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Mario Schlosser

CIK 1844320 · President of Technology & CTO · last filed 2026-07-14

Mario Schlosser is a President of Technology & CTO who has filed 47 SEC Form 4 insider transactions across 2 companies since 2021. The most recent filing shows the insider was granted $17.5K of DUOL on Jul 14, 2026. Across all open-market trades the lifetime net is −$70.3M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $15.6M across reported positions.

"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.

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Disclosed Exposure

$15.63M

Companies

2

Total Filings

47

Lifetime Open-Market Net

-$70.29M

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Symbol Role Shares Price Disclosed Exposure Lifetime OM Net Filings Latest Filed
DUOL Director 4,262 $132.75 $565.8K $0 5 2026-07-14
OSCR President of Technology & CTO 480,866 $31.33 $15.07M -$70.29M 24 2026-07-06

Recent Filings

47 filings
Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
Filed Symbol Action Net Shares Net $ Link
2026-07-14 DUOL Grant (A) +140 $17.5K EDGAR
2026-07-06 OSCR Mixed — -$1.48M EDGAR
2026-06-25 OSCR Mixed — -$30.18M EDGAR
2026-06-23 OSCR Notice (144) −50,000 -$1.43M EDGAR
2026-06-23 OSCR Notice (144) −50,000 -$1.43M EDGAR
2026-06-23 OSCR Notice (144) −880,000 -$25.12M EDGAR
2026-06-23 OSCR Notice (144) −95,000 -$2.71M EDGAR
2026-06-05 DUOL Grant (A) +2,001 $0 EDGAR
2026-06-04 OSCR Sell (S) −34,120 -$748.6K EDGAR
2026-06-02 OSCR Notice (144) −37,488 -$833.4K EDGAR
Showing 1–10 of 47
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Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.