# EDGAR Filing Document

**Accession Number:** 0001781162
**File Stem:** 0001140361-26-015530
**Filing Date:** 2026-4
**Character Count:** 5590
**Document Hash:** f2caeb1885def36a5e1c7141a9269152
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001140361-26-015530.hdr.sgml**: 20260420

**ACCESSION NUMBER**: 0001140361-26-015530

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 12

**CONFORMED PERIOD OF REPORT**: 20260417

**ITEM INFORMATION**: Termination of a Material Definitive Agreement

**FILED AS OF DATE**: 20260420

**DATE AS OF CHANGE**: 20260420

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Momentus Inc.
- **CENTRAL INDEX KEY:** 0001781162
- **STANDARD INDUSTRIAL CLASSIFICATION:** GUIDED MISSILES & SPACE VEHICLES & PARTS [3760]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 841905538
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-39128
- **FILM NUMBER:** 26873973

**BUSINESS ADDRESS:**
- **STREET 1:** 1762 AUTOMATION PARKWAY
- **CITY:** SAN JOSE
- **STATE:** CA
- **ZIP:** 95131
- **BUSINESS PHONE:** 6505647820

**MAIL ADDRESS:**
- **STREET 1:** 1762 AUTOMATION PARKWAY
- **CITY:** SAN JOSE
- **STATE:** CA
- **ZIP:** 95131

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Stable Road Acquisition Corp.
- **DATE OF NAME CHANGE:** 20190628

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### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549

### FORM 8-K

#### CURRENT REPORT

#### Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934
April 17, 2026

Date of Report (date of earliest event reported)

## Momentus Inc.

#### (Exact name of registrant as specified in its charter)

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| | | |
|:---|:---|:---|
| **Delaware**<br>| **001-39128**<br>| **84-1905538**<br>|
| (State or other jurisdiction of incorporation or organization) | (Commission File Number) | (I.R.S. Employer Identification No.) |

---

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| | |
|:---|:---|
| **1762 Automation Parkway**<br>**San Jose, California** | **95131**<br>|
| (Address of Principal Executive Offices) | (Zip Code) |

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(650) 564-7820

Registrant's telephone number, including area code

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to section 12(g) of the Act:

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| | | |
|:---|:---|:---|
| Title of each class | Trading Symbol(s) | Name of each exchange on which registered |
| Class A common stock<br>| MNTS<br>| The Nasdaq Stock Market LLC<br>|
| Warrants<br>| MNTSW<br>| The Nasdaq Stock Market LLC<br>|

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Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

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| | |
|:---|:---|
| **Item 1.02.** | **Termination of a Material Definitive Agreement.** |

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As previously disclosed, on September 25, 2025, Momentus Inc. (the "Company") sold to Yield Point NY, LLC (the "Investor") in a private placement (i) that certain Junior Secured Convertible Note having an aggregate principal amount of $1,630,435 (the "Convertible Note"), maturing twelve months after the issue date, with original issue discount of 8% and convertible into shares of Class A common stock of the Company, par value $0.00001 per share ("Common Stock"), originally having a conversion price of $19.9206 on a split-adjusted basis, which conversion price had subsequently adjusted to $3.927 as a result of the Company issuing shares of Common Stock at a lower price, and (ii) warrants to purchase up to an additional $4,000,000 in principal amount of additional Convertible Notes (the "AIR Warrants").

On April 17, 2026, the Company terminated the AIR Warrants as provided therein following the full conversion of all amounts outstanding under the Convertible Note into shares of Common Stock.

Also as of April 17, 2026, all amounts outstanding under that certain Amended and Restated Secured Convertible Promissory Note dated September 8, 2025 issued by the Company to Space Infrastructures Ventures, as amended, have been converted into shares of Common Stock. As a result, the Company no longer has any outstanding convertible indebtedness.

The material terms of the Convertible Note and the AIR Warrants are described under Item 1.01 in the Company's Form 8-K filed with the Securities and Exchange Commission on September 29, 2025, which description is incorporated by reference herein.

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#### SIGNATURE
**Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.**

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| | | | |
|:---|:---|:---|:---|
|  |  | By: | /s/ Lon Ensler |
|  |  | Name: | Lon Ensler |
| Dated: | April 20, 2026 | Title: | Chief Financial Officer |

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