Daniel M. Friedberg - 31 May 2026 Form 4 Insider Report for Quest Resource Holding Corp (QRHC)

Reporting relationship: Director, 10%+ Owner
Issuer ticker: QRHC
Reported as of: 31 May 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 02 Jun 2026, 19:40:45 UTC
Prior SEC filing: 04 May 2026
Source filing: View source filing
Reporting owner signature: /s/ Daniel Friedberg

Key filing fact

Daniel M. Friedberg filed Form 4 for Quest Resource Holding Corp (QRHC) on 02 Jun 2026.

Key facts

This page summarizes Daniel M. Friedberg's Form 4 filing for Quest Resource Holding Corp (QRHC).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 02 Jun 2026, 19:40.

Change

Previous filing in this sequence was filed on 04 May 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (3)

CIK 0001448795 Primary reporting owner

FRIEDBERG DANIEL M.

Relationship: Director, 10%+ Owner
Address: C/O QUEST RESOURCE HOLDING CORPORATION, 433 E. LAS COLINAS BOULEVARD, SUITE 675, IRVING
Signature: /s/ Daniel Friedberg
Signature date: 02 Jun 2026

CIK 0001773816

Hampstead Park Capital Management, LLC

Relationship: 10%+ Owner
Address: 6 LIGHTHOUSE LANE, OLD GREENWICH
Signature: Hampstead Park Capital Management, LLC; By: /s/ Daniel Friedberg, Chief Executive Officer
Signature date: 02 Jun 2026

CIK 0001773840

Hampstead Park Environmental Services Investment Fund LLC

Relationship: 10%+ Owner
Address: 6 LIGHTHOUSE LANE, OLD GREENWICH
Signature: Hampstead Park Environmental Services Investment Fund LLC; By: Hampstead Park Capital Management, LLC; By: /s/ Daniel Friedberg, Chief Executive Officer
Signature date: 02 Jun 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

QRHC transaction

Common Stock

Award

Transaction value
Shares: +23,661
Change %: +48%
Price: $1.18^*
Shares after: 72,746
Date: 31 May 2026
Ownership: Direct
Footnotes: F1, F2

QRHC transaction

Common Stock

Award

Transaction value
Shares: +23,661
Change %: +48%
Price: $1.18^*
Shares after: 72,746
Date: 31 May 2026
Ownership: Direct
Footnotes: F1, F2

QRHC transaction

Common Stock

Award

Transaction value
Shares: +23,661
Change %: +48%
Price: $1.18^*
Shares after: 72,746
Date: 31 May 2026
Ownership: Direct
Footnotes: F1, F2

QRHC holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 97,068
Date: 31 May 2026
Ownership: Direct
Footnotes: F3

QRHC holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 97,068
Date: 31 May 2026
Ownership: Direct
Footnotes: F3

QRHC holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 97,068
Date: 31 May 2026
Ownership: Direct
Footnotes: F3

QRHC holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 2,842,353
Date: 31 May 2026
Ownership: By: Hampstead Park Environmental Services Investment Fund LLC
Footnotes: F4

QRHC holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 2,842,353
Date: 31 May 2026
Ownership: By: Hampstead Park Environmental Services Investment Fund LLC
Footnotes: F4

QRHC holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 2,842,353
Date: 31 May 2026
Ownership: By: Hampstead Park Environmental Services Investment Fund LLC
Footnotes: F4

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 4 footnotes

Footnote F1

These reported securities represent restricted stock units ("RSUs") granted on May 31, 2026 under the Issuer's 2024 Incentive Compensation Plan. Each RSU represents a contingent right to receive one share of common stock upon vesting. The RSUs are scheduled to vest on May 31, 2027.

Footnote F2

Includes (a) 23,661 RSUs that are scheduled to fully vest on May 31, 2027, (b) 20,000 RSUs that are scheduled to fully vest on August 13, 2026 and (c) 29,085 shares of common stock beneficially owned by Mr. Friedberg.

Footnote F3

The reported securities include (a) 18,153 deferred stock units ("DSUs") granted under the Issuer's 2012 Incentive Compensation Plan and (b) 78,915 DSUs granted under the Issuer's 2024 Incentive Compensation Plan. The shares of common stock underlying such DSUs shall be issued upon Mr. Friedberg's separation from service with the Issuer.

Footnote F4

This Form 4 is filed jointly by Hampstead Park Environmental Services Investment Fund LLC ("Hampstead Park Environmental"), Daniel Friedberg and Hampstead Park Capital Management, LLC ("Hampstead Park Capital"). Hampstead Park Capital is the sole member of Hampstead Park Environmental, and Mr. Friedberg is the Chief Executive Officer of Hampstead Park Capital; each may therefore be deemed to control Hampstead Park Environmental. In addition, Mr. Friedberg is a Director of the Issuer.

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