SC 13D/A

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

______________

SCHEDULE 13D

(Rule 13d-101)

INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT

TO RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO

RULE 13d-2(a)

(Amendment No. 9)1

Superior Drilling Products, Inc.

(Name of Issuer)

Common Stock, par value $0.001 per share

(Title of Class of Securities)

868153107

(CUSIP Number)

JEFFREY E. EBERWEIN

STAR EQUITY FUND, LP

53 Forest Avenue, Suite 101

Old Greenwich, Connecticut 06870

(203) 489-9504

(Name, Address and Telephone Number of Person

Authorized to Receive Notices and Communications)

July 8, 2024

(Date of Event Which Requires Filing of This Statement)

    If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of Rule 13d-1(e), 13d-1(f) or 13d-1(g), check the following box ☐.

Note. Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See Rule 13d-7 for other parties to whom copies are to be sent.

1    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 disclosures provided in a prior cover page.

    The information required on 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, as amended (“Exchange 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. 868153107

1	NAME OF REPORTING PERSONS STAR EQUITY FUND, LP
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*(a) ☒ (b) ☐
3	SEC USE ONLY
4	SOURCE OF FUNDS WC
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)☐
6	CITIZENSHIP OR PLACE OF ORGANIZATION DELAWARE
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER 1,040,985
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER 1,040,985
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,040,985
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES☐
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 3.43%
14	TYPE OF REPORTING PERSON PN

2

CUSIP No. 868153107

1	NAME OF REPORTING PERSONS STAR EQUITY FUND GP, LLC
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*(a) ☒ (b) ☐
3	SEC USE ONLY
4	SOURCE OF FUNDS AF
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)☐
6	CITIZENSHIP OR PLACE OF ORGANIZATION DELAWARE
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER 1,040,985
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER 1,040,985
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,040,985
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES☐
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 3.43%
14	TYPE OF REPORTING PERSON OO

3

CUSIP No. 868153107

1	NAME OF REPORTING PERSONS STAR INVESTMENT MANAGEMENT, LLC
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*(a) ☒ (b) ☐
3	SEC USE ONLY
4	SOURCE OF FUNDS AF
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)☐
6	CITIZENSHIP OR PLACE OF ORGANIZATION CONNECTICUT
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER 1,040,985
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER 1,040,985
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,040,985
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES☐
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 3.43%
14	TYPE OF REPORTING PERSON OO

4

CUSIP No. 868153107

1	NAME OF REPORTING PERSONS STAR EQUITY HOLDINGS, INC.
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*(a) ☒ (b) ☐
3	SEC USE ONLY
4	SOURCE OF FUNDS AF, OO
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)☐
6	CITIZENSHIP OR PLACE OF ORGANIZATION DELAWARE
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER 1,040,985
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER 1,040,985
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,040,985
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES☐
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 3.43%
14	TYPE OF REPORTING PERSON CO

5

CUSIP No. 868153107

1	NAME OF REPORTING PERSONS JEFFREY E. EBERWEIN
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*(a) ☒ (b) ☐
3	SEC USE ONLY
4	SOURCE OF FUNDS AF, PF
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)☐
6	CITIZENSHIP OR PLACE OF ORGANIZATION USA
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER 3,024,012
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER 3,024,012
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,024,012
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES☐
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 9.95%
14	TYPE OF REPORTING PERSON IN

6

CUSIP No. 868153107

1	NAME OF REPORTING PERSONS STAR VALUE, LLC
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*(a) ☒ (b) ☐
3	SEC USE ONLY
4	SOURCE OF FUNDS AF
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)☐
6	CITIZENSHIP OR PLACE OF ORGANIZATION DELAWARE
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH	7	SOLE VOTING POWER 1,040,985
	8	SHARED VOTING POWER - 0 -
	9	SOLE DISPOSITIVE POWER 1,040,985
	10	SHARED DISPOSITIVE POWER - 0 -
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,040,985
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES☐
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 3.43%
14	TYPE OF REPORTING PERSON OO

The following constitutes Amendment No. 9 ("Amendment No. 9") to the Schedule 13D filed by the undersigned on September 9, 2022 (as previously amended, the “Schedule 13D”). This Amendment No. 9 amends the Schedule 13D as specifically set forth herein.

