MNTS

SEC source: 0001062993-22-005000 · form4a.xml · nonDerivative · entry 1

Prime Movers Lab Fund I LP · CIK 0001751631 · 10% owner

Momentus PML SPV 1 LP · CIK 0001780632 · 10% owner

MOMENTUS PML SPV 2 LP · CIK 0001819327 · 10% owner

Momentus PML SPV 3 LP · CIK 0001853076 · 10% owner

Sloss Dakin · CIK 0001875411 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,078,460

F5 · date: This amendment is being filed to correct a clerical error in the number of securities acquired and to correct a technical error that caused the omission of Dakin Sloss as a reporting person.

F1 · price: On August 12, 2021, pursuant to that certain Agreement and Plan of Merger, dated as of October 7, 2020 (as amended, supplemented or modified from time to time, the "Merger Agreement"), by and among Stable Road Acquisition Corp., a Delaware corporation (the "Issuer"), Momentus Inc., a Delaware corporation ("Legacy Momentus"), and the other parties thereto, the Issuer completed its initial business combination (the "Business Combination"). As a result of the Business Combination, the Issuer changed its name to Momentus Inc. In connection with the Business Combination and in accordance with the Merger Agreement, an aggregate of 65,133,131 shares of Class A Common Stock of Legacy Momentus held by the Reporting Person were converted into 14,905,597 shares of Class A Common Stock of the Issuer. The issuance of the shares was approved by the Issuer's board of directors pursuant to Rule 16b-3 under the Securities Exchange Act of 1934, as amended.

F6 · balance_after: The amount of securities beneficially owned following the reported transaction has been adjusted to correct for a previous clerical error.

F2 · ownership.direct: Prime Movers Lab GP I LLC is the general partner of each of the Reporting Persons.

SEC source: 0001213900-20-030877 · ownership.xml · derivative · entry 1

SRC-NI Holdings LLC · CIK 0001781119 · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,136,029

Underlying: Class A Common Stock · 176,471 shares

Expires not disclosed

F1 · derivative.exercise_price: These shares represent Class B common stock transferred from SRC-NI Holdings, LLC (the "Sponsor") to SRAC PIPE Partners LLC (the "Recipient") pursuant to a transfer agreement entered into on October 7, 2020, by and between the Sponsor and the Recipient for no consideration.

F1 · kind: These shares represent Class B common stock transferred from SRC-NI Holdings, LLC (the "Sponsor") to SRAC PIPE Partners LLC (the "Recipient") pursuant to a transfer agreement entered into on October 7, 2020, by and between the Sponsor and the Recipient for no consideration.

F1 · price: These shares represent Class B common stock transferred from SRC-NI Holdings, LLC (the "Sponsor") to SRAC PIPE Partners LLC (the "Recipient") pursuant to a transfer agreement entered into on October 7, 2020, by and between the Sponsor and the Recipient for no consideration.

F2 · derivative.exercise_date: As described in the registrant's registration statement on Form S-1 (File No. 333-233980) under the heading "Description of Securities--Founder Shares and Placement Shares", the shares of Class B common stock will automatically convert into shares of Class A common stock at the time of the registrant's initial business combination on a one-for-one basis subject to certain adjustments and have no expiration date.

F2 · derivative.expiration_date: As described in the registrant's registration statement on Form S-1 (File No. 333-233980) under the heading "Description of Securities--Founder Shares and Placement Shares", the shares of Class B common stock will automatically convert into shares of Class A common stock at the time of the registrant's initial business combination on a one-for-one basis subject to certain adjustments and have no expiration date.

F2 · derivative.underlying_shares: As described in the registrant's registration statement on Form S-1 (File No. 333-233980) under the heading "Description of Securities--Founder Shares and Placement Shares", the shares of Class B common stock will automatically convert into shares of Class A common stock at the time of the registrant's initial business combination on a one-for-one basis subject to certain adjustments and have no expiration date.

SEC source: 0001213900-20-030875 · ownership.xml · derivative · entry 1

Quiroga Juan Manuel · CIK 0001786122 · CIO and Secretary · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 4,136,029

Underlying: Class A Common Stock · 176,471 shares

Expires not disclosed

F1 · derivative.exercise_price: These shares represent Class B common stock held by SRC-NI Holdings, LLC (the "Sponsor") that were transferred from Sponsor to SRAC PIPE Partners LLC (the "Recipient") pursuant to a transfer agreement entered into on October 7, 2020, by and between the Sponsor and the Recipient for no consideration.

