# EDGAR Filing Document

**Accession Number:** 0001781162
**File Stem:** 0001140361-26-014365
**Filing Date:** 2026-4
**Character Count:** 8862
**Document Hash:** 7b6f5a7c99e02b6b534bfa1981648133
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001140361-26-014365.hdr.sgml**: 20260413

**ACCESSION NUMBER**: 0001140361-26-014365

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 13

**CONFORMED PERIOD OF REPORT**: 20260413

**ITEM INFORMATION**: Other Events

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20260413

**DATE AS OF CHANGE**: 20260413

**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:** 26856570

**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

?xml version='1.0' encoding='ASCII'?

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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 13, 2026

Date of Report (date of earliest event reported)

## Momentus Inc.

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

---

| | | |
|:---|:---|:---|
| **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.) |

---

---

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

---

(650) 564-7820

Registrant's telephone number, including area code

#### 3901 N. First Street

#### San Jose, California 95134
Former name, former address, and former fiscal year, if changed since last report

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:

---

| | | |
|:---|:---|:---|
| 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>|

---

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 8.01** | **Other Events.** |

---

#### Press Release
On April 13, Momentus Inc., a Delaware corporation (the "Company") issued a press release which provided updates to its shareholders on upcoming operations. The press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated by reference herein.

---

| | |
|:---|:---|
|  **Item 9.01** | **Financial Statements and Exhibits.** |

---

(d) Exhibits

---

| | |
|:---|:---|
| **Exhibit Number** | **Exhibit Description** |
| [99.1](ef20070362_ex99-1.htm) | Press Release |

---

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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.**

---

| | | | |
|:---|:---|:---|:---|
|  |  | By: | /s/ Lon Ensler |
|  |  | Name: | Lon Ensler |
| Dated: | April 13, 2026 | Title: | Chief Financial Officer |

---

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## Exhibit 99.1

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**Exhibit 99.1**<br>

#### Vigoride-7 Fires All Thrusters and Clears Key Milestones

#### Momentus Marks Technical Achievements as Vigoride-7 Prepares for Payload Operations

**SAN JOSE, Calif. — April 13, 2026 — Momentus Inc. (NASDAQ: MNTS) ("Momentus" or the "Company")**, a U.S. commercial space company specializing in satellite technology, space transportation, and in-orbit services, today shared a series of significant achievements in the ongoing Vigoride-7 mission, marking one of the most successful early-phase operations in the company's history.

Following separation from SpaceX's Transporter-16 mission at approximately 520 km altitude, the Vigoride-7 Orbital Service Vehicle powered on autonomously, deployed its solar arrays, and executed initial configuration as designed.

Within hours, Momentus established two-way communication between Vigoride-7 and our San Jose based Mission Operations Center. Early communication verified the spacecraft and its hosted payloads are healthy. Comprehensive bus system checks validated that **primary and redundant subsystems for power, command & data handling, and attitude control were fully operational**.

Our major milestones to date include:

• **Pressurization of the main water-based propulsion tank** to mission-required levels

• **Activation of the Reaction Control Subsystem (RCS) accumulators**, responsible for pressure regulation of 8 redundant RCS thrusters, providing fine attitude control

• **Attitude Control System (ACS)** successfully dampened out our spacecraft's rotation rates as we prepare to perform an initial orbit adjustment prior to commencing payload operations.

Achieving these milestones paves the way for the next phase of the mission: a planned orbit-lowering maneuver that will position Vigoride-7 for upcoming payload operations.

Momentus CEO, John Rood said "This mission is action-packed, technically demanding, and deeply rewarding,"

Momentus will continue to release progress reports as the mission unfolds over the coming weeks.

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#### About Momentus

Momentus is a U.S. commercial space company offering satellites, satellite components, and in-space transportation and infrastructure services. Through its Vigoride orbital service vehicle, the company delivers hosted payload support, last-mile delivery, and servicing capabilities tailored to scalable mission architectures.

#### Forward-Looking Statements

This press release contains certain statements which may constitute "forward-looking statements" for purposes of the federal securities laws. Forward-looking statements include, but are not limited to, statements regarding the expected filing of the Company's Form 10-K and Form 10-Q and its management team's expectations, hopes, beliefs, intentions or strategies regarding the future, projections, forecasts or other characterizations of future events or circumstances, including any underlying assumptions, and are not guarantees of future performance. Because forward-looking statements relate to the future, they are subject to inherent uncertainties, risks and changes in circumstances that are difficult to predict and many of which are outside of Momentus' control. Many factors could cause actual future events to differ materially from the forward-looking statements in this press release, including but not limited to risks and uncertainties included under the heading "Risk Factors" in the Annual Report on Form 10-K filed by the Company on March 31, 2026, as such factors may be updated from time to time in our other filings with the Commission, accessible on the Commission's website at www.sec.gov and the Investor Relations section of our website at investors.momentus.space. Forward-looking statements speak only as of the date they are made. Readers are cautioned not to put undue reliance on forward-looking statements, and, except as required by law, the Company assumes no obligation and does not intend to update or revise these forward-looking statements, whether as a result of new information, future events, or otherwise.

#### Contact:

I**nvestors:** investors@momentus.space

**Media:** press@momentus.space

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