Form4insider filings, from the source

Company · CIK 0002029492 · SIC 6770 — Blank Checks

Mountain Lake Acquisition Corp. · MLAC

Insider activity reported against this company. All insider holders · On EDGAR ↗

1M3M6M1Y2YAll datashares as filed — not split-adjusted

Reported at this company — common stock

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Jun 11, 2026 DForm 4 →Jun 15, 4:17 pm EDTMountain Lake Acquisition Sponsor LLC10% Owner495,000——0—
Jun 11, 2026 DForm 4 →Jun 15, 4:17 pm EDTPaul GrinbergChief Executive Officer, Director478,010——0—
Jun 11, 2026 DMForm 4 →Jun 15, 4:16 pm EDTMichael J. MarquezDirector18,224——0—
Jun 11, 2026 DMForm 4 →Jun 15, 4:16 pm EDTJeffrey Todd LagerDirector18,224——0—
Jun 11, 2026 DForm 4 →Jun 15, 4:15 pm EDTJaime VieserDirector478,010——0—
Jun 11, 2026 DForm 4 →Jun 15, 4:15 pm EDTDouglas HorlickCFO and President, Director478,010——0—

Reported at this company — derivatives (options, RSUs, warrants)

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Jun 11, 2026 DForm 4 →Jun 15, 4:17 pm EDTMountain Lake Acquisition Sponsor LLC10% Owner4,355,724——0—
Jun 11, 2026 MForm 4 →Jun 15, 4:17 pm EDTPaul GrinbergChief Executive Officer, Director478,010——0—
Jun 11, 2026 DMForm 4 →Jun 15, 4:16 pm EDTMichael J. MarquezDirector25,000——0—
Jun 11, 2026 DMForm 4 →Jun 15, 4:16 pm EDTJeffrey Todd LagerDirector25,000——0—
Jun 11, 2026 MForm 4 →Jun 15, 4:15 pm EDTJaime VieserDirector478,010——0—
Jun 11, 2026 MForm 4 →Jun 15, 4:15 pm EDTDouglas HorlickCFO and President, Director478,010——0—
Jun 1, 2026 JForm 4 →Jun 10, 4:15 pm EDTMountain Lake Acquisition Sponsor LLC10% Owner2,781,776——4,355,724— late
Jun 1, 2026 JForm 4 →Jun 4, 9:42 pm EDTPaul GrinbergChief Executive Officer, Director478,010——478,010— late
Jun 1, 2026 JForm 4 →Jun 4, 8:45 pm EDTJaime VieserDirector478,010——478,010— late
Jun 1, 2026 JForm 4 →Jun 4, 8:45 pm EDTDouglas HorlickCFO and President, Director478,010——478,010— late