# EDGAR Filing Document

**Accession Number:** 0000064463
**File Stem:** 0001493152-23-005251
**Filing Date:** 2023-2
**Character Count:** 21205
**Document Hash:** 763134e25ddd7ac442c3679057b0ce10
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001493152-23-005251.hdr.sgml**: 20230216

**ACCESSION NUMBER**: 0001493152-23-005251

**CONFORMED SUBMISSION TYPE**: SC 13G/A

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20230216

**DATE AS OF CHANGE**: 20230215

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Soluna Holdings, Inc
- **CENTRAL INDEX KEY:** 0000064463
- **STANDARD INDUSTRIAL CLASSIFICATION:** FINANCE SERVICES [6199]
- **IRS NUMBER:** 141462255
- **STATE OF INCORPORATION:** NV
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SC 13G/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-03199
- **FILM NUMBER:** 23636618

**BUSINESS ADDRESS:**
- **STREET 1:** 325 WASHINGTON AVENUE EXTENSION
- **CITY:** ALBANY
- **STATE:** NY
- **ZIP:** 12205
- **BUSINESS PHONE:** 518-218-2500

**MAIL ADDRESS:**
- **STREET 1:** 325 WASHINGTON AVENUE EXTENSION
- **CITY:** ALBANY
- **STATE:** NY
- **ZIP:** 12205

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MECHANICAL TECHNOLOGY INC
- **DATE OF NAME CHANGE:** 19920703
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Brookstone Partners IAC, Inc.
- **CENTRAL INDEX KEY:** 0001911720
- **IRS NUMBER:** 832057704
- **STATE OF INCORPORATION:** NY
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SC 13G/A

**BUSINESS ADDRESS:**
- **STREET 1:** 232 MADISON AVENUE
- **STREET 2:** SUITE 600
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10016
- **BUSINESS PHONE:** 212-302-0699

**MAIL ADDRESS:**
- **STREET 1:** 232 MADISON AVENUE
- **STREET 2:** SUITE 600
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10016

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C. 20549**

**SCHEDULE 13G**

**UNDER THE SECURITIES EXCHANGE ACT OF 1934**

**(Amendment No. 2) \***

<u>Soluna Holdings, Inc.</u>

(Name of Issuer)

<u>Common Stock</u>

(Title of Class of Securities)

<u>583543103</u>

(CUSIP Number)

<u>December 31, 2022</u>

(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)

\*The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

---

| | | |
|:---|:---|:---|
| **CUSIP NO. 583543103** | **Schedule 13G** | **Page 2 of 8** |

---

---

| | |
|:---|:---|
| **1** | NAME OF REPORTING PERSONS<br>Brookstone Partners IAC, Inc. |
| **2** | CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions)<br> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) ☐<br> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) ☐ |
| **3** | SEC USE ONLY<br>|
| **4** | CITIZENSHIP OR PLACE OF ORGANIZATION<br>New York |

---

---

| | | |
|:---|:---|:---|
| <br> NUMBER OF<br> SHARES<br> BENEFICIALLY<br> OWNED BY<br> EACH<br> REPORTING<br> PERSON<br> WITH | **5** | SOLE VOTING POWER<br>0<br>|
| <br> NUMBER OF<br> SHARES<br> BENEFICIALLY<br> OWNED BY<br> EACH<br> REPORTING<br> PERSON<br> WITH | **6** | SHARED VOTING POWER<br>3,750,000 shares<br>|
| <br> NUMBER OF<br> SHARES<br> BENEFICIALLY<br> OWNED BY<br> EACH<br> REPORTING<br> PERSON<br> WITH | **7** | SOLE DISPOSITIVE POWER<br>0<br>|
| <br> NUMBER OF<br> SHARES<br> BENEFICIALLY<br> OWNED BY<br> EACH<br> REPORTING<br> PERSON<br> WITH | **8** | SHARED DISPOSITIVE POWER<br>3,750,000 shares<br>|

---

---

| | |
|:---|:---|
| **9** | AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON<br>3,750,000 shares  |
| **10** | CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (See Instructions) ☐<br>|
| **11** | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)<br>20.1%\*  |
| **12** | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;TYPE OF REPORTING PERSON (See Instructions)<br>IA; CO  |

---

\* Percentage reported is based on 18,694,206 shares of Common Stock outstanding as of December 31, 2022 as provided by the Issuer.

