CH4 Natural Solutions Acquisition Sponsor LLC - 15 Jun 2026 Form 4 Insider Report for CH4 Natural Solutions Corp (MTNE)

Reporting relationship: 10%+ Owner
Issuer ticker: MTNE
Reported as of: 15 Jun 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 16 Jun 2026, 16:10:03 UTC
Prior SEC filing: 30 Apr 2026
Source filing: View source filing
Reporting owner signature: CH4 Natural Solutions Acquisition Sponsor LLC, By: Arthuros Mangriotis, Authorized Person, /s/ Arthuros Mangriotis

Key filing fact

CH4 Natural Solutions Acquisition Sponsor LLC filed Form 4 for CH4 Natural Solutions Corp (MTNE) on 16 Jun 2026.

Key facts

This page summarizes CH4 Natural Solutions Acquisition Sponsor LLC's Form 4 filing for CH4 Natural Solutions Corp (MTNE).
1 reported transaction and 5 derivative rows are listed below.
Accepted by SEC: 16 Jun 2026, 16:10.

Change

Previous filing in this sequence was filed on 30 Apr 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (5)

CIK 0002044916 Primary reporting owner

CH4 Natural Solutions Acquisition Sponsor LLC

Relationship: 10%+ Owner
Address: C/O RIVERSTONE EARTH LLC, 712 FIFTH AVENUE, 36TH FLOOR, NEW YORK
Signature: CH4 Natural Solutions Acquisition Sponsor LLC, By: Arthuros Mangriotis, Authorized Person, /s/ Arthuros Mangriotis
Signature date: 15 Jun 2026

CIK 0002114731

CH4 Natural Solutions Acquisition Sponsor Holdings, LLC

Relationship: 10%+ Owner
Address: C/O RIVERSTONE EARTH LLC, 712 FIFTH AVENUE, 36TH FLOOR, NEW YORK
Signature: CH4 Natural Solutions Acquisition Sponsor Holdings, LLC, By: Arthuros Mangriotis, Authorized Person, /s/ Arthuros Mangriotis
Signature date: 15 Jun 2026

CIK 0002114730

CH4 Natural Solutions Acquisition Sponsor Manager, LLC

Relationship: 10%+ Owner
Address: C/O RIVERSTONE EARTH LLC, 712 FIFTH AVENUE, 36TH FLOOR, NEW YORK
Signature: CH4 Natural Solutions Acquisition Sponsor Manager, LLC, By: Arthuros Mangriotis, Authorized Person, /s/ Arthuros Mangriotis
Signature date: 15 Jun 2026

CIK 0002115003

Riverstone Earth LLC

Relationship: 10%+ Owner
Address: C/O RIVERSTONE EARTH LLC, 712 FIFTH AVENUE, 36TH FLOOR, NEW YORK
Signature: Riverstone Earth LLC, By: Arthuros Mangriotis, Attorney-in-fact, /s/ Arthuros Mangriotis
Signature date: 15 Jun 2026

CIK 0001222726

LEUSCHEN DAVID M

Relationship: Chairman and CEO, Director, 10%+ Owner
Address: C/O RIVERSTONE EARTH LLC, 712 FIFTH AVENUE, 36TH FLOOR, NEW YORK
Signature: David Leuschen, By: Arthuros Mangriotis, Attorney-in-fact, /s/ Arthuros Mangriotis
Signature date: 15 Jun 2026

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

MTNE transaction Derivative

Class B Ordinary Shares

Other

Transaction value
Shares: -333,333
Change %: -4.3%
Price
Shares after: 7,333,334
Date: 15 Jun 2026
Ownership: See footnote
Underlying class: Class A Ordinary Shares
Underlying amount: 333,333
Exercise price
Footnotes: F1, F2, F3, F4

MTNE transaction Derivative

Class B Ordinary Shares

Other

Transaction value
Shares: -333,333
Change %: -4.3%
Price
Shares after: 7,333,334
Date: 15 Jun 2026
Ownership: See footnote
Underlying class: Class A Ordinary Shares
Underlying amount: 333,333
Exercise price
Footnotes: F1, F2, F3, F4

MTNE transaction Derivative

Class B Ordinary Shares

Other

Transaction value
Shares: -333,333
Change %: -4.3%
Price
Shares after: 7,333,334
Date: 15 Jun 2026
Ownership: See footnote
Underlying class: Class A Ordinary Shares
Underlying amount: 333,333
Exercise price
Footnotes: F1, F2, F3, F4

MTNE transaction Derivative

Class B Ordinary Shares

Other

Transaction value
Shares: -333,333
Change %: -4.3%
Price
Shares after: 7,333,334
Date: 15 Jun 2026
Ownership: See footnote
Underlying class: Class A Ordinary Shares
Underlying amount: 333,333
Exercise price
Footnotes: F1, F2, F3, F4

MTNE transaction Derivative

Class B Ordinary Shares

Other

Transaction value
Shares: -333,333
Change %: -4.3%
Price
Shares after: 7,333,334
Date: 15 Jun 2026
Ownership: See footnote
Underlying class: Class A Ordinary Shares
Underlying amount: 333,333
Exercise price
Footnotes: F1, F2, F3, F4

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 4 footnotes

Footnote F1

The Class B Ordinary Shares are convertible into shares of the Issuer's Class A Ordinary Shares on a one-for-one basis, subject to adjustment pursuant to certain anti-dilution rights, and have no expiration date.

Footnote F2

The Class B Ordinary Shares owned by CH4 Natural Solutions Acquisition Sponsor LLC (the "Sponsor") included up to 1,000,000 shares that were subject to forfeiture in the event the underwriters of the initial public offering of the Issuer's securities did not exercise their over-allotment option in full as described in the Issuer's Registration Statement on Form S-1 (File No. 333-284199). Because the underwriters exercised their over-allotment option in part and the remainder of the option expired, the Sponsor automatically forfeited 333,333 Class B Ordinary Shares on June 15, 2026 for cancellation by the Issuer.

Footnote F3

The Sponsor is the record holder of the shares reported herein. CH4 Natural Solutions Acquisition Sponsor Holdings, LLC is the managing member of the Sponsor. CH4 Natural Solutions Acquisition Sponsor Manager, LLC is the managing member of CH4 Natural Solutions Acquisition Sponsor Holdings, LLC. Riverstone Earth LLC is the managing member of CH4 Natural Solutions Acquisition Sponsor Manager, LLC. David Leuschen is the sole member of Riverstone Earth LLC. As such, CH4 Natural Solutions Acquisition Sponsor Holdings, LLC, CH4 Natural Solutions Acquisition Sponsor Manager, LLC, Riverstone Earth LLC and David Leuschen may be deemed to have or share beneficial ownership of the ordinary shares held directly by the Sponsor. Such entity or person disclaims any beneficial ownership of such securities held by the Sponsor other than to the extent of any pecuniary interest they may have therein, directly or indirectly,

Footnote F4

(Continued from footnote 3) and this report shall not be deemed an admission that the reporting person is the beneficial owner of the securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or any other purpose.