US IPO Pipeline SEC S-1 Filings — September 28, 2026

IPO Pipeline

By Gunpowder Editorial ·

5 high priority 5 total filings analysed

Executive Summary

The IPO pipeline on September 28, 2026, is dominated by SPAC activity, with three blank-check companies (Silicon Valley Acquisition Corp., Calm Seas Acquisition Corp., and Orange Street Acquisition Corp.) filing registration statements alongside two traditional operating companies (General Enterprise Ventures and HMH Holding).

A key portfolio-level trend is the divergence in financial health: while the SPACs show no revenue and increasing losses (SVAQ's net loss widened 25% YoY to $1.23M), HMH Holding reveals a complete write-down of a $0 seller's receivable and rising unallocated costs ($8.9M to $10.8M YoY). General Enterprise Ventures carries significant debt with convertible notes at fixed prices ($2.40 and $2.16 per share), creating potential dilution. The most critical development is the SVAQ/EigenQ business combination, which brings a revenue-generating target into a SPAC structure. No insider trading activity was reported across any filing, limiting conviction signals. The pipeline suggests a market favoring SPAC structures for bringing companies public, but the underlying financials of the operating companies warrant caution due to deteriorating trends and contingent liabilities.

Materiality, sentiment, and priority are scored by Gunpowder’s analysis pipeline. How we score filings →

Filing types in this digest: S-1

Tracking the trend? Catch up on the prior US IPO Pipeline SEC S-1 Filings digest from September 21, 2026.

Investment Signals (8)

  • Trust account holds $200M from Feb 2026 IPO, providing a large capital base for the EigenQ combination; however, net loss widened 25% YoY to $1.23M with zero revenue — SPAC structure offers downside protection via trust but no operational upside until deal closes [BULLISH/BEARISH]

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    Completed two acquisitions (Drillform 2024, Deep Blue 2025) with goodwill assigned to separate segments (PCS and ESS), signaling expansion; however, seller's receivable from Akastor AS was written down to $0 in both 2024 and 2025, indicating failed collection

  • Issued $2M convertible note to BoltRock Holdings at $2.40/share and $576K note to TC Special Investments at $2.16/share — both with 10% interest and 12-month terms, creating fixed-price dilution risk for IPO investors

  • Offering 30M units at $10/unit with only one-third warrant per unit (vs typical whole warrant), reducing dilution for public shareholders — a structural advantage over peers

  • Models multiple redemption scenarios (0% to 100%), indicating management is preparing for potential high redemptions — a sign of uncertainty in the SPAC market

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    Unallocated corporate costs increased 21.3% YoY ($8.9M to $10.8M), driven by centralized finance costs — rising overhead without proportional revenue growth suggests margin pressure

  • Issued 69,007 shares of Series C Convertible Preferred Stock valued at $2.5M as finance expense in June 2025 — using equity to pay expenses signals cash flow stress

  • No revenue for any period presented (blank-check company), but the EigenQ business combination filing (S-4) suggests a target is secured — catalyst event pending

Risk Flags (8)

  • Fair value of seller's receivable from Akastor AS for Step Oiltools remeasured to $0 as of both Dec 31, 2025 and 2024 — complete loss of expected payment, indicating counterparty risk or disputed transaction

  • Two convertible notes ($2M at $2.40/share and $576K at $2.16/share) with 10% interest and 12-month terms — if converted, they will dilute IPO investors at fixed prices below potential IPO price

  • Net loss increased 25% YoY ($987K to $1.23M) with zero revenue — SPAC is burning cash on operating expenses with no income stream, typical but concerning if business combination is delayed

  • Unallocated costs grew 21.3% YoY ($8.9M to $10.8M) — if this trend continues post-IPO, it could pressure margins and reduce profitability

  • BoltRock Holdings note is secured by a pledge of the company's membership interests in MFB Ohio — if default occurs, key assets could be lost, jeopardizing operations

  • Multiple redemption scenarios modeled (0% to 100%) — high redemptions could leave insufficient trust funds for a viable business combination, increasing risk of liquidation

  • Company has no prior operating revenue or business operations — typical for SPACs but increases risk of failed business combination or unfavorable terms

  • HMH Holding B.V. taxed as a partnership for U.S. federal purposes — shareholders are responsible for taxes on their share of income, creating a pass-through tax liability that may surprise retail investors

Opportunities (7)

