# EDGAR Filing Document

**Accession Number:** 0001759631
**File Stem:** 0000000000-26-002177
**Filing Date:** 2026-3
**Character Count:** 2230
**Document Hash:** ded809c88c0f0720978af0f2054bde36
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000000000-26-002177.hdr.sgml**: 20260403

**ACCESSION NUMBER**: 0000000000-26-002177

**CONFORMED SUBMISSION TYPE**: UPLOAD

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20260303

**FILED FOR**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Hyliion Holdings Corp.
- **CENTRAL INDEX KEY:** 0001759631
- **STANDARD INDUSTRIAL CLASSIFICATION:** TRUCK & BUS BODIES [3713]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** UPLOAD
- **SEC FILE NUMBER:** 333-293712

**BUSINESS ADDRESS:**
- **STREET 1:** 1202 BMC DRIVE, SUITE 100
- **CITY:** CEDAR PARK
- **STATE:** TX
- **ZIP:** 78613
- **BUSINESS PHONE:** (833) 495-4466

**MAIL ADDRESS:**
- **STREET 1:** 1202 BMC DRIVE, SUITE 100
- **CITY:** CEDAR PARK
- **STATE:** TX
- **ZIP:** 78613

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Tortoise Acquisition Corp.
- **DATE OF NAME CHANGE:** 20181120
**PUBLIC REFERENCE ACCESSION NUMBER**: 0001213900-26-020082

## Text-Extract

```

                                                           March 3, 2026

Thomas Healy
Chief Executive Officer
Hyliion Holdings Corp.
1202 BMC Drive, Suite 100
Cedar Park, TX 78613

       Re: Hyliion Holdings Corp.
           Registration Statement on Form S-3
           Filed February 25, 2026
           File No. 333-293712
Dear Thomas Healy:

       This is to advise you that we have not reviewed and will not review your
registration
statement.

        Please refer to Rules 460 and 461 regarding requests for acceleration.
We remind you
that the company and its management are responsible for the accuracy and
adequacy of their
disclosures, notwithstanding any review, comments, action or absence of action
by the staff.

       Please contact Kristin Baldwin at 202-551-7172 with any questions.

                                                           Sincerely,

                                                           Division of
Corporation Finance
                                                           Office of
Manufacturing

```

### Attached PDF Documents

**Attachment 1:** `filename1`

_No text found in this document._