F1 · kind: These shares represent Class B common stock held by SRC-NI Holdings, LLC (the "Sponsor") that were transferred from Sponsor to SRAC PIPE Partners LLC (the "Recipient") pursuant to a transfer agreement entered into on October 7, 2020, by and between the Sponsor and the Recipient for no consideration.

F1 · price: These shares represent Class B common stock held by SRC-NI Holdings, LLC (the "Sponsor") that were transferred from Sponsor to SRAC PIPE Partners LLC (the "Recipient") pursuant to a transfer agreement entered into on October 7, 2020, by and between the Sponsor and the Recipient for no consideration.

F2 · derivative.exercise_date: As described in the registrant's registration statement on Form S-1 (File No. 333-233980) under the heading "Description of Securities--Founder Shares and Placement Shares", the shares of Class B common stock will automatically convert into shares of Class A common stock at the time of the registrant's initial business combination on a one-for-one basis subject to certain adjustments and have no expiration date.

F2 · derivative.expiration_date: As described in the registrant's registration statement on Form S-1 (File No. 333-233980) under the heading "Description of Securities--Founder Shares and Placement Shares", the shares of Class B common stock will automatically convert into shares of Class A common stock at the time of the registrant's initial business combination on a one-for-one basis subject to certain adjustments and have no expiration date.

F2 · derivative.underlying_shares: As described in the registrant's registration statement on Form S-1 (File No. 333-233980) under the heading "Description of Securities--Founder Shares and Placement Shares", the shares of Class B common stock will automatically convert into shares of Class A common stock at the time of the registrant's initial business combination on a one-for-one basis subject to certain adjustments and have no expiration date.

F3 · ownership.direct: Brian Kabot, the Chief Executive Officer and Chairman of the registrant, Juan Manuel Quiroga, the Chief Investment Officer and Secretary of the registrant, and Edward Freedman, are the managers of the Sponsor and have voting and investment discretion with respect to the securities held by the Sponsor. As such, the reporting person may be deemed to share beneficial ownership of the securities held directly by the Sponsor. The reporting person disclaims any beneficial ownership of the reported securities other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

F3 · ownership.nature: Brian Kabot, the Chief Executive Officer and Chairman of the registrant, Juan Manuel Quiroga, the Chief Investment Officer and Secretary of the registrant, and Edward Freedman, are the managers of the Sponsor and have voting and investment discretion with respect to the securities held by the Sponsor. As such, the reporting person may be deemed to share beneficial ownership of the securities held directly by the Sponsor. The reporting person disclaims any beneficial ownership of the reported securities other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

SEC source: 0001213900-20-030873 · ownership.xml · derivative · entry 1

Kabot Brian · CIK 0001786113 · Director · Chief Executive Officer · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 4,136,029

Underlying: Class A Common Stock · 176,471 shares

Expires not disclosed

F1 · derivative.exercise_price: These shares represent Class B common stock held by SRC-NI Holdings, LLC (the "Sponsor") that were transferred from Sponsor to SRAC PIPE Partners LLC (the "Recipient") pursuant to a transfer agreement entered into on October 7, 2020, by and between the Sponsor and the Recipient for no consideration.

F1 · kind: These shares represent Class B common stock held by SRC-NI Holdings, LLC (the "Sponsor") that were transferred from Sponsor to SRAC PIPE Partners LLC (the "Recipient") pursuant to a transfer agreement entered into on October 7, 2020, by and between the Sponsor and the Recipient for no consideration.

F1 · price: These shares represent Class B common stock held by SRC-NI Holdings, LLC (the "Sponsor") that were transferred from Sponsor to SRAC PIPE Partners LLC (the "Recipient") pursuant to a transfer agreement entered into on October 7, 2020, by and between the Sponsor and the Recipient for no consideration.

F2 · derivative.exercise_date: As described in the registrant's registration statement on Form S-1 (File No. 333-233980) under the heading "Description of Securities--Founder Shares and Placement Shares", the shares of Class B common stock will automatically convert into shares of Class A common stock at the time of the registrant's initial business combination on a one-for-one basis subject to certain adjustments and have no expiration date.

F2 · derivative.expiration_date: As described in the registrant's registration statement on Form S-1 (File No. 333-233980) under the heading "Description of Securities--Founder Shares and Placement Shares", the shares of Class B common stock will automatically convert into shares of Class A common stock at the time of the registrant's initial business combination on a one-for-one basis subject to certain adjustments and have no expiration date.

F2 · derivative.underlying_shares: As described in the registrant's registration statement on Form S-1 (File No. 333-233980) under the heading "Description of Securities--Founder Shares and Placement Shares", the shares of Class B common stock will automatically convert into shares of Class A common stock at the time of the registrant's initial business combination on a one-for-one basis subject to certain adjustments and have no expiration date.

