Perimeter Acquisition Corp. IPMTR
Cash in trust
$252M
$252,066,694
Trust per share
—
Redemption value
IPO
May 2025
—
Combination deadline
May 14, 2027
207 days remaining
Filings on record
43
Latest Aug 14, 2026
Overview
Perimeter Acquisition Corp. I is a special purpose acquisition company incorporated in Cayman Islands and registered with the SEC under CIK 0002061473. It completed its initial public offering in May 2025 and listing on Nasdaq. Class A shares trade under the ticker PMTR, units under PMTRU, warrants under PMTRW on Nasdaq. The vehicle is sponsored by Perimeter through Perimeter Acquisition Sponsor LLC. The mandate targets aerospace & defense. IPO closed, trust funded, no definitive agreement announced.
“we intend to focus on industries that complement our management team's background, and to capitalize on the ability of our management team to identify and acquire a business in the United States of America or an ally of the US, focusing on the defense and national security sectors.”
Reading the filings
Arithmetic on what Perimeter Acquisition Corp. I 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.
Time on the clock
207 days to the May 14, 2027 deadline. Still workable for a deal already in diligence, tight for one that has not been found. Watch for an extension proxy, which typically appears a month or two before the date.
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
Citigroup led the offering. It has been named on 170 SPAC IPOs, book-running 114 of them, and 53.6% 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 Perimeter Acquisition Corp. I 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.
43 filings in all. 2 in the last three months, against a busiest month of 24.
Scores
Recomputed 4m agoThree readings of Perimeter Acquisition Corp. I, each an unweighted mean of the components shown beneath it, and each component a percentile against every live SPAC rather than an absolute we invented. They describe the setup, not the merit. How they are built
FOMO
LowHow much attention is this vehicle attracting right now?
0/100
- Filing activity0
0 in 30 days
- News coverage0
0 stories in 30 days
Attention is not quality. FOMO rises on news volume and on the market paying above trust, both of which have preceded plenty of disappointments.
Potential
ElevatedHow likely is this vehicle to complete a combination, and at what scale?
61/100
- Lead bank record27
53.6%
- Bank franchise97
170 SPAC mandates
- Trust scale79
$252M
- Stage40
searching
Potential is about execution, not about the target. It says nothing about whether the eventual deal is worth owning, because the target is usually unknown when the score is computed.
These are derived measures, not ratings of investment merit. They carry no view on the target, no price target and no recommendation, and a high score is not a reason to buy anything.
News on Perimeter Acquisition Corp. I
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- SCHEDULE 13G/A
Amended beneficial ownership report (passive)
Accession 0001193125-26-351088
- 10-Q
Quarterly report
Accession 0001493152-26-037779
- 10-Q
Quarterly report
Accession 0001493152-26-023853
- SCHEDULE 13G
Beneficial ownership report (passive)
Accession 0001688382-26-000018
- 10-K
Annual report
Accession 0001493152-26-013411
- SCHEDULE 13G/A
Amended beneficial ownership report (passive)
Accession 0001193125-26-051873
- SCHEDULE 13G/A
Amended beneficial ownership report (passive)
Accession 0001193125-26-051265
- SCHEDULE 13G/A
Amended beneficial ownership report (passive)
Accession 0001193125-25-280431
- 10-Q
Quarterly report
Accession 0001493152-25-021951
- SCHEDULE 13G/A
Amended beneficial ownership report (passive)
Accession 0000950170-25-108465
- 10-Q
Quarterly report
Accession 0001641172-25-023516
- SCHEDULE 13G
Beneficial ownership report (passive)
Accession 0000950170-25-108002
- SCHEDULE 13G
Beneficial ownership report (passive)
Accession 0001104659-25-075505
- 10-Q
Quarterly report
Accession 0001641172-25-016080
- 8-K
Other events
Items 8.01, 9.01 · Accession 0001641172-25-015102
- 3
Initial statement of beneficial ownership
Accession 0001641172-25-012686
- 8-K
Other events
Items 8.01, 9.01 · Accession 0001641172-25-011759
- SCHEDULE 13G
Beneficial ownership report (passive)
Accession 0001123292-25-000244
- SCHEDULE 13G
Beneficial ownership report (passive)
Accession 0000950170-25-073832
- SCHEDULE 13G
Beneficial ownership report (passive)
Accession 0000950170-25-072225
- 8-K
Entry into a material definitive agreement; Other events
Items 1.01, 3.02, 5.02, 5.03, 8.01, 9.01 · Accession 0001641172-25-010372
- 424B4
Final IPO prospectus
Accession 0001641172-25-010061
- EFFECT
Notice of effectiveness
Accession 9999999995-25-001496
- 3
Initial statement of beneficial ownership
Accession 0001641172-25-009808
- 3
Initial statement of beneficial ownership
Accession 0001641172-25-009806
- 3
Initial statement of beneficial ownership
Accession 0001641172-25-009804
- 3
Initial statement of beneficial ownership
Accession 0001641172-25-009802
- 3
Initial statement of beneficial ownership
Accession 0001641172-25-009800
- 3
Initial statement of beneficial ownership
Accession 0001641172-25-009798
- 3
Initial statement of beneficial ownership
Accession 0001641172-25-009796
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Perimeter Acquisition Corp. I: questions answered
What is Perimeter Acquisition Corp. I (PMTR)?
Perimeter Acquisition Corp. I is a special purpose acquisition company incorporated in Cayman Islands and registered with the SEC under CIK 0002061473. It completed its initial public offering in May 2025 and listing on Nasdaq. Class A shares trade under the ticker PMTR, units under PMTRU, warrants under PMTRW on Nasdaq. The vehicle is sponsored by Perimeter through Perimeter Acquisition Sponsor LLC. The mandate targets aerospace & defense. IPO closed, trust funded, no definitive agreement announced.
How much does Perimeter Acquisition Corp. I hold in trust?
Approximately $252,066,694, 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 Perimeter Acquisition Corp. I complete a merger?
By May 14, 2027. 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 Perimeter Acquisition Corp. I 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 Perimeter Acquisition Corp. I, 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 Perimeter Acquisition Corp. I trade under?
Class A shares trade as PMTR on Nasdaq, the units as PMTRU, and the warrants as PMTRW. 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 Perimeter Acquisition Corp. I?
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 Perimeter Acquisition Corp. I'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 Perimeter Acquisition Corp. I, and what is their track record?
Perimeter Acquisition Sponsor LLC is the sponsor entity, part of the Perimeter franchise. This is the only vehicle we have attributed to that sponsor. Named principals: Jordan Blashek.
Which banks underwrote the Perimeter Acquisition Corp. I IPO?
Citigroup. Citigroup was credited as book-running manager on the cover. Syndicate membership and role are read from the prospectus cover and the underwriting section.
Is Perimeter Acquisition Corp. I tradeable, and where?
Yes. PMTR returned a live quote of $10.46 on Nasdaq. 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 Perimeter Acquisition Corp. I a good investment?
That is not a question this site answers. Perimeter Acquisition Corp. I 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 Perimeter Acquisition Corp. I data come from?
Filings Perimeter Acquisition Corp. I submitted to the SEC under CIK 0002061473: 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.
Read the full methodology · What is in the dataset · Report a correction
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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.
Perimeter: the full record
Every vehicle this sponsor has launched, what closed, what liquidated and what is still live.
Citigroup in SPACs
Mandates, bookrun credit, deal volume and the outcome of the vehicles it priced.
Aerospace & Defense SPACs
Every vehicle chasing the same mandate, ranked by cash in trust.
All spacs searching for a target
IPO closed, trust funded, no definitive agreement announced.
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.