---

| | | |
|:---|:---|:---|
| **CUSIP NO. 583543103** | **Schedule 13G** | **Page 3 of 8** |

---

---

| | |
|:---|:---|
| **1** | NAME OF REPORTING PERSONS<br>Brookstone Partners Acquisition XXIV, LLC |
| **2** | CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions)<br> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) ☐<br> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) ☐ |
| **3** | SEC USE ONLY<br>|
| **4** | CITIZENSHIP OR PLACE OF ORGANIZATION<br>Delaware |

---

---

| | | |
|:---|:---|:---|
| <br> NUMBER OF<br> SHARES<br> BENEFICIALLY<br> OWNED BY<br> EACH<br> REPORTING<br> PERSON<br> WITH | **5** | SOLE VOTING POWER<br>0<br>|
| <br> NUMBER OF<br> SHARES<br> BENEFICIALLY<br> OWNED BY<br> EACH<br> REPORTING<br> PERSON<br> WITH | **6** | SHARED VOTING POWER<br>3,750,000 shares<br>|
| <br> NUMBER OF<br> SHARES<br> BENEFICIALLY<br> OWNED BY<br> EACH<br> REPORTING<br> PERSON<br> WITH | **7** | SOLE DISPOSITIVE POWER<br>0<br>|
| <br> NUMBER OF<br> SHARES<br> BENEFICIALLY<br> OWNED BY<br> EACH<br> REPORTING<br> PERSON<br> WITH | **8** | SHARED DISPOSITIVE POWER<br>3,750,000 shares<br>|

---

---

| | |
|:---|:---|
| **9** | AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON<br>3,750,000 shares  |
| **10** | CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (See Instructions) ☐<br>|
| **11** | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)<br>20.1%\*  |
| **12** | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;TYPE OF REPORTING PERSON (See Instructions)<br>OO  |

---

\* Percentage reported is based on 18,694,206 shares of Common Stock outstanding as of December 31, 2022 as provided by the Issuer.

---

| | | |
|:---|:---|:---|
| **CUSIP NO. 583543103** | **Schedule 13G** | **Page 4 of 8** |

---

---

| | |
|:---|:---|
| **1** | NAME OF REPORTING PERSONS<br>Matthew E. Lipman |
| **2** | CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions)<br> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) ☐<br> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) ☐ |
| **3** | SEC USE ONLY<br>|
| **4** | CITIZENSHIP OR PLACE OF ORGANIZATION<br>USA |

---

---

| | | |
|:---|:---|:---|
| <br> NUMBER OF<br> SHARES<br> BENEFICIALLY<br> OWNED BY<br> EACH<br> REPORTING<br> PERSON<br> WITH | **5** | SOLE VOTING POWER<br>141,495 shares<br>|
| <br> NUMBER OF<br> SHARES<br> BENEFICIALLY<br> OWNED BY<br> EACH<br> REPORTING<br> PERSON<br> WITH | **6** | SHARED VOTING POWER<br>3,750,000 shares<br>|
| <br> NUMBER OF<br> SHARES<br> BENEFICIALLY<br> OWNED BY<br> EACH<br> REPORTING<br> PERSON<br> WITH | **7** | SOLE DISPOSITIVE POWER<br>141,495 shares<br>|
| <br> NUMBER OF<br> SHARES<br> BENEFICIALLY<br> OWNED BY<br> EACH<br> REPORTING<br> PERSON<br> WITH | **8** | SHARED DISPOSITIVE POWER<br>3,750,000 shares<br>|

---

---

| | |
|:---|:---|
| **9** | AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON<br>3,891,495 shares  |
| **10** | CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (See Instructions) ☐<br>|
| **11** | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)<br>20.8%\*  |
| **12** | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;TYPE OF REPORTING PERSON (See Instructions)<br>IN  |

---

\* Percentage reported is based on 18,694,206 shares of Common Stock outstanding as of December 31, 2022 as provided by the Issuer.

