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Hyliion Holdings Corp.HYLN

Class A HYLNCIK 0001759631

Cash in trust

$299M

$299,000,000

Trust per share

—

Redemption value

IPO

Mar 2019

$233M raised

Combination deadline

—

Not disclosed

Filings on record

669

Latest Oct 1, 2026

Business combination

Target
Not disclosed in an indexed filing
Announced
Jul 10, 2020
Closed
Oct 7, 2020

Overview

Hyliion Holdings Corp. is a special purpose acquisition company incorporated in Delaware and registered with the SEC under CIK 0001759631. It completed its initial public offering in Mar 2019, raising $233M in gross proceeds and listing on NYSE. Class A shares trade under the ticker HYLN on NYSE. The vehicle is sponsored by Tortoise through Tortoise Sponsor LLC. The mandate targets energy. Business combination closed; the company trades under a new ticker.

“We intend to focus our search for a target business in the energy industry in North America.”
The mandate, as stated in the IPO prospectus
EnergyNorth America

Reading the filings

Arithmetic on what Hyliion Holdings Corp. has disclosed, written the way a desk would read it. These are observations, not a rating. Nothing here scores the vehicle or implies a view on it.

  • Warrant coverage

    Each unit carried one-half warrant per unit. Warrants are dilution deferred: they cost the holder nothing until exercised, and they overhang the post-combination share count. Thinner coverage is generally a sign of a stronger book at pricing.

  • Sponsor record

    Tortoise has launched 2 vehicles. Of the 2 that have resolved, 2 closed a combination and 0 liquidated, a 100% completion rate. A sponsor's record is not a forecast, but it does tell you whether the team has taken a deal across the line before.

  • Underwriting

    Barclays led the offering. It has been named on 53 SPAC IPOs, book-running 43 of them, and 62% of its resolved vehicles closed a deal. The syndicate has no control over whether a sponsor finds a target, but the quality of the book at pricing shapes who ends up holding the units.

How busy it has been

Filings per month since the first one. A vehicle that has gone quiet with a deadline ahead is a different proposition from one that is still working.

311602018-112026-10

669 filings in all. 26 in the last three months, against a busiest month of 31.

News on Hyliion Holdings Corp.

Last 90 days

News sentiment

Neutral
negativeneutralpositive

Across 2 recent stories, weighted towards the newest. Scored by our own headline classifier using finance- and SPAC-specific terms. It reads what a story is about, not what the shares are worth.

SEC filing history

Free tier: filings older than 24 hours
  • 4

    Statement of changes in beneficial ownership

    Accession 0001628280-26-064337

    Oct 1, 2026

    1mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0001628280-26-064335

    Oct 1, 2026

    1mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0001628280-26-064333

    Oct 1, 2026

    1mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0001628280-26-064330

    Oct 1, 2026

    1mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0001628280-26-064328

    Oct 1, 2026

    1mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0001628280-26-064326

    Oct 1, 2026

    1mo ago

    View on EDGAR ↗
  • 8-K

    Current report

    Items 5.02, 9.01 · Accession 0001628280-26-064324

    Oct 1, 2026

    1mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0001628280-26-063053

    Sep 22, 2026

    1mo ago

    View on EDGAR ↗
  • CERT

    Exchange listing certification

    Accession 0000876882-26-000028

    Sep 21, 2026

    1mo ago

    View on EDGAR ↗
  • 8-A12B

    Registration of securities on an exchange

    Accession 0001628280-26-062808

    Sep 21, 2026

    1mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0001628280-26-059280

    Aug 27, 2026

    2mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0001628280-26-058955

    Aug 25, 2026

    2mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0001628280-26-058467

    Aug 21, 2026

    2mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0001628280-26-058465

    Aug 21, 2026

    2mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0001628280-26-058463

    Aug 21, 2026

    2mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0001628280-26-058460

    Aug 21, 2026

    2mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0001628280-26-058457

    Aug 21, 2026

    2mo ago

    View on EDGAR ↗
  • 144

    144 filing

    Accession 0001969223-26-000943

    Aug 21, 2026

    2mo ago

    View on EDGAR ↗
  • 144

    144 filing

    Accession 0001969223-26-000945

    Aug 21, 2026

    2mo ago

    View on EDGAR ↗
  • 144

    144 filing

    Accession 0001969223-26-000941

    Aug 21, 2026

    2mo ago

    View on EDGAR ↗
  • 144

    144 filing

    Accession 0001969223-26-000942

    Aug 21, 2026

    2mo ago

    View on EDGAR ↗
  • 144

    144 filing

    Accession 0001969223-26-000944

    Aug 21, 2026

    2mo ago

    View on EDGAR ↗
  • S-8

    REGISTRATION STATEMENT

    Accession 0001213900-26-087882

    Aug 11, 2026

    2mo ago

    View on EDGAR ↗
  • 424B5

    PROSPECTUS SUPPLEMENT

    Accession 0001213900-26-087832

    Aug 11, 2026

    2mo ago

    View on EDGAR ↗
  • 10-Q

    Quarterly report

    Accession 0001628280-26-055738

    Aug 11, 2026

    2mo ago

    View on EDGAR ↗
  • 8-K

    Current report

    Items 2.02, 9.01 · Accession 0001628280-26-055735

    Aug 11, 2026

    2mo ago

    View on EDGAR ↗
  • SCHEDULE 13G

    Beneficial ownership report (passive)

    Accession 0002012383-26-002595

    Jul 28, 2026

    3mo ago

    View on EDGAR ↗
  • 8-K

    Other events

    Item 8.01 · Accession 0001628280-26-049453

    Jul 23, 2026

    3mo ago

    View on EDGAR ↗
  • 4

    Statement of changes in beneficial ownership

    Accession 0001628280-26-046264

    Jun 30, 2026

    4mo ago

    View on EDGAR ↗
  • SD

    SPECIALIZED DISCLOSURE REPORT

    Accession 0001213900-26-062857

    May 29, 2026

    5mo ago

    View on EDGAR ↗

Pro

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Hyliion Holdings Corp.: questions answered

What is Hyliion Holdings Corp. (HYLN)?

