SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

(Amendment No. 3)

Tigo Energy, Inc.

(Name of Issuer)

Common Stock, $0.0001 par value

(Title of Class of Securities)

77867P104

(CUSIP Number)

Alejandro Moreno
Access Industries, Inc., 40 West 57th St., 28th Floor
New York, NY, 10019
(212) 247-6400

Langhorne S. Perrow
Access Industries, Inc., 40 West 57th St., 28th Floor
New York, NY, 10019
(212) 247-6400

Nicholas P. Pellicani
Debevoise & Plimpton LLP, 28 Tudor Street
London, X0, EC4Y 0AY
44 20 7786 9000

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

05/18/2026

(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 §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box. Checkbox not checked

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 (“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).

SCHEDULE 13D

CUSIP Number(s):

77867P104

Name of reporting person

Access Industries Holdings LLC

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 3,220,645.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 3,220,645.00

Aggregate amount beneficially owned by each reporting person

3,220,645.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

4.24 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

All percentages of ownership of the Common Stock by Reporting Persons presented in this Statement are based on an aggregate of 75,910,794 shares of Common Stock outstanding as of May 1, 2026, as set forth in the Issuer's Form 10-Q filed with the Securities and Exchange Commission (the "SEC") on May 5, 2026.

SCHEDULE 13D

CUSIP Number(s):

77867P104

Name of reporting person

Access Industries, LLC

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 3,220,645.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 3,220,645.00

Aggregate amount beneficially owned by each reporting person

3,220,645.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

4.24 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

SCHEDULE 13D

CUSIP Number(s):

77867P104

Name of reporting person

Access Industries Management, LLC

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 3,220,645.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 3,220,645.00

Aggregate amount beneficially owned by each reporting person

3,220,645.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

4.24 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

SCHEDULE 13D

CUSIP Number(s):

77867P104

Name of reporting person

Clal Industries Ltd.

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

ISRAEL

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 3,220,645.00
8	Shared Voting Power 0.00
9	Sole Dispositive Power 3,220,645.00
10	Shared Dispositive Power 0.00

Aggregate amount beneficially owned by each reporting person

3,220,645.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

4.24 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

SCHEDULE 13D

CUSIP Number(s):

77867P104

Name of reporting person

Len Blavatnik

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 3,220,645.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 3,220,645.00

Aggregate amount beneficially owned by each reporting person

3,220,645.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

4.24 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

SCHEDULE 13D

Item 1.

Security and Issuer

(a)

Title of Class of Securities:

Common Stock, $0.0001 par value

(b)

Name of Issuer:

Tigo Energy, Inc.

(c)

Address of Issuer's Principal Executive Offices:

983 University Avenue, Suite B, Los Gatos, CALIFORNIA , 95032.

Item 1 Comment:

This Amendment No. 3 to the Schedule 13D is being filed by Access Industries Holdings LLC ("AIH"), Access Industries Management, LLC ("AIM"), Access Industries, LLC ("Access LLC"), Clal Industries Ltd. ("CI") and Len Blavatnik (collectively, the "Reporting Persons", and each, a "Reporting Person") to report the disposition of common stock, $0.0001 par value per share (the "Common Stock"), of Tigo Energy, Inc. (the "Issuer"). The Schedule 13D filed by the Reporting Persons with the Securities and Exchange Commission (the "SEC") on June 2, 2023 (the "Schedule"), as amended and supplemented by Amendment No. 1 to Schedule 13D, filed with the SEC on November 6, 2025, and as amended and supplemented by Amendment No. 2 to Schedule 13D, filed with the SEC on March 17, 2026, is hereby amended and supplemented by the Reporting Persons as set forth below in this Amendment No. 3. This amendment is filed by the Reporting Persons in accordance with Rule 13d-2 of the Securities Exchange Act of 1934, as amended, and refers only to information that has materially changed since the filing of the Schedule. The items identified below, or the particular paragraphs of such items which are identified below, are amended as set forth below. Unless otherwise indicated, all capitalized terms used and not defined herein have the respective meanings assigned to them in the Schedule.

