Mario Schlosser

CIK 1844320 · President of Technology & CTO · last filed 2026-06-05

Mario Schlosser is a President of Technology & CTO who has filed 26 SEC Form 4 insider transactions across 2 companies since 2021. The most recent filing, for DUOL, was dated Jun 5, 2026. Across all open-market trades the lifetime net is −$38.6M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $20.3M 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

$20.31M

Companies

2

Total Filings

26

Lifetime Open-Market Net

-$38.62M

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 4,122 $122.63 $505.5K $0 4 2026-06-05
OSCR President of Technology & CTO 700,638 $28.26 $19.80M -$38.62M 22 2026-06-04

Recent Filings

26 filings
Form 4 transactions across all companies, newest first.
Filed Symbol Action Net Shares Net $ Link
2026-06-05 DUOL Grant (A) +2,001 $0 EDGAR
2026-06-04 OSCR Sell (S) −34,120 -$748.6K EDGAR
2026-03-04 OSCR Mixed +164,806 -$325.8K EDGAR
2026-01-12 OSCR Mixed -$406.6K EDGAR
2026-01-08 OSCR Mixed -$1.31M EDGAR
2026-01-06 OSCR Mixed −88,168 -$3.59M EDGAR
2025-12-30 OSCR Sell (S) −38,835 -$582.5K EDGAR
2025-12-18 DUOL $0 EDGAR
2025-12-04 OSCR Sell (S) −23,965 -$397.6K EDGAR
2025-11-13 OSCR Mixed -$5.95M EDGAR
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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.