Arq CFO buys 5,758 shares in open market

Arq’s CFO increased both his direct and LLC-held positions through open-market share purchases.

Rhea-AI Filing Summary

Arq, Inc. (ARQ) reported that Chief Financial Officer Shimon Steinmetz purchased a total of 5,758 shares of Common Stock on September 4, 2026 in open-market transactions. He acquired 1,402 shares directly and 4,356 shares through Steinmetz Advisory Group LLC, where he is an indirect beneficial owner and disclaims ownership beyond his pecuniary interest. No Rule 10b5-1 trading plan is reported.

Insider Trade Summary

Net Buyer: 5,758 shares

Net Buy 2 txns

Insider Steinmetz Shimon

Role Chief Financial Officer

Bought 5,758 shs ($13K)

Type	Security	Shares	Price	Value
Purchase	Common Stock F1	1,402	$2.2889	$3K
Purchase	Common Stock F2, F3	4,356	$2.2737	$10K

Holdings After Transaction: Common Stock — 351,925 shares (Direct); Common Stock — 13,126 shares (Indirect, By Steinmetz Advisory Group LLC)

Footnotes (3)

1. F1. This price is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $2.285 to $2.29, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this Form 4.
2. F2. This price is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $2.255 to $2.29, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this Form 4.
3. F3. The shares of Common Stock reported on this row are held by Steinmetz Advisory Group, LLC ("Steinmetz Advisory Group"). Mr. Steinmetz, the Chief Financial Officer of the Issuer, is the ultimate control person of Steinmetz Advisory Group, and an indirect beneficial owner of these shares. Mr. Steinmetz disclaims beneficial ownership of these shares except to the extent of his pecuniary interest therein.

Key Figures

Direct shares purchased: 1,402 shares Direct purchase price: $2.2889 per share Indirect shares purchased: 4,356 shares +4 more

7 metrics

Direct shares purchased 1,402 shares Common Stock bought directly on September 4, 2026

Direct purchase price $2.2889 per share Weighted average price for 1,402 directly purchased shares

Indirect shares purchased 4,356 shares Common Stock bought via Steinmetz Advisory Group LLC on September 4, 2026

Indirect purchase price $2.2737 per share Weighted average price for 4,356 LLC-held shares

Total shares purchased 5,758 shares Aggregate of both reported purchases on September 4, 2026

Direct holdings after transaction 351,925 shares Arq Common Stock directly held by Shimon Steinmetz after purchases

Indirect holdings after transaction 13,126 shares Arq Common Stock held by Steinmetz Advisory Group LLC after purchases

Key Terms

weighted average price, indirect beneficial owner, pecuniary interest, Common Stock

4 terms

weighted average price financial

"This price is a weighted average price. These shares were purchased"

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

indirect beneficial owner financial

"Mr. Steinmetz ... is the ultimate control person ... and an indirect beneficial owner"

pecuniary interest financial

"Mr. Steinmetz disclaims beneficial ownership of these shares except to the extent of his pecuniary interest"

Common Stock financial

"The shares of Common Stock reported on this row are held by"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

FAQ

What insider transactions did ARQ’s CFO report on this Form 4?

Arq’s CFO, Shimon Steinmetz, reported two open-market purchases of Common Stock on September 4, 2026, totaling 5,758 shares, split between directly held shares and shares held through Steinmetz Advisory Group LLC.

How many ARQ shares did the CFO buy directly and at what price?

He bought 1,402 shares of Arq Common Stock directly at a weighted average price of $2.2889 per share, with trades executed in a price range from $2.285 to $2.29 on September 4, 2026.

How many ARQ shares did Steinmetz Advisory Group LLC purchase and at what price?

Steinmetz Advisory Group LLC purchased 4,356 shares of Arq Common Stock at a weighted average price of $2.2737 per share, in a price range from $2.255 to $2.29 on September 4, 2026.

What are the CFO’s direct and indirect ARQ share holdings after these trades?

After these trades, Shimon Steinmetz directly holds 351,925 shares of Arq Common Stock and is an indirect beneficial owner of 13,126 shares held by Steinmetz Advisory Group LLC, subject to his disclaimer of beneficial ownership beyond his pecuniary interest.

Were the ARQ insider purchases made under a Rule 10b5-1 trading plan?

No. The filing indicates that no Rule 10b5-1 trading plan is reported for these transactions, meaning the purchases are not affirmatively stated to have been made under a pre-arranged trading plan.

Who holds the indirectly owned ARQ shares reported on this Form 4?

The indirectly owned shares are held by Steinmetz Advisory Group LLC. Shimon Steinmetz is the ultimate control person and an indirect beneficial owner but disclaims beneficial ownership of these shares except to the extent of his pecuniary interest.

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

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Available on EDGAR 09/09/2026 - 05:33 PM Accepted by SEC EDGAR 09/09/2026 - 05:32 PM Learn about SEC filing dates

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^*

Steinmetz Shimon

(Last) (First) (Middle)

8051 E. MAPLEWOOD AVE.

STE. 210

(Street)

GREENWOOD VILLAGE COLORADO 80111

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Arq, Inc. [ ARQ ]

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/04/2026

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

X	Form filed by One Reporting Person
	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	09/04/2026		P		1,402	A	$2.2889(1)	351,925	D
Common Stock	09/04/2026		P		4,356	A	$2.2737(2)	13,126	I	By Steinmetz Advisory Group LLC(3)

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

Explanation of Responses:

1. This price is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $2.285 to $2.29, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this Form 4.

2. This price is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $2.255 to $2.29, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this Form 4.

3. The shares of Common Stock reported on this row are held by Steinmetz Advisory Group, LLC ("Steinmetz Advisory Group"). Mr. Steinmetz, the Chief Financial Officer of the Issuer, is the ultimate control person of Steinmetz Advisory Group, and an indirect beneficial owner of these shares. Mr. Steinmetz disclaims beneficial ownership of these shares except to the extent of his pecuniary interest therein.

Remarks:

	/s/ Shimon Steinmetz	09/09/2026
	** 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)