Seaport Calibre Materials Acquisition Corp.
Cash in trust
$133M
$132,591,107
Trust per share
—
Redemption value
IPO
Oct 2021
—
Combination deadline
Feb 1, 2023
Deadline passed
Filings on record
75
Latest Feb 22, 2024
Overview
Seaport Calibre Materials Acquisition Corp. is a special purpose acquisition company incorporated and registered with the SEC under CIK 0001863428. It completed its initial public offering in Oct 2021. The vehicle is sponsored by Seaport Calibre Materials. The mandate targets generalist. Deadline lapsed without a deal; trust returned to public shareholders.
“we intend to focus on businesses where we believe we can create and unlock value through our operational expertise, industry contacts, and ability to implement systems and controls.”
Reading the filings
Arithmetic on what Seaport Calibre Materials Acquisition 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.
Extension history
Shareholders have already approved 1 extension. Each one opened a redemption window, so the public float and the trust are almost certainly smaller than at IPO, and each typically came with a sponsor contribution that lifts trust per share. A vehicle on its second or third extension is one where the sponsor is paying to keep the search alive.
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.
Underwriting
Seaport Global led the offering. It has been named on 10 SPAC IPOs, book-running 10 of them, and 75% 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.
From listing to the date Seaport Calibre Materials Acquisition Corp. must close a deal, extend again, or return the trust. The marker is today.
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.
75 filings in all. 3 in the last three months, against a busiest month of 14.
News on Seaport Calibre Materials Acquisition Corp.
Last 90 daysNothing in the last 90 days that names this vehicle. We attribute a story only when the release carries the ticker or the registered name, so an empty section means no press release or wire story matched — not that nothing was published. The filings below are the primary record either way.
SEC filing history
Free tier: filings older than 24 hours- SC 13G/A
Amended beneficial ownership report (passive)
Accession 0001172661-24-001620
- SC 13G/A
Amended beneficial ownership report (passive)
Accession 0001688382-24-000006
- SC 13G/A
Amended beneficial ownership report (passive)
Accession 0001085146-24-000951
- SC 13G/A
Amended beneficial ownership report (passive)
Accession 0001688382-23-000013
- SC 13G
Beneficial ownership report (passive)
Accession 0001766806-23-000039
- 15-12G
Deregistration of securities
Accession 0001104659-23-019740
- SC 13G/A
Amended beneficial ownership report (passive)
Accession 0001172661-23-000725
- SC 13G/A
Amended beneficial ownership report (passive)
Accession 0000935836-23-000154
- SC 13G/A
Amended beneficial ownership report (passive)
Accession 0001357550-23-000056
- SC 13G
SEAPORT_POLAR
Accession 0001326389-23-000563
- SC 13G
Beneficial ownership report (passive)
Accession 0001085146-23-000670
- SC 13G/A
Amended beneficial ownership report (passive)
Accession 0001172661-23-000442
- 25-NSE
Notification of delisting
Accession 0001354457-23-000066
- 8-K
Submission of matters to a vote of security holders; Other events
Items 5.07, 8.01, 9.01 · Accession 0001104659-23-009010
- SC 13G/A
Amended beneficial ownership report (passive)
Accession 0000902664-23-000988
- DEFA14A
Additional proxy soliciting material
Accession 0001104659-23-008376
- DEFA14A
Additional proxy soliciting material
Accession 0001104659-23-007822
- 8-K
Entry into a material definitive agreement
Items 1.01, 9.01 · Accession 0001104659-23-007820
- DEFA14A
Additional proxy soliciting material
Accession 0001104659-23-007658
- DEFA14A
Additional proxy soliciting material
Accession 0001104659-23-007062
- 8-K
Regulation FD disclosure
Items 7.01, 9.01 · Accession 0001104659-23-007059
- SC 13G/A
Amended beneficial ownership report (passive)
Accession 0000902664-23-000742
- UPLOAD
SEC staff comment letter
Accession 0000000000-23-000384
- DEF 14A
Definitive proxy statement
Accession 0001104659-23-003633
- UPLOAD
SEC staff comment letter
Accession 0000000000-23-000346
- CORRESP
Correspondence with SEC staff
Accession 0001104659-23-001898
- PRE 14A
PRE 14A
Accession 0001104659-22-131405
- 8-K
Entry into a material definitive agreement
Items 1.01, 2.03, 3.02, 9.01 · Accession 0001104659-22-126987
- UPLOAD
SEC staff comment letter
Accession 0000000000-22-013319
- 10-Q
Quarterly report
Accession 0001410578-22-003367
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Seaport Calibre Materials Acquisition Corp.: questions answered
What is Seaport Calibre Materials Acquisition Corp.?
Seaport Calibre Materials Acquisition Corp. is a special purpose acquisition company incorporated and registered with the SEC under CIK 0001863428. It completed its initial public offering in Oct 2021. The vehicle is sponsored by Seaport Calibre Materials. The mandate targets generalist. Deadline lapsed without a deal; trust returned to public shareholders.
How much does Seaport Calibre Materials Acquisition Corp. hold in trust?
Approximately $132,591,107, 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 Seaport Calibre Materials Acquisition Corp. complete a merger?
By Feb 1, 2023, after 1 shareholder-approved extension. If no combination closes by then the sponsor must seek a further extension or wind the vehicle up and return the trust.
What happens if Seaport Calibre Materials Acquisition 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 Seaport Calibre Materials Acquisition 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.
Is the trust value the same as the share price for Seaport Calibre Materials Acquisition 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 Seaport Calibre Materials Acquisition 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 Seaport Calibre Materials Acquisition Corp., and what is their track record?
Seaport Calibre Materials is the sponsor entity, part of the Seaport Calibre Materials franchise. This is the only vehicle we have attributed to that sponsor. Named principals: Stephen Smith.
Which banks underwrote the Seaport Calibre Materials Acquisition Corp. IPO?
Seaport Global. Seaport Global was credited as book-running manager on the cover. Syndicate membership and role are read from the prospectus cover and the underwriting section.
Is Seaport Calibre Materials Acquisition Corp. a good investment?
That is not a question this site answers. Seaport Calibre Materials Acquisition 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 Seaport Calibre Materials Acquisition Corp. data come from?
Filings Seaport Calibre Materials Acquisition Corp. submitted to the SEC under CIK 0001863428: 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 Oct 19, 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.
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Continue reading
The context around this vehicle: who else the sponsor has launched, which banks priced it, and where it sits in the wider market.
Seaport Calibre Materials: the full record
Every vehicle this sponsor has launched, what closed, what liquidated and what is still live.
Seaport Global in SPACs
Mandates, bookrun credit, deal volume and the outcome of the vehicles it priced.
Generalist SPACs
Every vehicle chasing the same mandate, ranked by cash in trust.
All liquidated spacs
Deadline lapsed without a deal; trust returned to public shareholders.
Deadline calendar
Which sponsors are running out of time, and when the extension votes land.
What is a SPAC?
The structure, the economics and where the risks actually sit.
SPAC glossary
Every term in a blank-check filing, defined the way practitioners use it.
How this data is built
Coverage universe, ingestion, normalisation, lifecycle classification and known limits.