Arq Amendment No.3: Schedule 13G/A Shows 0 Shares

Arq, Inc. Amendment No. 3 to a Schedule 13G/A was filed reporting joint filing by AIGH Capital Management LLC, AIGH Investment Partners LLC and Orin Hirschman.

Rhea-AI Filing Summary

Arq, Inc. Amendment No. 3 to a Schedule 13G/A was filed reporting joint filing by AIGH Capital Management LLC, AIGH Investment Partners LLC and Orin Hirschman. The filing states the Amount beneficially owned is 0 shares and the Percent of class is 0, and that the holders each own 5% or less of the class.

Insights

Securities Compliance Analyst

Amendment clarifies reporting persons and confirms no beneficial ownership.

The filing is an amended Schedule 13G/A (Amendment No. 3) listing AIGH Capital Management LLC, AIGH Investment Partners LLC and Mr. Orin Hirschman as joint reporting persons for Common Stock (CUSIP 00770C101). It explicitly states 0 shares and 0 beneficial ownership.

For regulatory purposes, this document serves to update prior beneficial‑ownership disclosures; timing and motive for the amendment are not stated in the excerpt.

Corporate Governance Specialist

Administrative amendment; no change to ownership stake shown.

The Schedule 13G/A indicates the Reporting Persons remain below the 5% threshold and exercises no voting or dispositive power over shares. Signatures by Orin Hirschman appear on the amendment dated 04/27/2026.

Future filings would show any material ownership changes if they occur.

Key Figures

Amount beneficially owned: 0 shares Percent of class: 0% Voting power (sole/shared): 0 +1 more

4 metrics

Amount beneficially owned 0 shares Schedule 13G/A Amendment No. 3

Percent of class 0% Reported in Item 4(a)-(b)

Voting power (sole/shared) 0 Item 4(c)(i)-(iv) lists sole and shared voting/dispositive power

CUSIP 00770C101 Identifies Arq common stock

Key Terms

Schedule 13G/A, Beneficial ownership, Dispositive power

3 terms

Schedule 13G/A regulatory

"Amendment No. 3 to a Schedule 13G/A was filed reporting joint filing"

A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.

Beneficial ownership regulatory

"Item 4. | Ownership (a) | Amount beneficially owned: 0"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

Dispositive power regulatory

"Item 4(c)(iii)-(iv) | Sole power to dispose or to direct the disposition of: 0"

Dispositive power is the authority to decide the final outcome of an asset, legal claim, contract, or corporate action — in effect the power to dispose of or resolve something. For investors it matters because whoever holds that authority can determine who gets paid, who controls an asset or vote, and how risks and returns are allocated; think of it like holding the key that lets you lock in the winner or loser in a deal.

FAQ

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

What does Arq (ARQ) Schedule 13G/A Amendment No. 3 state?

It states jointly filed ownership information by AIGH entities and Orin Hirschman. The filing reports 0 shares and 0 beneficial ownership, and that each reporting person holds 5% or less of the class.

Who are the reporting persons named in the ARQ amendment?

The amendment names AIGH Capital Management LLC, AIGH Investment Partners LLC, and Orin Hirschman as the joint reporting persons and provides their principal business address.

Does the filing indicate any voting or dispositive power for the reporting persons?

No. The filing lists sole and shared voting powers and dispositive powers as 0, indicating no voting or disposition authority over Arq common shares in this disclosure.

What is the practical effect of a Schedule 13G/A showing 0 shares for ARQ?

A 0‑share report documents that the named parties do not beneficially own Arq common stock above reporting thresholds. It updates the public record but does not change capital structure or immediate shareholder rights.

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

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Accepted by SEC EDGAR 04/27/2026 - 08:06 AM EDT Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 3)

Arq, Inc.

(Name of Issuer)

Common Stock, $0.001 par value

(Title of Class of Securities)

00770C101

(CUSIP Number)

03/31/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 00770C101

1

Names of Reporting Persons

Orin Hirschman

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

0.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

0 %

12

Type of Reporting Person (See Instructions)

HC, IN

SCHEDULE 13G

CUSIP Number(s): 00770C101

1

Names of Reporting Persons

AIGH Capital Management LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

0.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

0 %

12

Type of Reporting Person (See Instructions)

IA, OO

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Arq, Inc.
(b)	Address of issuer's principal executive offices: 8051 E. Maplewood Ave., Suite 210, Greenwood Village, CO, 80111
Item 2.
(a)	Name of person filing: This Schedule 13G is being jointly filed by each of the following persons pursuant to Rule 13d-1 promulgated by the Securities and Exchange Commission pursuant to Section 13 of the Securities Exchange Act of 1934, as amended (the "Act"): (i) AIGH Capital Management, LLC, a Maryland limited liability company ("AIGH CM"), as an Advisor or Sub-Advisor with respect to shares of Common Stock (as defined in Item 2(d) below) held by AIGH Investment Partners, L.P., and WVP Emerging Manger Onshore Fund, LLC - AIGH Series. (ii) AIGH Investment Partners, L.L.C., a Delaware limited liability company ("AIGH LLC";), with respect to shares of Common Stock (as defined in Item 2(d) below) directly held by it; (iii) Mr. Orin Hirschman ("Mr. Hirschman"), who is the Managing Member of AIGH Capital Management, LLC and president of AIGH LLC, with respect to shares of Common Stock (as defined in Item 2(d) below) indirectly held through AIGH CM, directly by AIGH LLC and Mr. Hirschman and his family directly. AIGH Capital Management LLC., AIGH Investment Partners LLC, and Mr. Hirschman are hereinafter sometimes collectively referred to as the "Reporting Persons." Any disclosures herein with respect to persons other than the Reporting Persons are made on information and belief after making inquiry to the appropriate party.
(b)	Address or principal business office or, if none, residence: The principal office and business address of AIGH Capital Management LLC, AIGH Investment Partners LLC, and Mr.Hirschman is: 6006 Berkeley Avenue, Baltimore MD 21209
(c)	Citizenship: See Item 2(a) above and Item 4 of each cover page.
(d)	Title of class of securities: Common Stock, $0.001 par value
(e)	CUSIP No.: 00770C101
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 0
(b)	Percent of class: 0 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 0
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 0
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Ownership of 5 percent or less of a class
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Orin Hirschman

Signature:	/s/ Orin Hirschman
Name/Title:	Orin Hirschman
Date:	04/27/2026

AIGH Capital Management LLC

Signature:	/s/ Orin Hirschman
Name/Title:	Orin Hirschman, Managing Member
Date:	04/27/2026