Item 5.

Interest in Securities of the Issuer

(a)

The disclosure in Items 5(a), (b) and (d) is hereby amended and restated as follows: (a) (b) The responses of each of the Reporting Persons with respect to Rows 11, 12, and 13 of the cover pages of this Schedule 13D that relate to the aggregate number and percentage of shares of Common Stock (including but not limited to footnotes to such information) are incorporated herein by reference.

(b)

The responses of each of the Reporting Persons with respect to Rows 7, 8, 9, and 10 of the cover pages of this Schedule 13D that relate to the number of shares of Common Stock as to which each of the persons or entities referenced in Item 2 above has sole or shared power to vote or to direct the vote of and sole or shared power to dispose of or to direct the disposition of (including but not limited to footnotes to such information) are incorporated herein by reference.

(c)

The disclosure in Item 5(c) is hereby supplemented by adding the following at the end thereof: (c) The transactions in the Issuer's securities effected by the Reporting Persons within 60 days prior to this filing are set forth on Annex A, filed as Exhibit 99.8 attached hereto and incorporated herein by reference.

(d)

3,220,645 shares of Common Stock are owned directly by CI and each of AIH, Access LLC, AIM and Mr. Blavatnik may be deemed to share voting and investment power over the shares of Common Stock owned by CI because (i) Len Blavatnik controls AIM, AIH, Access LLC and AI International GP Limited (the general partner of AI SMS, as defined below), (ii) Access LLC controls a majority of the outstanding voting interests in AIH, (iii) AIM controls Access LLC and AIH, (iv) AIH owns a majority of the equity of AI SMS L.P. ("AI SMS"), (v) AI SMS owns a majority of the equity of AI Diversified Holdings Ltd. ("Holdings Limited"), (vi) Holdings Limited owns AI Diversified Parent S.a r.l., which owns AI Diversified Holdings S.a r.l., which owns Access AI Ltd ("Access AI"), and (vii) Access AI wholly owns Clal Industries Ltd. ("CI"). Each of the Reporting Persons (other than CI), and each of their affiliated entities and the officers, partners, members and managers thereof, disclaims beneficial ownership of the securities held directly by CI.

(e)

As of May 18, 2026, each of the Reporting Persons ceased to be the beneficial owner of more than five percent of the Issuer's shares of Common Stock.

Item 7.

Material to be Filed as Exhibits.

99.8 Annex A

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.

Access Industries Holdings LLC

Signature:	/s/ Alejandro Moreno
Name/Title:	By: Access Industries Management, LLC, its manager; its Executive Vice President, General Counsel/Alejandro Moreno
Date:	05/28/2026

Access Industries, LLC

Signature:	/s/ Alejandro Moreno
Name/Title:	By: Access Industries Management, LLC, its manager; its Executive Vice President, General Counsel/Alejandro Moreno
Date:	05/28/2026

Access Industries Management, LLC

Signature:	/s/ Alejandro Moreno
Name/Title:	By: Access Industries Management, LLC, its manager; its Executive Vice President, General Counsel/Alejandro Moreno
Date:	05/28/2026

Clal Industries Ltd.

Signature:	/s/ Nufar Malovani
Name/Title:	Nufar Malovani /Deputy CEO and General Counsel
Date:	05/28/2026

Signature:	/s/ Alon Heller
Name/Title:	Alon Heller/Vice President
Date:	05/28/2026

Len Blavatnik

Signature:	*/s/ Alejandro Moreno
Name/Title:	By: Alejandro Moreno as Attorney-in-Fact for Len Blavatnik
Date:	05/28/2026

Comments accompanying signature:

* The above signed, by signing his name hereto, executes this Amendment No. 3 to Schedule 13D pursuant to the Limited Power of Attorney executed on behalf of Mr. Blavatnik and filed herewith.

Amendment: SEC Form SCHEDULE 13D/A filed by Tigo Energy Inc.