Item 3.    Source and Amount of Funds or Other Consideration.

Item 3 is hereby amended and restated to read as follows:

The Shares purchased by Star Equity Fund were purchased with working capital (which may, at any given time, include margin loans made by brokerage firms in the ordinary course of business) in open market purchases, except as otherwise noted, as set forth in Schedule A, which is incorporated by reference herein. The aggregate purchase price of the 1,040,985 Shares beneficially owned by Star Equity Fund is approximately $918,433, excluding brokerage commissions. The aggregate purchase price of the 1,983,027 Shares directly owned by Mr. Eberwein is approximately $1,657,002, excluding brokerage commissions.

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CUSIP No. 868153107

Item 4.     Purpose of Transaction.

Item 4 is hereby amended to include the following:

In connection with the Issuer's announcement of its sale to Drilling Tools International (NASDAQ: DTI) (“DTI”) on March 7, 2024 and subsequent filing on July 2, 2024 of its Form 14A Definitive Proxy Statement Relating to Merger or Acquisition, Star Equity Fund issued a press release, on July 8, 2024, expressing its belief that the Issuer's Board made the right decision in selling SDPI to DTI, a larger public company, and in support of the transaction will be voting for the sale.

Star Equity Fund also stated its belief that its persistence in its recommendations led to hiring a financial advisor and ultimately led to the proposed sale of the Issuer to DTI. Star Equity Fund also believes in the corporate governance and shareholder orientation of DTI post-transaction, and the hope that it will leave the Issuer shareholders in better hands.

The foregoing description of the press release is qualified in its entirety by reference to the full text of the press release, which is attached hereto as Exhibit 99.9 and is incorporated herein by reference.

Item 5.        Interest in Securities of the Issuer.

Item 5(a)-(c) are hereby amended and restated to read as follows:

The aggregate percentage of the Shares reported owned by each person named herein is based upon 30,391,244 Shares outstanding as of May 14, 2024, which is the total number of Shares reported outstanding in the Issuer’s Quarterly Report on Form 10Q, filed with the Securities and Exchange Commission on May 15, 2024.

A.    Star Equity Holdings

(a)    Star Equity Holdings, as the parent of Star Value, sole member of Star Management, and limited partner of Star Equity Fund may be deemed the beneficial owner of the 1,040,985 Shares beneficially owned by Star Equity Fund.

Percentage: Approximately 3.43%

(b)    1. Sole power to vote or direct vote: 1,040,985
2. Shared power to vote or direct vote: 0
3. Sole power to dispose or direct the disposition: 1,040,985
4. Shared power to dispose or direct the disposition: 0

(c)    Star Equity Holdings has not entered into any transactions in the Shares during the past 60 days. The transactions in the Shares on behalf of Star Equity Fund during the past 60 days are set forth in Schedule A and are incorporated herein by reference.

B.    Star Equity Fund

(a)    As of the close of business on July 8, 2024, Star Equity Fund beneficially owned 1,040,985 Shares.

Percentage: Approximately 3.43%

(b)    1. Sole power to vote or direct vote: 1,040,985
2. Shared power to vote or direct vote: 0
3. Sole power to dispose or direct the disposition: 1,040,985
4. Shared power to dispose or direct the disposition: 0

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CUSIP No. 868153107

(c)    The transactions in the Shares by Star Equity Fund during the past 60 days are set forth in Schedule A and are incorporated herein by reference.

C.    Star Equity GP

(a)    Star Equity GP, as the general partner of Star Equity Fund, may be deemed the beneficial owner of the 1,040,985 Shares owned by Star Equity Fund.

Percentage: Approximately 3.43%

(b)    1. Sole power to vote or direct vote: 1,040,985
2. Shared power to vote or direct vote: 0
3. Sole power to dispose or direct the disposition: 1,040,985
4. Shared power to dispose or direct the disposition: 0

(c)    Star Equity GP has not entered into any transactions in the Shares during the past 60 days. The transactions in the Shares on behalf of Star Equity Fund during the past 60 days are set forth in Schedule A and are incorporated herein by reference.

D.    Star Investment Management

(a)    Star Investment Management, as the investment manager of Star Equity Fund, may be deemed the beneficial owner of the 1,040,985 Shares owned by Star Equity Fund.