F3 · ownership.direct: Brian Kabot, the Chief Executive Officer and Chairman of the registrant, Juan Manuel Quiroga, the Chief Investment Officer and Secretary of the registrant, and Edward Freedman, are the managers of the Sponsor and have voting and investment discretion with respect to the securities held by the Sponsor. As such, the reporting person may be deemed to share beneficial ownership of the securities held directly by the Sponsor. The reporting person disclaims any beneficial ownership of the reported securities other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

F3 · ownership.nature: Brian Kabot, the Chief Executive Officer and Chairman of the registrant, Juan Manuel Quiroga, the Chief Investment Officer and Secretary of the registrant, and Edward Freedman, are the managers of the Sponsor and have voting and investment discretion with respect to the securities held by the Sponsor. As such, the reporting person may be deemed to share beneficial ownership of the securities held directly by the Sponsor. The reporting person disclaims any beneficial ownership of the reported securities other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

SEC source: 0001213900-20-030871 · ownership.xml · derivative · entry 2

Freedman Edward K. · CIK 0001786735 · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 176,471

Underlying: Class A Common Stock · 176,471 shares

Expires not disclosed

F1 · derivative.exercise_price: These shares represent Class B common stock held by SRC-NI Holdings, LLC (the "Sponsor") that were transferred from Sponsor to SRAC PIPE Partners LLC (the "Recipient") pursuant to a transfer agreement entered into on October 7, 2020, by and between the Sponsor and the Recipient for no consideration.

F1 · kind: These shares represent Class B common stock held by SRC-NI Holdings, LLC (the "Sponsor") that were transferred from Sponsor to SRAC PIPE Partners LLC (the "Recipient") pursuant to a transfer agreement entered into on October 7, 2020, by and between the Sponsor and the Recipient for no consideration.

F1 · price: These shares represent Class B common stock held by SRC-NI Holdings, LLC (the "Sponsor") that were transferred from Sponsor to SRAC PIPE Partners LLC (the "Recipient") pursuant to a transfer agreement entered into on October 7, 2020, by and between the Sponsor and the Recipient for no consideration.

F2 · derivative.exercise_date: As described in the registrant's registration statement on Form S-1 (File No. 333-233980) under the heading "Description of Securities--Founder Shares and Placement Shares", the shares of Class B common stock will automatically convert into shares of Class A common stock at the time of the registrant's initial business combination on a one-for-one basis subject to certain adjustments and have no expiration date.

F2 · derivative.expiration_date: As described in the registrant's registration statement on Form S-1 (File No. 333-233980) under the heading "Description of Securities--Founder Shares and Placement Shares", the shares of Class B common stock will automatically convert into shares of Class A common stock at the time of the registrant's initial business combination on a one-for-one basis subject to certain adjustments and have no expiration date.

F2 · derivative.underlying_shares: As described in the registrant's registration statement on Form S-1 (File No. 333-233980) under the heading "Description of Securities--Founder Shares and Placement Shares", the shares of Class B common stock will automatically convert into shares of Class A common stock at the time of the registrant's initial business combination on a one-for-one basis subject to certain adjustments and have no expiration date.

F4 · ownership.direct: Stable Road Capital LLC is the managing member (the "Managing Member") of the Recipient. Edward Freedman is the sole member of the Managing Member. As such, the reporting person may be deemed to possess beneficial ownership of the securities held directly by the Recipient. The reporting person disclaims any beneficial ownership of the reported securities other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

F4 · ownership.nature: Stable Road Capital LLC is the managing member (the "Managing Member") of the Recipient. Edward Freedman is the sole member of the Managing Member. As such, the reporting person may be deemed to possess beneficial ownership of the securities held directly by the Recipient. The reporting person disclaims any beneficial ownership of the reported securities other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

SEC source: 0001213900-20-030871 · ownership.xml · derivative · entry 1

Freedman Edward K. · CIK 0001786735 · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 4,136,029

Underlying: Class A Common Stock · 176,471 shares

Expires not disclosed

F1 · derivative.exercise_price: These shares represent Class B common stock held by SRC-NI Holdings, LLC (the "Sponsor") that were transferred from Sponsor to SRAC PIPE Partners LLC (the "Recipient") pursuant to a transfer agreement entered into on October 7, 2020, by and between the Sponsor and the Recipient for no consideration.

F1 · kind: These shares represent Class B common stock held by SRC-NI Holdings, LLC (the "Sponsor") that were transferred from Sponsor to SRAC PIPE Partners LLC (the "Recipient") pursuant to a transfer agreement entered into on October 7, 2020, by and between the Sponsor and the Recipient for no consideration.

