Arq CFO buys 2,972 shares in open market

Arq’s CFO increased his direct and indirect holdings with open-market stock purchases totaling 2,972 shares.

Rhea-AI Filing Summary

Arq, Inc. (ARQ) reported that its Chief Financial Officer, Shimon Steinmetz, purchased a total of 2,972 shares of common stock on September 8, 2026, in open-market transactions. He bought 1,098 shares directly and 1,874 shares through Steinmetz Advisory Group LLC at weighted average prices around $2.34 per share, with actual prices ranging from $2.3374 to $2.3415. Following these purchases, he holds 353,023 shares directly and 15,000 shares indirectly through the LLC, which he controls while disclaiming beneficial ownership beyond his pecuniary interest.

Insider Trade Summary

Net Buyer: 2,972 shares

Net Buy 2 txns

Insider Steinmetz Shimon

Role Chief Financial Officer

Bought 2,972 shs ($7K)

Type	Security	Shares	Price	Value
Purchase	Common Stock F1	1,098	$2.3396	$3K
Purchase	Common Stock F1, F2	1,874	$2.3393	$4K

Holdings After Transaction: Common Stock — 353,023 shares (Direct); Common Stock — 15,000 shares (Indirect, By Steinmetz Advisory Group LLC)

Footnotes (2)

1. F1. This price is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $2.3374 to $2.3415, 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. 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: 1,098 shares Indirect shares purchased: 1,874 shares Total shares purchased: 2,972 shares +5 more

8 metrics

Direct shares purchased 1,098 shares Common stock bought directly by the CFO on September 8, 2026

Indirect shares purchased 1,874 shares Common stock bought through Steinmetz Advisory Group LLC on September 8, 2026

Total shares purchased 2,972 shares Aggregate of direct and indirect purchases on September 8, 2026

Weighted average price (direct purchase) $2.3396 per share Direct common stock purchase by the CFO

Weighted average price (indirect purchase) $2.3393 per share Purchase by Steinmetz Advisory Group LLC

Price range of trades $2.3374–$2.3415 per share Range for the multiple transactions included in the weighted averages

Direct holdings after transaction 353,023 shares Arq common stock held directly by the CFO after the purchases

Indirect holdings after transaction 15,000 shares Arq common stock held through Steinmetz Advisory Group LLC after the purchases

Key Terms

weighted average price, indirect beneficial owner, pecuniary interest

3 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

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

FAQ

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

What insider transactions did Arq (ARQ) disclose in this Form 4?

Arq disclosed that its Chief Financial Officer, Shimon Steinmetz, purchased a total of 2,972 shares of common stock on September 8, 2026 in open-market transactions, split between direct ownership and an entity he controls.

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

The CFO bought 1,098 shares of Arq common stock directly at a weighted average price of about $2.3396 per share, with individual trades executed between $2.3374 and $2.3415 on September 8, 2026.

How many Arq (ARQ) shares did the CFO acquire indirectly through Steinmetz Advisory Group LLC?

Through Steinmetz Advisory Group LLC, the CFO acquired 1,874 shares of Arq common stock at a weighted average price of about $2.3393 per share, with execution prices ranging from $2.3374 to $2.3415 on September 8, 2026.

What are the CFO’s total Arq (ARQ) holdings after these transactions?

After the reported trades, the CFO holds 353,023 Arq shares directly and 15,000 shares indirectly through Steinmetz Advisory Group LLC, according to the Form 4 ownership figures.

Were the Arq (ARQ) insider purchases under a Rule 10b5-1 trading plan?

The filing indicates no Rule 10b5-1 trading plan affirmation for these transactions; the document-level checkbox for such a plan is not marked as being used for the reported purchases.

How does the CFO treat beneficial ownership of the Arq (ARQ) shares held by Steinmetz Advisory Group LLC?

The Form 4 states that the LLC-held shares are owned by Steinmetz Advisory Group LLC, which the CFO ultimately controls, and that he is an indirect beneficial owner but disclaims beneficial ownership 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 09/10/2026 - 05:34 PM Accepted by SEC EDGAR 09/10/2026 - 05:33 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)
09/08/2026

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	09/08/2026		P		1,098	A	$2.3396(1)	353,023	D
Common Stock	09/08/2026		P		1,874	A	$2.3393(1)	15,000	I	By Steinmetz Advisory Group LLC(2)

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 $2.3374 to $2.3415, 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. 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	09/10/2026
	** 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)