Hyliion Holdings Corp. is a special purpose acquisition company incorporated in Delaware and registered with the SEC under CIK 0001759631. It completed its initial public offering in Mar 2019, raising $233M in gross proceeds and listing on NYSE. Class A shares trade under the ticker HYLN on NYSE. The vehicle is sponsored by Tortoise through Tortoise Sponsor LLC. The mandate targets energy. Business combination closed; the company trades under a new ticker.

How much does Hyliion Holdings Corp. hold in trust?

Approximately $299,000,000, as at the most recent filing on record. Trust balances move: shareholders redeem at extension votes and at the combination vote, and sponsors pay contributions in to extend. Treat the figure as a point-in-time disclosure, not a running balance.

When must Hyliion Holdings Corp. complete a merger?

No combination deadline appears in the filings we have indexed. The date is stated in the charter and repeated in each quarterly report; where our parser could not establish it with confidence we leave it blank rather than infer one.

What happens if Hyliion Holdings Corp. does not find a target in time?

The charter requires the vehicle to redeem 100% of the public shares and return the trust, pro rata, to public shareholders. That is the mechanism working as designed rather than a default. Founder shares and warrants are worthless in that outcome, which is why the sponsor's incentive is to get a deal done or to buy more time. Across the market, deadline lapsed without a deal; trust returned to public shareholders.

Can I redeem shares in Hyliion Holdings Corp., and at what price?

Public shareholders may elect to redeem in connection with a combination vote and at each extension vote, at the pro-rata trust value on the relevant record date. Redemption is a right attached to the public shares only; warrants and rights carry no claim on the trust. The mechanics and the deadline for electing are set out in the proxy statement for the vote in question.

What tickers does Hyliion Holdings Corp. trade under?

Class A shares trade as HYLN on NYSE. Units trade first and separate into their component securities roughly 52 days after the IPO; only the Class A shares carry the redemption right against the trust.

Is the trust value the same as the share price for Hyliion Holdings Corp.?

No. Trust per share is a disclosed, contractual figure: what a redeeming holder receives. The market price is whatever the shares change hands at, which can sit above the trust when a deal is well received or below it when the market doubts one will close. We do not have a current quote for this vehicle, so no spread is shown.

How much dilution do Hyliion Holdings Corp.'s founder shares and warrants create?

Each unit also carried one-half warrant per unit, which is dilution deferred until exercise. Both are disclosed in the prospectus and both survive into the combined company, which is why a de-SPAC at $10 is not economically the same as an IPO at $10.

Who sponsors Hyliion Holdings Corp., and what is their track record?

Tortoise Sponsor LLC is the sponsor entity, part of the Tortoise franchise. That franchise has launched 2 vehicles in total, of which 2 closed a combination and 0 liquidated, a 100% completion rate on resolved vehicles. Named principals: Arc Logistics.

Which banks underwrote the Hyliion Holdings Corp. IPO?

Barclays, Goldman Sachs, UBS. Barclays and Goldman Sachs and UBS were credited as book-running managers on the cover. Syndicate membership and role are read from the prospectus cover and the underwriting section.

Is Hyliion Holdings Corp. tradeable, and where?

Yes. HYLN returned a live quote of $3.25 on NYSE. Quotes here are delayed and refreshed on a schedule rather than streamed, so treat the figure as indicative and confirm on your own venue. Units and warrants trade under their own symbols and are quoted separately.

Is Hyliion Holdings Corp. a good investment?

That is not a question this site answers. Hyliion Holdings Corp. is covered here as reference data: what the company filed, when it filed it, and what the numbers in those filings say. The Edge, FOMO and Potential scores on this page are derived measures with a published formula, not ratings of investment merit: they describe the setup, and every component is shown so you can take them apart. We publish no price targets and no recommendations, and nothing here should be read as advice. The figures are a starting point for your own work, and each one carries the accession number of the filing it came from.

Where does this Hyliion Holdings Corp. data come from?

Filings Hyliion Holdings Corp. submitted to the SEC under CIK 0001759631: the registration statement and final prospectus for the structure, quarterly and annual reports for the trust, current reports and proxy statements for deals, votes and extensions. Trust economics are taken from the registrant's own XBRL tags rather than parsed from prose, which is why they are exact. Every filing in the history above is listed with its accession number, which identifies the document uniquely on EDGAR; Pro accounts open it directly from the row.

Compiled by the SPACListing research desk

Last reconciled Nov 1, 2026

Every figure on this page is read from documents the registrants filed with the U.S. Securities and Exchange Commission, principally the IPO prospectus (Form 424B4), quarterly and annual reports, current reports and proxy statements, the registrant's own XBRL tags for trust economics. Nothing is sourced from press coverage, from the companies themselves, or from a third-party aggregator. Where a filing does not disclose something, the field is left blank rather than estimated.

Read the full methodology · What is in the dataset · Report a correction

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The context around this vehicle: who else the sponsor has launched, which banks priced it, and where it sits in the wider market.