Percentage: Approximately 3.43%

(b)    1. Sole power to vote or direct vote: 1,040,985
2. Shared power to vote or direct vote: 0
3. Sole power to dispose or direct the disposition: 1,040,985

4. Shared power to dispose or direct the disposition: 0

(c)    Star Equity Holdings has not entered into any transactions in the Shares during the past 60 days. The transactions in the Shares on behalf of Star Equity Fund during the past 60 days are set forth in Schedule A and are incorporated herein by reference.

E.    Mr. Eberwein

(a)    As of close of business July 8, 2024, Mr. Eberwein, directly owned 1,983,027 Shares of common stock. Additionally, as the manager of Star Equity GP and Star Equity Management, may be deemed the beneficial owner of the 1,040,985 Shares owned by Star Equity Fund. Mr. Eberwein may be deemed the beneficial owner of 3,024,012 Shares of common stock.

Percentage: Approximately 9.95%

(b)    1. Sole power to vote or direct vote: 3,024,012

2. Shared power to vote or direct vote: 0
3. Sole power to dispose or direct the disposition: 3,024,012
4. Shared power to dispose or direct the disposition: 0

(c)    The transactions in the Shares by Mr. Eberwein and on behalf of Star Equity Fund during the past 60 days are set forth in Schedule A and are incorporated herein by reference.

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CUSIP No. 868153107

F.    Star Value

(a)    Star Value, as the sole member of Star Equity GP and wholly owned subsidiary of Star Equity Holdings may be deemed the beneficial owner of the Shares of common stock owned by Star Equity Fund.

Percentage: Approximately 3.43%

(b)    1. Sole power to vote or direct vote: 1,040,985
2. Shared power to vote or direct vote: 0
3. Sole power to dispose or direct the disposition: 1,040,985
4. Shared power to dispose or direct the disposition: 0

(c)    Star Value has not entered into any transactions in the Shares during the past 60 days. The transactions in the Shares on behalf of Star Equity Fund during the past 60 days are set forth in Schedule A and are incorporated herein by reference.    

Each Reporting Person, as a member of a “group” with the other Reporting Persons for the purposes of Section 13(d)(3) of the Exchange Act, may be deemed the beneficial owner of the Shares directly owned by the other Reporting Persons. Each Reporting Person disclaims beneficial ownership of such Shares except to the extent of his or its pecuniary interest therein.

Item 7. Material to be Filed as Exhibits.

Item 7 is hereby amended to add the following exhibits:

99.9 Press Release, dated July 8, 2024

SIGNATURES

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: July 8, 2024

Star Equity Fund, LP
By:	Star Equity Fund GP, LLC General Partner
By:	/s/ Jeffrey E. Eberwein
	Name:	Jeffrey E. Eberwein
	Title:	Manager

Star Equity Holdings, Inc.
By:	/s/ Richard K. Coleman Jr.
	Name:	Richard K. Coleman Jr.
	Title:	Chief Executive Officer

10

CUSIP No. 868153107

Star Equity Fund GP, LLC
By:	/s/ Jeffrey E. Eberwein
	Name:	Jeffrey E. Eberwein
	Title:	Manager

Star Investment Management, LLC
By:	/s/ Jeffrey E. Eberwein
	Name:	Jeffrey E. Eberwein
	Title:	Manager

Star Value, LLC
By:	Star Equity Holdings, Inc.
By:	/s/ Jeffrey E. Eberwein
	Name:	Jeffrey E. Eberwein
	Title:	Executive Chairman

/s/ Jeffrey E. Eberwein

Jeffrey E. Eberwein

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CUSIP No. 868153107

SCHEDULE A

Transactions in the Securities of the Issuer During the Past Sixty Days

Shares of Common Stock Purchased/(Sold) Price Per Share ($)1 Date of Purchase / Sale

STAR EQUITY FUND, LP

(5,676)	$1.25	5/10/2024
(16,618)	$1.25	5/13/2024
(17,706)	$1.23	5/14/2024

JEFFREY E. EBERWEIN

None noted.

1The prices reported in this column are weighted average prices. Star Equity Fund, LP and Mr. Eberwein undertakes to provide the Issuer and 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 (or sold) at each separate price such shares were purchased.

