Mountain Lake Acquisition Corp.·4

Jun 4, 8:45 PM ET

Vieser Jaime 4

4 · Mountain Lake Acquisition Corp. · Filed Jun 4, 2026

Research Summary

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MLAC Director Jaime Vieser Receives 478,010 Founder Shares

What Happened
Jaime Vieser, a director of Mountain Lake Acquisition Corp. (MLAC), acquired 478,010 Class B ordinary (“founder”) shares on June 1, 2026. The Form 4 reports this as an "other acquisition or disposition" (transaction code J) reflecting a pro rata distribution of shares from the company's sponsor; no cash or other consideration was paid. The reported shares are Class B founder shares (derivative), not an open-market purchase.

Key Details

  • Transaction date: 2026-06-01; Form 4 filed: 2026-06-04 (three calendar days after the transaction). Form 4s are generally due within two business days.
  • Shares acquired: 478,010 Class B ordinary shares; price: N/A (no consideration).
  • Shares owned after transaction: not specified in the filing.
  • Footnote F1: Shares were received in a pro rata distribution from Mountain Lake Acquisition Sponsor LLC; no consideration paid.
  • Footnote F2: The Class B shares will convert into Class A ordinary shares on a one-for-one basis at the issuer’s initial business combination (or earlier at the holder’s option), subject to adjustments.
  • Transaction code: J (other acquisition/disposition); not a purchase (P) or sale (S).

Context
This was an internal sponsor distribution of founder shares rather than a market purchase or sale—such distributions reflect ownership allocation from the sponsor and do not directly signal buying or selling sentiment in the public market. The Class B founder shares are convertible into Class A shares at the time of Mountain Lake’s initial business combination, so the economic exposure may change if and when conversion occurs.

Insider Transaction Report

Form 4
Period: 2026-06-01
Vieser Jaime
Director
Transactions
  • Other

    Class B ordinary shares, par value $0.0001 per share

    [F1][F2]
    2026-06-01+478,010478,010 total
    Class A ordinary shares (478,010 underlying)
Footnotes (2)
  • [F1]Represents Class B ordinary shares of the Issuer received in a pro rata distribution of assets by Mountain Lake Acquisition Sponsor LLC (the "Sponsor") to its constituent members (the "Sponsor Distribution"). No consideration was paid in connection with the transaction reported herein.
  • [F2]As described in the registration statement on Form S-1 (File No. 333-281410) of the Issuer under the heading "Description of Securities--Founder Shares," the Class B ordinary shares will automatically convert into Class A ordinary shares at the time of the Issuer's initial business combination, or at any time prior to the Issuer's initial business combination, at the option of the holder, on a one-for-one basis, subject to certain adjustments.
Signature
/s/ Jaime Vieser|2026-06-04

Documents

1 file
  • 4
    ownership.xmlPrimary