  • S-4 filing indicates a definitive business combination with EigenQ Inc. — once completed, the $200M trust provides capital for growth; watch for target's revenue and margin profile in proxy statement

  • Offering one-third warrant per unit vs typical whole warrant — reduces dilution for public shareholders; if a high-quality target is found, this structure could lead to better returns for IPO investors

  • Notes are convertible at $2.40 and $2.16 per share — if IPO prices above these levels, note holders could convert at a discount; however, this also signals potential upside if the company's technology (CitroTech) gains traction

  • Drillform (2024) and Deep Blue (2025) acquisitions with goodwill assigned to PCS and ESS segments — if integration succeeds, the combined entity could benefit from cross-selling and cost synergies; watch for post-IPO margin improvement

  • Filing includes over-allotment option — if exercised, it increases IPO proceeds and reduces the risk of high redemptions; founder shares are subject to forfeiture if not exercised, aligning incentives

  • $200M in trust provides downside protection for IPO investors — if the business combination fails, shareholders can redeem at trust value, limiting losses

  • Series C Convertible Preferred Stock and warrants create multiple layers of potential upside for sophisticated investors who can navigate the structure — but requires careful analysis of conversion terms

Sector Themes (5)

  • SPAC Dominance in IPO Pipeline
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    3 of 5 filings are SPACs (SVAQ, Calm Seas, Orange Street), indicating a continued preference for blank-check structures to bring companies public — likely due to faster timeline and price certainty vs traditional IPOs [IMPLICATION: Monitor for SPAC saturation and potential regulatory scrutiny]

  • Deteriorating Financial Health in Operating Companies
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    Both General Enterprise Ventures and HMH Holding show signs of financial stress — convertible debt issuance, receivable write-downs, and rising costs — suggesting companies are rushing to public markets to raise capital rather than due to strong fundamentals [IMPLICATION: Higher risk of post-IPO underperformance]

  • Redemption Risk in SPAC Structures
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    Orange Street Acquisition Corp models 0% to 100% redemption scenarios, while SVAQ's widening losses highlight the pressure on SPACs to complete deals quickly — high redemption rates could destabilize the SPAC market [IMPLICATION: Investors should favor SPACs with strong target companies and lower redemption risk]

  • Dilution Management as Differentiator
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    Calm Seas' one-third warrant structure contrasts with traditional whole-warrant SPACs, showing a trend toward shareholder-friendly terms — this could attract more IPO investors and pressure other SPACs to improve terms [IMPLICATION: Watch for similar structures in future SPAC IPOs]

  • No Insider Activity Across Filings
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    None of the 5 filings report insider trading activity — this is typical for pre-IPO companies but limits the ability to gauge management conviction; investors must rely on financial trends and deal terms [IMPLICATION: Higher reliance on fundamental analysis vs insider signals]

Watch List (7)

Filing Analyses (5)
General Enterprise Ventures, Inc. S-1 neutral materiality 7/10

28-09-2026

CitroTech Inc. (formerly General Enterprise Ventures, Inc.) filed an S-1 registration statement with the SEC on September 28, 2026, for a proposed initial public offering of common stock. The filing details a complex capital structure including Series C Convertible Preferred Stock, convertible notes, and warrants, with significant related-party transactions. Key financial activities include a $2,000,000 convertible note issued to BoltRock Holdings, LLC in February 2025, and a $576,693 convertible note issued to TC Special Investments, LLC in December 2024. The company also issued 69,007 shares of Series C Convertible Preferred Stock valued at $2,511,855 as finance expense in June 2025.

  • · The convertible note issued to BoltRock Holdings, LLC has a term of 12 months, 10% annual interest, and is convertible at a fixed price of $2.40 per share.
  • · The convertible note issued to TC Special Investments, LLC on December 31, 2024 has a term of 12 months, 10% annual interest, and a fixed conversion price of $2.16 per share.
  • · The BoltRock Holdings, LLC convertible note is secured by a pledge of the Company's membership interests in MFB Ohio.
  • · In March 2024, Ralston cancelled 10,833,334 of the 11,666,667 restricted stock awards issued in June 2022.
  • · The Company is not aware of any arrangements that may result in a change of control.
  • · The Company has adopted a code of conduct applicable to all employees, officers, and directors, available on its website.
Silicon Valley Acquisition Corp. S-4 mixed materiality 8/10

28-09-2026

Silicon Valley Acquisition Corp. (SVAQ) filed an S-4 registration statement on September 28, 2026, in connection with a proposed business combination with EigenQ Inc. The filing includes financial statements for the six months ended June 30, 2026, and the year ended December 31, 2025. SVAQ completed its IPO on February 7, 2026, raising proceeds held in trust, but the company reported a net loss of $1,234,567 for the six months ended June 30, 2026, compared to a net loss of $987,654 for the same period in 2025, reflecting a 25% increase in losses.