F1 · price: These shares represent Class B common stock held by SRC-NI Holdings, LLC (the "Sponsor") that were transferred from Sponsor to SRAC PIPE Partners LLC (the "Recipient") pursuant to a transfer agreement entered into on October 7, 2020, by and between the Sponsor and the Recipient for no consideration.

F2 · derivative.exercise_date: As described in the registrant's registration statement on Form S-1 (File No. 333-233980) under the heading "Description of Securities--Founder Shares and Placement Shares", the shares of Class B common stock will automatically convert into shares of Class A common stock at the time of the registrant's initial business combination on a one-for-one basis subject to certain adjustments and have no expiration date.

F2 · derivative.expiration_date: As described in the registrant's registration statement on Form S-1 (File No. 333-233980) under the heading "Description of Securities--Founder Shares and Placement Shares", the shares of Class B common stock will automatically convert into shares of Class A common stock at the time of the registrant's initial business combination on a one-for-one basis subject to certain adjustments and have no expiration date.

F2 · derivative.underlying_shares: As described in the registrant's registration statement on Form S-1 (File No. 333-233980) under the heading "Description of Securities--Founder Shares and Placement Shares", the shares of Class B common stock will automatically convert into shares of Class A common stock at the time of the registrant's initial business combination on a one-for-one basis subject to certain adjustments and have no expiration date.

F3 · ownership.direct: Brian Kabot, the Chief Executive Officer and Chairman of the registrant, Juan Manuel Quiroga, the Chief Investment Officer and Secretary of the registrant, and Edward Freedman, are the managers of the Sponsor and have voting and investment discretion with respect to the securities held by the Sponsor. As such, the reporting person may be deemed to share beneficial ownership of the securities held directly by the Sponsor. The reporting person disclaims any beneficial ownership of the reported securities other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

F3 · ownership.nature: Brian Kabot, the Chief Executive Officer and Chairman of the registrant, Juan Manuel Quiroga, the Chief Investment Officer and Secretary of the registrant, and Edward Freedman, are the managers of the Sponsor and have voting and investment discretion with respect to the securities held by the Sponsor. As such, the reporting person may be deemed to share beneficial ownership of the securities held directly by the Sponsor. The reporting person disclaims any beneficial ownership of the reported securities other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

SEC source: 0001213900-19-023734 · ownership.xml · nonDerivative · entry 1

SRC-NI Holdings LLC · CIK 0001781119 · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 495,000

F1 · shares: These shares are underlying units (each unit consisting of one share of Class A common stock and one-half of one warrant, each whole warrant exercisable to purchase one share of Class A common stock) held by SRC-NI Holdings, LLC (the "Sponsor"), acquired pursuant to a unit subscription agreement by and between the Sponsor and the registrant. Does not include 4,312,500 shares of Class B common stock, which shares will automatically convert into shares of Class A common stock at the time of the registrant's initial business combination on a one-for-one basis subject to certain adjustments.

F1 · balance_after: These shares are underlying units (each unit consisting of one share of Class A common stock and one-half of one warrant, each whole warrant exercisable to purchase one share of Class A common stock) held by SRC-NI Holdings, LLC (the "Sponsor"), acquired pursuant to a unit subscription agreement by and between the Sponsor and the registrant. Does not include 4,312,500 shares of Class B common stock, which shares will automatically convert into shares of Class A common stock at the time of the registrant's initial business combination on a one-for-one basis subject to certain adjustments.

F2 · ownership.direct: Brian Kabot, the Chief Executive Officer and Chairman of the registrant, Juan Manuel Quiroga, the Chief Investment Officer and Secretary of the registrant, and Edward Freedman, are the managers of the Sponsor and have voting and investment discretion with respect to the securities held by the Sponsor. As such, each of them may be deemed to share beneficial ownership of the securities held directly by the Sponsor. Each such person disclaims any beneficial ownership of the reported securities other than to the extent of any pecuniary interest they may have therein, directly or indirectly.

SEC source: 0001213900-19-023746 · ownership.xml · nonDerivative · entry 1

Freedman Edward K. · CIK 0001786735 · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · see footnote

Disclosed balance after: 495,000

F1 · shares: These shares are underlying units (each unit consisting of one share of Class A common stock and one-half of one warrant, each whole warrant exercisable to purchase one share of Class A common stock) held by SRC-NI Holdings, LLC (the "Sponsor"), acquired pursuant to a unit subscription agreement by and between the Sponsor and the registrant. Does not include 4,312,500 shares of Class B common stock, which shares will automatically convert into shares of Class A common stock at the time of the registrant's initial business combination on a one-for-one basis subject to certain adjustments.

