAC	Class A	4,902,989	08 Apr 2026	See Remarks
Harraden Circle Investments, LLC	HYAC	Class A	4,902,989	08 Apr 2026	See Remarks
Harraden Circle Investments, LLC	HYAC	Class A	4,902,989	08 Apr 2026	See Remarks
Harraden Circle Investments, LLC	HYAC	Class A	4,902,989	08 Apr 2026	See Remarks
Harraden Circle Investments, LLC	HYAC	Class A	4,902,989	08 Apr 2026	See Remarks
Harraden Circle Investments, LLC	HYAC	Class A	4,902,989	08 Apr 2026	See Remarks
Harraden Circle Investments, LLC	HYAC	Class A	4,902,989	08 Apr 2026	See Remarks

* An asterisk sign (*) next to the price indicates that the price is likely invalid.