---

| | | |
|:---|:---|:---|
| **CUSIP NO. 583543103** | **Schedule 13G** | **Page 5 of 8** |

---

---

| | |
|:---|:---|
| **1** | NAME OF REPORTING PERSONS<br>Michael Toporek |
| **2** | CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions)<br> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) ☐<br> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) ☐ |
| **3** | SEC USE ONLY<br>|
| **4** | CITIZENSHIP OR PLACE OF ORGANIZATION<br>USA |

---

---

| | | |
|:---|:---|:---|
| <br> NUMBER OF<br> SHARES<br> BENEFICIALLY<br> OWNED BY<br> EACH<br> REPORTING<br> PERSON<br> WITH | **5** | SOLE VOTING POWER<br>194,634 shares<br>|
| <br> NUMBER OF<br> SHARES<br> BENEFICIALLY<br> OWNED BY<br> EACH<br> REPORTING<br> PERSON<br> WITH | **6** | SHARED VOTING POWER<br>3,750,000 shares<br>|
| <br> NUMBER OF<br> SHARES<br> BENEFICIALLY<br> OWNED BY<br> EACH<br> REPORTING<br> PERSON<br> WITH | **7** | SOLE DISPOSITIVE POWER<br>194,634 shares<br>|
| <br> NUMBER OF<br> SHARES<br> BENEFICIALLY<br> OWNED BY<br> EACH<br> REPORTING<br> PERSON<br> WITH | **8** | SHARED DISPOSITIVE POWER<br>3,750,000 shares<br>|

---

---

| | |
|:---|:---|
| **9** | AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON<br>3,944,634 shares  |
| **10** | CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (See Instructions) ☐<br>|
| **11** | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)<br>21.1%\*  |
| **12** | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;TYPE OF REPORTING PERSON (See Instructions)<br>IN  |

---

\* Percentage reported is based on 18,694,206 shares of Common Stock outstanding as of December 31, 2022 as provided by the Issuer.

---

| | | |
|:---|:---|:---|
| **CUSIP NO. 583543103** | **Schedule 13G** | **Page 6 of 8** |

---

---

| | | |
|:---|:---|:---|
| **Item 1 (a).** | **Name of Issuer:** | Soluna Holdings, Inc. |

---

---

| | |
|:---|:---|
| **Item 1 (b).** | **Address of Issuer's Principal Executive Offices:** |

---

325 Washington Avenue Extension

Albany, NY 12205

---

| | |
|:---|:---|
| **Item** **2 (a).** | **Name of Person Filing:** |

---

Brookstone Partners IAC, Inc. ("Brookstone IAC")

Brookstone Partners Acquisition XXIV, LLC ("Brookstone XXIV")

Matthew E. Lipman

Michael Toporek

Each of the foregoing is referred to as a "Reporting Person" and collectively as the "Reporting Persons." This Schedule 13G is being filed jointly by the Reporting Persons pursuant to an agreement of joint filing, a copy of which was filed with the Reporting Persons' initial statement on Schedule 13G.

Brookstone IAC is the Manager of Brookstone XXIV and may be deemed to beneficially own the 3,750,000 shares of Common Stock owned directly by Brookstone XXIV. Matthew E. Lipman is Secretary of Brookstone IAC and Michael Toporek is President of Brookstone IAC and are deemed to share voting and dispositive power with respect to the shares of Common Stock owned directly by Brookstone XXIV. The filing of this statement shall not be construed as an admission that any of the Reporting Persons is the beneficial owner of any securities covered by the statement other than the securities directly owned by such person.

