Stephen C. Chen

CIK 1869758 · General Counsel · last filed 2026-06-18

Stephen C. Chen is a General Counsel who has filed 68 SEC Form 4 insider transactions across 1 company since 2021. The most recent filing shows the insider exercised options covering $836 of DUOL on Jun 18, 2026. Across all open-market trades the lifetime net is −$26.8M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $7.0M 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.

Disclosed Exposure

$7.02M

Companies

1

Total Filings

68

Lifetime Open-Market Net

-$26.84M

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	General Counsel	52,865	$132.75	$7.02M	-$26.84M	44	2026-06-18

Recent Filings

68 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
2026-06-18	DUOL	Exer (M)	+58	$836	EDGAR
2026-05-19	DUOL	Mixed	+21,614	$2.42M	EDGAR
2026-05-18	DUOL	Notice (144)	−1,977	-$221.5K	EDGAR
2026-05-15	DUOL	Notice (144)	−820	-$92.0K	EDGAR
2026-05-13	DUOL	Exer (M)	+648	$9.3K	EDGAR
2026-02-20	DUOL	Sell (S)	−2,797	-$313.9K	EDGAR
2026-02-18	DUOL	Notice (144)	−1,901	-$213.1K	EDGAR
2026-02-17	DUOL	Notice (144)	−896	-$98.6K	EDGAR
2025-12-30	DUOL	Exer (M)	+1,800	$26.0K	EDGAR
2025-11-19	DUOL	Sell (S)	−2,796	-$494.4K	EDGAR

Showing 1–10 of 68

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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.