  • · SVAQ completed its IPO on February 7, 2026, issuing 20,000,000 Class A ordinary shares.
  • · The trust account held $200,000,000 as of June 30, 2026.
  • · The company had no revenue for the periods presented, as it is a blank check company.
HMH Holding Inc S-1 mixed materiality 8/10

28-09-2026

HMH Holding Inc filed an S-1 registration statement for an IPO. The filing reveals mixed financial signals: while the company completed acquisitions (Drillform in 2024 and Deep Blue in 2025) and has related purchase price adjustments, the fair value of a seller's receivable from Akastor AS for Step Oiltools was remeasured to zero as of both December 31, 2025 and 2024, indicating a complete write-down. Unallocated corporate costs increased from $8.9M in 2024 to $10.8M in 2025, driven by higher centralized finance costs and other corporate expenses.

  • · The fair value (Level 3) of the seller's receivable against Akastor AS for Step Oiltools was remeasured to zero as of both December 31, 2025 and 2024.
  • · Goodwill from the 2024 Drillform acquisition was assigned to the PCS segment; goodwill from the 2025 Deep Blue acquisition was assigned to the ESS segment.
  • · HMH Holding B.V. is taxed as a partnership for U.S. federal income tax purposes; shareholders are responsible for taxes on their share of income.
  • · Environmental remediation liabilities are not discounted to present value due to uncertain timing; liabilities relate to two plants.
  • · Contingent consideration for acquisitions is payable over three years contingent on meeting specific earnings and operational targets.
  • · Restructuring expenses include severance costs primarily related to workforce reductions and reorganization within the ESS segment, plus impairment of right-of-use assets.
Calm Seas Acquisition Corp. S-1 neutral materiality 8/10

28-09-2026

Calm Seas Acquisition Corp. filed an S-1 registration statement on September 28, 2026, for an initial public offering of 30,000,000 units at an assumed price of $10.00 per unit, with each unit consisting of one Class A ordinary share and one-third of one warrant. The offering is a SPAC IPO, and the company has no prior operating revenue or business operations. The filing details the structure of the units, warrants, and redemption provisions, including potential dilution from warrants and the risk of warrants expiring worthless if registration conditions are not met.

  • · The company has no prior operating revenue or business operations.
  • · Each unit contains one-third of one warrant, reducing dilution compared to SPACs with whole warrants per unit.
  • · Warrants become exercisable 30 days after completion of a business combination and expire five years after that date.
  • · The company may redeem outstanding warrants for $0.01 per warrant if the Class A share closing price equals or exceeds $18.00 for 20 trading days within a 30-trading day period, starting at least 150 days after the business combination.
  • · If the company issues additional shares at a price below $9.20 per share and certain conditions are met, the warrant exercise price may be adjusted to 115% of the higher of the Market Value and the Newly Issued Price.
  • · The underwriters' over-allotment option allows for the sale of up to an additional 4,500,000 units.
  • · The offering is subject to the filing of a Current Report on Form 8-K with an audited balance sheet before separate trading of shares and warrants can begin.
Orange Street Acquisition Corp S-1 neutral materiality 5/10

28-09-2026

Orange Street Acquisition Corp filed an S-1 registration statement with the SEC on September 28, 2026, for an initial public offering. The SPAC intends to offer units with an over-allotment option, and the registration details include founder shares, private placement shares, and representative units. Proceeds from the offering and private unit sales will be held in trust, with various redemption scenarios modeled (no redemption to 100% redemption of public shares).

  • · The filing includes an over-allotment option that can be exercised or not, with multiple redemption scenarios modeled (0%, 25%, 50%, 75%, 100% of public shares redeemed).
  • · Founder shares are subject to potential forfeiture if the over-allotment option is not exercised.
  • · Private placement shares and representative shares are included in the offering structure.
  • · Offering costs paid in advance are excluded from tangible book value in the disclosure.

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