Vieser Jaime 4

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.