Quest Resource grants Friedberg 25,614 stock units

The reported equity details also include deferred stock units whose underlying shares are issuable upon separation from service.

Available on EDGAR 11/03/2026 - 04:50 PM EST Accepted by SEC EDGAR 11/03/2026 - 04:49 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

Daniel M. Friedberg, a director and 10% owner of Quest Resource Holding Corp. (QRHC), acquired 25,614 restricted stock units (RSUs) on October 31, 2026, reported at $1.09 per share. Granted under the company’s 2024 Incentive Compensation Plan, each RSU represents a contingent right to receive one common share upon vesting; the award is scheduled to vest on March 1, 2027.

Hampstead Park Environmental Services Investment Fund LLC reported indirect ownership of 2,842,353 common shares. Hampstead Park Capital Management, LLC is the fund’s sole member, and Friedberg is its CEO; the footnote says each may therefore be deemed to control the fund.

Insider Trade Summary

Grant/Award: 25,614 shares

Grant/Award 1 txn

Insider FRIEDBERG DANIEL M., Hampstead Park Capital Management, LLC, Hampstead Park Environmental Services Investment Fund LLC

Role Director, 10% Owner | 10% Owner | 10% Owner

Type	Security	Shares	Price	Value
Grant/Award	Common Stock F1, F2	25,614	$1.09	$28K
Holding	Common Stock F3	--	--	--
Holding	Common Stock F4	--	--	--

Holdings After Transaction: Common Stock — 308,808 shares (Direct); Common Stock — 2,842,353 shares (Indirect, By: Hampstead Park Environmental Services Investment Fund LLC)

Footnotes (4)

1. F1. These reported securities represent restricted stock units ("RSUs") granted on October 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 March 1, 2027.
2. F2. Includes (a) 133,888 RSUs that are scheduled to fully vest on March 1, 2027, (b) 28,767 RSUs that are scheduled to fully vest on August 13, 2027 and (c) 49,085 shares of common stock beneficially owned by Mr. Friedberg.
3. 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.
4. 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.

Key Figures

RSUs acquired: 25,614 RSUs Reported price per share: $1.09 per share RSUs scheduled to fully vest: 133,888 RSUs +5 more

8 metrics

RSUs acquired 25,614 RSUs October 31, 2026

Reported price per share $1.09 per share RSU acquisition on October 31, 2026

RSUs scheduled to fully vest 133,888 RSUs March 1, 2027

RSUs scheduled to fully vest 28,767 RSUs August 13, 2027

Common shares beneficially owned by Daniel M. Friedberg 49,085 shares Listed in the reported position note

Deferred stock units under the 2012 Incentive Compensation Plan 18,153 DSUs Underlying shares to be issued upon separation from service

Deferred stock units under the 2024 Incentive Compensation Plan 78,915 DSUs Underlying shares to be issued upon separation from service

Common shares held indirectly by Hampstead Park Environmental Services Investment Fund LLC 2,842,353 shares Reported October 31, 2026

Key Terms

restricted stock units (RSUs), deferred stock units (DSUs), contingent right, beneficially owned

4 terms

restricted stock units (RSUs) financial

"These reported securities represent restricted stock units ("RSUs")"

Restricted stock units (RSUs) are a type of company promise to give employees shares of stock in the future, usually after certain conditions like working for a set time. They are like a gift promised today that you receive later, which can become valuable if the company's stock price goes up. RSUs matter because they are a way companies reward employees and can be a significant part of compensation.

deferred stock units (DSUs) financial

"The reported securities include (a) 18,153 deferred stock units ("DSUs")"

Deferred stock units (DSUs) are a form of long-term pay that promises an employee or director future company shares or cash equal to the share value at a later date, usually after leaving the company or at a set vesting time. Think of them as a delayed paycheck tied to the stock: they align recipients’ interests with long-term share performance and matter to investors because they create potential future dilution and signal how management is rewarded and incentivized.

contingent right financial

"Each RSU represents a contingent right to receive one share"

beneficially owned regulatory

"49,085 shares of common stock beneficially owned by Mr. Friedberg"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many QRHC shares does Hampstead Park Environmental Services Investment Fund LLC hold?

Hampstead Park Environmental Services Investment Fund LLC reported indirect ownership of 2,842,353 common shares. Hampstead Park Capital Management, LLC is the fund’s sole member, and Daniel M. Friedberg is its CEO; the footnote says each may therefore be deemed to control the fund.

When are Daniel M. Friedberg’s other QRHC RSUs scheduled to vest?

The reported position note lists 133,888 RSUs scheduled to fully vest on March 1, 2027, and 28,767 RSUs scheduled to fully vest on August 13, 2027.

When are shares underlying Daniel M. Friedberg’s QRHC deferred stock units issued?

The reported position includes 18,153 deferred stock units granted under the 2012 Incentive Compensation Plan and 78,915 deferred stock units granted under the 2024 Incentive Compensation Plan. The underlying common shares are to be issued upon Friedberg’s separation from service with the company.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

FRIEDBERG DANIEL M.

(Last) (First) (Middle)

C/O QUEST RESOURCE HOLDING CORPORATION

433 E. LAS COLINAS BOULEVARD, SUITE 675

(Street)

IRVING TEXAS 75039

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Quest Resource Holding Corp [ QRHC ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
10/31/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

	Form filed by One Reporting Person
X	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	10/31/2026		A		25,614(1)	A	$1.09	211,740(2)	D
Common Stock								97,068(3)	D
Common Stock								2,842,353	I	By: Hampstead Park Environmental Services Investment Fund LLC(4)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

1. Name and Address of Reporting Person^*

FRIEDBERG DANIEL M.

(Last) (First) (Middle)

C/O QUEST RESOURCE HOLDING CORPORATION

433 E. LAS COLINAS BOULEVARD, SUITE 675

(Street)

IRVING TEXAS 75039

(City) (State) (Zip)

UNITED STATES

(Country)

Relationship of Reporting Person(s) to Issuer

X	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

1. Name and Address of Reporting Person^*

Hampstead Park Capital Management, LLC

(Last) (First) (Middle)

6 LIGHTHOUSE LANE

(Street)

OLD GREENWICH CONNECTICUT 06870

(City) (State) (Zip)

UNITED STATES

(Country)

Relationship of Reporting Person(s) to Issuer

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

1. Name and Address of Reporting Person^*

Hampstead Park Environmental Services Investment Fund LLC

(Last) (First) (Middle)

6 LIGHTHOUSE LANE

(Street)

OLD GREENWICH CONNECTICUT 06870

(City) (State) (Zip)

UNITED STATES

(Country)

Relationship of Reporting Person(s) to Issuer

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

Explanation of Responses:

1. These reported securities represent restricted stock units ("RSUs") granted on October 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 March 1, 2027.

2. Includes (a) 133,888 RSUs that are scheduled to fully vest on March 1, 2027, (b) 28,767 RSUs that are scheduled to fully vest on August 13, 2027 and (c) 49,085 shares of common stock beneficially owned by Mr. Friedberg.

3. 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.

4. 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.

	/s/ Daniel Friedberg	11/03/2026
	Hampstead Park Capital Management, LLC; By: /s/ Daniel Friedberg, Chief Executive Officer	11/03/2026
	Hampstead Park Environmental Services Investment Fund LLC; By: Hampstead Park Capital Management, LLC; By: /s/ Daniel Friedberg, Chief Executive Officer	11/03/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)