12

EX-99.9

Star Equity Fund Issues Statement on Successful Campaign at Superior Drilling Products

Called on Company to Explore Strategic Alternatives in 2022 and Again in 2023

Star Equity Fund Will Vote FOR the Sale to Drilling Tools International

Old Greenwich, CT – July 8, 2024 – Star Equity Fund, LP and affiliates (“Star Equity Fund”, “we”, “our”), an approximate 10% shareholder of Superior Drilling Products, Inc. (NYSE American: SDPI) (“SDPI” or the “Company”), announced today a successful conclusion to its campaign at SDPI.

Under pressure from our campaign, the Company announced its sale to Drilling Tools International (NASDAQ: DTI) (“DTI”) on March 7, 2024. Details of the transaction, which was unanimously approved by the Boards of both DTI and SDPI and a Special Committee of the Board of SDPI (the “SDPI Special Committee”), are available in the Form S-4 filed with the SEC on May 10, 2024 (the “S-4”). The transaction is expected to close in the third quarter of 2024.

We catalyzed the sale of SDPI

We do not believe SDPI’s Board of Directors would have put the Company up for sale had we not encouraged them to do so beginning in 2022. In our open letters to the Company’s Board, issued in 2022 and again in 2023, we insisted that remaining a small public company would be a poor outcome for SDPI shareholders given the Company’s high SG&A expenses, including management compensation and public-company costs, as a percentage of revenue.

While we made a variety of recommendations to the SDPI Board in our letters, we have consistently emphasized that a sale of SDPI to a larger company would be in the best interest of shareholders. We believe our persistence in this recommendation directly resulted in the Company hiring a financial advisor to explore strategic alternatives as announced on May 22, 2023 and, ultimately, SDPI selling itself to DTI.

We will vote FOR the sale

We believe the Company made the right decision to sell itself and we support the transaction with DTI. Therefore, we will vote FOR the sale and we look forward to becoming DTI shareholders. We believe this sale to DTI best aligns with our goals of maximizing value for all SDPI shareholders and creating a thriving, well-regarded Company where customers, employees, and shareholders all benefit from its products, services, and overall presence in the marketplace.

We are disappointed with the SDPI Board’s management of the sale process

While we are pleased that our campaign led to a positive outcome for SDPI shareholders, we are very disappointed with the SDPI Board’s handling of the sale process, especially the SDPI Special Committee consisting of directors Lines, Ronca, and Iverson. Specifically, according to the “Background of the Merger” section of the S-4, SDPI’s financial advisor fielded unsolicited interest in SDPI but, at the direction of the SDPI Special Committee, did not actively solicit potential buyers. This is a difficult decision to understand given the public show the Company made of hiring a financial advisor on May 22, 2023. What exactly did the financial advisor do for its fee of $2.5 million? Excessive financial advisor fees, legal fees, and management transaction bonuses will result in an extremely high cost to the Company (and, thus, to DTI) – estimated to be $5.2 million in the S-4 – representing approximately 16% of transaction value. As disclosed in the S-4, when DTI learned about SDPI’s transaction costs, it reduced its cash acquisition consideration and threatened to walk away from the deal. This latest grievance, unfortunately, is in line with our historically expressed concerns about the shareholder-mindedness of SDPI’s “independent” directors who have a long history of harming shareholder rights and shareholder value at SDPI. Our hope is that directors Lines, Ronca, and Iverson never again serve on a public company board.

We look forward to voting FOR the sale of SDPI to DTI and are pleased that our efforts yielded value for long-suffering SDPI shareholders. We believe the corporate governance and shareholder orientation of DTI’s Board of Directors post-transaction will leave former SDPI shareholders in better hands than they were in previously and believe this transaction will be beneficial to shareholders of both companies.

About Star Equity Fund, LP

Star Equity Fund, LP is an investment fund managed by Star Equity Holdings, Inc. Star Equity Fund seeks to unlock shareholder value and improve corporate governance at its portfolio companies.

About Star Equity Holdings, Inc.

Star Equity Holdings, Inc. is a diversified holding company currently composed of two divisions: Building Solutions and Investments.

For more information contact:
Star Equity Fund, LP	The Equity Group
Jeffrey E. Eberwein	Lena Cati
Portfolio Manager	212-836-9611 / lcati@equityny.com
203-489-9501	Katie Murphy
jeff.eberwein@starequity.com	212-836-9612 / kmurphy@equityny.com