---

| | |
|:---|:---|
| **Item 2 (b).** | **Address of Principal Business Office or, if none, Residence:** |

---

The address of the principal business office of each of the Reporting Persons is 232 Madison Avenue, Suite 600, New York, New York 10016.

---

| | |
|:---|:---|
| **Item 2 (c).** | **Citizenship:** |

---

Brookstone IAC is a New York corporation.

Brookstone XXIV is a Delaware limited liability company.

Each of Matthew E. Lipman and Michael Toporek is a citizen of the United States of America.

---

| | |
|:---|:---|
| **Item** **2 (d).** | **Title of Class of Securities:** Common Stock, par value $0.001 per share. |

---

---

| | |
|:---|:---|
| **Item** **2 (e).** | **CUSIP Number:** 583543103 |

---

**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:** Not applicable.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(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

(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 association 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);

(k) ☐ Group,
 in accordance with §240.13d-1(b)(1)(ii)(K).

---

| | | |
|:---|:---|:---|
| **CUSIP NO. 583543103** | **Schedule 13G** | **Page 7 of 8** |

---

**Item 4.** **Ownership**

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) **Amount beneficially owned**:

As of December 31, 2022, (i) Brookstone XXIV directly owned 3,750,000 shares; (ii) Brookstone IAC may be deemed to beneficially own 3,750,000 shares by virtue of its shared voting and investment power over the shares directly owned by Brookstone XXIV; (iii) Mr. Lipman may be deemed to beneficially own 3,891,495 shares, including (a) 14,100 shares directly owned; (b) 15,170 restricted stock units, which vested and were settled into shares of common stock on January 23, 2023; (c) vested options to purchase 112,225 shares and (d) 3,750,000 shares indirectly owned by virtue of his position as a control person of Brookstone IAC; and (iv) Mr. Toporek may be deemed to beneficially own 3,944,634 shares, including (a) 20,467 shares directly owned, (b) vested options to purchase 174,167 shares and (c) 3,750,000 shares indirectly owned by virtue of his position as a control person of Brookstone IAC.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) **Percent of class**: 20.1% for each of Brookstone IAC and Brookstone XXIV; 20.8% for Mr. Lipman; 21.1% for Mr. Toporek.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(c) For information on voting and dispositive power with respect to the above listed shares, see Items 5, 6, 7, and 8 on the Cover Pages.

**Item 5.** **Ownership of Five Percent or Less of a Class**

If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following [ ].

Not applicable.

**Item 6.** **Ownership of More than Five 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.** **Certification**

Not applicable.

---

| | | |
|:---|:---|:---|
| **CUSIP NO. 583543103** | **Schedule 13G** | **Page 8 of 8** |

---

**SIGNATURE**

After reasonable inquiry and to the best of his knowledge and belief, each of the undersigned certifies that the information set forth in this statement is true, complete and correct.

Dated this _15th_ day of February, 2023

---

| | |
|:---|:---|
| Brookstone Partners IAC, Inc. | Brookstone Partners IAC, Inc. |
| By: | */s/Matthew E. Lipman* |
| Name: | Matthew E. Lipman |
| Title: | Secretary |

---

---

| | |
|:---|:---|
| Brookstone Partners Acquisition XXIV, LLC | Brookstone Partners Acquisition XXIV, LLC |
| By: | */s/Matthew E. Lipman* |
| Name: | Matthew E. Lipman |
| Title: | Manager |

---

---

| |
|:---|
| */s/Matthew E. Lipman* |
| Matthew E. Lipman |

---

---

| |
|:---|
| */s/Michael Toporek* |
| Michael Toporek |

---

## Exhibit 99.1

**EXHIBIT 99.1**

**<u>JOINT FILING AGREEMENT</u>**

A Joint Filing Agreement was filed as Exhibit 99.1 to the Reporting Persons' initial filing on Schedule 13G and is incorporated herein by reference.