Access group reports 5.37% stake in Tigo Energy

Tigo Energy, Inc. is the subject of an Amendment No. 2 to a Schedule 13D filed by Access Industries entities, Clal Industries Ltd., and Len Blavatnik, updating their ownership in the company’s common stock.

Rhea-AI Filing Summary

Tigo Energy, Inc. is the subject of an Amendment No. 2 to a Schedule 13D filed by Access Industries entities, Clal Industries Ltd., and Len Blavatnik, updating their ownership in the company’s common stock. The amendment reports a disposition of Tigo common shares and restates current beneficial ownership details.

The filing shows that 4,057,315 shares of Tigo common stock are owned directly by Clal Industries Ltd., representing 5.37% of the class, based on 75,543,244 shares outstanding immediately after a registered offering of 5,000,000 shares. Access Industries Holdings LLC, Access Industries, LLC, Access Industries Management, LLC and Len Blavatnik may be deemed to share voting and dispositive power over these shares through a multi‑layer ownership structure, but each of these reporting persons disclaims beneficial ownership of the securities held directly by Clal Industries.

FAQ

What stake in Tigo Energy (TYGO) is reported in this Schedule 13D/A amendment?

The amendment reports that the filing group is deemed to beneficially own 4,057,315 Tigo Energy common shares, representing 5.37% of the outstanding class, with all of these shares held directly by Clal Industries Ltd. under the described ownership structure.

Who directly owns the Tigo Energy (TYGO) shares reported in this Schedule 13D/A?

All 4,057,315 reported Tigo Energy common shares are owned directly by Clal Industries Ltd. Other reporting entities, including Access Industries affiliates and Len Blavatnik, may be deemed to share voting and investment power but disclaim beneficial ownership of shares held by Clal Industries.

How was the 5.37% ownership in Tigo Energy (TYGO) calculated in this filing?

The 5.37% ownership is based on 4,057,315 Tigo Energy common shares relative to an aggregate 75,543,244 shares outstanding, immediately following the issuer’s registered offering of 5,000,000 shares, as stated in the issuer’s February 25, 2026 prospectus supplement referenced in the filing.

Why did Access Industries and related parties file Amendment No. 2 for Tigo Energy (TYGO)?

Amendment No. 2 was filed to report a disposition of Tigo Energy common stock and to update the reporting group’s beneficial ownership information under Rule 13d-2. It amends and supplements the original Schedule 13D and a prior amendment previously filed with the SEC.

Which entities are included as reporting persons in this Tigo Energy (TYGO) Schedule 13D/A amendment?

The reporting persons are Access Industries Holdings LLC, Access Industries, LLC, Access Industries Management, LLC, Clal Industries Ltd., and Len Blavatnik. The filing details how control relationships among these entities lead to shared voting and dispositive power over Clal Industries’ Tigo shares.

What ownership structure links Access Industries to Clal Industries’ Tigo Energy (TYGO) shares?

The filing explains a chain where Len Blavatnik controls Access Industries entities, which control AI SMS L.P., AI Diversified Holdings Ltd., AI Diversified Parent S.a r.l., AI Diversified Holdings S.a r.l., and Access AI Ltd, which wholly owns Clal Industries Ltd., the direct owner of the Tigo shares.

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Accepted by SEC EDGAR 03/17/2026 - 04:27 PM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

(Amendment No. 2)

Tigo Energy, Inc.

(Name of Issuer)

Common Stock, $0.0001 par value

(Title of Class of Securities)

(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)

03/13/2026

(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.

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).

schemaVersion:

SCHEDULE 13D

CUSIP No.

1

Name of reporting person

Access Industries Holdings LLC

2

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

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

SC

5

Check if disclosure of legal proceedings is required pursuant to Items 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 0.00
8	Shared Voting Power 4,057,315.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 4,057,315.00

11

Aggregate amount beneficially owned by each reporting person

4,057,315.00

12

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

13

Percent of class represented by amount in Row (11)

5.37 %

14

Type of Reporting Person (See Instructions)

OO

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 75,543,244 shares of Common Stock issued and outstanding immediately following the Issuer's registered offering of 5,000,000 shares of Common Stock, as reported in the Issuer's Prospectus Supplement filed pursuant to Rule 424(b)(5) with the Securities and Exchange Commission (the "SEC") on February 25, 2026.