F1 · balance_after: These shares are underlying units (each unit consisting of one share of Class A common stock and one-half of one warrant, each whole warrant exercisable to purchase one share of Class A common stock) held by SRC-NI Holdings, LLC (the "Sponsor"), acquired pursuant to a unit subscription agreement by and between the Sponsor and the registrant. Does not include 4,312,500 shares of Class B common stock, which shares will automatically convert into shares of Class A common stock at the time of the registrant's initial business combination on a one-for-one basis subject to certain adjustments.

F2 · ownership.nature: Brian Kabot, the Chief Executive Officer and Chairman of the registrant, Juan Manuel Quiroga, the Chief Investment Officer and Secretary of the registrant, and Edward Freedman, are the managers of the Sponsor and have voting and investment discretion with respect to the securities held by the Sponsor. As such, the reporting person may be deemed to share beneficial ownership of the securities held directly by the Sponsor. The reporting person disclaims any beneficial ownership of the reported securities other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

SEC source: 0001213900-19-023743 · ownership.xml · nonDerivative · entry 1

Quiroga Juan Manuel · CIK 0001786122 · Chief Investment Officer · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · see footnote

Disclosed balance after: 495,000

F1 · shares: These shares are underlying units (each unit consisting of one share of Class A common stock and one-half of one warrant, each whole warrant exercisable to purchase one share of Class A common stock) held by SRC-NI Holdings, LLC (the "Sponsor"), acquired pursuant to a unit subscription agreement by and between the Sponsor and the registrant. Does not include 4,312,500 shares of Class B common stock, which shares will automatically convert into shares of Class A common stock at the time of the registrant's initial business combination on a one-for-one basis subject to certain adjustments.

F1 · balance_after: These shares are underlying units (each unit consisting of one share of Class A common stock and one-half of one warrant, each whole warrant exercisable to purchase one share of Class A common stock) held by SRC-NI Holdings, LLC (the "Sponsor"), acquired pursuant to a unit subscription agreement by and between the Sponsor and the registrant. Does not include 4,312,500 shares of Class B common stock, which shares will automatically convert into shares of Class A common stock at the time of the registrant's initial business combination on a one-for-one basis subject to certain adjustments.

F2 · ownership.nature: Brian Kabot, the Chief Executive Officer and Chairman of the registrant, Juan Manuel Quiroga, the Chief Investment Officer and Secretary of the registrant, and Edward Freedman, are the managers of the Sponsor and have voting and investment discretion with respect to the securities held by the Sponsor. As such, the reporting person may be deemed to share beneficial ownership of the securities held directly by the Sponsor. The reporting person disclaims any beneficial ownership of the reported securities other than to the extent of any pecuniary interest he may have therein, directly or indirectly.

SEC source: 0001213900-19-023741 · ownership.xml · nonDerivative · entry 1

Kabot Brian · CIK 0001786113 · Director · Chief Executive Officer · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 495,000

F1 · shares: These shares are underlying units (each unit consisting of one share of Class A common stock and one-half of one warrant, each whole warrant exercisable to purchase one share of Class A common stock) held by SRC-NI Holdings, LLC (the "Sponsor"), acquired pursuant to a unit subscription agreement by and between the Sponsor and the registrant. Does not include 4,312,500 shares of Class B common stock, which shares will automatically convert into shares of Class A common stock at the time of the registrant's initial business combination on a one-for-one basis subject to certain adjustments.

F1 · balance_after: These shares are underlying units (each unit consisting of one share of Class A common stock and one-half of one warrant, each whole warrant exercisable to purchase one share of Class A common stock) held by SRC-NI Holdings, LLC (the "Sponsor"), acquired pursuant to a unit subscription agreement by and between the Sponsor and the registrant. Does not include 4,312,500 shares of Class B common stock, which shares will automatically convert into shares of Class A common stock at the time of the registrant's initial business combination on a one-for-one basis subject to certain adjustments.

F2 · ownership.nature: Brian Kabot, the Chief Executive Officer and Chairman of the registrant, Juan Manuel Quiroga, the Chief Investment Officer and Secretary of the registrant, and Edward Freedman, are the managers of the Sponsor and have voting and investment discretion with respect to the securities held by the Sponsor. As such, the reporting person may be deemed to share beneficial ownership of the securities held directly by the Sponsor. The reporting person disclaims any beneficial ownership of the reported securities other than to the extent of any pecuniary interest he may have therein, directly or indirectly.