SCHEDULE 13D

CUSIP No.

1

Name of reporting person

Access Industries, LLC

2

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

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

SC

5

Check if disclosure of legal proceedings is required pursuant to Items 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 0.00
8	Shared Voting Power 4,057,315.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 4,057,315.00

11

Aggregate amount beneficially owned by each reporting person

4,057,315.00

12

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

13

Percent of class represented by amount in Row (11)

5.37 %

14

Type of Reporting Person (See Instructions)

OO

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 75,543,244 shares of Common Stock issued and outstanding immediately following the Issuer's registered offering of 5,000,000 shares of Common Stock, as reported in the Issuer's Prospectus Supplement filed pursuant to Rule 424(b)(5) with the SEC on February 25, 2026.

SCHEDULE 13D

CUSIP No.

1

Name of reporting person

Access Industries Management, LLC

2

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

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

SC

5

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

6

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 4,057,315.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 4,057,315.00

11

Aggregate amount beneficially owned by each reporting person

4,057,315.00

12

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

13

Percent of class represented by amount in Row (11)

5.37 %

14

Type of Reporting Person (See Instructions)

OO

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 75,543,244 shares of Common Stock issued and outstanding immediately following the Issuer's registered offering of 5,000,000 shares of Common Stock, as reported in the Issuer's Prospectus Supplement filed pursuant to Rule 424(b)(5) with the SEC on February 25, 2026.

SCHEDULE 13D

CUSIP No.

1

Name of reporting person

Clal Industries Ltd.

2

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

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

SC

5

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

6

Citizenship or place of organization

ISRAEL

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 4,057,315.00
8	Shared Voting Power 0.00
9	Sole Dispositive Power 4,057,315.00
10	Shared Dispositive Power 0.00

11

Aggregate amount beneficially owned by each reporting person

4,057,315.00

12

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

13

Percent of class represented by amount in Row (11)

5.37 %

14

Type of Reporting Person (See Instructions)

CO

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 75,543,244 shares of Common Stock issued and outstanding immediately following the Issuer's registered offering of 5,000,000 shares of Common Stock, as reported in the Issuer's Prospectus Supplement filed pursuant to Rule 424(b)(5) with the SEC on February 25, 2026.

SCHEDULE 13D

CUSIP No.

1

Name of reporting person

Len Blavatnik

2

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

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

SC

5

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

6

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 4,057,315.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 4,057,315.00

11

Aggregate amount beneficially owned by each reporting person

4,057,315.00

12

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

13

Percent of class represented by amount in Row (11)

5.37 %

14

Type of Reporting Person (See Instructions)

IN

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 75,543,244 shares of Common Stock issued and outstanding immediately following the Issuer's registered offering of 5,000,000 shares of Common Stock, as reported in the Issuer's Prospectus Supplement filed pursuant to Rule 424(b)(5) with the SEC on February 25, 2026.

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.2 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, is hereby amended and supplemented by the Reporting Persons as set forth below in this Amendment No. 2. 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 99.6 attached hereto and incorporated herein by reference.
(d)	4,057,315 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.
Item 7.	Material to be Filed as Exhibits.
	99.6 Annex A 99.7 Joint Filing Agreement, dated as of March 17, 2026.

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:	03/17/2026

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:	03/17/2026

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:	03/17/2026

Clal Industries Ltd.

Signature:	/s/ Nufar Malovani
Name/Title:	Nufar Malovani /Deputy CEO and General Counsel
Date:	03/17/2026

Signature:	/s/ Alon Heller
Name/Title:	Alon Heller/Vice President
Date:	03/17/2026

Len Blavatnik

Signature:	*/s/ Alejandro Moreno
Name/Title:	By: Alejandro Moreno as Attorney-in-Fact for Len Blavatnik
Date:	03/17/2026

Comments accompanying signature:

* The above signed, by signing his name hereto, executes this Amendment No. 2 to Schedule 13D pursuant to the Limited Power of Attorney executed on behalf of Mr. Blavatnik and filed herewith.